牙根改形结合少量去骨:一种改良的牙冠延长术

目的:提出一种改良的牙冠延长手术方法来形成修复所需要的的生物学宽度.方法:采用一种牙根改形结合少量去骨的方法来恢复丧失的生物学宽度.7颗要求修复的患牙,均因折断面位于牙槽嵴顶以下过多而属常规牙冠延长术的禁忌证.采用上述手术方法后2个月进行了修复,定期检查牙齿松动度、菌斑指数、牙龈指数和探诊深度,并追踪观察10个月以上.结果:7例患者追踪观察平均17个月(10～31个月)后术牙牙龈健康、美观、稳定.结论:牙根改形结合少量去骨的方法作为传统牙冠延长术的一种改良,扩大了牙冠延长术的适应证,保存了更多的残根、残冠.

Root reshaping in combination of conservative osseous resection: a modified technique for surgical crown lengthening

Objective: To present a modified option to surgical crown lengthening for repair of biologic width loss. Methods: The alternative to the traditional method involves reshaping the fractured root surface in combination with conservative removal of the supporting alveolar bone to rebuild the biological width. Although these teeth were considered as not suitable for the traditional methods, 7 teeth from 7 patients with fracture surface located lower than alveolar bone crest were treated by this modified method of surgical crown lengthening. Restoration was accomplished on these teeth two month later. Periodontal index such as tooth mobility, plaque index, probing depth and bleeding index were recorded and followed up. Results: The mean follow-up period was 17 months (ranged from 10 to 31 months). Result of surgery and restoration of these 7 teeth was satisfactory. The gingival tissue remained healthy and esthetic with good function. Conclusion: This modified surgical crown lengthening can be used as an alternative to the traditional method to save more fractured teeth.