Longevity of ceramic onlays: A systematic review

A selection of abstracts of clinically relevant papers from other journals. The abstracts on this page have been chosen and edited by Reena Wadia

Abstract

The most common pattern of failure is fracture of the ceramic material and the risk of failure seems to increase if the restored tooth is non-vital and the patient demonstrates parafunctional habits.

Main

Abduo J & Sambrook RJ. J Esthet Restor Dent 2018; 10.1111/jerd.12384.

This systematic review evaluated the longevity of ceramic onlays and factors that influenced their survival. An electronic search was conducted through PubMed (MEDLINE), Google Scholar and Cochrane Library, up to August 2017. Twenty-one studies were included. The medium-term studies (2–5 years) indicated a survival rate of 91–100%, and the long-term studies (more than 5 years) showed a survival rate of 71–98.5%. The most common reason of failure was fracture, followed by debonding and caries. The most common patterns of deterioration were loss of margin integrity and discoloration. Onlay longevity can be enhanced if the preparation allows for at least 2 mm occlusal ceramic thickness and incorporates additional retentive features. Higher failure rates were associated with non-vital teeth, posterior teeth and when placed in patients with parafunctional habits. Fabrication materials and methods as well as adhesive bonding system were not found to influence onlay longevity.