不同角度基台Straumann种植系统行前牙种植修复短期临床效果评价

An assessment of different angulated abutments of Straumann for implant teeth in the anterior region

目的评价不同角度基台用于前牙种植义齿修复的临床效果。方法选择2013年1月至2015年10月来齐河县人民医院口腔科接受前牙区种植修复的患者56例，共植入77颗Straumann种植体并完成单冠修复，修复完成后根据选用的基台分为直基台组（49颗）和角度基台组（28颗）。随访6—36个月，分别记录2组种植义齿机械并发症的发生情况，拍摄平行投照X线片测量种植体周围骨吸收量，采用寿命表法计算两组基台种植义齿的3年累积存留率，应用红色美学指数（pink estheticscore，PES）对上颌前牙区单牙种植修复后软组织的美学效果进行评价。应用SPSS17．0软件包对数据进行统计学分析。结果角度基台组的3年累积存留率为96．4％，直基台组为100％。种植义齿机械并发症的总体发生率为9．1％，两组基台种植义齿的机械并发症发生率及年均骨吸收量的差异均无统计学意义（均P〉0．05）。无论在基线期还是随访期，角度基台组的PES总分均明显低于直基台组（P〈0．05）。结论角度基台与直基台种植义齿修复在种植体周围骨吸收程度及机械并发症发生率方面无明显差异，前牙区种植义齿修复采用直基台的临床美学效果要优于角度基台。

Objective To evaluate clinical influence of the different angulated abutments on the implant teeth in the anterior region. Methods Totally 56 patients with 77 Straumann implants in the anterior region were followed up for 6-36 months. Implant restorations were divided into two groups according to their abutments. Cumulative survival rate was calculated by fife-table analysis. Evaluate the soft tissue around single -tooth implant in anterior maxilla with a newly developed pink esthetic score （PES）. The software of SPSS 17.0 was used for statistical analysis. Results Implant cumulative survival rate with angulated abutments was 96.4%, and with 0°abutment it was 100%. There was 9.1% biomechanical complications in 77 implants. No significant difference in annual crestal bone loss or biomechanical complications was found among 2 groups （P 〉 0.05）. The PES assessment score of prosthesis with angulated abutments was lower than that with 0°abutment in both the baseline period and follow-up period. Conclusion There is no significant difference between angulated abutments and 0°abutment in peri-implant crestal bone loss and biomeehanical complications. The clinical influence of implant restorations with 0°abutment is better than that with angulated abutments.