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Marginal Fit Metal-Ceramic and In-Ceram Single Crown Cement retained in Implant-supported Abutments
Valdimar S Valente1, Carlos E Francischone2, C D Vilarinho Soares de Moura1
1Department of Prosthodontics and Restorative Dentistry Federal University of Piaui (UFPI), Teresina, Piaui, Brazil.
Introduction:
This study evaluated the cervical fit of cemented metal-ceramic and In-Ceram implant-supported crowns, before and after the cementing procedure.
Materials And Methods:
Twenty crowns cemented on implant abutments are divided into two groups (n = 10): Group 1 -cemented metal-ceramic crowns and group 2 - cemented In-Ceram crowns. The marginal adaptations before and after cementation were evaluated in a comparison microscope with an error of 1 μm. All crowns were cemented with zinc phosphate cement.
Results:
The cervical misalignment of cemented crowns before cementation (52.65 ± 11.83 and 85.73 ± 14.06 μm) was lower than that after cementation (66.80 ± 15.86 and 89.36 ± 22.66 μm).
Conclusion:
The cementing procedure interferes with the marginal fit of cemented crowns on implant abutments, with the prosthesis having better adaptation before cementation. Cemented metal-ceramic crowns exhibited better cervical adaptation than In-Ceram crowns cemented before and after the cementing procedure.
Clinical Significance:
The maintenance of gum health and the longevity of prosthetic restorations are closely related to the restoration's marginal integrity.
