Impact of Erosive Media on Occlusal Veneers Constructed from CAD/CAM Hybrid Ceramics: An In-Vitro Study

Document Type : Original Article

Authors

1 BDS, MSc student, Department of Fixed Prosthodontics, Mansoura University, Egypt

2 Fixed Prosthodontics Department, Faculty of Dentistry, Mansoura University, Mansoura National University (MNU), Egypt

10.21608/acdj.2025.411232.1042

Abstract

Abstract
Objectives: This in-vitro study investigated the effect of hybrid ceramic material type and erosive media on the fracture resistance and failure mode of occlusal veneer restorations.
Methods: Forty-eight natural mandibular first molars received occlusal veneer restorations (1.0 mm thickness) and were randomly divided into two groups (n = 24) according to the CAD/CAM hybrid ceramic material: SHOFU Block and VITA ENAMIC. Each group was further subdivided into three subgroups (n = 8) based on the erosive medium used for immersion: artificial saliva, simulated gastric hydrochloric acid, and Red Bull energy drink. Veneers were etched with 9.5% hydrofluoric acid, silanated, and adhesively luted to their corresponding prepared teeth using dual-cure resin cement. After 7 days of immersion in each medium at 37 °C with daily renewal, specimens were subjected to fracture testing in a universal testing machine. Failure modes were evaluated using a stereomicroscope. All data were recorded, tabulated, and statistically analyzed.
Results: A statistically significant difference in fracture resistance was found for SHOFU Block immersed in artificial saliva (3853.45 ± 588.77 N; P < 0.05). No statistically significant differences were detected in the failure modes among all tested groups (P > 0.05).
Conclusions: The type of hybrid ceramic material influences the fracture resistance of occlusal veneer restorations following erosive aging, but not the mode of failure.

Keywords

Main Subjects

Ahram Canadian Dental Journal
Volume 4, Issue 3
July 2025
Pages 178-196

Files

Share

How to cite

Statistics