The survival rate of transcrestal sinus floor elevation combined with short implants: a systematic review and meta-analysis of observational studies

Zhe-Zhen Lin; Yan-Qing Jiao; Zhang-Yan Ye; Ge-Ge Wang; Xi Ding

doi:10.1186/s40729-021-00325-y

The survival rate of transcrestal sinus floor elevation combined with short implants: a systematic review and meta-analysis of observational studies

Int J Implant Dent. 2021 May 20;7(1):41. doi: 10.1186/s40729-021-00325-y.

Authors

Zhe-Zhen Lin^#¹, Yan-Qing Jiao^#¹, Zhang-Yan Ye¹, Ge-Ge Wang¹, Xi Ding²

Affiliations

¹ Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Ouhai District, Wenzhou, 325000, Zhejiang, People's Republic of China.
² Department of Stomatology, The First Affiliated Hospital of Wenzhou Medical University, Nanbaixiang Ouhai District, Wenzhou, 325000, Zhejiang, People's Republic of China. dingxi@wzhospital.cn.

^# Contributed equally.

Abstract

Background: Currently, insufficient bone volume always occurs in the posterior maxilla which makes implantation difficult. Short implants combined with transcrestal sinus floor elevation (TSFE) may be an option to address insufficient bone volume.

Purpose: The clinical performance of short implants combined with TSFE was compared with that of conventional implants combined with TSFE according to the survival rate.

Method: In this systematic review and meta-analysis, we followed the Meta-Analysis of Observational Studies in Epidemiology (MOOSE) guidelines. Articles were identified through PubMed, Embase, the Cochrane Library, and manual searching. Eligibility criteria included clinical human studies. The quality assessment was performed according to the Strengthening the Reporting of Observational Studies in Epidemiology (STROBE) guidelines. The odds ratio (OR) with its confidence interval (CI) was considered the essential outcome for estimating the effect of short implants combined with TSFE.

Results: The registration number is INPLASY202050092. Eleven studies met the inclusion criteria, including 1 cohort study and 10 cross-sectional studies. With respect to the 1-year survival rate, no significant effect was observed between short implants (length ≤ 8 mm) and conventional implants combined with TSFE (I²=0%, OR=1.04, 95% CI: 0.55-1.96). Similarly, no difference was seen between the two groups regarding the survival rate during the healing period (I²=10%, OR=0.74, 95% CI: 0.28-1.97) and 3-year loading (OR=1.76, 95% CI: 0.65-4.74).

Conclusion: There was no evidence that the survival rate of short implants combined with TSFE was lower or higher than that of conventional implants combined with TSFE when the residual bone height was poor and the implant protrusion length of short implants was less than or similar to conventional implants. Nevertheless, the results should be interpreted cautiously due to the lack of random controlled trials in our meta-analysis.

Keywords: Dental implant; Meta-analysis; Short implant; Sinus floor augmentation.

Publication types

Meta-Analysis
Research Support, Non-U.S. Gov't
Review
Systematic Review

MeSH terms

Cohort Studies
Cross-Sectional Studies
Maxillary Sinus
Observational Studies as Topic
Sinus Floor Augmentation*
Survival Rate