使用三种不同的旋转镍钛再治疗锉后剩余牙本质厚度的评估：一项锥形束计算机断层扫描研究。

Evaluation of remaining dentin thickness following use of three different rotary nickel-titanium retreatment files: A cone-beam computed tomography study.

作者信息

Kulkarni Nishita Rajeev, Kamat Sharad Basavraj, Hugar Santosh Irappa, Nanjannawar Girish Shankar, Patil Pranav Devendra

机构信息

Department of Conservative Dentistry and Endodontics, Bharati Vidyapeeth Deemed University, Dental College and Hospital, Sangli, Maharashtra, India.

出版信息

J Conserv Dent. 2019 Nov-Dec;22(6):588-592. doi: 10.4103/JCD.JCD_269_19. Epub 2020 Aug 20.

AIM

The aim of the study is to measure the amount of remaining dentin thickness (RDT) following retreatment using three different rotary nickel-titanium (NiTi) systems.

METHODOLOGY

Mesiobuccal roots of 45 extracted maxillary first molars were prepared up to F ProTaper File and obturated. After cone-beam computed tomography (CBCT) imaging, to evaluate the obturation, the samples were randomly assigned to three retreatment groups ( = 15). Group I was retreated with ProTaper Universal retreatment kit, Group II and III with M and D-Race retreatment files, respectively. Postoperatively, all samples were subjected to CBCT imaging and evaluated with AutoCAD software (AutoDesk, Inc.) Mill Valley, California, U.S. to calculate the RDT. Data were statistically analyzed using one-way ANOVA and Tukey's tests, and the level of significance was set at = 0.05.

RESULTS

The amount of RDT was significantly more in D-Race and M groups when compared to ProTaper group.

CONCLUSION

D-Race and M instruments were associated with significantly more RDT than ProTaper.

目的

本研究的目的是使用三种不同的旋转镍钛（NiTi）系统测量再治疗后剩余牙本质厚度（RDT）。

方法

将45颗拔除的上颌第一磨牙的近中颊根预备至F ProTaper锉并进行充填。在锥形束计算机断层扫描（CBCT）成像后，为评估充填情况，将样本随机分为三个再治疗组（每组n = 15）。第一组用ProTaper通用再治疗套件进行再治疗，第二组和第三组分别用M和D-Race再治疗锉进行再治疗。术后，所有样本均进行CBCT成像，并使用美国加利福尼亚州米尔谷的AutoCAD软件（欧特克公司）进行评估以计算RDT。数据采用单因素方差分析和Tukey检验进行统计学分析，显著性水平设定为α = 0.05。