Comparison of in situ cone beam CT scan data with ex vivo optical scan data in the measurement of root surface area

Oral Surgery, Oral Medicine, Oral Pathol.. - 1w ago Preview

 
 
• AUTO POST
 
• SAVE TO EVERNOTE

Publication date: Available online 16 May 2019

Source: Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology

Author(s): Pengcheng Jia, Gang Yang, Wenjie Hu, Kwok-Hung Chung, Yijiao Zhao, Muqing Liu, Curtis S.K. Chen

Abstract

Objective

To compare root surface area (RSA) measurements of single-root teeth in a sheep mandible based on cone beam computed tomography (CBCT) to measurements made with an optical scanner.

Study Design

Eight anterior teeth of a sheep cadaver mandible were scanned in situ using CBCT with 3 different exposure parameters, followed by treatment with smoothing software. The teeth were then extracted and scanned individually with an optical scanner. Three-dimensional (3-D) digital models of the teeth were reconstructed based on CBCT and optical scanner data. RSA data were calculated and an equivalence test was used to statistically compare the measurements with significance of difference established at α=0.05.

Results

The means of the differences between RSA measurements from CBCT and optical scanning ranged from 0.33% to 3.01%. There were no statistically significant differences between the two methods. The smoothing parameters for good fitness of the linear regression were determined to be 0.8 for the smooth factor, 8 for iterations, and 0 for compensate shrinkage.

Conclusions

The proposed CBCT technique to measure RSA is feasible. RSA data obtained from CBCT in situ are as accurate as optical scanner measurements ex vivo.