牙半切除术后全冠修复的疗效观察

目的　观察牙半切除术后剩余牙体全冠修复的治疗效果。方法　选择隐裂、根折或根分叉病变患者 ,对欲保留牙根进行根管治疗后 ,行半牙切除术。 3～ 6个月后全冠修复剩余牙体。结果　 18例中 ,成功 8例 ,有效 4例 ,失败 6例 ,4例上颌第一磨牙全部失败。失败病例X线片显示根尖无明显阴影或原根尖阴影无明显扩大 ,但牙槽骨吸收明显 ,多已大于 1/ 2 ,牙周间隙显著增宽。结论　严格选择病例 ,合理设计修复体 ,半切术后剩余牙体仍可采用相当于单端固定桥的全冠修复方法。

Effects of Full Crown Prosthesis after Hemisection

Objective To evaluate the effects of full crown prosthesis after hemisection. Methods Hemisections were performed on reserved canals of incomplete tooth fracture, complete root fracture and furcation involvement after root canal therapy. 3～6 months later, full crown prosthesises were performed. Results Among 18 cases, 8 cases were successful, 4 cases were effective and 6 cases were failures. The X ray of failure cases showed that resorption of alveolar bone was observed significantly instead of shade of root tip on failure cases. Conclusion With strict case selection, reasonable prosthesis design, full crown prosthesis should be effective after hemisections.