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Meta-Analysis
. 2024 Nov 21;10(1):57.
doi: 10.1186/s40729-024-00573-8.

Implant-supported fixed prostheses with cantilever: a systematic review and meta-analysis

Yusuke Kondo  1   2 , Kiyoshi Sakai  3   4 , Hajime Minakuchi  3   5 , Takuya Horimai  6 , Takuo Kuboki  7   8   9 ; JSOI Clinical Guideline Working Group collaborators
Collaborators, Affiliations
Meta-Analysis

Implant-supported fixed prostheses with cantilever: a systematic review and meta-analysis

Yusuke Kondo et al. Int J Implant Dent. .

Abstract

Purpose: This systematic review (SR) aimed to investigate whether the presence of a cantilever affects the results of implant treatment for partial edentulism, including an analysis of the anterior and posterior regions of the dental arches.

Methods: An electronic search was performed, and original articles published between 1995 and November 2023 were included. The outcomes were the implant survival rate, patient satisfaction, occurrence of mechanical complications, and marginal bone loss around the implants. Two SR members independently examined the validity of the studies, extracted evidence from the included studies, and performed risk of bias assessment, comprehensive evidence evaluation, and meta-analysis.

Results: Nine studies met our inclusion criteria. Implant survival rate tended to be lower in the cantilever group, and marginal bone loss tended to be higher in the cantilever group; however, there was no significant difference. There was no significant difference in patient satisfaction based on the presence or absence of a cantilever. Moreover, the incidence of mechanical complications was significantly higher in the cantilever group. According to the analysis of anterior and posterior regions, implant survival rate tended to be lower in the cantilever group of the posterior region, and marginal bone loss around the implants tended to be higher in the cantilever group of the anterior region.

Conclusion: Implant-supported fixed prostheses with cantilevers did not negatively affect implant survival rate, marginal bone loss, or patient satisfaction. However, the incidence of mechanical complications significantly increased in the cantilever group.

Keywords: Cantilever; Fixed prostheses; Implants; Partial edentulism; Systematic review.

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Conflict of interest statement

Declarations. Consent for publication: Not applicable. Competing interests: The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Study selection flowchart
Fig. 2
Fig. 2
Forest-plot outcomes: survival of implant-retained fixed prostheses. A Overall analysis. B Anterior region analysis. C Posterior region analysis
Fig. 3
Fig. 3
Forest-plot outcomes: mechanical complication rate of implants or implant-retained fixed prostheses
Fig. 4
Fig. 4
Forest-plot outcomes: marginal bone loss around implants. A Overall analysis. B Anterior region analysis. C Posterior region analysis
Fig. 5
Fig. 5
Funnel plots of A survival of implant-retained fixed prostheses; B mechanical complication rate of implants or implant-retained fixed prostheses; and C marginal bone loss around implants. SE (log[RR]): Standard error of log risk ratio, RR: risk ratio, SE (MD): Standard error of mean difference, MD: mean difference
See this image and copyright information in PMC

References

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