Complications and survival rates of inlays and onlays vs complete coverage restorations: A systematic review and analysis of studies.

J Oral Rehabil 2018 Nov 13;45(11):903-920. Epub 2018 Aug 13.

Department of Prosthodontics, Division of Graduate Prosthodontics, School of Dentistry, Aristotle University of Thessaloniki, Thessaloniki, Greece.

Objective: The aim of this study was to identify if different types of indirect restorations used for single teeth had different biological and technical complications, as well as survival rates.

Method: An electronic search was performed in various electronic databases to identify articles, published between 1980 and 2017. The search terms were categorised into 4 groups: inlay, onlay, inlay/onlay and crown. Manual searches of published full-text articles and related reviews were also performed.

Results: A total number of 2849 papers were retrieved initially. After a detailed assessment for eligibility, 9 studies were selected for inclusion. The heterogeneity of the studies did allow neither a meta-analysis nor any meaningful comparison between types of restorations or materials. Only some pooling was performed for representative reasons. The mean survival rate of inlays was 90.89%, while for onlays and crowns it was 93.50% and 95.38%, respectively. For the fourth study group, consisting of both inlays and onlays, the survival rate was found to be 99.43%. Statistical analysis demonstrated caries to be the main biological complication for all types of restorations, followed by a root and/or tooth fracture incidence (11.34%) and endodontic incidence. Ceramic fractures represented the most common technical complication, followed by loss of retention and porcelain chipping.

Conclusion: The 5-year survival rate for crowns and inlays/onlays is very high, exceeding 90%. An association between the kind of complications and different types of restorations could not be established. Nevertheless, a relatively high failure rate due to caries and ceramic fractures was noted.

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Source
http://doi.wiley.com/10.1111/joor.12695
Publisher Site
http://dx.doi.org/10.1111/joor.12695DOI Listing
November 2018
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