切髓术与根尖诱导成形术中矿物三氧化聚合物的应用及护理配合

摘要

目的 探讨矿物三氧化聚合物(MTA)在年轻恒牙行切髓术或根尖诱导成形术中的应用及护理配合.方法 对96例9～16岁患者共98颗有牙髓病变、牙根发育未完伞的患牙纳入研究,分为MTA组和氢氧化钙组(对照组),分别用MTA和氰氧化钙作为盖髓剂或诱导剂对患牙进行切髓术或根尖诱导成形术,术后随访1年.观察各组活髓牙在切髓术后的活髓保存率、死髓牙在根尖诱导成形术后根尖孔关闭率,并进行组间比较.结果 MTA组活髓保存成功率达100%,根尖孔关闭(钙化屏障形成)率为94%,对照组为66.7%和58.8%,两组差异有统计学意义(P＜0.05).结论 牙髓病治疗新材料MTA用于盖髓和诱导根尖成彤的疗效确切,优于传统材料氢氧化钙;护理配合要点是严格执行无菌操作原则、熟悉新材料的特性和调拌方法.%Objective To evaluate the application and nursing cooperation of mineral trioxideaggregate (MTA) in pulpotomy and apexification of young permanent teeth. Methods 98 teeth with pulpillness and immature root were collected in the patients between the ages of 9 and 16 years, and then weredivided into MTA group and calcium hydroxide group (control group). MTA or calcium hydroxide wereapplied as pulp-capping or inducer for pulpotomy or apexifieation in the two groups respectively. One yearfollow-up was carried out after operation. The rates of pulp survival and apex closure were observed in eachgroup and then compared between the groups. Results The rates of pulp survival and apex closure in theMTA group were 100% and 94%, both significantly higher than those in the calcium hydroxide group(allP＜0.05). Conclusions The therapeutical effects of MTA application for pulpotomy and apexification wereremarkable, superior to those of traditional calcium hydroxide. The key point to nursing is to strictly performan aseptic manipulation and have an intimate knowledge of characteristics of MTA and its mixing.