Application of modified lateral window for maxillary sinus floor augmentation.
- Author:
Wei LU
1
;
Mengna LIN
2
;
Shifang ZHAO
2
;
Huiming WANG
2
;
Fuming HE
3
Author Information
1. Department of Periodontology, Stomatology Hospital Affiliated to Zhejiang University School of Medicine, Hangzhou 310006, China.
2. Department of Implantology, Stomatology Hospital Affiliated to Zhejiang University School of Medicine, Hangzhou 310006, China.
3. Department of Implantology, Stomatology Hospital Affiliated to Zhejiang University School of Medicine, Hangzhou 310006, China. hfm@zju.edu.cn.
- Publication Type:Clinical Trial
- MeSH:
Dental Implantation, Endosseous;
Follow-Up Studies;
Humans;
Maxillary Sinus;
surgery;
Sinus Floor Augmentation;
methods;
Treatment Outcome
- From:
Journal of Zhejiang University. Medical sciences
2017;46(6):630-636
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To evaluate the clinical efficacy of modified lateral window for maxillary sinus floor augmentation (MSFA). Methods: Fifty-five patients who visited the Stomatology Hospital Affiliated to Zhejiang University School of Medicine between June 2012 and October 2014 were enrolled in the study. Patients underwent MSFA with Bio-Oss grafts based on modified access window. During the operation the vertical height of the bony window was reduced from 6-8 mm of conventional oval window to 4-5 mm of slot-shaped window. The sinus membrane was detached completely via the lateral access and large particle Bio-Oss graft was placed in the sub-mucosal space. The implant survival, graft height, graft volume and resorption rates were measured. Intra-op and post-op complications were recorded. Results: There were 86 implants inserted. The 2-4 year cumulative survival rates were 97.67% by implant-based analysis and 96.36% by patient-based analysis. The residual bone height was (4.7±2.6) mm and bone width was (8.4±2.7) mm. The bone height of implantation site immediately after operation was (16.1±2.5) mm and it was (16.2±2.2) mm at restoration. The bone heights at 1 and 2 years after operation were (14.9±2.5) mm and (13.6±2.6) mm, respectively. The graft height was (10.6±2.8) mm and the graft volume was (1569±745) mm3 immediately after operation. The resorption rate of graft height 6 months after operation was 3.79% and that of graft volume was 7.87%. The 1-year accumulative resorption rate of graft height was 6.63% and that of graft volume was 10.89%. The 2-year accumulative resorption rate of graft height was 7.58% and that of graft volume was 15.26%. Small membrane perforation during MSFA was observed in 5 cases and all were successfully repaired by a collagen Bio-Gide membrane. Conclusion: The modified lateral technique obtains high implant survival rate, excellent graft stability and low complication rate at 2-4 year clinical follow-up, indicating that it is a safe, predictable and minimally invasive surgical method for severe atrophic maxillary posterior dentition.
