摘要目的 无牙颌患者经“All-on-4”种植即刻修复经3年追踪观察,评价该技术的中短期临床效果.方法 选择2008年6月至2009年6月完成修复的牙列缺失患者10例共40枚种植体.分别于即刻修复后6、12个月及随后每年复诊,修复后1年及3年拍摄X线片测量种植体周围边缘骨吸收量,比较倾斜种植(20枚)与轴向种植(20枚)种植体边缘骨水平变化；观测种植体周围软组织状况.结果 1、3年种植体存留率分别为100％(40/40)和97％(37/38),修复体存留率均为100％(10/10)；1年和3年种植体周围边缘平均骨吸收量分别为(0.96±0.25)和(1.48±0.20) mm；修复后1、3年,种植体周围边缘骨吸收量倾斜种植[(0.98±0.29)、(1.51±0.22) mm]与轴向种植[(0.95±0.23)、(1.47±0.21) mm]的差异均无统计学意义(P＞0.05).种植体周围软组织健康.结论 无牙颌患者“All-on-4”即刻修复中短期临床效果满意；倾斜种植体周围骨吸收水平与轴向种植体相比,差异无统计学意义.

abstractsObjective To retrospectively evaluate the clinical and radiographic outcomes of immediately loaded full-arch fixed prostheses with All-on-4 concept after 1 year and 3 years of function.Methods A total of 40 dental implants were placed in ten edentulous patients(3 in maxilla,7 in mandible).Follow-up examinations were performed at 6 months,12 months,and thereafter every 12 months.Radiographic assessment of the marginal bone level was performed after 1 and 3 years in function.The marginal bone resorption was compared between tilted and axial implants.Results The success rate of implants was 100％ (40/40) and 97％ (37/38) after 1 and 3 years,respectively.The success rate of prostheses were both 100％.37 after 1 and 3 years.The marginal bone resorption was,on average,(0.96 ±0.25) and (1.48 ± 0.20) mm after 1 and 3 years,respectively.The difference of marginal bone resorption between tilted implants and axial implants was not statistically significant (P ＞ 0.05) after 1 year or after 3 years.Implants presented heahhy peri-implant soft tissue conditions.Conclusions The clinical outcome of edentulous immediate rehabilitation supported by 4 implants was satisfactory after 1 and 3 years in function.