Objective: to study on retention force of dentures with various amount and distribution of attachments, provided reference to clinic use.
目的：对不同数量及分布的钉帽附着体固位力进行测试，为临床应用提供参考依据。
Retention force of 10 teeth are measured by using biomechanical method.
通过生物力学的方法测定10颗离体牙充填物的抗拉力强度。
In the same subjects and different force direction, the retention forces of 3 successive measurements were significantly different (P<0.05).
相同受试者，不同施力角度，测量结果差异具有显著性（P<0.05）。
Conclusion: the number, site and dislocation direction of the attachment affect retention force of bar-clip implant overdenture.
结论：种植杆卡式固位体的数量，位置及脱位力方向对种植覆盖全口义齿的固位力都有一定影响。
Conclusion: the number, site and dislocation direction of the attachment affect retention force of bar-clip implant overdenture.
结论：种植杆卡式固位体的数量，位置及脱位力方向对种植覆盖全口义齿的固位力都有一定影响。
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