(2)牙龈成形器(gingival former)或愈合基台(healing abutment)： 当种植体与周围骨组织形成整合后，须进行第二次手术，以充分暴露种植体上缘。
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Conclusion: Both gingivectomy and prolongation of dental crown could shorten the depths of the gingival pocket. The clinical effect of the latter is better than that of the former.
结论：牙龈切除术与牙冠延长术应用于牙体劈裂达龈下较深部位患牙均能明显改善龈袋深度，而后者的临床疗效优于前者。
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