关键词: 上颌窦内提升, 牙种植, 边缘骨吸收, 根尖骨高度

Abstract:

Objective　To evaluate the clinical effect of maxillary sinus lifting，bone graft，and simultaneously placement of implants in severely atrophic maxillae and the stability of cylindrical implants. Methods　Totally 20 patients with 30 Straumann tissue-level implants were included. After osteotome sinus floor elevation and grafting，implants were inserted. Patients were recalled at 1 and 3-years follow-up. Implant success，resonance frequency analysis，clinical and radiographic outcomes were recorded. Results　At 3-year examination，the implant success rate was 96.7%. The ISQ value was 71.1±4.15、69.6 ± 5.01、68.4 ± 4.34 and 72.8 ± 6.42 at implant insertion，2，4 and 12 weeks after surgery. Modified bleeding index was 0.53 ± 0.40 and 0.61 ± 0.31 at 1 and 3-year examination. Probing depth was（3.21 ± 0.67）mm and（3.45 ± 0.71）mm at 1 and 3-year examination. Modified plaque index was 0.48 ± 0.44 and 0.52 ± 0.51 at 1 and 3-year examination. No significant difference was found between two examinations. Marginal bone loss increased from （1.16 ± 0.27）mm at 1-year follow-up to （1.45 ± 0.39） mm at 3-year follow-up，the difference reached statistically significant（P < 0.05）. Implant apex height decreased from （2.05 ± 0.43）mm at baseline to （1.85 ± 0.75）mm at 1-year and （1.42 ± 0.69）mm at 3-year follow-up，the difference reached statistically significant（P < 0.05）. Conclusion　Maxillary sinus lifting，bone graft，and simultaneously placement of implants could be a predicable treatment option in severely atrophic maxilla. In addition，cylindrical implants could achieve enough stability during the healing phrase. High success rate could be achieved in the short term.

Key words: maxillary sinus lifting, teeth implant, marginal bone loss, apical bone height