■在初级牙髓治疗失败的情况下,牙髓再治疗是一线治疗。尽管与诸如不完全去除堵塞材料之类的挑战有关,增加临床时间,和顶端碎片的挤压,牙髓再治疗在普通人群中仍然有相当大的成功率。
■本研究的目的是评估和比较TruNatomy的疗效,ProTaper后处理,和RaCe文件系统来移除阻塞材料,去除堵塞材料所需的时间,以及使用锥形束计算机断层扫描(CBCT)对碎片进行顶端挤压。
■体外研究。
■下颌磨牙的45个中等弯曲的近颊根被测量到#25,锥度为4%,并用生物陶瓷密封剂和侧向压实技术封闭。将牙齿随机分为三组(n=15)。用TruNatomy退牙,ProTaper后处理,还有RaCe文件系统,分别。记录治疗前和治疗后CBCT扫描,并计算去除的阻塞物质的百分比。记录除去闭塞材料和碎片的顶端挤出所花费的时间。
■描述性统计数据,包括百分比,意思是,标准偏差,Tukey的事后测试,Kruskal-Wallis测试,使用了Mann-Whitney事后检验。
■在RaCe组中,去除闭塞物质所需的总时间相对较短,其次是ProTaper再治疗组和TruNatomy组(P<0.001)。TruNatomy文件在去除闭塞材料方面明显优于ProTaper后处理文件(P=0.04)。静态,RaCe和TruNatomy文件之间没有差异。TruNatomy组的顶部挤出碎片比RaCe和ProTaper再治疗组的顶部挤出碎片多(P=0.01)。
■所有经过测试的牙髓档案均可有效去除堵塞材料,尽管没有一个可以完全去除填充材料,并且没有一个系统可以完全消除顶端挤压。
UNASSIGNED: Endodontic retreatment is the first line of treatment in cases of failed primary endodontic treatment. Although associated with challenges such as incomplete removal of obturating material, increased clinical time, and extrusion of apical debris, endodontic retreatment still has considerable success rate in the general population.
UNASSIGNED: The aim of this
study was to evaluate and compare the efficacy of TruNatomy, ProTaper retreatment, and RaCe file systems to remove the obturating material, time taken to remove the obturating material, and apical extrusion of debris using cone-beam computed tomography (CBCT).
UNASSIGNED: In vitro
study.
UNASSIGNED: Forty-five moderately curved mesiobuccal roots of the mandibular molars were instrumented up to #25, 4% taper and obturated with bioceramic sealer and lateral compaction technique. Teeth were divided randomly into three groups (n = 15). Teeth were retreated with TruNatomy, ProTaper retreatment, and RaCe file systems, respectively. Preretreatment and postretreatment CBCT scans were recorded and percentage of obturating material removed was calculated. Time taken to remove the obturating material and apical extrusion of debris was noted.
UNASSIGNED: Descriptive statistics including percentage, mean, standard deviation, Tukey\'s post hoc test, Kruskal-Wallis test, and Mann-Whitney Post hoc test were used.
UNASSIGNED: The total time needed for the removal of obturating material was comparatively shorter in the RaCe group, followed by the ProTaper retreatment group and TruNatomy group (P < 0.001). TruNatomy files were significantly better in removing the obturating material than the ProTaper retreatment files (P = 0.04). Statically, no difference between RaCe and TruNatomy files was noted. Apically extruded debris was more in the TruNatomy group than in the RaCe and ProTaper retreatment groups (P = 0.01).
UNASSIGNED: All tested endodontic files were effective in removal of obturating material, although none could completely remove the filling material and no system could completely eliminate apical extrusion.