Patient Satisfaction and Debonding of Monolithic Translucent Zirconia Crowns Using two Compositions of Self-Adhesive Resin Cements (Randomized Clinical Trial)

Abstract

objectives: The aim of the present study was to evaluate the effect of TheraCem (MDP containing, ca and fluoride releasing) self-adhesive resin cement and Multilink (non MDP containing) self-adhesive resin cement on the patient satisfaction and debonding of monolithic translucent zirconia crowns. Twenty single monolithic translucent zirconia crowns were constructed to restore premolar teeth using two types of Self-adhesive resin cements

Methods: First, Scaling and polishing were performed for all enrolled patients two weeks before the preparation. The patients were divided into two groups according to the type of the self-adhesive resin cement after randomization. Group1: Multilink (non MDP containing cement) and Group 2: TheraCem (MDP-containing, Ca and fluoride releasing cement). The teeth were prepared to receive single monolithic zirconia crown. Then, the try-in crowns were fabricated from resin (YAMAHACHI PMMA) and the final crowns were constructed from super translucent multilayered monolithic zirconia (STML Katana, Kuraray) using CAD/CAM technology in which (DWX-50) machine was used for milling and (exoCad) software for designing. The restoration surfaces were treated using sandblasting and the cementation was using the cement selected for each group. Debonding and patient satisfaction were assessed at base line using the modified United States Public Health Service for restoration clinical assessments  and repeated at three, six, and twelve months respectively.

Results No statistical significant difference in the debonding of zirconia crowns was found in both groups. Finally there was significant decrease in patient satisfaction with multilink cement by time.

Conclusion: Patient satisfaction was improved by time using TheraCem self-adhesive resin cement. Besides, both TheraCem and Multilink resin cements produced comparable results in terms of debonding of the restorations