AIM: to investigate the repairing effect and clinical significance of using the residual root for fixed bridge abutment tooth.
目的：探讨残根作为固定桥基牙的修复效果和临床意义。
It results in less bleeding, limited gingival damage during tooth preparation and clear soft tissue and abutment tooth border.
结论该技术可减少牙体预备对牙龈组织的损伤及出血；能帮助取得清晰的软硬组织界限。
AIM: to study the stress distribution of periodontal membrane of fixed abutment tooth with different thickness, and provide theoretical basis in clinic.
目的：研究固定桥基牙牙周膜厚度不同时牙周膜内的应力分布，为临床工作提供理论依据。
CONCLUSION: Residual root being used for fixed-bridge abutment tooth may reduce healthy tooth being used in abutment tooth, and it can enlarge indications of repairing fixed-bridge.
结论：利用残根作为固定桥基牙，可以减少使用健康牙作基牙，并能扩大固定桥修复的适应证。
Objective: To improve retention of complete lower denture with impacted wisdom tooth as abutment.
目的：利用阻生智齿增加下颌单颌总义齿固位力。
Objective: To improve retention of complete lower denture with impacted wisdom tooth as abutment.
目的：利用阻生智齿增加下颌单颌总义齿固位力。
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