In vitro evaluation of Root ZX and Raypex 6 in teeth with different apical diameters

Abstract

Background:There is a growing interest about electronic apex locators for working length determination. There are several studies dealing with their performance in different conditions.Aims:The aim of this study is to evaluate the accuracy of Root ZX and Raypex 6 in teeth with different apical diameters.Materials and Methods:Actual working length (AWL) of 80 single rooted teeth were determined as 0.5 mm short of apical foramen. The teeth were divided into 4 groups (n = 20). First group (G 0) included teeth with mature apices. Root canals of the other groups (G 32, G 57 and G 72) were enlarged until apical sizes of 0.32, 0.57 and 0.72 mm were obtained. Samples were embedded in alginate and electronic measurements (EM) were performed.Statistical analysis:was achieved with Fisher exact test.Results:Both devices revealed a high rate of success in G 0 and G 32. Their accuracy decreased significantly in G 57 and G 72 groups (P < 0.05). Intra-group results of Root ZX and Raypex 6 were similar (P > 0.05).Conclusions:Root ZX and Raypex 6 are reliable in teeth with mature apices. At foramen diameters exceeding 0.57 mm, their accuracy is susceptible.

A Comparative Assessment of the Accuracies of Raypex 5, Raypex 6, Ipex and Ipex Ii Electronic Apex Locators: An in Vitro Study

“…They used a microscope at 20x magnification and a computer based measuring system to evaluate the accuracy of Raypex 5. Aydın et al ( 37 ) evaluated the accuracies of Raypex 6 and Root ZX in teeth having different apical diameters. They reported that accuracy of Raypex 6 decreased with increasing apical diameter and athe ccuracy of Raypex 6 was 85% in mature apex.…”

Clinical study on the variability in the distance between apical constriction determined by an apex locator and the radiographic apex

“…The reported accuracy rate is 85%-95%, even with electrolytes. [8][9][10][11][12] The 1996 study by Shabahang et al [13] reports a reliability rate of up to 96.5%.…”

Comparison of the accuracies of multi-frequency electronic apex locators in teeth with enlarged apical foramina: ex vivo

“…Akisue ve ark., 11 Aydın ve ark. 24 ve Herrera ve ark. 10 taşkın preparasyon yapılmış kök kanallarında elektronik apeks bulucuların doğruluklarını değerlendirdikleri çalışmalarında taşkın preparasyon sırasında da el eğelerini kullanmışlardır.…”

“…10,11,24 Yine aynı araştırmacılar apikal foramen çaplarının 0.32 mm, 0.47 mm ve 0.60 mm'den dar olduğu durumlarda elektronik apeks bulucuların doğruluklarının kabul edilebilir olduğunu göstermişlerdir. 10,11,24 Fouad ve ark. 25 yaptıkları çalışmada apikal foramenin kritik çapının 0.3-0.4 mm olduğunu ve daha geniş apikal foramenlerde hatalı ölçümlerin artacağını bildirmişlerdir.…”