Saritha S, Uloopi K S, Vinay C, Chandra Sekhar R, Rao V V
Dept Paediatric Dentistry, Vishnu Dental College, Bhimavaram - 534202, Andhra Pradesh, India.
Eur Arch Paediatr Dent. 2012 Feb;13(1):32-5. doi: 10.1007/BF03262838.
To evaluate the accuracy of Root ZX II electronic apex locator (EAL) for root canal working length determination in primary teeth.
Forty primary maxillary incisor teeth were included in the study. Root ZX II EAL was used to determine the electronic working length (EL). The working length obtained with EAL was evaluated using digital radiography with the measuring file set to EL. The samples were categorised into three groups. Group 1 (acceptable): file tip 0-1mm short of the radiographic apex; Group 2 (short): file tip > 1mm short of the apex and Group 3 (long): file tip beyond the apex. Digital radiographic working length (RL) was derived by adjusting EL to the radiographic apex. The assigned calibrations were tabulated and statistically analysed.
Group 1 included 28 out of 40 teeth indicating a clinical accuracy of 70%. Group 2 contained 10 (25%) teeth whereas group 3 had only 2 (5%) teeth.
Pearson correlation coefficient statistical analysis showed a high correlation (r = +0.82; p<0.001) among the groups.
Root ZX II EAL can be used as a reliable device for obtaining root canal length in primary maxillary incisor teeth.
评估Root ZX II电子根尖定位仪（EAL）在确定乳牙根尖工作长度方面的准确性。
本研究纳入40颗上颌乳切牙。使用Root ZX II EAL确定电子工作长度（EL）。将测量锉设置为EL，通过数字放射成像评估EAL获得的工作长度。样本分为三组。第1组（可接受）：锉尖距离根尖影像0-1mm；第2组（短）：锉尖距离根尖超过1mm；第3组（长）：锉尖超出根尖。通过将EL调整至根尖影像来得出数字放射成像工作长度（RL）。将指定的校准结果制成表格并进行统计分析。
40颗牙齿中有28颗属于第1组，临床准确率为70%。第2组有10颗（25%）牙齿，而第3组仅有2颗（5%）牙齿。
Pearson相关系数统计分析显示各组之间存在高度相关性（r = +0.82；p<0.001）。
Root ZX II EAL可作为一种可靠的器械用于获取上颌乳切牙的根管长度。
