三种连续旋转根管锉对重度弯曲根管预备能力的体外研究  

An in vitro study of the ability of three continuously rotating root canal files to prepare severely curved root ca-nals

作　　者：刘朝阳 陈盼 杨焰[1] 马净植 LIU Chao-yang;CHEN Pan;YANG Yan;MA Jing-zhi(Center of Stomatology,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology,Hubei Wuhan 430030,China;Center of Stomatology,Jingzhou Central Hospital,Hubbei Jingzhou 434020,China)

机构地区：[1]华中科技大学同济医学院附属同济医院口腔医学中心,湖北武汉430030 [2]荆州市中心医院口腔医学中心,湖北荆州434020

出　　处：《临床口腔医学杂志》2024年第5期259-263,共5页Journal of Clinical Stomatology

摘　　要：目的:通过有/无操作经验者对树脂模拟重度弯曲根管进行根管预备,评价3种连续旋转系统的镍钛器械的根管预备能力。方法:将30个重度弯曲的树脂模拟根管随机分为A、B两组,A、B组再随机分为3组(n=5),A组由有根管预备操作经验者分别使用M3-L、ProTaper Next(PTN)、TruNatomy(TN)进行根管预备,B组由无根管预备操作经验者进行根管预备,采集根管预备时间、根尖推出碎屑悬浮液的吸光度(OD值)、根管偏移量评估器械根管预备成形能力。结果:PTN组根管预备时间最长(P<0.05),且无经验者使用PTN根管预备时间更长(P<0.05);3种镍钛器械预备后均有根尖推出碎屑(P<0.05),M3-L根尖推出碎屑最少(A组:P=0.202,B组:P=0.635);TN中心定位能力最好,各观测水平均无明显根管偏移,距根尖孔7~9 mm处M3-L偏移量大于TN和PTN(P<0.05)。无经验者PTN组在根管中下段(距根尖孔1~5 mm, 7 mm)根管偏移量均明显大于有经验者(P<0.05)。结论:M3-L在根管预备时长和根尖推出碎屑量上具备一定优势,TN有最好的根管定中心能力,有经验者使用PTN能达到更好的根管预备效果。Objective:To evaluate the root canal preparation ability of three continuous rotary systems using nickel-titanium instruments on resin simulated root canals by experienced and inexperienced operators.Methods:Thirty severely curved resin simulated root canals were randomly divided into groups A and B,and each group was further randomly divided into three subgroups(n=5).Group A was prepared by an experienced operator using M3-L,ProTaper Next(PTN),and TruNatomy(TN),while an inexperienced operator prepared group B.Root canal preparation time,optical density(OD)of sus-pension fluid of apically extruded debris,and canal transportation were assessed to evaluate the preparation ability of the in-struments.Results:PTN had the longest preparation time(P<0.05),and inexperienced operators using PTN took significant-ly longer(P<0.05).All three nickel-titanium instruments resulted in debris extrusion(P<0.05),with M3-L showing the least debris extrusion(group A:P=0.202,group B:P=0.635).TN demonstrated the best centering ability,with no canal transportation observed at any level.However,at 7~9 mm from the apex,M3-L showed significantly more transportation than TN and PTN(P<0.05).In the PTN group,the inexperienced operator had significantly more transportation in the middle and apical segment(1~5 mm,7 mm)compared to the experienced operator(P<0.05).Conclusion:M3-L showed advantages in preparation time and apically extruded debris,while TN demonstrated the best centering ability.Experienced operators a-chieved better root canal preparation results with PTN.

关 键 词：镍钛器械 连续旋转 弯曲根管 根管预备 

分 类 号：R781.05[医药卫生—口腔医学] R783.1[医药卫生—临床医学]