Comparative Evaluation of Accuracy of Different Apex Locators: Propex IQ, Raypex 6, Root ZX, and Apex ID with CBCT and Periapical Radiograph—In Vitro Study

Table 4

Number of teeth (n) and frequencies of WL measurements (%) that were less, more, or within 0.5 mm from the actual WL. Both groups (<0.5 mm and >0.5 mm) were considered to indicate errors in determining the WL of each tooth. WL measurements obtained using CBCT radiographs and Propex IQ showed no errors, whereas the other WL determination methods showed several errors.

WL determination method	(<0.5 mm) n (%)	(±0.5 mm) n (%)	(>0.5 mm) n (%)
Propex IQ	Nil	35 (100%)	Nil
CBCT radiographs	Nil	35 (100%)	Nil
Raypex 6	1 (2.86%)	25 (71.43%)	9 (25.71%)
Root ZX	Nil	25 (71.43%)	10 (28.57%)
Apex ID	1 (2.86%)	24 (68.57%)	10 (28.57%)
Conventional radiographs	2 (5.71%)	9 (25.71%)	24 (68.57%)