后牙种植义齿单冠修复两种固位方式效果的比较

A comparison of prosthetic outcome of two kind of implant-supported restoration of crown in the posterior region

目的:探讨螺丝固位与黏结固位后牙种植义齿单冠修复的临床效果。方法:选择上下颌牙列后牙缺损患者35例共48枚种植体,其中22枚采用螺丝固位修复体,26枚采用黏结固位修复体。分别于修复后12个月复诊,检测种植体周围边缘骨吸收量、改良菌斑指数(mPLI)、改良出血指数(mSBI)等临床指标以及患者对种植义齿的美观满意度。结果:螺丝固位组及黏结固位组平均种植体周围边缘骨吸收量分别为(0.486±0.011)mm和(0.465±0.008)mm;螺丝组与黏结组mPLI平均水平(P50)均为1,mSBI平均水平P50亦均为1;两组美观满意度平均得分P50为1。统计结果显示螺丝固位组与黏结固位组间种植体周围边缘骨吸收量、mPLI、mSBI以及患者满意度的差异均无统计学意义(P>0.05)。结论:后牙区螺丝固位与黏结固位种植义齿短期临床修复效果差异无统计学意义。

Aim：The purpose of this clinical study was to compare the short-term prosthetic outcomes of screw-and cement-retrained implant-supported posterior teeth restoration. Methods： A total of 48 dental implants were placed in the posterior regions of 35 partially edentulous patients.Twenty-two crowns were screw-retained,while 26 crowns were cement-reained.Peri-implant marginal bone resorption,modified plaque index（mPLI）,modified sulcus bleeding index（mSBI） and esthetic fulfillment were recorded at the 12 months recall after implant loading.Results： The mean peri-implant marginal bone loss in screw-retained group and cementretained group were（0.486±0.011）mm and（0.465±0.008）mm respectively.The differences of marginal bone resorption、mPLI、mSBI and cosmetic satisfatoriness between two groups were statistically not significant（P〉0.05）.Conclusion：the short-term clinical outcomes of implant restorations are satisfactory,either screw-retained or cement-retained.The retention patterns seem to have few influences on the prosthetic outcomes of implant-supported restorations.