de Vasconcelos Bruno Carvalho, do Vale Tainá Macedo, de Menezes Antônio Sérgio Teixeira, Pinheiro-Junior Elilton Cavalcante, Vivacqua-Gomes Nilton, Bernardes Ricardo Affonso, Hungaro Duarte Marco Antonio
School of Dentistry of Sobral, Federal University of Ceará, Fortaleza, Ceará, Brazil.
Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2010 Aug;110(2):e57-61. doi: 10.1016/j.tripleo.2010.03.005. Epub 2010 Jun 23.
The aim of this study was to evaluate the precision of working length determination of 3 electronic apex locators (EALs): Root ZX, RomiApex D-30, and Ipex at 0.0 mm, at the apical foramen (AF), and at 1.0 mm short of the AF.
Thirty-eight mandibular premolars had their real lengths previously determined. Electronic measurements were determined at 1.0 mm, followed by measurements at 0.0 mm, performed in triplicate.
Precision of devices at 1.0 mm and 0.0 mm were: 94.7% and 97.4%, respectively (Root ZX); 78.9% and 97.4% (RomiApex D-30); and 76.3% and 97.4% (Ipex). Although no statistical differences were observed between the EALs at 0.0, at 1.0 mm Root ZX performed significantly better than the others.
The EALs had acceptable precision when measuring the working length at the AF. However, when used at levels short of the AF, only Root ZX did not suffer a significant negative effect on precision.
本研究旨在评估3种电子根尖定位仪（EALs）：Root ZX、RomiApex D - 30和Ipex在距根尖孔（AF）0.0 mm、在根尖孔处以及在距根尖孔短1.0 mm处确定工作长度的精度。
38颗下颌前磨牙先前已确定其实际长度。先在距根尖孔1.0 mm处进行电子测量，然后在0.0 mm处进行测量，均重复测量3次。
各设备在1.0 mm和0.0 mm处的精度分别为：Root ZX为94.7%和97.4%；RomiApex D - 30为78.9%和97.4%；Ipex为76.3%和97.4%。尽管在0.0 mm和1.0 mm处各EALs之间未观察到统计学差异，但Root ZX在1.0 mm处的表现明显优于其他设备。
当在根尖孔处测量工作长度时，EALs具有可接受的精度。然而，当在距根尖孔短的水平使用时，只有Root ZX对精度没有显著的负面影响。
