Accuracy of linear measurements before and after digitizing periapical and panoramic radiography images

Abstract

The aim of this study was to evaluate the accuracy of linear measurements made on conventional and digitized periapical and panoramic radiographic images of dry human hemi-mandibles. images from the posterior region of 22 dry human hemi-mandibles were obtained by conventional panoramic and periapical radiography technique. Using a digital caliper, 3 vertical measurements were marked directly on the dry hemi-mandibles (reference measurements) as well as on the tracing from the conventional radiographic images of the specimens made onto acetate paper sheet: Distance 1: between the upper limit of the alveolar ridge and the lower limit at the mandible base; Distance 2: between the upper limit of the alveolar ridge and the upper limit of the mandibular canal; Distance 3: between the lower limit of the mandibular canal and the lower limit of the mandible base. next, the radiographs were digitized and the three measurements were made on the digital images using UThSCSa image Tool software. Data were analyzed statistically by one-way ANOVA (α=0.05). There was no statistically significant differences (p>0.05) between periapical and panoramic radiographs or between the measurements recorded using the digital caliper and UThSCSa software compared with dry mandible specimens for Distances 1 (p=0.783), 2 (p=0.986) and 3 (p=0.129). In conclusion, the radiographic techniques evaluated in this study are reliable for vertical bone measurements on selected areas and the UThSCa image Tool software is an appropriate measurement method.

Evaluation of diagnostic accuracy of conventional and digital periapical radiography, panoramic radiography, and cone-beam computed tomography in the assessment of alveolar bone loss

“…However, compared with the control results the panoramic images were close, so indicating the panoramic as an initial test for the evaluation of ABL. In this respect, the authors[1427] agree with results of this research.…”

“…[14] and Langlois Cde et al . [27] who found that periapical radiographs and panoramic images showed similar accuracy, in the present study panoramic radiographs (mean 2.664) were more accurate to detect ABL than periapical using Han-Shin film holder (mean 2.224). However, compared with the control results the panoramic images were close, so indicating the panoramic as an initial test for the evaluation of ABL.…”

Effects of Nonsurgical Periodontal Treatment on the Alveolar Bone Density

“…Longlois et al (24) showed that although the use of software allows manipulating images, storing them in compact discs, measuring both linear and angular distances and determining gray levels at a specific point, there is no difference among the measurements obtained with conventional radiographs, digitized radiographs and dry specimens.…”

Influence of crown‐to‐implant ratio and different prosthetic designs on the clinical conditions of short implants in posterior regions: A 4‐year retrospective clinical and radiographic study

“…To ensure standardization and avoid possible radiographic distortion of the panoramic radiographs, internal calibration was performed with the known distance of the thread pitch (1.00 mm). This would make the measurement fairly precise and accurate for clinical use, which has been validated by Persson et al, 33 Langlois Cde et al, 34 and Schulze et al 35 The amount of MBL was a little higher than that of short implants reported by Lai et al 36 and Rossi et al 37 The discrepancy might be explained due to the different baselines used in the different studies, some of which used the loading time, while the present study defined the insertion time as the baseline. Some studies showed that increased C/I ratios might be a risk factor for peri-implant crestal bone loss.…”