Bruxism and direct and indirect restorations failure: A scoping review

To analyze and present the relationship between bruxism and the failure of direct and indirect dental restorations.

The reporting followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews (PRISMA-ScR). Human studies reporting on the failure of dental restorations in relation to bruxism were included.

MEDLINE (Ovid), Scopus and Pub Med databases were searched from 2012 to 2024. Additional hand searching was made using Google Scholar, and Scopus were utilized for snowball searching.

An initial systematic search was made of bruxism and dental restorations failures based on key terms using MeSH and other thesaurus terms appropriate for each database published between 2012 and 2024. Two reviewers screened ten articles using the established criteria for inclusion and exclusion, and a level of agreement of 90 % was established. The available literature on the frequency of studies of the relationship between Bruxism and failure of direct and indirect dental restorations and also identify gaps in the literature for further investigation.

There were 66 manuscripts for full-text evaluation. After further exclusion, 46 manuscripts were selected for data charting. The studies were on the relationship between bruxism and restorations failure: dental implants studies were 58.7 %; mixed restorations were 10.9 %; indirect restoration (Full Coverage Crowns and Fixed Partial Dentures) 15.2 %; indirect partial coverage restoration (inlays/onlays/overlays/crowns) 6.5 %; indirect restoration (veneers) 4.3 %; direct restoration also 4.3 %. The 87.5 % of the implant studies addressed the effects of bruxism on single implant restorations failure.

Most of the included studies were retrospective, with few prospective studies or clinical trials. However, Bruxism is a risk factor for the failure of direct and indirect restorations.

Clinicians should be aware that direct and indirect restorations are at risk of failure in the presence of bruxism, with the exception of indirect monolithic Zirconia.