Abstract:

Objective To discuss the feasibility of wedge-shaped defect treated by self-etching adhesive and gingival retraction. Methods Totally 35 patients who had wedge-shaped defect on both sides were enrolled，one side being treated by gingival retraction and bonded with an all-in-one self-etching adhesive and the other sides boned with a total-etching adhesive. Results After filling，six teeth became more severe in the sense of coldness and hotness，2 in the experiment group and 4 in the control，which recovered after a week. In the 2-year follow-up，the success rate of the experiment group（90%）was higher then the control（40%）， with statistal difference. Conclusion Self-etching adhesive and gingival retraction can be applied to treating wedge-shaped defect.

Key words: gingival retraction, self-etching adhesive, wedge-shaped defect

摘要：

目的 探讨排龈术和自酸蚀技术联合治疗楔状缺损的可行性。方法 选择2005年1月至2006年6月大连医科大学附属第一医院口腔科初诊楔状缺损患者35例，将同一患者的两侧患牙随机分为试验组和对照组（各35颗患牙），试验组患牙使用排龈线排龈，暴露龈壁后使用倒锥钻在龈牙合壁交界处和牙合壁上分别制备固位沟，用德山自酸蚀黏结系统黏结，纳米树脂充填后抛光。对照组患牙在牙合壁上预备釉质斜面，3M全酸蚀黏结，纳米树脂充填后抛光。结果 充填后有6颗患牙有冷热敏感加重症状，试验组2例，对照组4例，1周后均恢复。随访2年，试验组充填成功率（90%）明显高于对照组（40%），差异有统计学意义（P < 0.05）。结论 楔状缺损排龈后预备固位沟再用德山自酸蚀黏结，纳米树脂充填效果好。

关键词: 排龈, 自酸蚀黏结剂, 楔状缺损