COMPARATIVE EVALUATION OF MARGINAL DISCREPANCY OF CASTINGS MADE WITH CONVENTIONAL AND ACCELERATED CASTING TECHNIQUE USING TWO TYPES OF PATTERN MATERIALS
Journal Title: Journal of Medical and Dental Science Research (Quest Journals JMDSR) - Year 2018, Vol 5, Issue 1
Abstract
OBJECTIVE: to measure the marginal discrepancy of Co- Cr copings made by two different pattern materials and two diiferent casting techniques METHODS: A total of 40 Cobalt - Chromium copings were fabricated on a standardized die using two types of pattern materials & two different casting techniques and divided into 4 groups with 10 copings each. Group I : Conventional casting with inlay wax Group II: Accelerated casting with inlay wax Group III: Conventional casting with autopolymerizing pattern resin Group IV: Accelerated casting with autopolymerizing pattern resin Marginal gap of copings were examined under 40X stereomicroscope at two reference points. The measurements were put to statistical analysis. RESULTS : Results showed minimal marginal discrepancy in copings fabricated using inlay pattern wax with conventional casting. Maximum marginal discrepancy was observed in casting fabricated using autopolymerizing pattern resin with accelerated casting. CONCLUSION: Within limitations of this study , all castings are in clinically acceptable range. Vertical marginal discrepancy is least with conventional casting technique as compared to accelerated casting technique and inlay wax is a better material than autopolymerizing pattern resin for pattern fabrication
Authors and Affiliations
Sakshi Malhotra, Shiv Kumar, Damanpreet Kaur, Mandeep Kaur
Keywords
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