MTA形成根尖屏障的疗效观察

目的:评价在手术显微镜下采用无机三氧化聚合物(mineraltrioxideaggregate,MTA)形成根尖屏障、治疗根尖孔未闭合患牙的临床疗效。方法:选取根尖孔未闭合的患牙23颗,完成根管预备后,在手术显微镜下将MTA充填于根尖1/3段,形成3～5㎜的根尖屏障,硬固后完成根管中、上段的充填及冠部修复,观察疗效。结果:所有病例在2～3周内完成根管充填,术后X线片显示16颗患牙适充,7颗超充约1～2㎜,根充致密;除失访及不能亲自前来复诊检查的患者外,其余19颗均达到成功要求,患牙无不适,瘘管闭合,无叩痛;复查X线片示根尖周病变明显缩小或消失,无新的暗影出现。结论:MTA治疗根尖孔未闭合的患牙治疗周期短,临床疗效好,少量超充不影响疗效。

Treatment of teeth with open apices using mineral trioxide aggregate as apical barrier

PURPOSE: To evaluate the clinical effect of treatment of teeth with open apices using mineral trioxide aggregate (MTA) as apical barrier under surgical operating microscope. METHODS: The root canals of 23 teeth with open apices were cleaned and shaped, and disinfected with calcium hydroxide. The MTA mixture were then carried into the apical part of the root canals to create a 3-5 mm apical barrier. The remainder of the canals were filled with AH plus and Obtura II gutta-percha. The revisit times, the period and result of the treatment were recorded for all cases. RESULTS: The treatment of all cases was accomplished within 2 or 3 weeks. Postoperative X-ray films showed that the canals of 16 teeth were obturated very well. 7 teeth showed 1-2 mm over-filling. All recalled patients declared their teeth to be asymptomatic. The recall radiographs indicated that the apical radiolucent areas of teeth with pre-existing apical lesion decreased apparently or disappeared completely. No new radiolucency was found around the roots. CONCLUSION: MTA is effective and quick in treatment of teeth with open apices, even thought there is slight over-filling of the material.