不同镍钛预备器械对根尖溢出碎屑影响的体外研究  

Effect of various nickel-titanium instruments on apically extruded debris:An in vitro study

作　　者：张凌[1] 石飞 朱琳琳[1] 张梦龙[1] 

机构地区：[1]中国医科大学口腔医学院.附属口腔医院牙体牙髓病科,沈阳110002 [2]中国南方航空北方分公司后勤保障部航医室,沈阳110043

出　　处：《中国实用口腔科杂志》2015年第10期616-618,共3页Chinese Journal of Practical Stomatology

摘　　要：目的 比较3种机用镍钛器械预备根管对根尖溢出碎屑的影响.方法 选择2012年6月至2014年12月在中国医科大学附属口腔医院就诊的15 ～ 25岁患者因正畸需要而拔除的健康单根管前磨牙68颗,随机分为对照组、机用ProTaper组、Waveone组和Mtwo组,每组17颗.分别采用手用ProTaper镍钛锉、ProTaper机用镍钛锉、Waveone机用镍钛锉及Mtwo机用镍钛锉预备根管并冲洗根管,收集器械预备过程中的根尖溢出液,采用紫外可见分光光度计检测各组冲洗后根尖溢出液的光密度（OD）值,相对比较其根尖溢出碎屑的含量,分析不同机用镍钛器械预备根管对根尖溢出碎屑产生的影响.结果 各组根尖溢出液OD值：对照组为68.65±11.47;机用ProTaper 组为62.66±11.17、Waveone组为58.49±12.96、Mtwo组为47.70±10.28.除了机用ProTaper组与对照组间以及Waveone组与机用ProTaper组间差异无统计学意义外,其他各组间差异均有统计学意义（均P＜0.05）.结论 使用Mtwo镍钛器械预备根管产生的根尖溢出碎屑明显少于ProTaper和Waveone镍钛器械.To compare the amount of apically extruded debris from root canals when different nickel-titanium instruments were used. Methods Sixty-eight healthy single-rooted premolar teeth extracted for orthodontic purpose were in- duded in the study. The teeth were randomly divided into the control group （hand ProTaper）and 3 experimental groups. Three kinds of nickel-titanium instruments were used（rotary ProTaper, Waveone and Mtwo; n = 17）. Debris extruded from the apical foramen after root canal preparation was collected into tubes and the amount of apically extruded debris was determined and analyzed. Results The OD values of apically extruded debris ： in the control group it was 68.65 ±11.47; in rotary ProTaper group it was 62.66 ± 11.17; in Waveone group it was 58.49±12.96; in Mtwo group it was 47.70 ±10.28. Waveone group and Mtwo group had less extruded debris, which was significantly different from the control group （P 〈 0.05 ）. Mtwo group had the least of extruded debris, which was significantly different from the other groups （P 〈 0.05）. Conclusion Mtwo nickel-titanium instruments produce obviously less apically extruded debris than Pro- Taper and Waveone.

关 键 词：根尖溢出碎屑 根管预备 镍钛器械 

分 类 号：R78[医药卫生—口腔医学]