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目的 :探讨自攻自断螺纹钉在大面积缺损牙保存性修复中的应用。方法 :采用自攻自断螺纹钉 ,选择凡因龋坏或者外伤使牙体组织损失残缺过大、牙髓未露、活力正常的牙进行修复。结果 :本组 5 0例经自攻自断螺纹钉进行固位修复 ,5年后随访 42例 ,除 2例因上颌磨牙牙尖折断而不能修复拔除外 ,其它 40例均达到评判标准 ,总成功率达 95 %。结论 :自攻自断螺纹钉主要用于对严重缺损而牙髓健康的牙进行保存性修复 ,还可对要做壳冠修复的牙进行牙壁加固。该方法因材料来源方便 ,临床效果显著 ,值得推广。
Objective: To investigate the application of self-tapping and self-destructing thread nail in the preservation of large defect. Methods: Self-tapping screw off the nail, choose where due to caries or trauma so that the loss of tooth tissue is too large, dental pulp is not exposed, vitality of normal teeth to repair. Results: Fifty patients underwent self-tapping and self-destructive screw fixation and 42 patients were followed up 5 years later. Except for 2 cases, the maxillary molars could not be repaired by cusp tip incision and the other 40 patients met the criteria. Success rate of 95%. Conclusion: Self-tapping screw is mainly used for preserving the dental pulp of serious defects and preserving the dental pulp. The method is convenient because of the material source, the clinical effect is significant, it is worth to promote.