Comparative Evaluation of the Marginal Accuracy of Four Different Types of Pattern Waxes in Complete Cast Crown- An In Vitro Study
Journal Title: International Journal of Medical Science and Innovative Research (IJMSIR) - Year 2018, Vol 3, Issue 6
Abstract
Introduction: Precise marginal seating is more important in dental restoration to fulfill biological, physical and cosmetic requirements. The accuracy of wax pattern is of major significance for obtaining a well fitting casting. Improper marginal fit has been identified as a cause of failure of cast restorations. Aim: To evaluate and compare the marginal accuracy of four different types of pattern waxes in complete cast crown. Method: 40 impressions were made from the stainless-steel master die, using an addition silicone impression material (Dentsply) with a custom acrylic tray. Wax Patterns were fabricated using 4 different pattern waxes namely Kronenwachs 40111 Blue (Bego Company-Group 1), Thowax Sculpturing Wax (Yeti dental company-Group 2), Modelling Wax Ivory No 8420560 (DFS Diamon Company-Group 3), Sigmadent Company(Group 4) on 40 working stone dies obtained from master die. Marginal gaps were measured in four locations using an optical microscope with image analyzer at 100x magnification. The software used was la32, LECO, USA. Results: ANOVA test revealed a significant difference between different waxes with respect to mean distance. There was statistically significant difference for marginal discrepancy values for Group 3 (DFS) and other pattern materials (p< 0.05). However no statistacilly significant difference was seen with marginal discrepancy values of Group 1(Bego), Group 2 (Yeti) and Group 4 (Sigmadent). Conclusion: Modelling Wax ivory no 8420560 (DFS Company-Group 3) was found to be most accurate pattern wax than that of other pattern waxes tested for marginal discrepancy.
Authors and Affiliations
Dr. Sejal Shinde Tambake
Keywords
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