一次法磨牙根管充填治疗术的临床应用效果分析

目的对76例磨牙根管充填治疗进行回顾性研究，探讨一次法根管充填治疗磨牙慢性牙髓炎、慢性根尖周炎的方法和效果。方法将磨牙慢性牙髓炎、慢性根尖周炎（无窦型、有窦型）患者按一次法（实验组）和多次法（对照组）分为两组，实验组患者均在根管预备后引流10min、常规根管消毒30min后，以牙胶尖冷侧压法充填根管，3日、1周回访，1年复查；对照组以传统方法进行多次治疗，对照两组的治疗效果。结果实验组患者磨牙出现激惹症7例，对照组患者出现激惹症6例；一年后实验组和对照组治疗有效率分别是89．9％和92．9％，两组比较差异无统计学意义（P〉0．05）。结论熟练掌握磨牙根管的解剖形态，可以进行磨牙一次法根管充填治疗，对慢性牙髓炎、慢性根尖周炎的激惹症发生率与多次法比较差异无统计学显著性意义（P〉0．05），1年后疗效相近，远期疗效有待进一步研究。

Effect analysis on clinical application of one-visit root canal therapy on molar teeth

Objective To explore the method and the effects of one-visit root canal therapy on molar teeth through a retrospective study among 76 eases received molar teeth＇ root canal therapy. Methods Molar teeth with chronic pulpitis and periapical periodontitis （non-sinus type or sinus type） were randomized into two groups ,ie, experiment group （one-visit root canal therapy） and contrast group （multiple-visit root canal therapy）. The patients in the experiment group were drained for 10 minutes after root canal preparation, then received root canal disinfection for 30 minutes followed by filling canals by gutta pereha point with cold side pressure. The patients were reviewed three days, one week and one year after therapy. In the contrast group, the patients received multiple-visit root canal therapy. The effects were compared between the two groups. Results Challenge signs appeared in 7 cases in experiment group against 6 in the contrast. The one -year effective rates in experiment group and contrast group were 89. 9 ,% and 92. 9 % respectively. There was no significant difference between two groups （P 〉 0. 05 ）. Conclusion One-visit root canal therapy can be implemented to treat chronic pulpitis and periapical periodontitis if the doctor has a good understanding of the anatomy of molar teeth＇ root canal. There is no significant difference in the occurrence of challenge sings and one year efficacy between one-visit and multiple-visit. The long-dated efficacy is waiting for the more studies.