Research Article

Preoperative Estimation of Endodontic Working Length with Cone-Beam Computed Tomography and Standardized Paralleling Technique in comparison to Its Real Length

Table 1

Comparison of mean (standard deviation) values of estimated canal length assessed using two methods depending on the degree of canal curvature.

Total value
Curvature
ModerateSevere(%)

Overestimate paralleling techniqueEstimated length0.27
Difference from real length0.75
Min to max of difference(0.2 to 2.3)(0.3 to 1.2)(0.2 to 2.3)

Overestimate CBCTEstimated length20.3±0.47
Difference from real length0.80±0.91
Min to max of difference(0.1 to 2.0)-0.8(0.1 to 2.0)

Underestimate CBCTEstimated length0.81
Difference from real length0.12
Min to max of difference(-1.0 to -0.1)(-1.2 to -0.2)(-1.2 to -0.1)

Independent -test. Not significant.