Objective : To investigate the clinical effects in patients with periodontal diseases after telescopic denture treatment.

目的: 考察牙周病患者经套筒冠义齿修复治疗后的临床效果.

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Objective: Observe the clinical data of the krouskronen telescope denture treatment for 5.

目的: 通过观察圆锥型套筒冠义齿对牙周病伴牙列缺损患者修复治疗前及戴用长达5.

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