单支锉ProTaper Sx预备乳牙根管成形效果的体外研究  

Shaping effect of root canal preparation with single ProTaper Sx in primary teeth:An in vitro study

作　　者：苏雪龙 戴姗姗[1] 郭青玉[1] 刘飞[1] Su Xuelong;Dai Shanshan;Guo Qinyu;Liu Fei(Key Laboratory of Shaanxi Province for Craniofacial Precison Medicine Research,Clinical Research Center of Shaanxi Province for Dental and Maxillofacial Diseases,Department of Pediatric Dentistry,Stomatological Hospital,Xi'an Jiaotong University,Xi'an 710004,China)

机构地区：[1]西安交通大学口腔医院陕西省颅颌面精准医学研究重点实验室,陕西省牙颌面疾病临床研究中心,儿童口腔科,陕西西安710004

出　　处：《兰州大学学报（医学版）》2024年第6期49-54,61,共7页Journal of Lanzhou University（Medical Sciences）

基　　金：陕西省科技新星资助项目[(人才) 2023KJXX-034];陕西省重点研发计划一般资助项目(2024SF-YBXM-269)。

摘　　要：目的 体外比较ProTaper Sx和不锈钢K锉预备乳牙根管的成形效果。方法 收集离体乳牙,经截冠、分根后,按照近中根管、远中根管、前牙根管、腭根管、近颊根管,以及远颊根管6种根管类型各收集8个乳牙根管,共48个乳牙根管。将每种类型根管随机均匀分配至Sx组(n=24)和K锉组(n=24)。用ProTaper Sx和不锈钢K锉预备根管。预备前、后对所有样本在相同条件下行微型计算机断层扫描,经Mimics 10.01和Adobe Photoshop CC软件测量预备前、后的根管最小直径、根管弯曲度,三维重建预备前、后根管系统,评价两种器械对根管的切削部位和偏移情况。结果 两组根管最小直径改变量比较,根上1/3,Sx组明显大于K锉组;根中1/3,Sx组稍小于K锉组;根尖1/3,Sx组明显小于K锉组(P<0.05)。K锉组的根管弯曲度改变量明显大于Sx组。结论 ProTaper Sx的预备区域主要集中在根管中上段,敞口效果佳,且根管偏移小。Objective To compare the shaping effects of rotary instrument ProTaper Sx and stainless steel Kfile for root canal preparation of primary teeth in vitro.Methods Isolated deciduous teeth were collected from Pediatric Dentistry,Stomatological Hospital,Xi'an Jiaotong University.After coronal cutting and root separation,the distal root canal,proximal root canal,anterior root canal,palatal root canal,proximal buccal root canal and distal buccal root canal were classified into 8 root canals of each type,with a total of 48.The root canal types were divided into two groups,the Sx group(n=24) and the K-file group(n=24),randomly.ProTaper Sx and K-files were used for root canal preparation.Micro-computed tomography scanning was performed on the total samples before and after preparation,and the minimum diameter and curvature of root canal before and after preparation were measured with the help of Mimics 10.01 and Adobe Photoshop CC software,and 3D images of the root canal system were reconstructed.The cutting site and root canal deviation were evaluated quantitatively by their changes.Results In the coronal,the minimum diameter of root canal in the Sx group was larger than in the K-file group,and in the middle and apical,the Sx group was smaller than the K-file group,the difference being statistically significant(P<0.05).The change in the root canal curvature of the K-file group was significantly greater than that of the Sx group,with the difference being statistically significant(P<0.05).Conclusion Mechanical preparation area is mainly concentrated in the coronal and middle of the root canal and the root canal deviation is small with ProTaper Sx.

关 键 词：乳牙 根管预备 成形 根管偏移 

分 类 号：R788.5[医药卫生—口腔医学]