Saatchi Masoud, Aminozarbian Mohammad Ghasem, Hasheminia Seyed Mohsen, Mortaheb Amin
Torabinejad Dental Research Center, Department of Endodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
Torabinejad Dental Research Center, Department of Endodontics, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran.
J Endod. 2014 Mar;40(3):355-9. doi: 10.1016/j.joen.2013.11.012. Epub 2013 Dec 27.
The aim of this in vivo study was to evaluate the influence of apical periodontitis (AP) on the accuracy of Dentaport ZX (J Morita, Kyoto, Japan), Raypex 5 (VDW, Munich, Germany), and i-Root (S-Denti, Seoul, Korea) electronic root canal length measurement devices (ERCLMDs).
Thirty-two single-rooted teeth scheduled for extraction, consisting of 16 teeth with AP and 16 teeth with normal periapex (NP), were selected. The access cavity was prepared, and the coronal portion of the canal was flared. The electronic working length (EWL) was determined by each ERCLMD according to each manufacturer's instructions. Each tooth was extracted, and the actual working length (AWL) was determined by inserting a size 15 K-file until the tip could be seen at a position tangential to the major foramen and then 0.5 mm was subtracted from the measurement. The distance from the file tip (EWL) to the point 0.5 mm coronal to the major foramen (AWL) was calculated. Data were analyzed using the nonparametric Fisher exact test and the chi-square test. Statistical significance was set at P < .05.
The accuracies of Dentaport ZX, Raypex 5, and i-Root within ± 0.5 mm in the AP group were 93.8%, 81.3%, and 75.0%; they were 93.3%, 86.7%, and 73.3% in the NP group, respectively. There were no significant differences between the accuracy of each device in the 2 groups (P > .05). Considering the 2 groups of AP and NP, there were no statistically significant differences in the accuracy of the ERCLMDs (P > .05).
The presence of AP did not influence the accuracy of ERCLMDs.
本体内研究的目的是评估根尖周炎（AP）对登士柏ZX（日本京都森田公司）、瑞速德5（德国慕尼黑VDW公司）和i-Root（韩国首尔S-Denti公司）电子根管长度测量仪（ERCLMDs）准确性的影响。
选取32颗计划拔除的单根牙，其中16颗患有AP，16颗根尖正常（NP）。制备开髓腔，根管冠部进行扩管。每种ERCLMD根据各制造商的说明确定电子工作长度（EWL）。拔除每颗牙齿，通过插入15号K锉直至在主根尖孔切线位置可见锉尖，然后从测量值中减去0.5mm来确定实际工作长度（AWL）。计算从锉尖（EWL）到主根尖孔冠方0.5mm处（AWL）的距离。使用非参数Fisher精确检验和卡方检验分析数据。设定统计学显著性水平为P < 0.05。
AP组中登士柏ZX、瑞速德5和i-Root在±0.5mm范围内的准确率分别为93.8%、81.3%和75.0%；NP组中分别为93.3%、86.7%和73.3%。两组中各测量仪的准确性之间无显著差异（P > 0.05）。综合AP和NP两组，ERCLMDs的准确性无统计学显著差异（P > 0.05）。
AP的存在不影响ERCLMDs的准确性。
