Abstract
Objective. To evaluate the in vivo tooth volume through VRMesh and 3Matic programs and to compare the measurements to the physical volume. So, the aim of the study was to ensure the reliability and sensitivity of the three-dimensional software (VRMesh and 3Matic) in measuring tooth volume. Material and Methods. The volume of 26 extracted upper first premolars from orthodontic patients who had CBCT before orthodontic treatment were measured. Two different commercial programs, which were VRMesh and 3Matic, were used to calculate the volume of the segmented upper first premolar from CBCT. The in vivo tooth volume was compared to the physical tooth volume to examine the accuracy of the two software in measuring the tooth volume. Results. The difference between the mean of the in vivo and in vitro tooth volume measurements was too small, making it clinically nonsignificant. ANOVA test was used as a statistical tool, and no statistically significant difference was noticed among the measurements. The values were normally distributed when tested for normality by Kolmogorov-Smirnov and Shapiro-Wilk test. P value less than or equal to 0.05 ( P ≤ 0.05 ) was considered statistically significant. Conclusion. The assessment of the in vivo tooth volume measurement with different three-dimensional imaging software (VRMesh and 3Matic) programs in comparison with the tooth physical volume is reliable. The use of a mouse pen during the refining stage of the segmentation may have increased the accuracy of the procedure. The determined in vivo tooth volumes are dependable and can be applied in orthodontic diagnosis and treatment planning.
Highlights
Evaluation of tooth volume is of great importance in dentistry generally and as specific consideration in orthodontic treatments and biomechanics
CBCT images are used with a small field of view (FOV) [5, 6] which has approximately high contrast image compared with the larger ones [7]
A CBCT image was taken for each patient as a part of their orthodontic treatment plan with a CBCT machine (NewTom VGi scanner; QR s.r.l., Verona, Italy); the exposure was set as 90 kV, 3.00 mA, 9.0 second exposure time, and a voxel size of 0.150 mm
Summary
Evaluation of tooth volume is of great importance in dentistry generally and as specific consideration in orthodontic treatments and biomechanics. CBCT technology has gone through a drastic evolution, due to great demands from each specialty for its accurate, reproducible, and safe three-dimensional images. Three-dimensional imaging raises the possibility of increasing diagnostic ability, with very practical and easy application in daily orthodontic procedures [3, 4]. CBCT images are used with a small field of view (FOV) [5, 6] which has approximately high contrast image compared with the larger ones [7]. FOV refers to the size of the scan volume that is necessary to adequately capture the region of interest [8,9,10]
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