Aim: To evaluate the prevalence and severity of periodontal diseases between osteoporotic and nonosteoporotic subjects. Materials and methods: The study population included 140 subjects (70 osteoporotic and 70 nonosteoporotic) age group of 35-70 years. Skeletal (calcaneal) bone mineral density (BMD) was measured by quantitative ultrasound technique (QUS) for T score values. Periodontal status was examined by plaque index (PI), bleeding index, probing depth (PD) and clinical attachment level. Digital panoramic and intraoral periapical radiographs (IOPA) were taken with fixed reference point for evaluation of bone interdental alveolar bone loss (ABL). The recorded data for T score, interdental ABL and periodontal status were subjected to statistical analysis for correlation and regression procedure. Results: The prevalence of the periodontal diseases, in osteoporotic group 120 (54.5%) were with periodontitis and in nonosteoporotic group 100 (50%) were with periodontitis. Correlation of T score with age, PI, gingival index (GI), probing pocket depth (PPD), clinical attachment loss (CAL), and ABL in nonosteoporotic group was found statistically not significant. The age was (r = −0.052) indicating positive association with weak correlation, The PI is (r 0.060) indicating positive association, the GI was (r = −0.053) indicating negative association with weak correlation, the PPD was (r = 0.070) indicating positive association with weak correlation, the CAL was (r = 0.133) indicating positive association with weak correlation, ABL was (r 0.027) indicating positive association with weak correlation. Conclusion: Calcaneal BMD was related to ABL and, to a less extent, to CAL, implicating osteoporotic subjects are at high risk indicator for periodontal diseases. Clinical significance: Even though the pathogenesis of periodontitis and osteoporosis differs; these diseases have several common risk factors. Both may have a additive impact on patients, which requires concomitant medical and dental management which mandates simultaneous diagnosis of both.

Aim:The aim of the study was to evaluate the dimensional accuracy of three combinations of polyvinyl siloxane impression material by doublemix single-step impression technique. Materials and methods: Metal master model was made according to the ADA specification no. 19; ISO 4823:2000/AMD 2007. Impressions were made using perforated custom-made metallic trays of 2 mm and 4 mm spacing, the impression materials used were putty, heavy body, regular body and light body. A total of 30 impressions were made by single-step technique and poured in die stone to obtain resultant cast. Ten impressions were made of each combination of polyvinyl siloxane (PVS). Three dimensions (interabutment distance, height and diameter) on resultant cast were measured and compared with metal master model. The results were statistically analyzed and tabulated. Results: Diameter of abutment, the height of abutment and interabutment distance in each group were larger in dimensions as compared with metal master model. The dimensional discrepancies of group I, group II and group III casts when compared with the master model were significantly different from each other. The least difference was found in group I. Conclusion:The one-step putty-light body combination (group I) produced the most accurate stone casts compared with one-step heavy body-light body and regular body-light body combinations. Clinical significance: In everyday dental practice, impression making is imperative. Hence, by doing this study, we tried to find out which material combination is suitable to give us predictable and accurate results.

Aim: To determine the effect of three different cavity disinfectants (2% chlorhexidine gluconate, 2.5% sodium hypochlorite, and 2% iodine solution) on microleakage in a seventh-generation dentin-bonding system. Materials and methods: Class V cavity was prepared on 50 extracted molars (n = 50). The respective experimental groups were treated with cavity disinfectants and Adper Easy One Bond. Preparations without cavity disinfectants worked as negative control and those with neither disinfectant nor dentin-bonding resin application worked as positive controls. After the cavity preparations were restored with resin composite (Filtek™ Z 350), the teeth were then subjected to dye leakage tests. Microleakage was assessed for both occlusal and gingival margins, using a stereomicroscope. Data were analyzed using (ANOVA; Kruskal-Wallis) test. Results: No statistically significant differences were observed among 2% chlorhexidine gluconate, 2.5% sodium hypochlorite, and 2% iodine and also no statistically significant differences were observed between occlusal and gingival margins of groups. Conclusion:(1) 2% chlorhexidine gluconate, 2.5% sodium hypochlorite, and 2% iodine produced significantly higher microleakage when used with seventh-generation dentin-bonding agent. (2) 2% chlorhexidine gluconate produced lesser microleakage in comparison with 2.5% sodium hypochlorite and 2% iodine. (3) The gingival margins exhibited greater microleakage than occlusal margins. Clinical significance: The application of cavity disinfectants on prepared tooth before the application of dentin-bonding agent could help to reduce the potential risk of residual caries and postoperative sensitivity.