超声骨刀在下颌磨牙分根术及半切术中的应用

Application of the Piezosurgery Device in Root Separation and Tooth Hemisection

目的:评价应用超声骨刀进行分根术及半切术后行桩核冠桥修复的临床疗效。方法:临床选择符合条件的27颗下颌磨牙进行完善的根管治疗后应用超声骨刀行分根术或半切术,必要时做冠延长术,根分叉有炎症先行牙周治疗,而后做桩核联冠或固定桥修复。随访2年。结果:除一颗患牙牙周炎进展导致牙周脓肿松动拔除外,其余26颗患牙均能保持良好的咀嚼功能,患者主观感受无明显不适,X片示牙槽骨无明显吸收或少量增生。结论:应用超声骨刀行牙分根术及半切术联合冠桥修复对治疗严重缺损下颌磨牙具有良好的临床效果。

Objective： To evaluate the clinical effects of application of the piezosurgery device in root separation and tooth hemisection combined with dowel crown or fixed bridge. Methods.. Totally 27 mandibular molars agreed with the criteria we set were selected. Root separation, tooth hemisection, crown lengthening and furcation involvement therapy when needed were performed with piezosurgery device after consummate root canal therapy. Then post and core were restored and combined crowns or bridges were made. All the cases were followed up for 2 years. Results： All of the teeth functioned well except one failed in progress of periodontitis. X-ray shows no obvious alveolar bone loss. Conclusion： A satisfactory treatment effects could be achieved by using the piezosurgery device in root separation and tooth hemisection combined with dowel crown or fixed bridge to save mandibular molars with severe defect.