Fracture Resistance of Manually and CAD/CAM Manufactured Ceramic Onlays

Abstract

All groups showed clinically acceptable fracture strength results. According to the study, both the onlay fabrication system and adhesive cements can be a viable treatment option.

Fracture resistance of prepared premolars restored with bonded new lab composite and all‐ceramic inlay/onlay restorations: Laboratory study

“…Also, cyclic loading fatigue had an important role in the development and growth of cracks, which reduce the strength of ceramic onlays, or lead to their failure . This result is in agreement with Yildiz et al who illustrated that the most predominant failure mode for pressable glass ceramic onlay samples cemented by variolink II was in the restoration itself.…”

Effects of manufacturing methods on the survival rate of ceramic and indirect composite restorations: A systematic review and meta‐analysis

“…This could be explained by the strong bond between ceramics and dental structure when a protocol of acid etching and silanization of vitreous ceramic is used. In this manner, the strength of all porcelains is increased, and clinically behaves in a similar manner . Another factor that may explain the similar behavior of these materials is the fact that many glass ceramic copings are stratified from vitreous ceramics in powder/liquid form.…”

“…Ceramics and composites have characteristics with regard to structure and manufacturing methods, that associated with the luting agents, and intraoral conditions are important factors attributed to longevity of inlay, onlay, and overlay restorations, being clinicians responsible for the decision‐making process. However, this choice is conducted based on criteria such as strength, translucency/opacity degree, preference of dental laboratory technician, and advertising claims .…”

“…Indirect esthetic materials may be clustered into two groups: ceramics (crystalline or vitreous ceramics [feldspathic porcelain and glass ceramic]), and composites . Feldsphatic porcelain may be found in powder (stratification) or block (CAD/CAM) forms.…”

Influence of restoration thickness and dental bonding surface on the fracture resistance of full-coverage occlusal veneers made from lithium disilicate ceramic

“…In a study of Yildiz et al [52] the fracture resistance of pressed and CAD/CAM manufactured lithium disilicate partial crowns with an occlusal thickness of 1.5 mm (according to the manufacturer's recommendation) was compared and a lower fracture resistance for the CAD/CAM restorations was revealed. They also investigated the influence of the bonding technique on the fracture resistance by bonding some specimen using the total-etch technique and the others by using Multilink primer A/B as conditioning method.…”