XP-endo Shaper和ProTaper Next对弯曲根管成形能力及微裂纹形成的影响  

Comparative study of two novel nickel-titanium instruments for root canal preparation in curved canals on shaping ability and microcrack formation

作　　者：封菲[1,2] 曹立群 张旗[1] FENG Fei;CAO Li-qun;ZHANG Qi(Department of Dentistry and Endodontics,School of Stomatology,Tongji University,Shanghai Engineering Research Center for Dental Tissue Regeneration and Restoration,Shanghai 200072;Department of Dentistry and Endodontics,Shanghai Stomatology Hospital&School of Stomatology,Fudan University,Shanghai Key Laboratory of Craniomaxillofacial Development and Disease,Fudan University,Shanghai 200031,China)

机构地区：[1]同济大学口腔医学院牙体牙髓病学教研室,上海牙组织再生与修复工程技术研究中心,上海200072 [2]上海市口腔医院牙体牙髓病科,上海市颅颌面发育与疾病重点实验室,上海200031

出　　处：《上海口腔医学》2023年第3期225-229,共5页Shanghai Journal of Stomatology

基　　金：国家自然科学基金(81870760、81570966);中央高校基本科研业务费专项资金(22120190217)。

摘　　要：目的:运用显微CT(Micro-CT)评价ProTaper Next(PTN)和XP-endo Shaper(XPS)对弯曲根管成形能力及微裂纹形成的影响。方法:收集16颗2个独立近中根管的下颌磨牙,共32个根管,弯曲度为25°~35°。采用2种新型镍钛器械(PTN和XPS)进行预备,记录预备时间。预备前、后用Micro-CT扫描,并进行三维重建,对根管偏移、轴中心率、体积增加量、管/根宽度比和微裂纹发生率进行分析。采用SPSS 22.0软件包对数据进行统计学分析。结果:预备后XPS组在距根尖1、3、5、7 mm水平根管偏移较PTN组小,在1、3、7 mm水平轴中心率较PTN高,具有统计学差异(P<0.05),轴中心率在5 mm水平两者无显著性差异(P>0.05)。XPS组预备时间显著少于PTN组(P<0.05)。2种器械预备后体积增加量、管/根宽度比无显著差异(P>0.05)。2种器械预备后均无新裂纹产生。结论:PTN与XPS均能安全、有效预备下颌磨牙重度弯曲根管,而XPS在预备成形方面具有更好的中心定位性及更高的预备效率。PURPOSE:To evaluate the shaping ability and microcrack formation of ProTaper Next(PTN)and XP-endo Shaper(XPS)systems in the mesial curved root canals of mandibular molars by using micro-CT scans.METHODS:Sixteen mandibular molars with two independent mesial root canals and curvature ranging from 25°to 35°were randomly divided into two groups.The preparation time was recorded.Pre-and-postoperative images were scanned by micro-CT.The following parameters were evaluated:canal transportation,centering ratio,changes in canal volume,canal/root width ratio and microcrack formation.SPSS 22.0 software package was used to analyze the data.RESULTS:Significant difference(P<0.05)was found for canal transportation at the section of 1,3,5,7 mm from the apical foramen and centering ratio at the section of 1,3,7 mm from the apical foramen,where XPS files were superior.There was no significant difference for centering ratio at the section of 5 mm from the apical foramen(P>0.05).XPS groups significantly consumed less time during the preparation(P<0.05).There was no significant difference between the two groups for the increase amount of volume,and canal/root width ratio(P>0.05).Both instruments did not induce new microcrack after preparation.CONCLUSIONS:PTN and XPS can both shape curved canals effectively and safely.XPS showed better centering ability and reduced preparation time during preparation.

关 键 词：新型镍钛器械 弯曲根管 根管预备 成形能力 微裂纹 

分 类 号：R781.3[医药卫生—口腔医学]