Related Experiment Video
Updated: Jul 1, 2025

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material
Published on: December 20, 2024
Occlusal Veneers and Load-Bearing Capacity of a Restored Tooth
Purpose:
To evaluate the influence of restoration bonding and preparation type on the load bearing capacity of a tooth restored with an indirect glass-ceramic or hybrid-ceramic occlusal veneer restoration.
Materials And Methods:
Occlusal surfaces of extracted human molar teeth were prepared for indirect occlusal veneers with or without circumferential chamfer. The occlusal veneers were milled either from CAD/CAM hybrid- ceramic (HC; Cerasmart, GC Dental), or lithium-disilicate glass-ceramic (LDGC; IPS e.max CAD, Ivoclar) blocks. Finalized veneers were bonded to teeth following manufacturers' instructions or according to the technique for the intended deteriorated bonding using n-hexane wax solution preconditioning on restorations (n = 8/group). The ultimate fracture load was recorded, and fracture types were analyzed and classified visually. Statistical analysis was performed using one-way ANOVA.
Results:
The highest fracture load was recorded in teeth with bonded LDGC veneer (P ≤ .0007). The bonded HC veneers had only a marginally higher fracture load compared to nonbonded veneers. In all groups with deteriorated bonding, veneers loosened without tooth fracture, whereas in the bonded veneer groups tooth fractures were observed, especially in teeth restored with LDGC material.
Conclusions:
Bonded LDGC occlusal veneers have high load-bearing capacity that exceeds the fracture resistance of tooth structure. Circumferential chamfer preparation for an occlusal veneer has no influence on fracture load of a restored tooth.
Related Concept Videos
Veneer
Other veneering techniques include plain-slicing, quarter-slicing, and rift-slicing. These...
Tooth Anatomy
The Crown, Neck, and Root
The visible part of the tooth is referred to as the crown. It's covered by enamel, the hardest substance in the human body. The crown is uniquely shaped for each type of tooth, allowing for different functions such as cutting, tearing, or...
Assessment of the Mouth
Mouth Inspection
The inspection begins with visually examining the mouth for symmetry, color, and size.
General Case of Eccentric Axial Loading
Consider a member subjected to equal and opposite forces that are applied along a line that does not coincide with the member's neutral axis. In unsymmetrical...
Teeth
In the bud stage, the tooth germ (an aggregation of cells) starts to form in the developing jawbone. During the cap stage, the tooth germ differentiates into enamel organ, dental papilla, and dental sac, which will later develop into the tooth's enamel, dentin...
Eccentric Axial Loading in a Plane of Symmetry

