4种机用镍钛器械预备树脂模拟弯曲根管成形能力比较  

Comparison of the abillity of four different kinds of nickel-titanium instruments to prepare simulated resin to simulate curved root canal forming

作　　者：梁昭璜 张瑶[1] LIANG Zhao-huang;ZHANG Yao(Department of General Dentistry and Inte-grated Emergency Denta Care,Beijing Stomatological Hospital,School of Stomatology,Capial Medical Unirersity,Beijing 100050,China)

机构地区：[1]首都医科大学附属北京口腔医院急诊综合诊疗中心,北京100050

出　　处：《上海口腔医学》2024年第1期54-58,共5页Shanghai Journal of Stomatology

摘　　要：目的:比较4种机用镍钛器械预备树脂模拟弯曲根管的成形能力。方法 :40个单弯树脂模拟根管随机分成为4组,每组10个,采用4种机用镍钛器械(ProTaper、HyFlex EDM、WaveOne Gold和Reciproc Blue)进行根管预备,分别记为A组、B组、C组和D组。比较4组预备时间,经计算机图像分析软件对预备前后根管图像进行分析,记录4组根管预备时间及根管弯曲度、弯曲半径的变化情况。以根尖为圆心,1~10 mm分别为半径,作同心圆弧线,检测点即重叠根管交点,记录不同检测点的根管内外侧壁树脂去除量与中心定位力。采用SPSS 20.0软件包对数据进行统计学分析。结果:A组根管预备时间显著长于B、C和D组(P<0.05),但4组根管弯曲度、弯曲半径变化无显著差异(P>0.05)。C组检测点至根尖孔距离5、6、8、9、10 mm的根管内侧壁树脂去除量显著低于A、B和D组(P<0.05),C组检测点至根尖孔距离5、6、7、9、10 mm的根管外侧壁树脂去除量显著低于A、B和D组(P<0.05),A组检测点至根尖孔距离1、2、3、4、6、7、8、9、10 mm的根尖偏移显著大于B、C和D组(P<0.05)。结论:4种器械中,ProTaper根尖偏移最大,HyFlex EDM、WaveOne Gold和Reciproc Blue根管成形能力相对更好。PURPOSE:To compare the forming ability of four kinds of nickel-titanium instrument preparation resin for simulated curved root canal.METHODS:A total of 40 single bend resin simulated root canals were randomly divided in-to 4 groups with 10 in each group.Four kinds of nickel-titan ium instruments(ProTaper,HyFlex EDM,WaveOne Gold and Reciproe Blue)were used for root canal preparation,and divided into group A,group B,group C and group D.The prepa-ration time of the four groups was compared,the root canal images before and after preparation were analyzed by comput-er image analysis software,and the changes of the preparation time,curvature and curvature radius of the four groups were recorded.With the root tip as the center of the circle,the radius of 1-10 mm was selected as concentrie circle arcs.The detection points were overlapping root canal intersection points.The resin removal amount and center positioning force of the inner and outer walls of the root canal at different detection points were recorded.Statistical analysis was performed with SPSS 20.0 software package.RESULTS:The root canal preparation time in group A was signifcant longer than that in group B,C and D(P<0.05),but there was no signifcant dfference in the curvature and curvature radius of the root canal among the four groups(P>0.05).The removal amount of resin from the root canal wall in group C was significant lower than that in group A,B and D(P<0.05)when the distance from the detection point to the apical foramina was 5,6,8,9 and 10 mm,respectively.The removal amount of resin from the outer wall of the root canal in group C was significant lower than that in group A,B and D(P<0.05)when the distance from the detetion point to the apical foramina was 5,6,7,9 and 10 mm,respectively.The root tip offset of group A from the delection point to the apical holeof 1,2,3,4,6,7,8,9 and 10 mm was significant greater than that of group B,C and D(P<0.05).CONCLUSIONS:Among the four instru-ments,ProTaper has the largest apical deviation,HvFlex EDM,WaveOne Gold

关 键 词：根管预备 机用镍钛器械 成形能力 中心定位力 

分 类 号：R781.05[医药卫生—口腔医学]