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To Evaluate the Marginal Fit of Metal Copings Fabricated by Conventional Casting Procedure and Direct Metal Laser Sintering Technology-An in Vitro Study


Affiliations
1 Dept. of Prosthodontics, Bhojia Dental College and Hospital, Himachal Pradesh, India
 

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.
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  • To Evaluate the Marginal Fit of Metal Copings Fabricated by Conventional Casting Procedure and Direct Metal Laser Sintering Technology-An in Vitro Study

Abstract Views: 319  |  PDF Views: 101

Authors

Monica Sharma
Dept. of Prosthodontics, Bhojia Dental College and Hospital, Himachal Pradesh, India
Ajay Bansal
Dept. of Prosthodontics, Bhojia Dental College and Hospital, Himachal Pradesh, India
Sunny Panthi
Dept. of Prosthodontics, Bhojia Dental College and Hospital, Himachal Pradesh, India
Shefali S. Malik
Dept. of Prosthodontics, Bhojia Dental College and Hospital, Himachal Pradesh, India
Atulya Sharma
Dept. of Prosthodontics, Bhojia Dental College and Hospital, Himachal Pradesh, India

Abstract


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.

References