Bolbolian Marjan, Golchin Siamak, Faegh Seyedmatin
Assistant Professor of Endodontics, Dental Caries Prevention Research Center, Qazvin University of Medical Science, Qazvin, Iran.
General Dentist, Student Research Committee, Qazvin University of Medical Sciences, Qazvin, Iran.
J Clin Exp Dent. 2018 Nov 1;10(11):e1054-e1057. doi: 10.4317/jced.54193. eCollection 2018 Nov.
Establishing the working length at the apical constriction is considered ideal for root canal therapy. Because of the limitations of radiography and complicacy of the apex of the root, electronic measurement of canal length has become valuable for endodontic treatment. This study was designed to evaluation of the accuracy of the Root zx electronic apex locator in the presence of NaOCl 2.5% and chlorhexidine 0.2%.
Thirty extracted human premolars with complete root formation were enrolled. The actual length (AL) was assessed visually (under stereo microscope) and teeth mounted in the saline model. The electronic length (EL) measurements were recorded in the presence of NaOCl 2.5% and chlorhexidine 0.2% and the differences between the EL and AL were compared.
By accepting the error of 0.5 and 1 mm, the accuracy of Root zx was 76.7% and 96.7% in the presence of chlorhexidine 0.2% and 90% and 100% in the presence of NaOCl 2.5%, respectively. No statistical differences was found between the measured groups (=0.223).
Our results confirmed that Root zx can accurately determine the apical constriction in presence of both NaOCl 2.5% and chlorhexidine 0.2%. Chlorhexidine, Sodium Hypochlorite, Root ZX.
在根尖狭窄处确定工作长度被认为是根管治疗的理想方法。由于影像学的局限性和根尖的复杂性，根管长度的电子测量对于牙髓治疗变得很有价值。本研究旨在评估在2.5%次氯酸钠（NaOCl）和0.2%氯己定存在的情况下Root zx电子根尖定位仪的准确性。
纳入30颗牙根完全形成的拔除人类前磨牙。实际长度（AL）通过肉眼（在体视显微镜下）评估，并将牙齿安装在盐水模型中。在2.5% NaOCl和0.2%氯己定存在的情况下记录电子长度（EL）测量值，并比较EL和AL之间的差异。
在接受0.5毫米和1毫米的误差时，在0.2%氯己定存在的情况下，Root zx的准确率分别为76.7%和96.7%；在2.5% NaOCl存在的情况下，准确率分别为90%和100%。测量组之间未发现统计学差异（P=0.223）。
我们的结果证实，在2.5% NaOCl和0.2%氯己定存在的情况下，Root zx都能准确确定根尖狭窄处。氯己定、次氯酸钠、Root ZX。
