A clinical study of the relationship between diabetes mellitus and periodontal disease
Identifieur interne : 003187 ( Pmc/Corpus ); précédent : 003186; suivant : 003188A clinical study of the relationship between diabetes mellitus and periodontal disease
Auteurs : Neelima S. Rajhans ; Ramesh M. Kohad ; Viren G. Chaudhari ; Nilkanth H. MhaskeSource :
- Journal of Indian Society of Periodontology [ 0972-124X ] ; 2011.
Abstract
The relationship between diabetes mellitus and periodontal disease is not clear, even though studied intensively. From the available data, it seemed reasonable to believe that diabetics were more susceptible to periodontal disease than non.diabetics.
The present study was to clinically evaluate the relationship of diabetes mellitus with periodontal disease along with various parameters.
Fifteen hundred patients with diabetes mellitus were examined. A thorough oral examination was carried out and relevant history was recorded for all the patients.
Results indicated that the prevalence of periodontal disease in diabetic patients was 86.8%.
It can be concluded that poorer the glycemic control, and longer the duration of diabetes, the greater will be the prevalence and severity of periodontal disease.
Url:
DOI: 10.4103/0972-124X.92576
PubMed: 22368365
PubMed Central: 3283938
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<record><TEI><teiHeader><fileDesc><titleStmt><title xml:lang="en">A clinical study of the relationship between diabetes mellitus and periodontal disease</title><author><name sortKey="Rajhans, Neelima S" sort="Rajhans, Neelima S" uniqKey="Rajhans N" first="Neelima S." last="Rajhans">Neelima S. Rajhans</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Kohad, Ramesh M" sort="Kohad, Ramesh M" uniqKey="Kohad R" first="Ramesh M." last="Kohad">Ramesh M. Kohad</name><affiliation><nlm:aff id="aff2"><italic>Department of Periodontics, Saraswati - Dhanwantari Dental College & Hospital, Parabhani, Maharashtra, India</italic></nlm:aff></affiliation></author><author><name sortKey="Chaudhari, Viren G" sort="Chaudhari, Viren G" uniqKey="Chaudhari V" first="Viren G." last="Chaudhari">Viren G. Chaudhari</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Mhaske, Nilkanth H" sort="Mhaske, Nilkanth H" uniqKey="Mhaske N" first="Nilkanth H." last="Mhaske">Nilkanth H. Mhaske</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">PMC</idno><idno type="pmid">22368365</idno><idno type="pmc">3283938</idno><idno type="url">http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3283938</idno><idno type="RBID">PMC:3283938</idno><idno type="doi">10.4103/0972-124X.92576</idno><date when="2011">2011</date><idno type="wicri:Area/Pmc/Corpus">003187</idno><idno type="wicri:explorRef" wicri:stream="Pmc" wicri:step="Corpus" wicri:corpus="PMC">003187</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">A clinical study of the relationship between diabetes mellitus and periodontal disease</title><author><name sortKey="Rajhans, Neelima S" sort="Rajhans, Neelima S" uniqKey="Rajhans N" first="Neelima S." last="Rajhans">Neelima S. Rajhans</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Kohad, Ramesh M" sort="Kohad, Ramesh M" uniqKey="Kohad R" first="Ramesh M." last="Kohad">Ramesh M. Kohad</name><affiliation><nlm:aff id="aff2"><italic>Department of Periodontics, Saraswati - Dhanwantari Dental College & Hospital, Parabhani, Maharashtra, India</italic></nlm:aff></affiliation></author><author><name sortKey="Chaudhari, Viren G" sort="Chaudhari, Viren G" uniqKey="Chaudhari V" first="Viren G." last="Chaudhari">Viren G. Chaudhari</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Mhaske, Nilkanth H" sort="Mhaske, Nilkanth H" uniqKey="Mhaske N" first="Nilkanth H." last="Mhaske">Nilkanth H. Mhaske</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author></analytic><series><title level="j">Journal of Indian Society of Periodontology</title><idno type="ISSN">0972-124X</idno><idno type="eISSN">0975-1580</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>The relationship between diabetes mellitus and periodontal disease is not clear, even though studied intensively. From the available data, it seemed reasonable to believe that diabetics were more susceptible to periodontal disease than non.diabetics.</p><sec id="st1"><title>Aim:</title><p>The present study was to clinically evaluate the relationship of diabetes mellitus with periodontal disease along with various parameters.</p></sec><sec id="st2"><title>Materials and Methods:</title><p>Fifteen hundred patients with diabetes mellitus were examined. A thorough oral examination was carried out and relevant history was recorded for all the patients.</p></sec><sec id="st3"><title>Results:</title><p>Results indicated that the prevalence of periodontal disease in diabetic patients was 86.8%.</p></sec><sec id="st4"><title>Conclusion:</title><p>It can be concluded that poorer the glycemic control, and longer the duration of diabetes, the greater will be the prevalence and severity of periodontal disease.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct><analytic><author><name sortKey="Carranza, Fa" uniqKey="Carranza F">FA Carranza</name></author><author><name sortKey="Newman, Mg" uniqKey="Newman M">MG Newman</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Schluger, S" uniqKey="Schluger S">S Schluger</name></author><author><name sortKey="Yuodelis, R" uniqKey="Yuodelis R">R Yuodelis</name></author><author><name sortKey="Page, Rc" uniqKey="Page R">RC 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<front><journal-meta><journal-id journal-id-type="nlm-ta">J Indian Soc Periodontol</journal-id><journal-id journal-id-type="publisher-id">JISP</journal-id><journal-title-group><journal-title>Journal of Indian Society of Periodontology</journal-title></journal-title-group><issn pub-type="ppub">0972-124X</issn><issn pub-type="epub">0975-1580</issn><publisher><publisher-name>Medknow Publications & Media Pvt Ltd</publisher-name><publisher-loc>India</publisher-loc></publisher></journal-meta><article-meta><article-id pub-id-type="pmid">22368365</article-id><article-id pub-id-type="pmc">3283938</article-id><article-id pub-id-type="publisher-id">JISP-15-388</article-id><article-id pub-id-type="doi">10.4103/0972-124X.92576</article-id><article-categories><subj-group subj-group-type="heading"><subject>Original Article</subject></subj-group></article-categories><title-group><article-title>A clinical study of the relationship between diabetes mellitus and periodontal disease</article-title></title-group><contrib-group><contrib contrib-type="author"><name><surname>Rajhans</surname><given-names>Neelima S.</given-names></name><xref ref-type="aff" rid="aff1"></xref><xref ref-type="corresp" rid="cor1"></xref></contrib><contrib contrib-type="author"><name><surname>Kohad</surname><given-names>Ramesh M.</given-names></name><xref ref-type="aff" rid="aff2">1</xref></contrib><contrib contrib-type="author"><name><surname>Chaudhari</surname><given-names>Viren G.</given-names></name><xref ref-type="aff" rid="aff1"></xref></contrib><contrib contrib-type="author"><name><surname>Mhaske</surname><given-names>Nilkanth H.</given-names></name><xref ref-type="aff" rid="aff1"></xref></contrib></contrib-group><aff id="aff1"><italic>Department of Periodontics, Y.C.M.M. and R.D.F's., Dental College, Vadgaon Gupta, Ahmednagar, India</italic></aff><aff id="aff2"><label>1</label><italic>Department of Periodontics, Saraswati - Dhanwantari Dental College & Hospital, Parabhani, Maharashtra, India</italic></aff><author-notes><corresp id="cor1"><bold>Address for correspondence:</bold> Dr. Rajhans S. Neelima , “Chhand”, Plot No. 8, Samartha Nagar, Behind Sagar Hotel, Pipeline Road, Savedi, Ahmednagar, Maharashtra 414 003, India. E-mail: <email xlink:href="drshripadraj@gmail.com">drshripadraj@gmail.com</email></corresp></author-notes><pub-date pub-type="ppub"><season>Oct-Dec</season><year>2011</year></pub-date><volume>15</volume><issue>4</issue><fpage>388</fpage><lpage>392</lpage><history><date date-type="received"><day>21</day><month>1</month><year>2011</year></date><date date-type="accepted"><day>30</day><month>11</month><year>2011</year></date></history><permissions><copyright-statement>Copyright: © Journal of Indian Society of Periodontology</copyright-statement><copyright-year>2011</copyright-year><license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc-sa/3.0"><license-p>This is an open-access article distributed under the terms of the Creative Commons Attribution-Noncommercial-Share Alike 3.0 Unported, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.</license-p></license></permissions><abstract><p>The relationship between diabetes mellitus and periodontal disease is not clear, even though studied intensively. From the available data, it seemed reasonable to believe that diabetics were more susceptible to periodontal disease than non.diabetics.</p><sec id="st1"><title>Aim:</title><p>The present study was to clinically evaluate the relationship of diabetes mellitus with periodontal disease along with various parameters.</p></sec><sec id="st2"><title>Materials and Methods:</title><p>Fifteen hundred patients with diabetes mellitus were examined. A thorough oral examination was carried out and relevant history was recorded for all the patients.</p></sec><sec id="st3"><title>Results:</title><p>Results indicated that the prevalence of periodontal disease in diabetic patients was 86.8%.</p></sec><sec id="st4"><title>Conclusion:</title><p>It can be concluded that poorer the glycemic control, and longer the duration of diabetes, the greater will be the prevalence and severity of periodontal disease.</p></sec></abstract><kwd-group><kwd>Glycemic control</kwd><kwd>prevalence</kwd><kwd>duration</kwd><kwd>severity
</kwd></kwd-group></article-meta></front><body><sec id="sec1-1"><title>INTRODUCTION</title><p>Gingival and periodontal diseases, in their various forms, have afflicted mankind since the dawn of history. Diseases of the periodontium occur in childhood, adolescence, and early adulthood but the prevalence of periodontal disease, tissue destruction and tooth loss increases with age.[<xref ref-type="bibr" rid="ref1">1</xref>]</p><p>Apart from age, the factors such as immediate environment of the periodontium and systemic factors, resulting from the general condition of the patient are responsible for the periodontal disease. Diabetes mellitus deserves a special consideration in any comprehensive text of periodontal diseases. Diabetes mellitus affects many people, as does periodontitis, and is found with increasing frequency as people get older as is periodontitis.[<xref ref-type="bibr" rid="ref2">2</xref>]</p><p>Diabetes mellitus is a complicated metabolic disorder characterized by hypofunction or lack of function of the beta cells of the islets of langerhans in the pancreas, leading to high blood glucose levels and excretion of sugar in the urine.[<xref ref-type="bibr" rid="ref3">3</xref>] Diabetes is the commonest among metabolic disorders and its incidence is on the increase all over the world.[<xref ref-type="bibr" rid="ref4">4</xref>] It affects 2 to 10% of the human population.[<xref ref-type="bibr" rid="ref5">5</xref>]</p><p>Periodontal disease has been labeled as the “Sixth Complication” of diabetes.[<xref ref-type="bibr" rid="ref6">6</xref>] However, there is no unanimity about the exact relationship between diabetes mellitus and occurrence of periodontal disease. Opinions still differ regarding the correlation of diabetes and periodontal disease. Regarding the influence of diabetes on periodontium, there are two schools of thought.</p><p>One school of thought has reported increased severity of periodontal disease in diabetics not related to increased local irritants. According to them angiopathy, abnormal collagen metabolism, abnormal polymorphonuclear cell (PMN) function, and altered sulcular microbial flora are found in close association with the severity of periodontitis in diabetic patients. These factors reduce the defensive capacity of tissues and may disturb the tissue response to local irritants.[<xref ref-type="bibr" rid="ref7">7</xref>–<xref ref-type="bibr" rid="ref10">10</xref>]</p><p>Another school of thought recognizes no relationship between diabetes and periodontal disease and maintains that, when two conditions exist together, it is a coincidence rather than a specific cause and effect relationship. According to them, the distribution and severity of local irritants affect the severity of periodontal disease in diabetics.[<xref ref-type="bibr" rid="ref11">11</xref>–<xref ref-type="bibr" rid="ref13">13</xref>]</p><p>As there is a difference of opinion about the cause and effect relationship between diabetes and periodontal disease, it was thought to study the same to resolve the difference of opinion by carrying out the study on larger patient population and applying various periodontal parameters and diabetic variables.</p><sec id="sec2-1"><title>Objectives</title><p>The study was undertaken in diabetic patients with the following objectives.</p><p><list list-type="order"><list-item><p>To find out prevalence and severity of periodontal disease.</p></list-item><list-item><p>To determine age and sex influence on the prevalence and severity of periodontal disease.</p></list-item><list-item><p>To evaluate the relationship between the diabetes mellitus and periodontal disease in terms of plaque and calculus.</p></list-item><list-item><p>To evaluate the relationship between duration of diabetes and prevalence and severity of periodontal disease.</p></list-item><list-item><p>To investigate the association between glycemic status of diabetics and prevalence and severity of periodontal disease.</p></list-item><list-item><p>To study the effect of glycemic status of diabetics on tooth mobility.</p></list-item><list-item><p>To find out effect of diabetes mellitus on loss of teeth.</p></list-item></list></p></sec></sec><sec sec-type="materials|methods" id="sec1-2"><title>MATERIALS AND METHODS</title><p>The study was carried out in multiple hospitals. A total of 1500 patients were selected from Out Patient Department of Periodontics, Government Dental College and Hospital, the Diabetic Clinic, Government Medical College and Hospital, and Diabetes Care and Research Center at Aurangabad. These patients were diagnosed as having diabetes mellitus and were under treatment. The patients were selected by the following inclusion criteria:</p><p><list list-type="order"><list-item><p>Under treatment or had diabetes mellitus diagnosed for at least last one year or more.</p></list-item><list-item><p>Not having any other systemic diseases.</p></list-item><list-item><p>Not having any history of diabetic complications like neuropathy, nephropathy, retinopathy etc.</p></list-item><list-item><p>Not using drugs such as phenytoin, nephidipine etc.</p></list-item><list-item><p>Not undergone any periodontal treatment since last one year.</p></list-item><list-item><p>Willingness to participate in the study.</p></list-item></list></p><p>The relevant history was recorded for all the patients. A careful oral examination was carried out with the help of mouth mirror and graduated periodontal probe. Ramfjords periodontal disease index having components for plaque, calculus and disease severity and Miller's mobility index were recorded for each patient.</p><sec id="sec2-2"><title>Determination of blood glucose levels</title><p>In all the patients, venous blood was collected under strict aseptic conditions, after an overnight fast and one and half hour after meal. The fasting and postprandial blood glucose levels were determined by autoanalyzer.</p></sec></sec><sec id="sec1-3"><title>RESULTS</title><p>Of the 1500 patients, 3.4% of patients had insulin-dependent diabetes mellitus (IDDM) and 96.6% had non-insulin-dependent diabetes mellitus (NIDDM). The collected data was analyzed statistically. Karl Pearson correlation coefficient analysis was used to investigate the relationship between prevalence and severity of periodontal disease and various other factors such as age, sex, glycemic status, and duration of diabetes mellitus.</p><p>Out of 1500 patients, 751 (50.1%) were male and 749 (49.9%) were female. The age range of the patients was 15 years to 76 years with a mean age of 53.24±11.91 years. The patients were classified into five groups as shown in <xref ref-type="table" rid="T1">Table 1</xref>.</p><table-wrap id="T1" position="float"><label>Table 1</label><caption><p>Distribution of patients according to age and sex</p></caption><graphic xlink:href="JISP-15-388-g001"></graphic></table-wrap><sec id="sec2-3"><title>Prevalence and severity of periodontal disease and the effect of patients’ age and sex on it</title><p>Analysis of the data showed that the prevalence of periodontal disease in diabetic patients was 86.8% (gingivitis 27.3% and periodontitis 59.5%) and complete edentulousness was 10.7%. Remaining 2.5% of patients’ were periodontally healthy [<xref ref-type="fig" rid="F1">Figure 1</xref>].</p><fig id="F1" position="float"><label>Figure 1</label><caption><p>Pie diagram showing periodontal status of diabetes mellitus patients (%)</p></caption><graphic xlink:href="JISP-15-388-g002"></graphic></fig><p>The prevalence of periodontal disease was almost equal in both the sexes, male and female; gingivitis, 28.1% in male and 26.4% in female [<xref ref-type="fig" rid="F2">Figure 2</xref>]; periodontitis, 59.4% in male and 59.5% in female [<xref ref-type="fig" rid="F3">Figure 3</xref>]. Mean periodontal disease index score was 3.52±1.96. It was lowest in group I and highest in group V [<xref ref-type="table" rid="T2">Table 2</xref>]. Pearson analysis indicated statistically significant (<italic>P</italic><0.01) correlation of age, but not the sex, with the prevalence and severity of periodontal disease.</p><fig id="F2" position="float"><label>Figure 2</label><caption><p>Prevalence of gingivitis according to age and sex</p></caption><graphic xlink:href="JISP-15-388-g003"></graphic></fig><fig id="F3" position="float"><label>Figure 3</label><caption><p>Prevalence of periodontitis according to age and sex</p></caption><graphic xlink:href="JISP-15-388-g004"></graphic></fig><table-wrap id="T2" position="float"><label>Table 2</label><caption><p>Severity of periodontal disease according to age groups</p></caption><graphic xlink:href="JISP-15-388-g005"></graphic></table-wrap></sec><sec id="sec2-4"><title>Plaque and calculus index</title><p>The mean plaque and calculus index scores were 1.22±0.55 and 1.27±0.60, respectively. There was a statistically significant correlation (<italic>P</italic><0.01) of plaque and calculus index with severity, but not with the prevalence of periodontal disease.</p></sec><sec id="sec2-5"><title>Duration of diabetes mellitus</title><p>The mean duration of diabetes mellitus was 7.99±4.63 years [<xref ref-type="table" rid="T3">Table 3</xref>]. It was 3.06±1.81, when periodontal disease index score was 1, and 12.79±3.42, when the maximum score was 6. The duration of diabetes mellitus was statistically correlated (<italic>P</italic><0.01) with the prevalence and severity of periodontal disease.</p><table-wrap id="T3" position="float"><label>Table 3</label><caption><p>Mean duration (in years) of diabetes mellitus and periodontal status</p></caption><graphic xlink:href="JISP-15-388-g006"></graphic></table-wrap></sec><sec id="sec2-6"><title>Glycemic status of diabetes mellitus</title><p>The mean fasting blood glucose level was 122.00±34.56, whereas the mean postprandial blood glucose level was 212.36±61.09. In healthy periodontium group, it was 76.24±3.29 and 117.16±4.22 and was found to be maximum in generalized periodontitis group i.e. 146.73±35.91 and 247.66±56.16, respectively [<xref ref-type="fig" rid="F4">Figure 4</xref>]. It was observed that the blood glucose levels were 98.70±19.63 and 154.01±39.59, when periodontal disease index score was 1, and 173.50±29.30 and 287.04±38.65, when score was maximum of 6 [<xref ref-type="table" rid="T4">Table 4</xref>]. Thus, the glycemic status was significantly (<italic>P</italic><0.01) related to the prevalence and severity of periodontal disease.</p><fig id="F4" position="float"><label>Figure 4</label><caption><p>Mean blood glucose level (mg%) and periodontal status</p></caption><graphic xlink:href="JISP-15-388-g007"></graphic></fig><table-wrap id="T4" position="float"><label>Table 4</label><caption><p>Mean blood glucose level (mg%) and periodontal disease index</p></caption><graphic xlink:href="JISP-15-388-g008"></graphic></table-wrap></sec><sec id="sec2-7"><title>Miller's mobility index</title><p>Six hundred and fifty six patients’ (43.7%) and a total 3800 teeth exhibited pathological tooth mobility. Out of these, 2992 (78.7%), 501 (13.2%), and 307 (8.1%) teeth exhibited grade I, II, and III mobility, respectively. No mobility was found in the age groups, I and II (upto 34 years of age). At the level of significance <italic>P</italic><0.01, there was a statistically significant correlation of tooth mobility with glycemic status of diabetics.</p></sec><sec id="sec2-8"><title>Missing teeth</title><p>Out of the 1500 patients, 624 (41.6%) were complete dentulous, while 785 (47.7%) were partially and 161 (10.7%) were completely edentulous. Hundred and eighty seven patients (12.4%) had lost the teeth before the diagnosis of diabetes mellitus, while 479 patients (32%) lost their teeth after the diagnosis of diabetes mellitus. There was a statistically significant (<italic>P</italic><0.01) correlation between the number of missing teeth and age of the patient, duration of diabetes mellitus and prevalence and severity of periodontal disease.</p></sec></sec><sec id="sec1-4"><title>DISCUSSION</title><p>Very often, course of periodontal disease is modified by the systemic disorder of patients. The systemic disorder exerts the effect in a generalized manner and so also affects the occurrence and management of the periodontal conditions. One of such systemic conditions playing an important role in the etiology of periodontal disease is diabetes mellitus.</p><p>Cianciola <italic>et al</italic>.[<xref ref-type="bibr" rid="ref8">8</xref>] reported the prevalence of periodontitis to be 39% in individuals aged 19 years and older, while in patients above 35 years of age, Rylander <italic>et al</italic>.,[<xref ref-type="bibr" rid="ref14">14</xref>] reported the prevalence of periodontitis to be 87%; Bacic <italic>et al</italic>. reported the prevalence to be 50%.[<xref ref-type="bibr" rid="ref15">15</xref>] Consistent with these findings, the prevalence of periodontitis and gingivitis was 59.5% and 26.4%, respectively, in the present study. This is inspite of the fact that the present study had very small percentage (3.4%) of IDDM patients and 96.6% NIDDM patients.</p><p>Sheridan[<xref ref-type="bibr" rid="ref16">16</xref>] found that periodontal disease increases in prevalence and severity with age of the patient. Albert <italic>et al</italic>.,[<xref ref-type="bibr" rid="ref17">17</xref>] Novaes <italic>et al</italic>.,[<xref ref-type="bibr" rid="ref18">18</xref>] and Bridges <italic>et al</italic>.[<xref ref-type="bibr" rid="ref19">19</xref>] compared periodontal status of diabetics with non diabetics and supported these results in relation to severity of periodontal disease. The present study had also demonstrated that as age of the diabetic increases, the prevalence and severity of periodontal disease increases. Collagen is the predominant component of gingival connective tissue accounting for approximately 60% of connective tissue volume and 90% of the organic matrix of alveolar bone. Oliver and Tervonen[<xref ref-type="bibr" rid="ref20">20</xref>] had stated that the properties of human collagen are changed during aging and with the metabolic abnormalities of diabetes mellitus. Thus, altered collagen metabolism in diabetics would be expected to contribute to the progression of periodontal disease.</p><p>The mean plaque and calculus index values were minimum in patients having healthy periodontium, but increased gradually with the progress of the periodontal disease except for localized periodontitis. This may be on account of the absence of or scanty amount of plaque or calculus on the remaining teeth in localized periodontitis patients.</p><p>Cerda <italic>et al</italic>.[<xref ref-type="bibr" rid="ref21">21</xref>] and Firatli <italic>et al</italic>.[<xref ref-type="bibr" rid="ref5">5</xref>] had concluded that the duration of diabetes was a significant factor for the severity of periodontal disease. Emrich <italic>et al</italic>.[<xref ref-type="bibr" rid="ref22">22</xref>] stated that the diabetic status was significantly and strongly related to both prevalence and severity of periodontal disease. From the present study also, it can be speculated that poorer the control and longer the duration of diabetes, the greater will be the prevalence and severity of periodontal disease. Karjalainen and Knuuttila[<xref ref-type="bibr" rid="ref23">23</xref>] had suggested that hyperglycemia impairs overall cell function, as insulin is required for glucose to enter cells to provide a source of energy. It also decreases PMN cell chemotaxis, phagocytosis and intracellular killing of bacteria. The ability of glycosylated hemoglobin to carry oxygen would be impaired, thereby decreasing tissue oxygenation. Hyperglycemia induces blood flow abnormalities including increased blood viscosity, reduced erythrocyte deformability, and increased platelet aggregation, which further enhance tissue hypoxia. All these factors result in increased periodontal destruction.</p><p>It was also noticed that the mean duration of diabetes and mean blood glucose levels were least when the score was one and then increased gradually with increase in periodontal disease index score. However, in complete edentulous patients, even though the mean duration was highest, the mean blood glucose levels were very less when compared to patients with localized/generalized periodontitis. This may point towards the effect of destructive periodontitis on blood glucose level as observed also by Miller <italic>et al</italic>.[<xref ref-type="bibr" rid="ref24">24</xref>] and Taylor <italic>et al</italic>.[<xref ref-type="bibr" rid="ref25">25</xref>] The mechanisms may be:</p><p><list list-type="order"><list-item><p>The predominant cultivable organisms at the base of the active periodontal pockets are gram negative and thus produce endotoxin which has been shown to cause hyperglycemia and depletion of liver glycogen (Schluger <italic>et al</italic>.[<xref ref-type="bibr" rid="ref2">2</xref>).</p></list-item><list-item><p>The tumor necrosis factor alpha and cytokines found in destructive periodontitis interferes with the action of insulin and lead to metabolic alterations during infection. The relationships between insulin resistance and inflammatory connective tissue diseases have also been reported for severe periodontitis as a risk factor for poor glycemic control. It is, thus, expected that there is an increase in blood glucose levels in diabetics with the increasing severity of periodontal disease.</p></list-item></list></p><p>Three thousand and eight hundred teeth were found to have mobility of different grades and were significantly related to the glycemic status of diabetics. Tervonen and Knuuttila,[<xref ref-type="bibr" rid="ref26">26</xref>] found the mineral content of bone to be correlated to the fasting blood glucose levels, as altered collagen metabolism in diabetes can lead to osteopenia and osteoporosis. Epstein[<xref ref-type="bibr" rid="ref27">27</xref>] demonstrated that essentially all the aspects of bone growth and mineralization are diminished in the absence of insulin i.e. hyperglycemia. The vascular changes also increase with increase in blood glucose levels (Oliver and Tervonen).[<xref ref-type="bibr" rid="ref20">20</xref>] All these mechanisms may partly explain the relationship between glycemic status and tooth mobility upto the age of 34 years. No tooth mobility was observed in this study. It started from the age 35 years and then the number of mobile teeth increased with increase in age of the patient. Bacic <italic>et al</italic>.[<xref ref-type="bibr" rid="ref15">15</xref>] called this 35<sup>th</sup> year as a critical age when a faster destruction of periodontium in patients suffering from diabetes begins.</p><p>The role that diabetes plays in the initiation and progression of periodontal disease involves multiple factors. Particularly poor metabolic control as well as extended duration of diabetes is a risk factor for periodontitis when extensive local irritants are present on teeth. The dentist can play an important role in diabetic patients overall health care through recognition and treatment of their periodontal needs understanding the “Sixth Complication of diabetes mellitus.”</p></sec><sec id="sec1-5"><title>CONCLUSION</title><p>Following inferences are drawn from the present study:</p><p><list list-type="order"><list-item><p>The prevalence of periodontal disease in diabetic patients was 86.8% (gingivitis 27.3% and periodontitis 59.5%) and complete edentulousness was 10.7%. Remaining 2.5% was periodontally healthy. The average loss of attachment three to six mm was present in 24.2% of the total 1500 patients’, whereas more than six mm were present in 15.4% patients.</p></list-item><list-item><p>Prevalence as well as severity of the periodontal disease increased with increase in age, but not with the sex.</p></list-item><list-item><p>Plaque and calculus index were significantly correlated with the severity, but not with the prevalence of periodontal disease.</p></list-item><list-item><p>Duration of diabetes mellitus was significantly correlated to the prevalence and severity of periodontal disease.</p></list-item><list-item><p>Glycemic status had a significant effect on the prevalence and severity of periodontal disease.</p></list-item><list-item><p>There was a statistically significant correlation between glycemic status and tooth mobility.</p></list-item><list-item><p>The number of missing teeth increased with increase in age of the patient and duration of diabetes mellitus, and had the direct correlation with the severity of periodontal disease.</p></list-item></list></p></sec></body><back><fn-group><fn fn-type="supported-by"><p><bold>Source of Support:</bold> Nil</p></fn><fn fn-type="conflict"><p><bold>Conflict of Interest:</bold> None declared.</p></fn></fn-group><ref-list><title>REFERENCES</title><ref id="ref1"><label>1</label><element-citation publication-type="book"><person-group person-group-type="author"><name><surname>Carranza</surname><given-names>FA</given-names></name><name><surname>Newman</surname><given-names>MG</given-names></name></person-group><article-title>Clinical periodontology</article-title><year>1996</year><edition>8th ed</edition><publisher-loc>India</publisher-loc><publisher-name>Prism Books Ltd</publisher-name><comment>and Philadelphia: W. 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