Abstract:

Objective To evaluate the clinical effects of mineral trioxide aggregate (MTA) as apulp-dressing agent in immature permanent anterior teeth. Methods 68 perma nent anterior teeth with deep caries or accidental pulp exposure were randomly divided into treatment group (MTA) and control group (calcium hydroxide). The exposed pulps were treated permanently with direct pulp capping. The effect of potential clinical variables on the treatment outcome was evaluated clinically and radiographically during a 24-month follow-up. In order to assess the cumulative successes, data were analyzed with chi-square test and log-rank test (α= 0.05). Results The successful rate of the treatment group (91.4%) was higher than that of the control group (60.6%) significantly (P < 0.05). None of the gender, occlusal site, type of pulp exposure, site and diameter of pulp exposure had a considerable influence on the outcome (P > 0.05). Conclusion MTA as a biocompatable, osteogenesis-inducing and inflammation-controlling material appears to be suitable for direct pulp capping.

Key words: Mineral trioxide aggregate, Calcium hydroxide, Direct pulp capping, Reparative dentin, Vital pulp therapy

摘要：

目的 观察三氧化矿物聚合体（mineral trioxide aggregate,MTA）应用于年轻恒前牙意外露髓时直接盖髓术的临床效果,分析影响疗效的因素。方法 上、下颌恒前牙意外露髓病例64例,68颗患牙,随机分为试验组和对照组,分别用MTA 和氢氧化钙进行直接盖髓,术后定期复查,观察24个月,对盖髓术后活髓保存成功率进行统计学分析。结果 试验组成功率为91.4%,对照组成功率为60.6%,2组比较差异具有统计学意义（P < 0.05）;性别、颌位、露髓原因、穿孔部位、直径等因素对疗效无影响（P > 0.05）。结论 MTA是较理想的直接盖髓材料。

关键词: 三氧化矿物凝聚体, 氢氧化钙, 直接盖髓, 修复性牙本质, 活髓保存