Oral health status among long-term hospitalized adults: a cross sectional study
Identifieur interne : 000766 ( Pmc/Corpus ); précédent : 000765; suivant : 000767Oral health status among long-term hospitalized adults: a cross sectional study
Auteurs : Leon Bilder ; Nirit Yavnai ; Avi ZiniSource :
- PeerJ [ 2167-8359 ] ; 2014.
Abstract
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DOI: 10.7717/peerj.423
PubMed: 24949240
PubMed Central: 4060041
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">Oral health status among long-term hospitalized adults: a cross sectional study</title><author><name sortKey="Bilder, Leon" sort="Bilder, Leon" uniqKey="Bilder L" first="Leon" last="Bilder">Leon Bilder</name><affiliation><nlm:aff id="aff-1"><institution>Department of Periodontology, School of Graduate Dentistry, Rambam Health Care Campus</institution>,<addr-line>Haifa</addr-line>,<country>Israel</country></nlm:aff></affiliation></author><author><name sortKey="Yavnai, Nirit" sort="Yavnai, Nirit" uniqKey="Yavnai N" first="Nirit" last="Yavnai">Nirit Yavnai</name><affiliation><nlm:aff id="aff-2"><institution>Medical Corps, IDF</institution>,<country>Israel</country></nlm:aff></affiliation></author><author><name sortKey="Zini, Avi" sort="Zini, Avi" uniqKey="Zini A" first="Avi" last="Zini">Avi Zini</name><affiliation><nlm:aff id="aff-3"><institution>Department of Community Dentistry, Hadassah School of Dental Medicine, Hebrew University, Hadassah</institution>,<addr-line>Jerusalem</addr-line>,<country>Israel</country></nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">24949240</idno><idno type="pmc">4060041</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4060041</idno><idno type="RBID">PMC:4060041</idno><idno type="doi">10.7717/peerj.423</idno><date when="2014">2014</date><idno type="wicri:Area/Pmc/Corpus">000766</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">000766</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Oral health status among long-term hospitalized adults: a cross sectional study</title><author><name sortKey="Bilder, Leon" sort="Bilder, Leon" uniqKey="Bilder L" first="Leon" last="Bilder">Leon Bilder</name><affiliation><nlm:aff id="aff-1"><institution>Department of Periodontology, School of Graduate Dentistry, Rambam Health Care Campus</institution>,<addr-line>Haifa</addr-line>,<country>Israel</country></nlm:aff></affiliation></author><author><name sortKey="Yavnai, Nirit" sort="Yavnai, Nirit" uniqKey="Yavnai N" first="Nirit" last="Yavnai">Nirit Yavnai</name><affiliation><nlm:aff id="aff-2"><institution>Medical Corps, IDF</institution>,<country>Israel</country></nlm:aff></affiliation></author><author><name sortKey="Zini, Avi" sort="Zini, Avi" uniqKey="Zini A" first="Avi" last="Zini">Avi Zini</name><affiliation><nlm:aff id="aff-3"><institution>Department of Community Dentistry, Hadassah School of Dental Medicine, Hebrew University, Hadassah</institution>,<addr-line>Jerusalem</addr-line>,<country>Israel</country></nlm:aff></affiliation></author></analytic><series><title level="j">PeerJ</title><idno type="eISSN">2167-8359</idno><imprint><date when="2014">2014</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p><bold>Background.</bold> Many Long-Term Care (LTC) institutionalized patients are the most frail and functionally dependent among the geriatric population and have significant oral health disparities.They often suffer from dental neglect due to limited access to appropriate professional dental care. These patients have chronic health situations and are treated with medications, which increase their risk of oral diseases. Despite the growth in elderly population in Israel, there is insufficient data regarding their oral health status and treatment needs.</p><p><bold>Objective.</bold> To describe the oral health status of the LTC hospitalized adults in a geriatric and psychiatric hospital in Israel.</p><p><bold>Methods.</bold> Data was recorded from LTC hospitalized adults with a physical and/or mental disabilities in a cross-sectional research design, which included general health anamnesis and clinical oral examination. Variables included gender, medicines, oral hygiene (OH), using dentures, number of caries lesions and residual teeth. Univariate analyses included Pearson <italic>χ</italic><sup>2</sup> and <italic>t</italic>-test analyses. Multivariate analyses included logistic and linear regressions while the outcome variables were categorical OH index and number of carious cavitations, number of residual teeth and carious teeth percentage.</p><p><bold>Results.</bold> 153 participants were included in the study with a mean age of 65.03 ± 18.67 years. 31.3% of the patients were edentulous, and only 14% had partial or full dentures. Females had a significantly higher number of caries cavitation than males (<italic>P</italic> = 0.044). The number of caries cavitation was higher among patients with poor OH (<italic>P</italic> < 0.001) and when taking Clonazepam (<italic>P</italic> = 0.018). Number of residual teeth was higher in the fair OH group (<italic>P</italic> < 0.001). Carious teeth percentage was higher among the poor OH group (<italic>P</italic> < 0.001).</p></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Abdollahi, M" uniqKey="Abdollahi M">M Abdollahi</name></author><author><name sortKey="Radfar, M" uniqKey="Radfar M">M Radfar</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Abdollahi, M" uniqKey="Abdollahi M">M Abdollahi</name></author><author><name sortKey="Rahimi, R" uniqKey="Rahimi R">R Rahimi</name></author><author><name sortKey="Radfar, M" uniqKey="Radfar M">M Radfar</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Abnet, Cc" uniqKey="Abnet C">CC Abnet</name></author><author><name sortKey="Qiao, Yl" uniqKey="Qiao Y">YL Qiao</name></author><author><name sortKey="Dawsey, Sm" uniqKey="Dawsey S">SM Dawsey</name></author><author><name sortKey="Dong, Zw" uniqKey="Dong Z">ZW Dong</name></author><author><name sortKey="Taylor, 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<front><journal-meta><journal-id journal-id-type="nlm-ta">PeerJ</journal-id><journal-id journal-id-type="iso-abbrev">PeerJ</journal-id><journal-id journal-id-type="pmc">PeerJ</journal-id><journal-id journal-id-type="publisher-id">PeerJ</journal-id><journal-title-group><journal-title>PeerJ</journal-title></journal-title-group><issn pub-type="epub">2167-8359</issn><publisher><publisher-name>PeerJ Inc.</publisher-name><publisher-loc>San Francisco, USA</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">24949240</article-id><article-id pub-id-type="pmc">4060041</article-id><article-id pub-id-type="publisher-id">423</article-id><article-id pub-id-type="doi">10.7717/peerj.423</article-id><article-categories><subj-group subj-group-type="heading"><subject>Dentistry</subject></subj-group><subj-group subj-group-type="heading"><subject>Epidemiology</subject></subj-group><subj-group subj-group-type="heading"><subject>Evidence Based Medicine</subject></subj-group><subj-group subj-group-type="heading"><subject>Health Policy</subject></subj-group><subj-group subj-group-type="heading"><subject>Public Health</subject></subj-group></article-categories><title-group><article-title>Oral health status among long-term hospitalized adults: a cross sectional study</article-title></title-group><contrib-group><contrib id="author-1" contrib-type="author" corresp="yes"><name><surname>Bilder</surname><given-names>Leon</given-names></name><xref ref-type="aff" rid="aff-1">1</xref><email>leon.bilder1@gmail.com</email></contrib><contrib id="author-2" contrib-type="author"><name><surname>Yavnai</surname><given-names>Nirit</given-names></name><xref ref-type="aff" rid="aff-2">2</xref></contrib><contrib id="author-3" contrib-type="author"><name><surname>Zini</surname><given-names>Avi</given-names></name><xref ref-type="aff" rid="aff-3">3</xref></contrib><aff id="aff-1"><label>1</label><institution>Department of Periodontology, School of Graduate Dentistry, Rambam Health Care Campus</institution>,<addr-line>Haifa</addr-line>,<country>Israel</country></aff><aff id="aff-2"><label>2</label><institution>Medical Corps, IDF</institution>,<country>Israel</country></aff><aff id="aff-3"><label>3</label><institution>Department of Community Dentistry, Hadassah School of Dental Medicine, Hebrew University, Hadassah</institution>,<addr-line>Jerusalem</addr-line>,<country>Israel</country></aff></contrib-group><contrib-group><contrib id="editor-1" contrib-type="editor"><name><surname>Levin</surname><given-names>Liran</given-names></name></contrib></contrib-group><pub-date pub-type="epub" date-type="pub" iso-8601-date="2014-06-10"><day>10</day><month>6</month><year iso-8601-date="2014">2014</year></pub-date><pub-date pub-type="collection"><year>2014</year></pub-date><volume>2</volume><elocation-id>e423</elocation-id><history><date date-type="received" iso-8601-date="2013-12-26"><day>26</day><month>12</month><year iso-8601-date="2013">2013</year></date><date date-type="accepted" iso-8601-date="2014-05-20"><day>20</day><month>5</month><year iso-8601-date="2014">2014</year></date></history><permissions><copyright-statement>© 2014 Bilder et al.</copyright-statement><copyright-year>2014</copyright-year><copyright-holder>Bilder et al.</copyright-holder><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/3.0/"><license-p>This is an open access article distributed under the terms of the <ext-link ext-link-type="uri" xlink:href="http://creativecommons.org/licenses/by/3.0/">Creative Commons Attribution License</ext-link>, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.</license-p></license></permissions><self-uri xlink:href="https://peerj.com/articles/423"></self-uri><abstract><p><bold>Background.</bold> Many Long-Term Care (LTC) institutionalized patients are the most frail and functionally dependent among the geriatric population and have significant oral health disparities.They often suffer from dental neglect due to limited access to appropriate professional dental care. These patients have chronic health situations and are treated with medications, which increase their risk of oral diseases. Despite the growth in elderly population in Israel, there is insufficient data regarding their oral health status and treatment needs.</p><p><bold>Objective.</bold> To describe the oral health status of the LTC hospitalized adults in a geriatric and psychiatric hospital in Israel.</p><p><bold>Methods.</bold> Data was recorded from LTC hospitalized adults with a physical and/or mental disabilities in a cross-sectional research design, which included general health anamnesis and clinical oral examination. Variables included gender, medicines, oral hygiene (OH), using dentures, number of caries lesions and residual teeth. Univariate analyses included Pearson <italic>χ</italic><sup>2</sup> and <italic>t</italic>-test analyses. Multivariate analyses included logistic and linear regressions while the outcome variables were categorical OH index and number of carious cavitations, number of residual teeth and carious teeth percentage.</p><p><bold>Results.</bold> 153 participants were included in the study with a mean age of 65.03 ± 18.67 years. 31.3% of the patients were edentulous, and only 14% had partial or full dentures. Females had a significantly higher number of caries cavitation than males (<italic>P</italic> = 0.044). The number of caries cavitation was higher among patients with poor OH (<italic>P</italic> < 0.001) and when taking Clonazepam (<italic>P</italic> = 0.018). Number of residual teeth was higher in the fair OH group (<italic>P</italic> < 0.001). Carious teeth percentage was higher among the poor OH group (<italic>P</italic> < 0.001).</p></abstract><kwd-group kwd-group-type="author"><kwd>Oral health</kwd><kwd>Institutionalised hospital care</kwd><kwd>Edentulousness and oral hygiene</kwd></kwd-group><funding-group><funding-statement>The authors declare there was no funding for this work.</funding-statement></funding-group></article-meta></front><body><sec sec-type="intro"><title>Introduction</title><p>The World Health Organization (WHO) Global Oral Health Program has emphasized the importance of increasing the awareness of oral health worldwide as a major component of general health and quality of life (<xref rid="ref-27" ref-type="bibr">Petersen et al., 2005</xref>). Oral diseases are the most common chronic illnesses and are a significant public health problem due to their prevalence impact on individuals and on society, and the expense of their treatment (<xref rid="ref-33" ref-type="bibr">Sheiham, 2005</xref>).</p><p>A report from the U.S. Surgeon General noted that oral problems (e.g., dental caries periodontal disease, tooth loss, dry mouth, oral cancer, chewing problems, pain or discomfort) in older adult and disabled populations are the most common unmet health needs, and that oral diseases are often related to general health problems (<xref rid="ref-22" ref-type="bibr">National Institute of Dental and Craniofacial Research, 2000</xref>). Inferior oral status can lead to serious health consequences, such as abscesses, pain, bacteremia, septicemia and chronic disease (<xref rid="ref-5" ref-type="bibr">Berkey & Scannapieco, 2013</xref>).</p><p>Numerous studies have documented a very poor oral health and limited access to dental care among adults residing in long-term care (LTC) facilities (<xref rid="ref-39" ref-type="bibr">Wyatt, 2002a</xref>; <xref rid="ref-40" ref-type="bibr">Wyatt, 2002b</xref>). These patients have physical limitations, chronic diseases, and the majority require medication, which increase the risk of oral diseases and subsequently elevated susceptibility to a lot of side effects with oral manifestations (<xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>; <xref rid="ref-6" ref-type="bibr">Bharti & Bansal, 2013</xref>; <xref rid="ref-2" ref-type="bibr">Abdollahi, Rahimi & Radfar, 2008</xref>). In addition, many of those patients receive nasogastric feeding and/or mechanical ventilation and are at risk for malnutrition, especially those living in institutions (<xref rid="ref-16" ref-type="bibr">Kaiser et al., 2010</xref>). Despite the fact that the vast majority of the elderly are living independently, a minority (estimates of 3–5% in United States, Canada, Israel and Finland) are functionally impaired, requiring long-term nursing (<xref rid="ref-24" ref-type="bibr">Niessen, 2000</xref>; <xref rid="ref-18" ref-type="bibr">Kozyrskyi, De Coster & St John, 2000</xref>; <xref rid="ref-32" ref-type="bibr">Schmid, 2009</xref>; <xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>), most LTC patients are considered elderly (<xref rid="ref-18" ref-type="bibr">Kozyrskyi, De Coster & St John, 2000</xref>; <xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>).</p><p>Few studies have shown an association between malnutrition (<xref rid="ref-30" ref-type="bibr">Saletti et al., 2005</xref>; <xref rid="ref-8" ref-type="bibr">Chan et al., 2010</xref>), dentition status (<xref rid="ref-3" ref-type="bibr">Abnet et al., 2005</xref>; <xref rid="ref-25" ref-type="bibr">Osterberg et al., 2008</xref>), and mortality. The institutionalized and homebound LTC elderly patients are the most frail and functionally dependent among the geriatric population with significant oral health disparities (<xref rid="ref-15" ref-type="bibr">Isaksson & Söderfeldt, 2007</xref>). Dental care for the institutionalized is often limited to emergency care and is not aimed to daily oral care (<xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>). Many medically compromised LTC patients might have tube fed or suffer from swallowing difficulties (<xref rid="ref-20" ref-type="bibr">Matear, 1999</xref>). That might be related to oral problems such as denture-related diseases, coated tongue, angular cheilitis and Candida-associated denture stomatitis (<xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>; <xref rid="ref-31" ref-type="bibr">Samaranayake et al., 1995</xref>; <xref rid="ref-15" ref-type="bibr">Isaksson & Söderfeldt, 2007</xref>).</p><p>There is a lack of in-depth information regarding oral health state of the growing elderly population in Israel. At 1948, when the state of Israel was established, elderly population comprised 3% of the total population, as compared to 2008 with slightly over 10%, while most of the LTC patients are treated at their homes (<xref rid="ref-32" ref-type="bibr">Schmid, 2009</xref>).</p><p>The present cross-sectional epidemiological survey was conducted at Herzog Hospital in Jerusalem, which is the third largest hospital in the capital and Israel’s foremost center for geriatric and psychiatric health care. This study was part of an intervention program aimed to prevent and improve oral health among long-term hospitalized adults, and was performed from 2010 to 2011.</p><p>The aim of this study was to describe the oral health status of the long-term hospitalized adults at Herzog Hospital, Jerusalem.</p></sec><sec sec-type="methods"><title>Methods</title><p>The study population included long-term care inpatients; with inclusion criteria of being hospitalized for more than 6 months at Hertzog Geriatric and Psychiatric Health Care center in Jerusalem. The vast majority of the hospital’s population comprises of disabled, psychiatric and geriatric hospitalized long term patients from a variety of ages. Patients that were undergoing dialysis, acute psychiatric patients and others defined by a hospital nursing team, as a “temporary patients” were excluded. The study was approved by the Hertzog Hospital Institutional Review Board (#180-10). All surveyed patients were older than 18 years old. These patients were previously diagnosed as having physical and/or mental disabilities with no communications skills due to either cognitive or mental reasons. Usage of nasogastric and mechanical ventilation was recorded.</p><p>Pre-test clinical examination was carried out by two dentists who were calibrated. The calibration process included clinical examination of ten patients, while data was recorded separately and then a comparison and a discussion on the findings were done. General health anamneses, including medication usage, were recorded from the hospital’s medical files. Clinical examinations included presence of Angular Cheilitis, mucosal lesion, coronal and root decay, number of residual teeth, Oral Hygiene Index (OHI) and denture status. The patients were examined in their rooms at their bedside. The clinical examinations were carried out under artificial light with a dental mirror and a CPI probe (Martin, Solingen, WHO 973/80, Germany). Teeth were neither dried nor cleaned before the examination. Dental status was recorded for each tooth. A tooth was recorded as present when it was fully or partially visible in the mouth. Dental caries were recorded according to the WHO criteria (<xref rid="ref-38" ref-type="bibr">World Health Organization, 2013</xref>) and no radiographs were taken during the evaluation. It was decided that a decayed tooth was counted as a tooth with clinical observed caries, regardless of the number of caries foci on that tooth. DMFT or any other caries experience index was not conducted. The variable “carious teeth percentages” was calculated as the rate between number of dental caries cavitations and the number of residual teeth in the mouth. A modification of the Silness & Löe plaque index was used for the assessment of oral hygiene (OH) (<xref rid="ref-35" ref-type="bibr">Silness & Loe, 1964</xref>) in six index teeth: 16,12, 24, 36, 32, 44. Each of the four teeth surfaces (buccal, lingual, mesial and distal) was given a score from 0 to 3 (0 = No plaque; 1 = a film of plaque adhering to the free gingival margin and adjacent area of the tooth; 2 = moderate accumulation of soft deposits within the gingival pocket or the tooth and gingival margin; 3 = abundance of soft matter within the gingival pocket and/or on the tooth and gingival margin). Mean score was calculated for every participant. No disclosing solution was used in this modification. In the case of absent tooth, adjacent tooth was examined and recorded. In case the whole sextant was absent, no score was recorded. For further analyses, the OHI index results were dichotomized into two categories and were renamed as the variable “OHI2”: poor OH, score of three = 1, high OH (low OH score, fair OH) = 0. The presence of removable dentures was recorded for each jaw and was dichotomized as a full or partial denture per patient.</p><p>The data was collected and inserted into an Excel sheet, and transferred to SPSS version 17.0 for statistical analysis. Pearson Chi-square test was employed for testing the statistical significance of differences between gender, taking medicines (categorical variables), OHI2 and using dentures. Independent <italic>t</italic>-test was employed detecting differences between number of caries cavitations, number of residual teeth and percentage of carious teeth with the categorical variables above. Correlation between numerical variables (age, number of teeth and percentage of carious teeth) was employed using Pearson correlation coefficient. The level of significance was set as <italic>P</italic> < 0.05. Multiple Logistic Regression was conducted to eliminate potential confounders and mediators among all the variables tested with OHI2 as the dependent variable. Variables that showed a significance level of less than <italic>P</italic> < 0.15 in the univariate analyses were included in the regression. Linear regression analysis was conducted when the dependent numerical variables were number of caries cavitations, number of residual teeth and percentage of carious teeth.</p></sec><sec sec-type="results"><title>Results</title><p>One hundred fifty three LTC hospitalized individuals (57.4% were males, 42.6% females) were included in this study. Mean age was 65.03 ± 18.67 years, while the age range was 19–96 years with a median of 68 years. Mechanical ventilated were among 33.1% of the participants, while 41.8% had nasogastric feeding device.</p><p>Clinical data was available only for 144 (91.1%) patients due to difficulties with the clinical examination. 12.7% of all participants had partial or full dentures. One third (31.3%) of the patients were total edentulous, from them only 28.9% had a denture. Fourteen percent of the study population presented Angular Cheilitis. All participants consumed chronic medicines. The common prescriptions were: Clonazepam (30.1%), which is a benzodiazepine drug having anxiolytic, anticonvulsant, muscle relaxant and sedative properties and Lactulose (17.0%), which is a synthetic, non-digestible sugar, used in the treatment of chronic constipation and hepatic encephalopathy. There were multiple routes of drug administration depending on the subject’s health condition.</p><p>The mean number of residual teeth was 11.35 ± 10.77. Age was found to be significantly correlated in a decreasing relationship with number of residual teeth (Pearson coefficient: 0.510, <italic>P</italic> < 0.001). Mean number of caries cavitation was 4.17 ± 4.50. <xref ref-type="table" rid="table-1">Table 1</xref> presents the associations by gender, Clonazepam obtaining with dichotomy oral hygiene (OH) scores (OHI2) and denture usage. Gender was not associated to OH scores and denture usage. Most of the patients (75%) who received Clonazepam presented higher OH score (<italic>P</italic> = 0.018). Obtaining Clonazepam was not associated with denture usage.</p><table-wrap id="table-1" orientation="portrait" position="float"><object-id pub-id-type="doi">10.7717/peerj.423/table-1</object-id><label>Table 1</label><caption><title>Distribution of dichotomic plaque scores and denture usage by gender and medical status.</title></caption><alternatives><graphic xlink:href="peerj-02-423-g001"></graphic><table frame="hsides" rules="groups"><colgroup span="1"><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col></colgroup><thead><tr><th rowspan="1" colspan="1"></th><th rowspan="1" colspan="1"></th><th align="center" colspan="6" rowspan="1">OHI2</th><th rowspan="1" colspan="1"><italic>P</italic><xref ref-type="fn" rid="table-1fn1"><sup>*</sup></xref></th><th align="center" colspan="6" rowspan="1">Denture</th><th rowspan="1" colspan="1"><italic>P</italic><xref ref-type="fn" rid="table-1fn1"><sup>*</sup></xref></th></tr><tr><th rowspan="1" colspan="1"></th><th rowspan="1" colspan="1"></th><th align="center" colspan="2" rowspan="1">0 (0–2)</th><th align="center" colspan="2" rowspan="1">1 (3)</th><th align="center" colspan="2" rowspan="1">Total</th><th rowspan="1" colspan="1"></th><th align="center" colspan="2" rowspan="1">0 no</th><th align="center" colspan="2" rowspan="1">1 yes</th><th align="center" colspan="2" rowspan="1">Total</th><th rowspan="1" colspan="1"></th></tr><tr><th rowspan="1" colspan="1"></th><th rowspan="1" colspan="1"></th><th rowspan="1" colspan="1"><italic>n</italic></th><th rowspan="1" colspan="1">%</th><th rowspan="1" colspan="1"><italic>n</italic></th><th rowspan="1" colspan="1">%</th><th rowspan="1" colspan="1"><italic>n</italic></th><th rowspan="1" colspan="1">%</th><th rowspan="1" colspan="1"></th><th rowspan="1" colspan="1"><italic>n</italic></th><th rowspan="1" colspan="1">%</th><th rowspan="1" colspan="1"><italic>n</italic></th><th rowspan="1" colspan="1">%</th><th rowspan="1" colspan="1"><italic>n</italic></th><th rowspan="1" colspan="1">%</th><th rowspan="1" colspan="1"></th></tr></thead><tbody><tr><td rowspan="1" colspan="1"><bold>Gender</bold></td><td rowspan="1" colspan="1">Male</td><td rowspan="1" colspan="1">28</td><td rowspan="1" colspan="1">51.9</td><td rowspan="1" colspan="1">26</td><td rowspan="1" colspan="1">48.1</td><td rowspan="1" colspan="1">54</td><td rowspan="1" colspan="1">57.4</td><td rowspan="2" colspan="1">0.061</td><td rowspan="1" colspan="1">73</td><td rowspan="1" colspan="1">90.1</td><td rowspan="1" colspan="1">8</td><td rowspan="1" colspan="1">9.9</td><td rowspan="1" colspan="1">81</td><td rowspan="1" colspan="1">56.6</td><td rowspan="1" colspan="1">0.264</td></tr><tr><td rowspan="1" colspan="1">Female</td><td rowspan="1" colspan="1">13</td><td rowspan="1" colspan="1">32.5</td><td rowspan="1" colspan="1">27</td><td rowspan="1" colspan="1">67.5</td><td rowspan="1" colspan="1">40</td><td rowspan="1" colspan="1">42.6</td><td rowspan="1" colspan="1">52</td><td rowspan="1" colspan="1">83.9</td><td rowspan="1" colspan="1">10</td><td rowspan="1" colspan="1">16.1</td><td rowspan="1" colspan="1">62</td><td rowspan="1" colspan="1">43.4</td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1"><bold>Clonazepam</bold></td><td rowspan="1" colspan="1">No</td><td rowspan="1" colspan="1">34</td><td rowspan="1" colspan="1">51.5</td><td rowspan="1" colspan="1">32</td><td rowspan="1" colspan="1">48.4</td><td rowspan="1" colspan="1">66</td><td rowspan="1" colspan="1">70.2</td><td rowspan="2" colspan="1">0.018<xref ref-type="fn" rid="table-1fn1"><sup>*</sup></xref></td><td rowspan="1" colspan="1">86</td><td rowspan="1" colspan="1">86.0</td><td rowspan="1" colspan="1">14</td><td rowspan="1" colspan="1">14.0</td><td rowspan="1" colspan="1">100</td><td rowspan="1" colspan="1">69.9</td><td rowspan="1" colspan="1">0.437</td></tr><tr><td rowspan="1" colspan="1">Yes</td><td rowspan="1" colspan="1">7</td><td rowspan="1" colspan="1">25.0</td><td rowspan="1" colspan="1">21</td><td rowspan="1" colspan="1">75.0</td><td rowspan="1" colspan="1">28</td><td rowspan="1" colspan="1">29.8</td><td rowspan="1" colspan="1">39</td><td rowspan="1" colspan="1">90.7</td><td rowspan="1" colspan="1">4</td><td rowspan="1" colspan="1">9.3</td><td rowspan="1" colspan="1">43</td><td rowspan="1" colspan="1">30.1</td><td rowspan="1" colspan="1"></td></tr></tbody></table></alternatives><table-wrap-foot><fn id="table-1fn"><p><bold>Notes.</bold></p></fn><fn id="table-1fn1"><label>*</label><p>Pearson Chi square, statistically significance at <italic>P</italic> < 0.05.</p></fn></table-wrap-foot></table-wrap><p>The number of caries cavitations, number of residual teeth and carious teeth percentage were not found to be statistical significant among patients who were being mechanically ventilated. Number of residual teeth in the mouth were significantly lower when using a nasogastric feeding device (8.57 ± 10.43 vs. 13.40 ± 10.62, <italic>P</italic> = 0.007). <xref ref-type="table" rid="table-2">Table 2</xref> presents the numerical descriptive results of the number of caries cavitations, number of residual teeth, and carious teeth percentage by gender, OHI2 score and Clonazepam obtaining. Females had significantly higher number of caries cavitation than men (5.25 ± 5.25 and 3.36 ± 3.70 respectively, <italic>P</italic> = 0.044). The number of caries cavitation was higher among patients with higher OHI2 scores (5.96 ± 5.12 vs. 2.00 ± 2.23, <italic>P</italic> < 0.001) and when taking Clonazepam (5.89 ± 5.71 vs. 3.47 ± 3.73, <italic>P</italic> = 0.018). Number of residual teeth was higher in the low OH score group (20.98 ± 7.75 vs. 14.23 ± 8.62, <italic>P</italic> < 0.001). Carious teeth percentage was higher among the high OH score group (53.61 ± 35.03 vs. 14.88 ± 23.00, <italic>P</italic> < 0.001).</p><table-wrap id="table-2" orientation="portrait" position="float"><object-id pub-id-type="doi">10.7717/peerj.423/table-2</object-id><label>Table 2</label><caption><title>Mean and standard deviation of number of caries cavitations, number of residual teeth, and percentages of carious teeth by gender, dichotomic plaque scores, and taking Clonazepam.</title></caption><alternatives><graphic xlink:href="peerj-02-423-g002"></graphic><table frame="hsides" rules="groups"><colgroup span="1"><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col></colgroup><thead><tr><th rowspan="1" colspan="1"></th><th rowspan="1" colspan="1"></th><th align="center" colspan="4" rowspan="1">Number of caries cavitations</th><th align="center" colspan="4" rowspan="1">Number of residual teeth</th><th align="center" colspan="4" rowspan="1">Carious teeth percentage</th></tr><tr><th rowspan="1" colspan="1"></th><th rowspan="1" colspan="1"></th><th rowspan="1" colspan="1"><italic>N</italic></th><th rowspan="1" colspan="1">Mean ± SD</th><th rowspan="1" colspan="1">CI</th><th rowspan="1" colspan="1"><italic>P</italic><xref ref-type="fn" rid="table-2fn1"><sup>*</sup></xref></th><th rowspan="1" colspan="1"><italic>N</italic></th><th rowspan="1" colspan="1">Mean ± SD</th><th rowspan="1" colspan="1">CI</th><th rowspan="1" colspan="1"><italic>P</italic><xref ref-type="fn" rid="table-2fn1"><sup>*</sup></xref></th><th rowspan="1" colspan="1"><italic>N</italic></th><th rowspan="1" colspan="1">Mean ± SD</th><th rowspan="1" colspan="1">CI</th><th rowspan="1" colspan="1"><italic>P</italic><xref ref-type="fn" rid="table-2fn1"><sup>*</sup></xref></th></tr></thead><tbody><tr><td rowspan="1" colspan="1"><bold>Gender</bold></td><td rowspan="1" colspan="1">Male</td><td rowspan="1" colspan="1">53</td><td rowspan="1" colspan="1">3.36 ± 3.70</td><td rowspan="1" colspan="1">2.34–4.38</td><td rowspan="2" colspan="1">0.044<xref ref-type="fn" rid="table-2fn1"><sup>*</sup></xref></td><td rowspan="1" colspan="1">81</td><td rowspan="1" colspan="1">11.58 ± 10.64</td><td rowspan="1" colspan="1">9.23 ± 13.93</td><td rowspan="2" colspan="1">0.776</td><td rowspan="1" colspan="1">53</td><td rowspan="1" colspan="1">31.62 ± 34.17</td><td rowspan="1" colspan="1">22.20–41.04</td><td rowspan="1" colspan="1">0.113</td></tr><tr><td rowspan="1" colspan="1">Female</td><td rowspan="1" colspan="1">40</td><td rowspan="1" colspan="1">5.25 ± 5.25</td><td rowspan="1" colspan="1">3.57–6.93</td><td rowspan="1" colspan="1">63</td><td rowspan="1" colspan="1">11.06 ± 11.02</td><td rowspan="1" colspan="1">8.29 ± 13.84</td><td rowspan="1" colspan="1">40</td><td rowspan="1" colspan="1">43.42 ± 36.48</td><td rowspan="1" colspan="1">31.75–55.08</td></tr><tr><td rowspan="1" colspan="1"><bold>OHI2</bold></td><td rowspan="1" colspan="1">0 (0–2)</td><td rowspan="1" colspan="1">40</td><td rowspan="1" colspan="1">2.00 ± 2.23</td><td rowspan="1" colspan="1">1.29–2.71</td><td rowspan="2" colspan="1"><0.001<xref ref-type="fn" rid="table-2fn1"><sup>*</sup></xref></td><td rowspan="1" colspan="1">41</td><td rowspan="1" colspan="1">20.98 ± 7.75</td><td rowspan="1" colspan="1">18.53–23.42</td><td rowspan="1" colspan="1"><0.001<xref ref-type="fn" rid="table-2fn1"><sup>*</sup></xref></td><td rowspan="1" colspan="1">40</td><td rowspan="1" colspan="1">14.88 ± 23.00</td><td rowspan="1" colspan="1">7.53–22.24</td><td rowspan="2" colspan="1"><0.001<xref ref-type="fn" rid="table-2fn1"><sup>*</sup></xref></td></tr><tr><td rowspan="1" colspan="1">1 (3)</td><td rowspan="1" colspan="1">51</td><td rowspan="1" colspan="1">5.96 ± 5.12</td><td rowspan="1" colspan="1">4.52–7.40</td><td rowspan="1" colspan="1">53</td><td rowspan="1" colspan="1">14.23 ± 8.62</td><td rowspan="1" colspan="1">11.85 ± 16.60</td><td rowspan="1" colspan="1">51</td><td rowspan="1" colspan="1">53.61 ± 35.03</td><td rowspan="1" colspan="1">43.76–63.46</td></tr><tr><td rowspan="1" colspan="1"><bold>Clonazepam</bold></td><td rowspan="1" colspan="1">No</td><td rowspan="1" colspan="1">66</td><td rowspan="1" colspan="1">3.47 ± 3.73</td><td rowspan="1" colspan="1">2.55–4.39</td><td rowspan="2" colspan="1">0.018<xref ref-type="fn" rid="table-2fn1"><sup>*</sup></xref></td><td rowspan="1" colspan="1">100</td><td rowspan="1" colspan="1">11.67 ± 10.97</td><td rowspan="1" colspan="1">9.49–13.85</td><td rowspan="2" colspan="1">0.597</td><td rowspan="1" colspan="1">66</td><td rowspan="1" colspan="1">32.96 ± 33.83</td><td rowspan="1" colspan="1">24.64–41.27</td><td rowspan="2" colspan="1">0.112</td></tr><tr><td rowspan="1" colspan="1">Yes</td><td rowspan="1" colspan="1">27</td><td rowspan="1" colspan="1">5.89 ± 5.71</td><td rowspan="1" colspan="1">3.63–8.15</td><td rowspan="1" colspan="1">44</td><td rowspan="1" colspan="1">10.64 ± 10.38</td><td rowspan="1" colspan="1">7.48–13.79</td><td rowspan="1" colspan="1">27</td><td rowspan="1" colspan="1">45.84–38.33</td><td rowspan="1" colspan="1">30.68–61.00</td></tr></tbody></table></alternatives><table-wrap-foot><fn id="table-2fn"><p><bold>Notes.</bold></p></fn><fn id="table-2fn1"><label>*</label><p>Independent <italic>t</italic> test, statistical significance at <italic>P</italic> < 0.05.</p></fn></table-wrap-foot></table-wrap><p>The results of the multivariate logistic regression analysis indicated that only the percentage of carious teeth was a predictor for a high OH score (OR = 1.05, <italic>P</italic> = 0.002, <italic>R</italic><sup>2</sup> = 0.435) (<xref ref-type="table" rid="table-3">Table 3</xref>). In a linear regression analysis, high OH score was a predictor for caries cavitation (<italic>P</italic> < 0.001), number of residual teeth (<italic>P</italic> < 0.001), and for carious teeth percentage (<italic>P</italic> < 0.001, <xref ref-type="table" rid="table-4">Table 4</xref>).</p><table-wrap id="table-3" orientation="portrait" position="float"><object-id pub-id-type="doi">10.7717/peerj.423/table-3</object-id><label>Table 3</label><caption><title>Logistic regression for effect of independent variables on dichotomic plaque score group.</title></caption><alternatives><graphic xlink:href="peerj-02-423-g003"></graphic><table frame="hsides" rules="groups"><colgroup span="1"><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col></colgroup><thead><tr><th rowspan="1" colspan="1"></th><th rowspan="1" colspan="1">B</th><th rowspan="1" colspan="1">OR</th><th rowspan="1" colspan="1">95% CI</th><th rowspan="1" colspan="1"><italic>p</italic></th></tr></thead><tbody><tr><td rowspan="1" colspan="1">Gender</td><td rowspan="1" colspan="1">−0.36</td><td rowspan="1" colspan="1">0.70</td><td rowspan="1" colspan="1">0.24–2.06</td><td rowspan="1" colspan="1">0.516</td></tr><tr><td rowspan="1" colspan="1">Clonazepam</td><td rowspan="1" colspan="1">−0.90</td><td rowspan="1" colspan="1">0.41</td><td rowspan="1" colspan="1">0.12–1.32</td><td rowspan="1" colspan="1">0.134</td></tr><tr><td rowspan="1" colspan="1">Number of teeth</td><td rowspan="1" colspan="1">−0.00</td><td rowspan="1" colspan="1">0.98</td><td rowspan="1" colspan="1">0.92–1.08</td><td rowspan="1" colspan="1">0.950</td></tr><tr><td rowspan="1" colspan="1">Percentages caries</td><td rowspan="1" colspan="1">0.05</td><td rowspan="1" colspan="1">1.05</td><td rowspan="1" colspan="1">1.02–1.08</td><td rowspan="1" colspan="1">0.002<xref ref-type="fn" rid="table-3fn1"><sup>*</sup></xref></td></tr><tr><td rowspan="1" colspan="1">Constant</td><td rowspan="1" colspan="1">−0.19</td><td rowspan="1" colspan="1">0.83</td><td rowspan="1" colspan="1">—</td><td rowspan="1" colspan="1">0.882</td></tr></tbody></table></alternatives><table-wrap-foot><fn id="table-3fn"><p><bold>Notes.</bold></p></fn><fn id="table-3fn1"><label>*</label><p>Nagelkerke <italic>R</italic><sup>2</sup> = 0.435.</p></fn></table-wrap-foot></table-wrap><table-wrap id="table-4" orientation="portrait" position="float"><object-id pub-id-type="doi">10.7717/peerj.423/table-4</object-id><label>Table 4</label><caption><title>Linear regression for effect of independent variables on number of caries cavitations.</title></caption><alternatives><graphic xlink:href="peerj-02-423-g004"></graphic><table frame="hsides" rules="groups"><colgroup span="1"><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col></colgroup><thead><tr><th rowspan="1" colspan="1"></th><th rowspan="1" colspan="1">B</th><th rowspan="1" colspan="1">Beta</th><th rowspan="1" colspan="1">95% CI</th><th rowspan="1" colspan="1"><italic>P</italic></th></tr></thead><tbody><tr><td rowspan="1" colspan="1"><bold>Outcome: number of caries cavitations</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1">Caries cavitations (-response)</td><td rowspan="1" colspan="1">1.06</td><td rowspan="1" colspan="1">0.12</td><td rowspan="1" colspan="1">−0.70–2.82</td><td rowspan="1" colspan="1">0.234</td></tr><tr><td rowspan="1" colspan="1">Dichotomic plaque score (OHI2)</td><td rowspan="1" colspan="1">3.80</td><td rowspan="1" colspan="1">0.42</td><td rowspan="1" colspan="1">2.07–5.53</td><td rowspan="1" colspan="1"><0.001</td></tr><tr><td rowspan="1" colspan="1">Mech ventilation</td><td rowspan="1" colspan="1">1.52</td><td rowspan="1" colspan="1">0.15</td><td rowspan="1" colspan="1">−0.42–3.47</td><td rowspan="1" colspan="1">0.124</td></tr><tr><td rowspan="1" colspan="1">Constant</td><td rowspan="1" colspan="1">0.51</td><td rowspan="1" colspan="1">—</td><td rowspan="1" colspan="1">−1.43–2.46</td><td rowspan="1" colspan="1">0.601</td></tr><tr><td rowspan="1" colspan="1"><bold>Outcome: number of residual teeth</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1">Age</td><td rowspan="1" colspan="1">−0.94</td><td rowspan="1" colspan="1">−0.19</td><td rowspan="1" colspan="1">−0.20–0.01</td><td rowspan="1" colspan="1">0.076</td></tr><tr><td rowspan="1" colspan="1">Dichotomic plaque score (OHI2)</td><td rowspan="1" colspan="1">−6.33</td><td rowspan="1" colspan="1">−0.36</td><td rowspan="1" colspan="1">−9.83–−2.83</td><td rowspan="1" colspan="1">0.001</td></tr><tr><td rowspan="1" colspan="1">Nasogastric tube</td><td rowspan="1" colspan="1">1.08</td><td rowspan="1" colspan="1">0.57</td><td rowspan="1" colspan="1">−2.86–5.03</td><td rowspan="1" colspan="1">0.587</td></tr><tr><td rowspan="1" colspan="1">Mech ventilation</td><td rowspan="1" colspan="1">3.45</td><td rowspan="1" colspan="1">0.18</td><td rowspan="1" colspan="1">−0.68–7.59</td><td rowspan="1" colspan="1">0.100</td></tr><tr><td rowspan="1" colspan="1">Clonazepam</td><td rowspan="1" colspan="1">0.08</td><td rowspan="1" colspan="1">0.00</td><td rowspan="1" colspan="1">−3.80–31.34</td><td rowspan="1" colspan="1">0.967</td></tr><tr><td rowspan="1" colspan="1">Constant</td><td rowspan="1" colspan="1">23.40</td><td rowspan="1" colspan="1">—</td><td rowspan="1" colspan="1">15.47–31.34</td><td rowspan="1" colspan="1"><0.001</td></tr><tr><td rowspan="1" colspan="1"><bold>Outcome: percentage of carious teeth</bold></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td><td rowspan="1" colspan="1"></td></tr><tr><td rowspan="1" colspan="1">Age</td><td rowspan="1" colspan="1">0.27</td><td rowspan="1" colspan="1">0.17</td><td rowspan="1" colspan="1">−0.10–0.64</td><td rowspan="1" colspan="1">0.148</td></tr><tr><td rowspan="1" colspan="1">Gender</td><td rowspan="1" colspan="1">6.80</td><td rowspan="1" colspan="1">0.09</td><td rowspan="1" colspan="1">−6.54–20.14</td><td rowspan="1" colspan="1">0.314</td></tr><tr><td rowspan="1" colspan="1">Dichotomic plaque score (OHI2)</td><td rowspan="1" colspan="1">35.69</td><td rowspan="1" colspan="1">0.50</td><td rowspan="1" colspan="1">22.15–49.22</td><td rowspan="1" colspan="1"><0.001</td></tr><tr><td rowspan="1" colspan="1">Clonazepam</td><td rowspan="1" colspan="1">5.60</td><td rowspan="1" colspan="1">0.07</td><td rowspan="1" colspan="1">−9.27–20.47</td><td rowspan="1" colspan="1">0.456</td></tr><tr><td rowspan="1" colspan="1">Constant</td><td rowspan="1" colspan="1">−3.67</td><td rowspan="1" colspan="1">—</td><td rowspan="1" colspan="1">−28.18–20.84</td><td rowspan="1" colspan="1">0.767</td></tr></tbody></table></alternatives></table-wrap></sec><sec sec-type="discussion"><title>Discussion</title><p>The survey included hospitalized individuals with a mean age of more than 65 years, which is younger than in previous published studies, since the inclusion criteria enabled participation for individuals older than 18 years (<xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>; <xref rid="ref-36" ref-type="bibr">Simunković et al., 2005</xref>; <xref rid="ref-14" ref-type="bibr">Iglesias Corchero & García Cepeda, 2008</xref>). This wide age range may explain the difference in the clinical findings. The literature displays edentulous prevalence of 20–45.3% in a variety of studies (<xref rid="ref-10" ref-type="bibr">Eachempati et al., 2013</xref>; <xref rid="ref-19" ref-type="bibr">Lo, Yan & Dyson, 2004</xref>; <xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>; <xref rid="ref-36" ref-type="bibr">Simunković et al., 2005</xref>). The WHO published comprehensive study presenting major differences between countries in prevalence of edentulousness among elderlies (<xref rid="ref-28" ref-type="bibr">Petersen & Yamamoto, 2005</xref>). Additionally, the number of residual teeth (a mean of 11.35) decreased with increasing age, in spite of the wide age range and many young participants, lower number than the results found in previous studies (12.4 in <xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>, in Finland, 12.9 in <xref rid="ref-4" ref-type="bibr">Arpin, Brodeur & Corbeil, 2008</xref>, in Canada). A possible explanation for this gap may be worse caries scores in Israel, comparing similar age groups in Finnish and Canadian populations (<xref rid="ref-41" ref-type="bibr">Zusman et al., 2005</xref>; <xref rid="ref-37" ref-type="bibr">World Health Organization, 2000</xref>; <xref rid="ref-34" ref-type="bibr">Sheiham & Sabbah, 2010</xref>). High caries prevalence may lead to higher potential of tooth loss and eventually, more edentulousness.</p><p>Interestingly, in our study only very few participants (12.7%) had any kind of dentures. 71.1% of the total edentulous participants did not have dentures. This finding is relatively high, comparing to previous studies (as 18% in <xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>, and 21% in <xref rid="ref-14" ref-type="bibr">Iglesias Corchero & García Cepeda, 2008</xref>), but we must be cautious interpreting these results.</p><p>Mean number of decayed teeth in our study was 4.17 teeth, and 82.8% were with untreated caries. Arpin et al. found only 1.62 teeth, with 49.3% of elderly with untreated caries (<xref rid="ref-4" ref-type="bibr">Arpin, Brodeur & Corbeil, 2008</xref>). According to the National Health and Nutrition Examination Survey (1999–2004), 23% of 65 year and older seniors have untreated caries and the mean number of decayed teeth was 0.39 teeth for 65–74 year olds and 0.47 for 75 years and above (<xref rid="ref-23" ref-type="bibr">NIDCR, 2014</xref>). Our study showed high prevalence of caries and subsequently many treatment needs among the study population.</p><p>In our study, females had higher number of caries cavitations than males. A similar finding was observed among elderly in other study (<xref rid="ref-12" ref-type="bibr">Hämäläinen et al., 2004</xref>) which found that males had more intact teeth and lower DMF scores than women (<xref rid="ref-12" ref-type="bibr">Hämäläinen et al., 2004</xref>).</p><p>As expected, we found association between number of caries cavitation and low OH. This phenomenon is well known and is re-established in recent studies (<xref rid="ref-13" ref-type="bibr">Hashim, Williams & Thomson, 2013</xref>; <xref rid="ref-9" ref-type="bibr">Dawani et al., 2012</xref>). We also found a statistically significant association between the number of caries cavitation and taking Clonazepam. Clonazepam is a benzodiazepine with many side effects including Xerostomia, which might explain higher numbers of cavitated teeth (<xref rid="ref-1" ref-type="bibr">Abdollahi & Radfar, 2003</xref>).</p><p>Oral hygiene was poor and in line with previous observations among this population (<xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>). Several explanations had been given for the neglect of daily oral hygiene in LTC patients. One of the possibilities was that the nursing workers are not qualified to assist the institutionalized elderly with oral care (<xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>). The poor oral hygiene status urged us to include oral care protocol for the health care personnel, since the current study was part of a comprehensive community intervention program (<xref rid="ref-7" ref-type="bibr">Bilder et al., 2011</xref>).</p><p>Surprisingly, according to the clinical examiner’s impression, very few subjects presented oral mucosal lesions and acute gingivitis. These results were not defined as a direct objective of the study, but the literature presents a high prevalence of oral mucosal lesions among institutionalized elderly (<xref rid="ref-36" ref-type="bibr">Simunković et al., 2005</xref>; <xref rid="ref-29" ref-type="bibr">Rabiei et al., 2010</xref>). A possible explanation for that might be the low percentages (12.6%) from the current study participants who were using their dentures. In addition, most of the participants received anti-inflammatory and/or antibiotic medications. Furthermore, according to the hospital’s infection control protocol, all patients received daily treatment of 0.12% chlorhexidine solutions for cleaning oral cavity. All those treatments may have affected the mucosal and gum health status.</p><p>Prevalence of angular cheilitis was found in similar proportions in the literature (<xref rid="ref-26" ref-type="bibr">Peltola, Vehkalahti & Wuolijoki-Saaristo, 2004</xref>) (14% vs. 19%). However, in the general elderly population including the LTC hospitalized patients, prevalence of angular cheilitis occur in a range of 1–5% (<xref rid="ref-17" ref-type="bibr">Kovac-Kovacic & Skaleric, 2000</xref>; <xref rid="ref-11" ref-type="bibr">Espinoza et al., 2003</xref>; <xref rid="ref-21" ref-type="bibr">Mujica, Rivera & Carrero, 2008</xref>). We assume that our finding of relatively high prevalance was influenced by the high number of patients with nasogastric feeding device, but this specific finding must be investigated later.</p><p>This study has some limitations that one must take into consideration while interpreting the results: the sample was a convenient sample and not a representative of the LTC institutionalized patients in geriatric and psychiatric hospitals in Israel. The majority of the participants had serious complicated medical conditions and were bound to medical devices such as nasogastric feeding (41.8%) or mechanical ventilation (33.1%), which might influence the findings and would explain differences in the results of various studies. Due to the fact that Hertzog Hospital is one of the biggest hospitals and and one of the leaders in treating special needs patients, it hosts the most complicated geriatric and psychiatric patients in Israel. The oral examination was conducted in the hospital beds with very limited access to the oral cavity, while the patients were not always fully cooperative. As a result, it is recommended to use caution when interpreting the results.</p></sec><sec><title>Conclusion</title><p>Oral health among LTC institutionalized patients in a geriatric and psychiatric hospital is poor and the majority of participants had unmet dental treatment needs. Focusing on primary prevention and oral hygiene is recommended by providing daily assistance in oral hygiene procedures. This assistance must be provided by committed health care personnel. More attention should be given to enabling access to dental care among this special population. Further national and international scale studies are needed to expand our knowledge on LTC patients’ dental status and needs. That would allow us to evaluate health care personnel attitudes and performance in order to improve patients’ oral status and quality of life.</p></sec><sec sec-type="supplementary-material" id="supplemental-information"><title>Supplemental Information</title><supplementary-material content-type="local-data" id="supp-1"><object-id pub-id-type="doi">10.7717/peerj.423/supp-1</object-id><label>Supplemental Information</label><caption><title>Data</title></caption><media xlink:href="peerj-02-423-s001.xls"><caption><p>Click here for additional data file.</p></caption></media></supplementary-material></sec></body><back><sec sec-type="additional-information"><title>Additional Information and Declarations</title><fn-group content-type="competing-interests"><title>Competing Interests</title><fn id="conflict-1" fn-type="con"><p>The authors declare there are no competing interests.</p></fn></fn-group><fn-group content-type="author-contributions"><title>Author Contributions</title><fn id="contribution-1" fn-type="con"><p><xref ref-type="contrib" rid="author-1">Leon Bilder</xref> conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.</p></fn><fn id="contribution-2" fn-type="con"><p><xref ref-type="contrib" rid="author-2">Nirit Yavnai</xref> conceived and designed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.</p></fn><fn id="contribution-3" fn-type="con"><p><xref ref-type="contrib" rid="author-3">Avi Zini</xref> conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, reviewed drafts of the paper, statistic.</p></fn></fn-group><fn-group content-type="other"><title>Human Ethics</title><fn id="addinfo-1" fn-type="other"><p>The following information was supplied relating to ethical approvals (i.e., approving body and any reference numbers):</p><p>The study was approved by the Herzog Hospital Jerusalem: 180-10 on 27.7.2010.</p></fn></fn-group></sec><ref-list content-type="authoryear"><title>References</title><ref id="ref-1"><label>Abdollahi & Radfar (2003)</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Abdollahi</surname><given-names>M</given-names></name><name><surname>Radfar</surname><given-names>M</given-names></name></person-group><article-title>A review of drug-induced oral reactions</article-title><source>Journal of Contemporary Dental Practice</source><issue>1</issue><year>2003</year><volume>4</volume><fpage>10</fpage><lpage>31</lpage><pub-id pub-id-type="pmid">12595930</pub-id></element-citation></ref><ref id="ref-2"><label>Abdollahi, Rahimi & Radfar (2008)</label><element-citation publication-type="journal"><person-group person-group-type="author"><name><surname>Abdollahi</surname><given-names>M</given-names></name><name><surname>Rahimi</surname><given-names>R</given-names></name><name><surname>Radfar</surname><given-names>M</given-names></name></person-group><article-title>Current opinion on drug-induced oral reactions: a comprehensive review</article-title><source>Journal of Contemporary Dental Practice</source><issue>3</issue><year>2008</year><volume>9</volume><fpage>1</fpage><lpage>15</lpage><pub-id pub-id-type="pmid">18335114</pub-id></element-citation></ref><ref id="ref-3"><label>Abnet et al. 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