Does Bruxism Contribute to Dental Implant Failure? A Systematic Review and Meta-Analysis.
BACKGROUND
Bruxism was usually considered as a contraindication for oral implanting. The causal relationship between bruxism and dental implant failure was remained controversial in existing literatures.


OBJECTIVE
This meta-analysis was performed to investigate the relationship between them.


METHODS
This review conducted an electronic systematic literature search in MEDLINE (PubMed) and EmBase in November 2013 without time and language restrictions. Meanwhile, a hand searching for all the relevant references of included studies was also conducted. Study information extraction and methodological quality assessments were accomplished by two reviewers independently. A discussion ensued if any disagreement occurred, and unresolved issues were solved by consulting a third reviewer. Methodological quality was assessed by using the Newcastle-Ottawa Scale tool. Odds ratio (OR) with 95% confidence interval (CI) was pooled to estimate the relative effect of bruxism on dental implant failures. Fixed effects model was used initially; if the heterogeneity was high, random effects model was chosen for meta-analysis. Statistical analyses were carried out by using Review Manager 5.1.


RESULTS
In this meta-analysis review, extracted data were classified into two groups based on different units. Units were based on the number of prostheses (group A) and the number of patients (group B). In group A, the total pooled OR of bruxers versus nonbruxers for all subgroups was 4.72 (95% CI: 2.66-8.36, p = .07). In group B, the total pooled OR of bruxers versus nonbruxers for all subgroups was 3.83 (95% CI: 2.12-6.94, p = .22).


CONCLUSIONS
This meta-analysis was performed to evaluate the relationship between bruxism and dental implant failure. In contrast to nonbruxers, prostheses in bruxers had a higher failure rate. It suggests that bruxism is a contributing factor of causing the occurrence of dental implant technical/biological complications and plays a role in dental implant failure.
The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China.
Yi
Y
Zhou
Department of Prosthodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, China.
Jinxia
J
Gao
School of Public Health, Wuhan University, Wuhan, China.
Le
L
Luo
Department of Prosthodontics, School and Hospital of Stomatology, Wuhan University, Wuhan, China.
Yining
Y
Wang
D002012:Bruxism; D015921:Dental Implants; D019232:Dental Restoration Failure; D006801:Humans
D015921:Dental Implants
bruxism; complication; dental implant; implant failure; teeth grinding