Objective: To investigate and compare the retention rates of Flowable-Nanocluster-Composite and Resinmodified-Glass-Ionomers in non-carious cervical lesions in maxillary molars. Study Design: Prospective cross-sectional comparative study. Place and Duration of Study: Department of Operative Dentistry, Armed Forces Institute of Dentistry,Rawalpindi, from Jan 2017 to Dec 2018. Methodology: Male patients ranging from 30-40 years with moderate non-carious cervical lesions of maxillarypremolars and molars of either quadrant presenting to out-patient department were selected through convenience sampling. These lesions were restored with Flowable-Nanocluster-Composite and Resin-Modified-GlassIonomer. Retention of these two materials over the period of 6 months, 1 year and 2 years was noted. Chi square statistics were used to compare groups. Results: The retention of Flowable-Nanocluster-Composite was 92% in 6 months, 85% in one year and 81% in two years. Whereas, for resin-modified-glass-ionomer restorations, the frequency of retention of the filling material was 97% at 6 months, 93% at one year and 89% at two years period. Out of the total 74 resin-modified-glassionomers restorations, 8 (11%) had dislodged by the end of the second year as compared to 14 (19%) dislodged restorations for Flowable-Nanocluster-Composite. Conclusion: In conclusion, the study reveals that resin modified glass-ionomer has a superior retention rate over the period of two years as compared to Flowable-Nanocluster Composite. A dentist should have an insight into compositions of restorative materials for the longevity of their retention in various lesions.

Objective: To investigate and compare the risk factors of Non carious cervical lesions in relation to demographics, dietary, social and hygiene maintaining habits in Pakistani population presenting to Armed Forces Institute of Dentistry Rawalpindi. Study Design: Cross sectional analytical study. Place and Duration of Study: Department of Operative Dentistry, Armed Forces Institute of Dentistry, Rawalpindi Pakistan, from Dec 2018 to May 2019. Methodology: Two hundred patients of both genders ranging from age 12 to 70 years with a mean age of 46.4 ± 12.4 were studied for Non carious cervical lesions presence on convenience sampling technique. Questionnaires regarding their diet, acidic food consumption, social habits, frequency and pattern of brushing were being filled. Chi square statistics were used to compare groups and results were noted. Results: Old age (55.4 ± 0.8 years), vegetarian diet (p≤0.001), consumption of acid foods (p≤0.001), bruxism (p≤0.001), harder tooth brushes (p≤0.001) with variable movements (p≤0.001) showed higher incidence of non-carious cervical lesions. Whereas use of fluoridated toothpastes (p≤0.001) and xylitol gums (p=0.02) demonstrated protection against the occurrence of these lesions. Conclusion: The presence of Non carious cervical lesions was linked with the use of harder toothbrushes, variable vigorous pattern for tooth brushing, consumption of a vegetarian diet, and greater consumption of acidic food and bruxism. Effective policies should be developed for oral health and awareness of such conditions.