Comparative Evaluation of Marginal Fit of Castings Using Conventional and Accelerated Casting Technique with Different Pattern Materials: An In Vitro Study
Citation Information :
Patil S, Gopi A, Kumar S, Gupta A, Abhishek G, Kumar C. Comparative Evaluation of Marginal Fit of Castings Using Conventional and Accelerated Casting Technique with Different Pattern Materials: An In Vitro Study. World J Dent 2023; 14 (8):700-704.
Aim: The aim of the study was to evaluate and compare the marginal fit of casting made by conventional and accelerated casting techniques using inlay wax and pattern resin.
Materials and methods: A total of 40 cobalt-chromium copings were fabricated on typodont tooth using two types of pattern materials and two different casting techniques and divided into two groups of pattern resin and inlay wax with 20 copings each and two subgroups of conventional and accelerated casting technique with 10 copings each. A marginal gap of copings was examined under a stereomicroscope, and collected data were statistically analyzed.
Result: Mean gap in inlay wax castings made using the traditional casting process was 258 µm, whereas the marginal gap in inlay wax castings made using the accelerated casting technique was 300.3 µm. The castings created with autopolymerizing pattern resin using conventional and accelerated casting procedures had maximum mean gaps of 358.4 and 392.5 µm, respectively.
Conclusion: Within the constraints of this investigation, all castings fall within a range of clinical acceptability. Inlay wax is a better material than autopolymerizing pattern resin for pattern fabrication, and the conventional casting technique has the least vertical marginal discrepancy when compared to the accelerated casting technique.
Clinical significance: Traditional casting methods that adhere to manufacturer instructions take a lot of time. Although documented, the accuracy of accelerated casting procedures using base metal alloys has not been sufficiently investigated. Also, there are very few studies to compare two pattern materials; inlay wax and pattern resin.
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