Chinese Journal of Oral Implantology ›› 2025, Vol. 29 ›› Issue (6): 531-536.DOI: 10.12337/zgkqzzxzz.2024.12.011

• Key Column “Lateral Window Technique for Sinus Floor Elevation” • Previous Articles     Next Articles

Analysis of implant survival rates at different subantral residual bone heights in simultaneous implant placement with lateral window technique for sinus floor elevation

Chen Gang   

  1. Shenzhen U-Dental Clinic, Shenzhen 518000, China
  • Received:2024-09-22 Online:2025-01-02 Published:2025-01-02
  • Contact: Email: greg@u-dental.cn, Tel: 0086-755-23606799

Abstract: Objective To evaluate the impact of subantral residual bone height (SRBH) on implant survival rates during simultaneous implant placement with the lateral window technique for sinus floor elevation. Methods A retrospective cohort study was conducted on patients treated at Shenzhen U-Dental Clinic between April 2012 and April 2022. These patients, with insufficient bone volume in the maxillary posterior region, underwent the lateral window technique for sinus floor elevation with simultaneous implant placement using bovine-derived inorganic bone graft material. Secondary prosthetic restoration was performed 6 months postoperatively. Patients were divided into two groups based on SRBH: Group 1 (<3 mm) and Group 2 (≥3 mm). Postoperative complications, implant survival rates, and marginal bone loss were evaluated. Results A total of 124 patients underwent 136 maxillary sinus surgeries with 252 implants placed. The mean follow-up period was 58.1±15.8 months. Implant survival rates were 91.59% in Group 1 and 93.10% in Group 2, with no statistically significant difference between the groups. Sinus membrane perforation occurred in 27 cases (19.85%), but it was not significantly associated with implant failure. Conclusion Simultaneous implant placement with the lateral window technique for sinus floor elevation is an effective treatment for insufficient bone height in the maxillary posterior region. There is no significant correlation between SRBH and implant survival rates.

Key words: Dental implant, Sinus floor elevation, Lateral window technique, Subantral residual bone height