单磨牙缺失应用双种植体修复的效果评价

Clinical evaluation of two-implant-supported single molar restoration

目的:评价应用双种植体支持义齿修复缺牙间隙较大的单磨牙缺失的临床效果。方法:对32例共38颗单磨牙缺失且间隙较大的患者,分别采用Br覿nemark和Replace种植系统进行双种植体修复。在修复完成后3个月、1a和3a进行随访,分别观察种植体及修复体的稳定性、种植体牙周状况以及种植体周围骨组织吸收量。采用SPSS13.0软件包对种植体牙周状况进行Wilcoxon符号秩检验和χ2检验;对种植体周围骨组织吸收量进行配对t检验。结果:38颗单磨牙缺失共使用76枚种植体修复,其中1枚种植体在一期种植术后2周时松动、脱落,择期再种植后无松动、脱落。76枚种植体在修复完成后3个月、1a和3a随访时均无脱落;38个修复体无松动。牙周菌斑指数、探诊出血和探诊深度在修复后3个月、1a和3a均无显著差异(P>0.05)。X线显示骨整合良好,修复完成后3个月,种植体周围骨吸收量为(0.56±0.14)mm,随后1a和3a种植体周围骨吸收趋于稳定,在原有基础上分别再吸收(0.15±0.05)mm和(0.17±0.06)mm,显著低于修复完成后3个月(P<0.05)。结论:双种植体适合间隙较大的单磨牙缺失种植修复。

PURPOSE： This study was to evaluate the clinical effect of two-implant-supported single molar restoration with wider interdental space. METHODS： 32 subjects who presented 38 single molar missing with wider interdental space were involved in this study. Two-implant-supported single molar restoration was performed with Branemark system or Replace system. The stability of the implant restoration, periodontal condition, and peri-implant bone absorption were investigated 3 months, 1 year and 3 years after restoration. The periodontal condition was analyzed by Wilcoxon signed rank test or Chi-square test and the peri-implant bone absorption was analyzed by paired t test using SPSS13.0 software package. RESULTS： Among 76 implants, one implant was lost in 2 weeks after surgery, which had been re-implanted successfully 3 months later. After loading,the survival rate of 76 implants was 100% during the next three years with perfect osseointegration. No significant differences for the plaque index, bleeding on probing, probing depth were found 3 months, 1 year and 3 years after restoration （P〉0.05）. The bone absorption of peri-implant was （0.56±0.14）mm at 3- month and stable trends were shown at 1 year （0.15 ±0.05 ）mm and 3 years （0.17±0.06）mm,both of which were significantly lower than that at 3-month （P〈0.05）. CONCLUSION： Two-implant-supported single restoration is suitable for single molar missing with wider interdental space.