EFFICACY OF BIOFILM DISCLOSING AGENT AND OF THREE BRUSHES IN THE CONTROL OF COMPLETE DENTURE CLEANSING
Identifieur interne : 003001 ( Pmc/Corpus ); précédent : 003000; suivant : 003002EFFICACY OF BIOFILM DISCLOSING AGENT AND OF THREE BRUSHES IN THE CONTROL OF COMPLETE DENTURE CLEANSING
Auteurs : Cláudia Helena Lovato Da Silva ; Helena De Freitas Oliveira ParanhosSource :
- Journal of Applied Oral Science [ 1678-7757 ] ; 2006.
Abstract
This report evaluated the efficacy of three brushes and one biofilm disclosing agent in complete denture cleansing. Methods: Twenty-seven wearers of maxillary dentures were distributed into three groups and received different brushes: Oral B40, conventional toothbrush (Oral B); Denture, denture-specific brush (Condor); Johnson & Johnson, denture-specific brush (Johnson & Johnson). The 60-day experimental period was divided into two techniques: I - brushing (brush associated with a paste - Dentu Creme, Dentco) three times a day; II - brushing and daily application of 1% neutral red on the denture internal surface. Biofilm quantification was carried out weekly and the areas with dye biofilm were obtained by means of Image Tool 2.02 software.
Biofilm removal was more effective during Technique II (Wilcoxon test: p=0.01) for the three groups of brushes. When the brushes were compared in Technique I, the Kruskal Wallis test indicated statistical difference between Denture X Johnson & Johnson and Denture X Oral B40, in which the Denture was more efficient. For Technique II, there was no statistical difference between brushes (p>0.05).
The disclosed application promoted more efficacy on biofilm removal, regardless of the brush used. Denture (Condor) was more efficient than the other brushes during Technique I.
Url:
DOI: 10.1590/S1678-77572006000600012
PubMed: 19089247
PubMed Central: 4327299
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PMC:4327299Le document en format XML
<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">EFFICACY OF BIOFILM DISCLOSING AGENT AND OF THREE BRUSHES IN THE CONTROL OF COMPLETE DENTURE CLEANSING</title><author><name sortKey="Da Silva, Claudia Helena Lovato" sort="Da Silva, Claudia Helena Lovato" uniqKey="Da Silva C" first="Cláudia Helena Lovato" last="Da Silva">Cláudia Helena Lovato Da Silva</name><affiliation><nlm:aff id="aff01">PhD; Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Brazil</nlm:aff></affiliation></author><author><name sortKey="Paranhos, Helena De Freitas Oliveira" sort="Paranhos, Helena De Freitas Oliveira" uniqKey="Paranhos H" first="Helena De Freitas Oliveira" last="Paranhos">Helena De Freitas Oliveira Paranhos</name><affiliation><nlm:aff id="aff02">Associate Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Brazil</nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">19089247</idno><idno type="pmc">4327299</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4327299</idno><idno type="RBID">PMC:4327299</idno><idno type="doi">10.1590/S1678-77572006000600012</idno><date when="2006">2006</date><idno type="wicri:Area/Pmc/Corpus">003001</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">003001</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">EFFICACY OF BIOFILM DISCLOSING AGENT AND OF THREE BRUSHES IN THE CONTROL OF COMPLETE DENTURE CLEANSING</title><author><name sortKey="Da Silva, Claudia Helena Lovato" sort="Da Silva, Claudia Helena Lovato" uniqKey="Da Silva C" first="Cláudia Helena Lovato" last="Da Silva">Cláudia Helena Lovato Da Silva</name><affiliation><nlm:aff id="aff01">PhD; Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Brazil</nlm:aff></affiliation></author><author><name sortKey="Paranhos, Helena De Freitas Oliveira" sort="Paranhos, Helena De Freitas Oliveira" uniqKey="Paranhos H" first="Helena De Freitas Oliveira" last="Paranhos">Helena De Freitas Oliveira Paranhos</name><affiliation><nlm:aff id="aff02">Associate Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Brazil</nlm:aff></affiliation></author></analytic><series><title level="j">Journal of Applied Oral Science</title><idno type="ISSN">1678-7757</idno><idno type="eISSN">1678-7765</idno><imprint><date when="2006">2006</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Objective:</title><p>This report evaluated the efficacy of three brushes and one biofilm disclosing agent in complete denture cleansing. Methods: Twenty-seven wearers of maxillary dentures were distributed into three groups and received different brushes: Oral B40, conventional toothbrush (Oral B); Denture, denture-specific brush (Condor); Johnson & Johnson, denture-specific brush (Johnson & Johnson). The 60-day experimental period was divided into two techniques: I - brushing (brush associated with a paste - Dentu Creme, Dentco) three times a day; II - brushing and daily application of 1% neutral red on the denture internal surface. Biofilm quantification was carried out weekly and the areas with dye biofilm were obtained by means of Image Tool 2.02 software.</p></sec><sec><title>Results:</title><p>Biofilm removal was more effective during Technique II (Wilcoxon test: p=0.01) for the three groups of brushes. When the brushes were compared in Technique I, the Kruskal Wallis test indicated statistical difference between Denture X Johnson & Johnson and Denture X Oral B40, in which the Denture was more efficient. For Technique II, there was no statistical difference between brushes (p>0.05).</p></sec><sec><title>Conclusion:</title><p>The disclosed application promoted more efficacy on biofilm removal, regardless of the brush used. Denture (Condor) was more efficient than the other brushes during Technique I.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Abelson, Dc" uniqKey="Abelson D">DC Abelson</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Ambjornsen, E" uniqKey="Ambjornsen E">E Ambjornsen</name></author><author><name sortKey="Valderhaug, J" uniqKey="Valderhaug J">J Valderhaug</name></author><author><name sortKey="Norheim, Pw" uniqKey="Norheim P">PW Norheim</name></author><author><name sortKey="Floystrand, F" uniqKey="Floystrand F">F Floystrand</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Andruciolli, Mcd" uniqKey="Andruciolli M">MCD Andruciolli</name></author><author><name sortKey="Macedo, Ld" uniqKey="Macedo L">LD Macedo</name></author><author><name sortKey="Lara, Ehg" uniqKey="Lara E">EHG Lara</name></author><author><name sortKey="Panzeri, H" uniqKey="Panzeri H">H 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<front><journal-meta><journal-id journal-id-type="nlm-ta">J Appl Oral Sci</journal-id><journal-id journal-id-type="iso-abbrev">J Appl Oral Sci</journal-id><journal-title-group><journal-title>Journal of Applied Oral Science</journal-title></journal-title-group><issn pub-type="ppub">1678-7757</issn><issn pub-type="epub">1678-7765</issn><publisher><publisher-name>Faculdade de Odontologia de Bauru da Universidade de São Paulo</publisher-name><publisher-loc>Bauru</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">19089247</article-id><article-id pub-id-type="pmc">4327299</article-id><article-id pub-id-type="publisher-id">S1678-77572006000600012</article-id><article-id pub-id-type="doi">10.1590/S1678-77572006000600012</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject></subj-group></article-categories><title-group><article-title>EFFICACY OF BIOFILM DISCLOSING AGENT AND OF THREE BRUSHES IN THE CONTROL OF COMPLETE DENTURE CLEANSING</article-title><trans-title-group xml:lang="pt"><trans-title>EFICÁCIA DE UM EVIDENCIADOR DE BIOFILME E DE TRÊS ESCOVAS NO CONTROLE DA HIGIENE DE PRÓTESES TOTAIS</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name><surname>da Silva</surname><given-names>Cláudia Helena Lovato</given-names></name><xref ref-type="aff" rid="aff01"><sup>1</sup></xref><xref ref-type="corresp" rid="c01"></xref></contrib><contrib contrib-type="author"><name><surname>Paranhos</surname><given-names>Helena de Freitas Oliveira</given-names></name><xref ref-type="aff" rid="aff02"><sup>2</sup></xref><xref ref-type="corresp" rid="c02"></xref></contrib><aff id="aff01"><label>1</label>PhD; Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Brazil</aff><aff id="aff02"><label>2</label>Associate Professor, Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Brazil</aff></contrib-group><author-notes><corresp id="c01"><bold>Corresponding address:</bold> Cláudia Helena Lovato da Silva - Epitácio Pessoa, 781 Center - Sertãozinho, São Paulo, Brazil - CEP: 14170-460 Phone: <phone>(16) 3602-4006 - (16) 3947-2687</phone> - e-mail: <email>chl@forp.usp.br</email></corresp><corresp id="c02">Correspondence should be forwarded to the author: Helena de Freitas Oliveira Paranhos - Avenida do Café, s/n Monte Alegre - Ribeirão Preto, São Paulo - CEP: 14040-904 - Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo, Brazil.</corresp></author-notes><pub-date pub-type="epub-ppub"><month>12</month><year>2006</year></pub-date><pmc-comment>Fake ppub date generated by PMC from publisher
pub-date/@pub-type='epub-ppub' </pmc-comment>
<pub-date pub-type="ppub"><month>12</month><year>2006</year></pub-date><volume>14</volume><issue>6</issue><fpage>454</fpage><lpage>459</lpage><history><date date-type="received"><day>11</day><month>5</month><year>2006</year></date><date date-type="rev-recd"><day>04</day><month>8</month><year>2006</year></date><date date-type="accepted"><day>21</day><month>8</month><year>2006</year></date></history><permissions><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/"><license-p>This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p></license></permissions><abstract><sec><title>Objective:</title><p>This report evaluated the efficacy of three brushes and one biofilm disclosing agent in complete denture cleansing. Methods: Twenty-seven wearers of maxillary dentures were distributed into three groups and received different brushes: Oral B40, conventional toothbrush (Oral B); Denture, denture-specific brush (Condor); Johnson & Johnson, denture-specific brush (Johnson & Johnson). The 60-day experimental period was divided into two techniques: I - brushing (brush associated with a paste - Dentu Creme, Dentco) three times a day; II - brushing and daily application of 1% neutral red on the denture internal surface. Biofilm quantification was carried out weekly and the areas with dye biofilm were obtained by means of Image Tool 2.02 software.</p></sec><sec><title>Results:</title><p>Biofilm removal was more effective during Technique II (Wilcoxon test: p=0.01) for the three groups of brushes. When the brushes were compared in Technique I, the Kruskal Wallis test indicated statistical difference between Denture X Johnson & Johnson and Denture X Oral B40, in which the Denture was more efficient. For Technique II, there was no statistical difference between brushes (p>0.05).</p></sec><sec><title>Conclusion:</title><p>The disclosed application promoted more efficacy on biofilm removal, regardless of the brush used. Denture (Condor) was more efficient than the other brushes during Technique I.</p></sec></abstract><trans-abstract xml:lang="pt"><p>Este trabalho avaliou três escovas e um evidenciador de biofilme na higiene de próteses totais. Vinte e sete usuários de próteses totais superiores foram distribuídos em três grupos que receberam diferentes escovas: Oral B40 para dentes naturais (Oral B); Denture para dentadura (Condor) e Johnson & Johnson para dentadura (Johnson & Johnson). O período experimental de 60 dias foi dividido em 2 Técnicas: I - utilização das escovas associadas a um dentifrício (Dentu-Creme, Dentco) três vezes ao dia; II – escovação e aplicação diária do evidenciador Vermelho neutro a 1% na superfície interna da prótese total. A quantificação do biofilme foi realizada semanalmente e as áreas com biofilme corado foram medidas com o auxílio do software Image Tool 2.02. A remoção do biofilme foi mais efetiva durante a Técnica II (teste de Wilcoxon: p=0.01) nos três grupos. Comparando as escovas, na Técnica I o teste de Kruskal Wallis indicou diferença significante (p=0.05) entre Denture X Johnson & Johnson e Denture X OralB 40, sendo a Denture a mais eficaz. Na Técnica II, as escovas não apresentaram diferença estatisticamente significante (p>0,05). A aplicação do evidenciador promoveu maior eficácia na remoção do biofilme, independentemente da escova utilizada. Na comparação das escovas na Técnica I, a escova Denture foi a mais eficiente.</p></trans-abstract><kwd-group><kwd>Complete denture</kwd><kwd>Biofilm</kwd><kwd>Cleansers</kwd><kwd>Disclosing agent</kwd><kwd>Brushes</kwd></kwd-group><counts><fig-count count="1"></fig-count><table-count count="3"></table-count><equation-count count="0"></equation-count><ref-count count="35"></ref-count><page-count count="6"></page-count></counts></article-meta></front><body><sec sec-type="intro"><title>INTRODUCTION</title><p>Although many reports evaluate the efficacy of denture cleansers, surveys point out that removal of denture biofilm by denture wearers is precarious<xref rid="B01" ref-type="bibr">1</xref>–<xref rid="B03" ref-type="bibr">3</xref>,<xref rid="B05" ref-type="bibr">5</xref>,<xref rid="B06" ref-type="bibr">6</xref>,<xref rid="B23" ref-type="bibr">23</xref>. Deficient patient orientation, inadequate divulgation of specific denture cleanser materials, intrinsic characteristics of prosthetic appliances and deficient manual dexterity of elderly people have been indicated as causes of poor denture hygiene<xref rid="B14" ref-type="bibr">14</xref>,<xref rid="B20" ref-type="bibr">20</xref>,<xref rid="B22" ref-type="bibr">22</xref>,<xref rid="B26" ref-type="bibr">26</xref>. Biofilm removal can be obtained by means of mechanical methods (brushing and ultrasonic devices) associated with chemical methods (alkaline peroxide and hypochlorite, acids, enzymes and disinfectants); among them, brushing is the most common method applied for routine denture biofilm control<xref rid="B01" ref-type="bibr">1</xref>,<xref rid="B02" ref-type="bibr">2</xref>,<xref rid="B17" ref-type="bibr">17</xref>,<xref rid="B19" ref-type="bibr">19</xref>,<xref rid="B35" ref-type="bibr">35</xref>.</p><p>Knowledge on materials and methods for quantification of denture biofilm is an important factor to be considered. While biofilm quantification on natural teeth is significantly studied and published in the literature, its quantification on complete dentures is poorly known, due to the small number of papers published on this matter and because the procedure is not routinely employed by dentists<xref rid="B16" ref-type="bibr">16</xref>,<xref rid="B24" ref-type="bibr">24</xref>,<xref rid="B27" ref-type="bibr">27</xref>,<xref rid="B28" ref-type="bibr">28</xref>.</p><p>With respect to natural teeth, efficient hygiene control in complete dentures can be obtained by an orientation program, correct use of materials and methods available for denture cleansing and by utilization of a biofilm disclosing agent, allowing quantification and localization of biofilm on dentures, which could allow its removal more effectively<xref rid="B05" ref-type="bibr">5</xref>,<xref rid="B08" ref-type="bibr">8</xref>,<xref rid="B12" ref-type="bibr">12</xref>,<xref rid="B16" ref-type="bibr">16</xref>,<xref rid="B24" ref-type="bibr">24</xref>,<xref rid="B26" ref-type="bibr">26</xref>,<xref rid="B28" ref-type="bibr">28</xref>,<xref rid="B31" ref-type="bibr">31</xref>,<xref rid="B35" ref-type="bibr">35</xref><sub>.</sub></p><p>The aim of this study was to evaluate the efficacy of a biofilm disclosing agent associated with three brushes on hygiene control and maintenance in complete dentures.</p></sec><sec><title>MATERIAL AND METHOD</title><p>After research approval by the Institutional Review Board of Ribeirão Preto Dental School - University of São Paulo (no. 2000-136358.0), 27 healthy men and women wearing complete denture (maxillary and mandibular complete dentures) were selected, with approximate mean ages of 50 years, and with no motor deficiency according to the Discipline of Complete Denture of FORP-USP. Patients' maxillary complete dentures were constructed with heat- cured acrylic resin, acrylic teeth, none of them with any break or repair, wearing time ranging from 1 to 3 years and score of biofilm degree of at least 1 (Additive Index 2). Patients were included in the research after being verbally informed, when they read and signed the Consent Term.</p><p>Patients were divided into three groups: Toothbrush (Oral B40 - Service Industry and Commerce Ltd., São Paulo, São Paulo, Brazil); Denture brush (Johnson & Johnson - Johnson & Johnson, São Paulo, Brazil); and Denture brush (Denture - Condor S.A., Santa Catarina, Brazil). For all groups, a specific denture paste (Dentu-Creme, Dentco, Inc. Jersey City, USA) was used as an auxiliary brushing agent.</p><p>Two hygiene techniques were indicated for all groups; technique I: the subjects were instructed to brush their dentures three times a day, rinsing their mouth with water after brushing and keeping the denture immersed in water overnight; technique II: the instruction was to brush the denture 3 times a day associated with the use of a disclosing agent (1% neutral red) to the last brushing of the day; in this technique, patients were also instructed to rinse their mouth with water after brushing and to keep the denture immersed in water overnight.</p><p>Patients received verbal information and practical demonstration of both techniques. After the patients had received instructions and hygiene materials, they were assessed by the investigators, who performed disclosure of the internal surface of maxillary dentures with 1% neutral red solution. The investigator brushed the disclosed dentures until complete removal of the disclosed biofilm (biofilm-free). At first, technique I was employed by all patients for 3 weeks; after this period, the investigator accomplished complete denture biofilm removal by brushing (biofilm-free) and then technique II was employed by all patients for further 3 weeks.</p><p>During each technique, the patients attended weekly returns when the maxillary denture was removed, rinsed with running water (5 seconds) and air-dried (10 seconds). Afterwards, the disclosing agent (1% neutral red) was applied on the internal surface with a cotton swab and the denture was rinsed and dried again. The disclosed surfaces were photographed (digital camera, Coolpix, Nikon, Melville, N.Y., USA) with standardized film-object distance and exposure time. The camera was fixed on a stand (CS-4 Copy Stand Testrite, Newark, NJ, USA) at 90° to the internal denture surface. After photographing, dentures were brushed with Denture brush, in order to perform full biofilm removal, and then returned to the patients.</p><p>The photographs were transferred to a computer. Biofilm quantification was performed at the end of each hygiene technique by a computerized method. By this method, the total internal surface of the denture and biofilm-covered areas were measured using the Image Tool software (Windows, version 2.02, UTHSC, San Antonio). The percentages of biofilm coverage areas were calculated as the ratio between disclosed areas and the area of denture's internal surface multiplied by 100. Three measurements were performed (one for each visit) of biofilm degree for each treatment (I and II).</p><p>Preliminary normality and homogeneity tests applied to the results showed no normal distribution; therefore, the Wilcoxon test was employed to compare the effectiveness of both techniques for each brush group; the Kruskal Wallis test was employed to compare the effectiveness of brushes. These tests were applied to the average of biofilm percentage for each denture in each treatment (3 measurements).</p></sec><sec sec-type="results"><title>RESULTS</title><p><xref ref-type="table" rid="t01">Table 1</xref> shows the mean of three measurements of biofilm percentage on the internal surface of the evaluated complete dentures and the sum of means.</p><table-wrap id="t01" orientation="portrait" position="float"><label>TABLE 1</label><caption><title>Means of disclosed biofilm percentages on the internal surface of the evaluated complete dentures and sum of means</title></caption><table frame="hsides" rules="groups"><colgroup width="14%" 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></colgroup><thead style="border-top: thin solid; border-bottom: thin solid; border-color: #000000"><tr><th align="left" rowspan="2" colspan="1"></th><th align="center" colspan="2" rowspan="1">Ora B40</th><th align="center" colspan="2" rowspan="1">Johnson & Johnson</th><th align="center" colspan="2" rowspan="1">Denture</th></tr><tr><th align="center" rowspan="1" colspan="1">Technique I</th><th align="center" rowspan="1" colspan="1">Technique II</th><th align="center" rowspan="1" colspan="1">Technique I</th><th align="center" rowspan="1" colspan="1">Technique II</th><th align="center" rowspan="1" colspan="1">Technique I</th><th align="center" rowspan="1" colspan="1">Technique II</th></tr></thead><tbody style="border-bottom: thin solid; border-color: #000000"><tr><td align="left" rowspan="9" valign="top" colspan="1">Mean %</td><td align="center" rowspan="1" colspan="1">5</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">3</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">0</td></tr><tr><td align="center" rowspan="1" colspan="1">17</td><td align="center" rowspan="1" colspan="1">7</td><td align="center" rowspan="1" colspan="1">2</td><td align="center" rowspan="1" colspan="1">1</td><td align="center" rowspan="1" colspan="1">2</td><td align="center" rowspan="1" colspan="1">0</td></tr><tr><td align="center" rowspan="1" colspan="1">10</td><td align="center" rowspan="1" colspan="1">3</td><td align="center" rowspan="1" colspan="1">9</td><td align="center" rowspan="1" colspan="1">3</td><td align="center" rowspan="1" colspan="1">3</td><td align="center" rowspan="1" colspan="1">0</td></tr><tr><td align="center" rowspan="1" colspan="1">3</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">2</td><td align="center" rowspan="1" colspan="1">1</td><td align="center" rowspan="1" colspan="1">3</td><td align="center" rowspan="1" colspan="1">0</td></tr><tr><td align="center" rowspan="1" colspan="1">1</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">1</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">1</td><td align="center" rowspan="1" colspan="1">0</td></tr><tr><td align="center" rowspan="1" colspan="1">1</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">9</td><td align="center" rowspan="1" colspan="1">5</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">0</td></tr><tr><td align="center" rowspan="1" colspan="1">2</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">10</td><td align="center" rowspan="1" colspan="1">6</td><td align="center" rowspan="1" colspan="1">19</td><td align="center" rowspan="1" colspan="1">5</td></tr><tr><td align="center" rowspan="1" colspan="1">1</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">1</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">0</td><td align="center" rowspan="1" colspan="1">0</td></tr><tr><td align="center" rowspan="1" colspan="1">5</td><td align="center" rowspan="1" colspan="1">1</td><td align="center" rowspan="1" colspan="1">12</td><td align="center" rowspan="1" colspan="1">2</td><td align="center" rowspan="1" colspan="1">4</td><td align="center" rowspan="1" colspan="1">3</td></tr><tr><td align="left" rowspan="1" colspan="1">∑</td><td align="center" rowspan="1" colspan="1">45</td><td align="center" rowspan="1" colspan="1">11</td><td align="center" rowspan="1" colspan="1">49</td><td align="center" rowspan="1" colspan="1">18</td><td align="center" rowspan="1" colspan="1">32</td><td align="center" rowspan="1" colspan="1">8</td></tr></tbody></table></table-wrap><p><xref ref-type="table" rid="t02">Table 2</xref> shows the statistical significance between techniques I and II (Wilcoxon Test).</p><table-wrap id="t02" orientation="portrait" position="float"><label>TABLE 2</label><caption><title>Statistical difference (Wilcoxon test) between techniques I and II</title></caption><table frame="hsides" rules="groups"><colgroup width="33%" span="1"><col span="1"></col><col span="1"></col><col span="1"></col></colgroup><thead style="border-top: thin solid; border-bottom: thin solid; border-color: #000000"><tr><th align="left" rowspan="1" colspan="1">Brushes</th><th align="center" rowspan="1" colspan="1">Z calculated</th><th align="center" rowspan="1" colspan="1">Significance<break></break>Technique I X Technique II</th></tr></thead><tbody style="border-bottom: thin solid; border-color: #000000"><tr><td align="left" rowspan="1" colspan="1">Oral B40</td><td align="center" rowspan="1" colspan="1">2.70</td><td align="center" rowspan="1" colspan="1">1% (p<0.01)</td></tr><tr><td align="left" rowspan="1" colspan="1">Johnson & Johnson</td><td align="center" rowspan="1" colspan="1">2.70</td><td align="center" rowspan="1" colspan="1">1% (p<0.01)</td></tr><tr><td align="left" rowspan="1" colspan="1">Denture</td><td align="center" rowspan="1" colspan="1">2.20</td><td align="center" rowspan="1" colspan="1">5% (p<0.05)</td></tr></tbody></table></table-wrap><p><xref ref-type="table" rid="t03">Table 3</xref> shows the results of Kruskal Wallis test applied to the means (%) shown in Table I; this test performs comparisons between brush groups with both techniques.</p><table-wrap id="t03" orientation="portrait" position="float"><label>TABLE 3</label><caption><title>Statistical significance, among brushes, for each technique (Kruskal Wallis test)</title></caption><table frame="hsides" rules="groups"><colgroup width="20%" span="1"><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col><col span="1"></col></colgroup><thead style="border-top: thin solid; border-bottom: thin solid; border-color: #000000"><tr><th align="left" rowspan="2" colspan="1">Brushes</th><th align="center" colspan="2" rowspan="1">Difference between μ</th><th align="center" colspan="2" rowspan="1">Significance</th></tr><tr><th align="center" rowspan="1" colspan="1">Technique I</th><th align="center" rowspan="1" colspan="1">Technique II</th><th align="center" rowspan="1" colspan="1">Technique I</th><th align="center" rowspan="1" colspan="1">Technique II</th></tr></thead><tbody style="border-bottom: thin solid; border-color: #000000"><tr><td align="left" rowspan="1" colspan="1">OralB40 X Johnson & Johnson</td><td align="center" rowspan="1" colspan="1">2.90</td><td align="center" rowspan="1" colspan="1">1.90</td><td align="center" rowspan="1" colspan="1">Ns (p>0.05)</td><td align="center" rowspan="1" colspan="1">Ns</td></tr><tr><td align="left" rowspan="1" colspan="1">OralB40 X Denture</td><td align="center" rowspan="1" colspan="1">4.60</td><td align="center" rowspan="1" colspan="1">3.40</td><td align="center" rowspan="1" colspan="1">5% (p=0.05)</td><td align="center" rowspan="1" colspan="1">Ns</td></tr><tr><td align="left" rowspan="1" colspan="1">Johnson & Johnson X Denture</td><td align="center" rowspan="1" colspan="1">7.40</td><td align="center" rowspan="1" colspan="1">5.30</td><td align="center" rowspan="1" colspan="1">5% (p=0.05)</td><td align="center" rowspan="1" colspan="1">Ns</td></tr></tbody></table><table-wrap-foot><fn id="TFN01t03"><p>(Ns): non-significant</p></fn></table-wrap-foot></table-wrap><p><xref ref-type="fig" rid="f01">Figure 1</xref> shows the comparison between the sum of means obtained for three brushes in each technique, and compares the techniques with each other</p><fig id="f01" orientation="portrait" position="float"><label>FIGURE 1</label><caption><title>Comparison of the sum of means (%) for 3 brushes in each technique and comparison of techniques</title></caption><graphic xlink:href="1678-7757-jaos-14-06-0454-gf01"></graphic></fig></sec><sec sec-type="discussion"><title>DISCUSSION</title><p>The relationship between denture biofilm, mucosal inflammation and Atrophic Chronic Candidiasis has been discussed along the years; there is confirmation that cleansing can help to control or solve the inflammatory conditions of the mucosa by reducing the degree of denture biofilm. Nevertheless, several studies call attention to the precarious oral health of complete denture wearers<xref rid="B01" ref-type="bibr">1</xref>,<xref rid="B05" ref-type="bibr">5</xref>,<xref rid="B11" ref-type="bibr">11</xref>,<xref rid="B16" ref-type="bibr">16</xref>,<xref rid="B17" ref-type="bibr">17</xref>,<xref rid="B19" ref-type="bibr">19</xref>,<xref rid="B23" ref-type="bibr">23</xref>,<xref rid="B34" ref-type="bibr">34</xref>. The toothbrush is the most important element in any hygiene program and in complete denture hygiene control; brushing is the most common and routine method employed in association with paste as an auxiliary agent.</p><p>Some studies have shown that toothbrushes (conventional brushes) can cause wear on the denture materials and do not provide adequate hygiene, since their design is inappropriate to reach the entire denture surfaces (internal and external)<xref rid="B07" ref-type="bibr">7</xref>,<xref rid="B09" ref-type="bibr">9</xref>,<xref rid="B32" ref-type="bibr">32</xref>,<xref rid="B33" ref-type="bibr">33</xref>. Such materials are customarily found in other countries, but in the Brazilian market there is only a limited number of specific denture products; as a result, denture wearers make use of conventional brushes to clean their dentures.</p><p>Studies regarding natural teeth hygiene emphasize the importance of incentive programs on the control of biofilm formation and many of these indicate home use of disclosing agents as additional means to brushing<xref rid="B14" ref-type="bibr">14</xref>,<xref rid="B16" ref-type="bibr">16</xref>,<xref rid="B25" ref-type="bibr">25</xref>. In the reviews, there are many disclosing agents for natural teeth. However, few solutions are indicated for complete dentures. Complete denture studies indicate the use of these solutions only to quantitatively and qualitatively evaluate the denture biofilm<xref rid="B02" ref-type="bibr">2</xref>,<xref rid="B03" ref-type="bibr">3</xref>,<xref rid="B04" ref-type="bibr">4</xref>,<xref rid="B12" ref-type="bibr">12</xref>,<xref rid="B17" ref-type="bibr">17</xref>,<xref rid="B22" ref-type="bibr">22</xref>,<xref rid="B24" ref-type="bibr">24</xref>,<xref rid="B28" ref-type="bibr">28</xref> as a mean to evaluate hygiene products.</p><p>Therefore, it is necessary compare the effectiveness of brushes that are available in the Brazilian market, looking for their viable association with alternative methods, as well as using a disclosing agent to make biofilm removal easier and more effective.</p><p>Oral B toothbrush (conventional) has established good acceptance and regularity in the Brazilian market along the years. It is composed of 41 soft bristles positioned perpendicularly at the same side of brush's head, which has an oval design. This configuration allows easier and better adaptation to the denture internal surface. The toothbrush has a long anatomic handle that provides a firm grasp.</p><p>The Johnson & Johnson brush was designed by Paranhos, et al.<xref rid="B30" ref-type="bibr">30</xref> (2000) to evaluate a specific dentifrice on the control of Atrophic Chronic Candidiasis in denture wearers. It has 26 tufts with 16-mm long bristles positioned at the same side of the brush's head. The longer length makes the bristles become extra-soft and provides a better range to reach the denture areas. The handle is long with no anatomic feature.</p><p>The denture brush has a long handle, the head is elongated and has two groups of soft bristles positioned at each side of the head. One of them is more compact with a wedge-like form and is positioned on the extremity of the head. This bristle displays an anterior angulation and is designed to perform brushing on the internal surface of denture. The other group has a larger number of bristles, positioned perpendicular to the head covering its full extension and is designed to perform brushing on the denture's external surface.</p><p>With regard to the biofilm quantification method on complete dentures, disclosure is the most employed method in the literature and is customarily associated with the score attribution method (Index). Nevertheless, some components of this methodology allow variations in results when utilized by different examiners.</p><p>In this study, the biofilm quantification methodology was based on utilization of disclosed surfaces and a computerized method (Image Toll 2.02) to quantify biofilm. The Image Tool 2.02 program was employed to obtain final results, since this method supplies numerical data that avoid percentage calculations of the biofilm coverage area. Assessment was performed on the internal denture surface, since it is the area most often used to evaluate cleanser efficacy.</p><p>Lovato, et al.<xref rid="B21" ref-type="bibr">21</xref> (2000), studying clinical manipulation of a disclosing agent, highlighted the fact that this agent must have the ability to disclose biofilm, be easy to remove from the denture, and not stain the denture after removal. These authors indicated 1% neutral red, 1% Sodium Fluorescein, Replak and 1% Monosulphate Proflavim as disclosing agent.</p><p>The 60-day experimental period was divided between Technique I (brushing) and Technique II (brushing and disclose home application). Before starting Technique I, the denture was disclosed and the biofilm was fully removed by brushing (Denture-Brush-Condor; Dentu-Crème, Dentco) by the investigator. At this moment, the biofilm was photographed, because it was not the purpose of this study to evaluate the improvement of denture hygiene related to the patients' hygiene habits, but rather to evaluate the efficacy of techniques I and II used in this study in association with different brushes.</p><p>All 3 brush groups started the experiment with technique I, which was employed for 3 weeks. After the end of Technique I, the patients were instructed to return to their habitual hygiene for 15 days so that the investigator could repeat disclosing and brushing of the maxillary complete dentures, to provide full biofilm removal (biofilm-free) before initiation of Technique II (3 weeks). This 15-day interval was important to reduce the influence from one technique on the other.</p><p>Throughout the entire experimental period, the patients returned weekly for biofilm quantification, since 7 days is an appropriate period for new biofilm deposition and to allow for good patient control. The 1% Neutral Red was selected due to its good affinity with biofilm, removal efficacy from denture surface and because it does not damage the denture components (teeth and base).</p><p>Regarding the efficacy of brushes during Technique II, no significant difference was found among the three groups. These results indicate that it is not necessary to use a specific brush when an auxiliary agent for biofilm identification was employed prior to brushing. By using disclosing, all brushes proved to be efficient. This can be explained by the fact that disclosure promoted biofilm visualization by the patient <xref rid="B05" ref-type="bibr">5</xref>,<xref rid="B18" ref-type="bibr">18</xref>,<xref rid="B20" ref-type="bibr">20</xref>,<xref rid="B25" ref-type="bibr">25</xref>. In agreement with Kipot, et al.<xref rid="B18" ref-type="bibr">18</xref> (1984), it is essential that patients be instructed, trained and motivated to continue adequate oral hygiene.</p><p>The increase in life expectancy of the Brazilian population further increases the needs of edentate patients. This study aimed at contributing with maintenance of patients' health, since there is direct association between denture biofilm control and associated pathologies as Chronic Atrophic Candidiasis.</p></sec><sec sec-type="conclusions"><title>CONCLUSION</title><p>Home use of a disclosing agent improved biofilm control in dentures for all 3 groups of brushes. Denture brush was more effective than the others in Technique I, while there was no difference among brushes in Technique II. Therefore, without the use of a disclosing biofilm agent, a specific brush for denture hygiene should be indicated. 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