Evaluating the Fracture Strength of Different CAD/CAM Materials on Occlusal Veneers

2026 CED/NOF-IADR Oral Health Research Congress in Lisbon, Portugal, Lisbon, Portekiz, 3 - 05 Eylül 2026, ss.277, (Özet Bildiri)

Evaluating the Fracture Strength of Different CAD/CAM Materials on Occlusal Veneers

Objectives :Use of minimally invasive occlusal veneers made of ceramic and resin materials has been

preferred in recent years. The aim of this study was to evaluate the effect of different CAD/CAM materials

and thickness on the fracture strength of occlusal veneers in the treatment of worn tooth surfaces with

occlusal veneers.

Methods :A total of 100 human mandibular molar teeth were prepared for occlusal veneers, with a 1 mm

circumferential rounded chamfer step; a 1.5 mm height extending from the preparation margin to the

occlusal plane was created. Occlusal veneers were produced in two different thicknesses (0.6 and 1.5 mm)

using four different CAD/CAM blocks (lithium disilicate glass ceramic block (IPS e.max), nanoceramic

resin block (Lava & CeraSmart 270), hybrid ceramic block (Enamic), and experimental short fiber-

reinforced composite (SFRC CAD)) designed using Cerec software. After the cementation procedures, all

samples were kept in water at 37 °C for 2 days and a fracture strength test was performed.

Results: The data obtained were analyzed using ANOVA and Tukey test (p<0.05) . Restorations made

with IPS e.max exhibit the lowest fracture strength values at thicknesses of 0.6 mm (1224.1 N) and 1.5

mm (1799.9 N), while experimental SFRC CAD restorations showed the highest fracture strength values at

both thicknesses (2560 N and 2799 N, respectively).

Conclusions: Findings of this study indicate that SFRC CAD blocks have promising load-bearing capacity

and thus represent a potential alternative to traditional CAD/CAM materials for occlusal veneer

applications.