JUNIPER PUBLISHERS-OPEN ACCESS JOURNAL OF DENTISTRY & ORAL HEALTH In vitro Comparison of Marginal Fit of Cad-Cam Zirconia, SMLS Co-Cr, Pressable Lithium Disilicate, and Cast Ni-Cr Copings Authored by Jitendra J Mete Abstract Context: Clinically acceptable marginal fit of crowns has been the focus of various investigations. There is limited literature comparing marginal accuracy CAD-CAM zirconia, SMLS Co-Cr, Pressable Lithium Disilicate, and cast Ni-Cr copings. Aim: Evaluate and compare marginal accuracy of CAD-CAM zirconia, SMLS Co-Cr, Pressable lithium Disilicate, and cast Ni-Cr copings. Methods and Material: Forty copings were fabricated (Ten each in Group I - CAD- CAM zirconia, Group II - SMLS Co-Cr, Group III - lithium disilicate, and Group IV- cast Ni-Cr copings) on a standardized stainless steel model with long chamfer finish line. Four areas around the tooth surface namely mesial (M), distal (D), buccal (B) and lingual (L) surfac...
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