Accuracy of a new apex locator: an in vitro study

Abstract

Kaufman AY, Keila S, Yoshpe M. Accuracy of a new apex locator: an in vitro study. International Endodontic Journal , 35 , 186-192, 2002. Aim The purpose of this study was to test in an in vitro model the accuracy of a Bingo 1020 electronic apex locator, to compare the results to those of a well known apex locator, Root ZX, as well as to those of the radiographic method of tooth length determination. Methodology A total of 120 extracted teeth, preserved in Thymol solution and kept refrigerated, was used for the study. The experiment was performed on singlerooted teeth and on one-root canal, chosen randomly, in multirooted teeth. The teeth were randomly divided into 12 groups of 10 teeth each. After access preparation, the actual length (AL) was measured. The teeth were embedded in an alginate model specially developed for testing apex locators. Electronic tooth length measurements (EL) were carried out prior to root canal preparation using the two electronic apex locators (EAL) -Root ZX and Bingo 1020; three measurements were taken and an average computed. After the third measurement, the file was left in the root canal and a periapical radiograph was taken. The radiographic length (RL) was recorded by measuring the file length from the coronal reference point to the tip of the file. Each root canal was then prepared to a no. 40 K-file diameter using a standardized technique; saline was used for irrigation. Upon comple-

Farklı preparasyon genişliklerinde iki elektronik apeks bulucu cihazın doğruluğunun değerlendirilmesi

“…9,16,17 Dentaport ZX, Root ZX mini, Elements Diagnostic Unit&Apex Locator ve Raypex 5 EAB cihazların kök kanal boyunu tespit etmede güvenilirlik-lerinin kıyaslandığı bir çalışmada, Root ZX mini cihazı-nın gerçek çalışma boyutunu başarılı olarak tespit edebildiği bulunmuştur 9 . Bingo 1020 ve Root ZX EAB cihazlarının kullanıldığı bir çalışmada ise kök kanal boyu tespitinde elektronik ölçümler radyografilerden daha gü-venilir bulunmuştur.…”

“…Bingo 1020 ve Root ZX EAB cihazlarının kullanıldığı bir çalışmada ise kök kanal boyu tespitinde elektronik ölçümler radyografilerden daha gü-venilir bulunmuştur. 16 Tek köklü insan dişinde yapılan in vivo çalışmada Propex II cihazının kök kanal boyu tespitinde güvenilirliği araştırılmış ve cihazın etkili olduğu belirtilmiştir. 17 Propex II ve standart radyografik yönte-min kıyaslandığı bir çalışmada, Propex II'nin daha gü-venilir olduğu görülmüş; radyografik yöntemin doğruluğu %76.6 olarak bulunurken Propex II cihazının doğruluğu %86.6 olarak bulunmuştur.…”

Performance in vitro of apex locators in determining root length in primary molars

“…In vitro studies showed high efficacy of EAL in primary teeth, providing better quality in endodontic deciduous treatment 4,[11][12][13] . Thus, the aim of this in vitro study was to compare the performance of two electronic apex locators, Propex II and Root ZX, and digital radiograph in primary molars.…”

Accuracy of Electronic Apex Locator in Enlarged Root Canals with Different Root Canal Irrigants: An in vitro Study

“…Kaufman et al 15 concluded that presence of CHX did not affect the accuracy of electronic apex locators. Fan et al 15 encountered, in dry tubes that the accuracy of Root ZX was 75 to 91.7% within ± 0.5 mm and 100% within ± 1.0 mm, whereas in tubes filled with electrolyte, the accuracy of the Root ZX decreased as tubule diameter increased.…”

“…Fan et al 15 encountered, in dry tubes that the accuracy of Root ZX was 75 to 91.7% within ± 0.5 mm and 100% within ± 1.0 mm, whereas in tubes filled with electrolyte, the accuracy of the Root ZX decreased as tubule diameter increased. However, the results of this study are in accordance with their findings.…”