激光与镍钛器械在一次性根管治疗术的联合应用

Combined Application of Laser and Nickel-titanium Instrument for One-visit Root Canal Therapy

目的:观察激光与镍钛器械联合应用于前牙慢性根尖周炎一次性根管治疗的临床效果,评价其临床应用的可行性。方法:对150例240颗慢性根尖周炎的前牙随机分为二组:实验组,123颗牙,采用镍钛旋转器械Hero642系统预备根管,Nd:YAG激光消毒,即刻完成根管充填;对照组,117颗牙,手用不锈钢器械预备根管,氢氧化钙糊剂根管封药消毒后再完成根充;对二组的根管充填质量、治疗期间的急症、术后3个月、半年、1年、2年的疗效进行比较。结果:实验组较少发生糊剂超填(P<0.05);两组的急症发生率,各阶段疗效则无明显差别。结论:激光与镍钛器械联合应用于前牙慢性根尖周炎一次性根管治疗,具有临床可行性及应用价值。

Objective： To investigate clinical efficacy of one visit root canal therapy of infected permanent anterior teeth treated by laser combined with nickel-- titanium instrument. Methods： 240 teeth of 150 patients were random ly assigned to two groups, Group experiment： 123 teeth were prepared by Hero 642 rotary Nickel--titanium instru ment and disinfected by Nd：YAG laser irradiation. Group control： 117 teeth, were prepared by K--files and disinfected by calcium hydroxide paste. The quality of root canal obturation, the incidence of EIE and the clinical outcomes in three months, six months, one year and two years after therapy were evaluated. Results： There were no significant difference of the incidence of EIE and the outcomes of different periods between two groups. The occurrences of overfilling with root canal sealers in group experiment were less than those in group control. （P〈0.05）. Conclusion： The combination of Nd：YAG laser and Nickel--titanium instruments can be used effectively for treat- ment of permanent anterior teeth with chronic apical periodontitis by one--visit root canal therapy and be worth of application.