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Malik, Shefali S.
- To Evaluate the Marginal Fit of Metal Copings Fabricated by Conventional Casting Procedure and Direct Metal Laser Sintering Technology-An in Vitro Study
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Materials and method: Forty tooth preparations were carried out over extracted mandibular molars. They were divided into two groups A and B of 20 each. For group A Co-Cr copings were fabricated by direct metal laser sintering (DMLS) and for group B by lost wax technique (LW). Glass-ionomer cement (GIC) was used to tack the copings over their preparations. Marginal fit was then evaluated directly under the stereomicroscope.
Results: The mean marginal gap of group A was 27.9±2.4 μm and group B was 40.4 μm. Statistical analysis using t-test showed highly significant difference (P>.05) between the marginal mean of the DMLS (group A) compared to LW (group B).
Conclusion: The DMLS copings demonstrated superior marginal fit compared to that of conventional Co-Cr casted copings.
Authors
Affiliations
1 Dept. of Prosthodontics, Bhojia Dental College and Hospital, Himachal Pradesh, IN
1 Dept. of Prosthodontics, Bhojia Dental College and Hospital, Himachal Pradesh, IN
Source
Dental Journal of Advance Studies, Vol 5, No 1 (2017), Pagination: 39-46Abstract
Purpose: The purpose of this in vitro study was to evaluate marginal fit of cobalt- chromium (Co-Cr) copings fabricated by direct metal laser sintering system (DMLS) and conventional lost-wax technique (LW).Materials and method: Forty tooth preparations were carried out over extracted mandibular molars. They were divided into two groups A and B of 20 each. For group A Co-Cr copings were fabricated by direct metal laser sintering (DMLS) and for group B by lost wax technique (LW). Glass-ionomer cement (GIC) was used to tack the copings over their preparations. Marginal fit was then evaluated directly under the stereomicroscope.
Results: The mean marginal gap of group A was 27.9±2.4 μm and group B was 40.4 μm. Statistical analysis using t-test showed highly significant difference (P>.05) between the marginal mean of the DMLS (group A) compared to LW (group B).
Conclusion: The DMLS copings demonstrated superior marginal fit compared to that of conventional Co-Cr casted copings.
Keywords
Cobalt Chromium, Direct Metal Laser Sintering, Porcelain Fused Metal Crowns.Full Text
References
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