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

Pengcheng Jia; Gang Yang; Wenjie Hu; Kwok-Hung Chung; Yijiao Zhao; Muqing Liu; Curtis Sk Chen

doi:10.1016/j.oooo.2019.05.004

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

Oral Surg Oral Med Oral Pathol Oral Radiol. 2019 Nov;128(5):552-557. doi: 10.1016/j.oooo.2019.05.004. Epub 2019 May 16.

Authors

Pengcheng Jia¹, Gang Yang¹, Wenjie Hu², Kwok-Hung Chung³, Yijiao Zhao⁴, Muqing Liu⁵, Curtis Sk Chen⁶

Affiliations

¹ Department of Periodontology & Second Clinical Division, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China. Pengcheng Jia is now employed in Second Clinical Division, Peking University School and Hospital of Stomatology, Beijing, China.
² Department of Periodontology & Second Clinical Division, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China. Pengcheng Jia is now employed in Second Clinical Division, Peking University School and Hospital of Stomatology, Beijing, China. Electronic address: Huwenjie@pkuss.bjmu.edu.cn.
³ Department of Restorative Dentistry, University of Washington, Seattle, WA, USA.
⁴ Center of Digital Dentistry, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China.
⁵ Department of Oral & Maxillofacial Radiology, Peking University School and Hospital of Stomatology, National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing Key Laboratory of Digital Stomatology, Beijing, China.
⁶ Division of Oral Radiology, Department of Oral Medicine, School of Dentistry, University of Washington, Seattle, WA, USA.

PMID: 31171483
DOI: 10.1016/j.oooo.2019.05.004

Abstract

Objective: The aim of this study was to compare root surface area (RSA) measurements of single-root teeth in a sheep mandible based on cone beam computed tomography (CBCT) with measurements made with an optical scanner.

Study design: Eight anterior teeth of a sheep cadaver mandible were scanned in situ by 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 digital models of the teeth were reconstructed on the basis of 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 2 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.

MeSH terms

Animals
Cone-Beam Computed Tomography*
Imaging, Three-Dimensional
Mandible / diagnostic imaging
Radionuclide Imaging
Sheep
Software
Tooth Root* / diagnostic imaging