Evaluation of Marginal and Internal Fit of Cad/Cam Endocrowns With Different Cavity Tapers Publisher Pubmed



Hajimahmoodi M¹ ; Raseipour S¹ ; Mroue M¹ ; Ghodsi S² Show Affiliations
Source: International Journal of Prosthodontics Published:2023

Abstract

Purpose: To evaluate the effect of cavity tapering on marginal and internal adaptation of endocrowns fabricated from two different ceramic materials. Materials and Methods: Two mandibular molar model teeth were prepared with two different cavity tapers (5 and 10 degrees). A total of 40 endocrowns (four groups of 10 each) were milled using lithium disilicate and zirconia-reinforced lithium silicate ceramics for each cavity taper. The marginal and internal adaptation of endocrowns were measured by a stereomicroscope (×30) at 18 different points. The data were statistically analyzed using independent t test (P <.05). Results: A statistically significant difference was shown among the tested groups at 10 degrees of taper (P <.001). At 5 degrees of taper, the difference was insignificant. The greatest internal gap was observed at the pulpal floor in all tested groups. Conclusion: All materials had clinically acceptable internal and marginal gaps; however, lithium disilicate ceramic had significantly better adaptation at 10 degrees of taper. © 2023 by Quintessence Publishing Co Inc.