目的评价冠外附着体义齿修复后基牙牙周的健康状况。

Objective to evaluate the abutment periodontium condition after restored with the distal-extension extracoronal attachment dentures.

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前言：目的：探讨铰链式冠外附着体的临床适用范围。

Purpose: the purpose is to discuss the clinical indications of hinge extracoronal attachment.

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结论：球帽型附着体与冠外附着体的联合设计形式具有临床实用价值。

Conclusions: Combined design of stud type attachments and extracoronal attachments had practically value in clinical appliance.

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