目的：比较杆卡、球帽、 locator附着体种植覆盖义齿修复1~3年后的临床效果。方法：对38名无牙颌患者进行覆盖义齿修复，其中杆卡、球帽、 locator附着体种植覆盖义齿分别为11、18和9例。在义齿完成后0.5、1年及每年复查1次。对各组种植体周围粘膜状况和边缘骨吸收（MBL）进行评估，同时检验患者满意度。结果：杆卡、球帽、 locator附着体最近一次随访的种植体边缘骨吸收为（1.3±1.0）mm、(1.2±0．8)mm、（1.4±1.0） mm，3种方式修复后MBL比较无统计学意义(P＞0.05)。与原有全口义齿比较，患者满意度均有明显提升（P<0.05）。三种义齿间种植体周围粘膜状况、患者满意度亦无统计学差异。结论：杆卡、球帽、 locator附着体种植覆盖义齿均能明显改善无牙颌患者的咀嚼功能。出于经济学考虑，我们建议选用2枚种植体支持的球帽或locator附着体覆盖义齿，临床上角度偏差较大的种植体可以优先考虑locator附着体覆盖义齿修复。%Obiective: The aim was to compare the treatment outcome of implant -supported overdentures retained with bar-clip, ball-cap or locator attachments. Methods: Thirty-eight edentulous patients treated, eleven patients were treated with an overdenture supported by bar-clip attachment, eighteen patients were treated with an overdenture supported by ball-cap attachment and nine patients were treated with an overdenture supported by locator attachment. Standardised clinical and radio-graphic parameters were evaluated 0.5 year after completion of the prosthetic treatment and after each year of functional loading. patient satisfaction was scorded during the evaluated period, too. Results:The latest-evaluated bone loss was 1.3±1.0mm、 1.2±0.8mm、 1.4±1.0mm in overdentures retained with bar-clip, ball-cap or locator attachments, respectively. No significant differences in bone loss were ob-served among groups (P>0.05). The functional complaints had significantly improved (P<0.05). There were no statistically significant differences with regard to any of the studied clinical or satisfaction pa-rameters among the groups. Conclusion: all overdentures can improve masticatory function of edentu-lous patients. For reasons of cost-effectiveness, a two-implant overdenture retained with ball-cap or lo-cator attachments is advised for patients, and overdenture retained with locator attachments is advised for implant with large angulations.
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