Assessment of marginal adaptation obtained by using two different coping techniques -an invitro study

Dr. Vinodh.R; Dr. Rathika Rai

Volume : IX, Issue : VII, July - 2020

Assessment of marginal adaptation obtained by using two different coping techniques -an invitro study

Dr. Vinodh. R, Dr. Rathika Rai

Abstract :

Background of the study: Marginal adaptation is essential for the extensive clinical achievement of single- or multiple-unit fixed-prosthesis. Micro leakages, accumulation of deis or plaque, secondary caries followed by restoration failure are the most common technical hitches associated with development of marginal gap between the tooth and the restorative material. Aim and objectives: The aim of this in-vitro study is to assess the marginal adaptation obtained by using two different coping techniques. Materials and method: A randomly selected phantom teeth of 46 (mandibular molar) and tooth preparations were made using medium-grit diamond burs followed by fine diamond burs to provide smooth finished margins.Wax pattern were made a group A without margin wax and with margin wax as group B Marginal gap discrepancies measurements were made along the coping margins of Group A- (n=10) and Group B-(n-10). under a stereomicroscope at original magnification (50x). Once caliations were made, all the four measurements from each marginal aspect (buccal, lingual, mesial and distal aspects) in both groups were recorded. Chi square test, One-way ANOVA and Wilcoxon signed test were used to compare the mean values, standard deviation, F value, and P value of each test group. Results: One-way ANOVA Analysis showed significant statistical difference p<0.05 on comp� the lingual, mesial and distal aspects between the two groups. The results of the marginal gap measurements revealed statistically significant differences between the two groups (p<0.05) by Wilcoxon Signed Ranks Test. Conclusion: From the above results it was observed that group B showed lesser marginal gap discrepancies than group A. In addition to this result, marginal gaps values of both groups before and after cementation were within the clinically satisfactory or acceptable level.