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Article

Accuracy of a Method to Monitor Root Position Using a 3D Digital Crown/Root Model during Orthodontic Treatments

by
Kaho Ogawa
1,2,
Yoshiki Ishida
1,3,
Yukinori Kuwajima
1,2,
Cliff Lee
1,
Jacob R. Emge
1,
Mitsuru Izumisawa
4,
Kazuro Satoh
2,
Shigemi Ishikawa-Nagai
1,
John D. Da Silva
5 and
Chia-Yu Chen
1,*
1
Department of Oral Medicine, Immunity and Infection, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA
2
Division of Orthodontics, Department of Developmental Oral Health Science, School of Dentistry Iwate Medical University, 1-3-27 Chuo-dori, Morioka 020-8505, Iwate, Japan
3
Department of Dental Materials Science, School of Life Dentistry at Tokyo, Nippon Dental University, 1-9-20, Fujimi, Chiyoda-ku, Tokyo 102-8159, Japan
4
Division of Dental Radiology, School of Dentistry, Iwate Medical University, 1-3-27 Chuo-dori, Morioka 020-8505, Iwate, Japan
5
Department of Restorative Dentistry and Biomaterials Science, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA
*
Author to whom correspondence should be addressed.
Tomography 2022, 8(2), 550-559; https://doi.org/10.3390/tomography8020045
Submission received: 12 January 2022 / Revised: 15 February 2022 / Accepted: 17 February 2022 / Published: 23 February 2022
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Abstract

This study aimed to assess the accuracy of a method of predicting post-movement root position during orthodontic treatment using a 3D digital crown/root model (3DCRM) created with pre-movement records of both cone-beam computed tomography (CBCT) and dental arch digital scans. Pre- and post-movement CBCT scans and dental arch digital scans of five patients who had completed orthodontic treatments were used in this study. The 3DCRM was superimposed onto the post-movement scanned dental arch to identify the post-movement root position (test method). Post-movement CBCT (referenced as the current method) served as the control to identify the actual post-movement root position. 3D-coordinate analysis revealed no significant differences between the test and current methods along the X and Y axes. However, the discrepancy on the Z axis (especially in cases of intrusion) was greater than that in all other directions for all three tooth types examined (p < 0.05). A strong positive correlation between the degree of discrepancy and the distance of tooth movement was observed on the Z axis (r = 0.71). The 3DCRM method showed promising potential to accurately predict root position during orthodontic treatments without the need for a second CBCT. However, root resorption, which affected the Z axis prediction, needs to be closely monitored using periapical radiographs to complement this method.
Keywords: digital dentistry; CBCT; digital scans; orthodontic tooth movement digital dentistry; CBCT; digital scans; orthodontic tooth movement

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MDPI and ACS Style

Ogawa, K.; Ishida, Y.; Kuwajima, Y.; Lee, C.; Emge, J.R.; Izumisawa, M.; Satoh, K.; Ishikawa-Nagai, S.; Da Silva, J.D.; Chen, C.-Y. Accuracy of a Method to Monitor Root Position Using a 3D Digital Crown/Root Model during Orthodontic Treatments. Tomography 2022, 8, 550-559. https://doi.org/10.3390/tomography8020045

AMA Style

Ogawa K, Ishida Y, Kuwajima Y, Lee C, Emge JR, Izumisawa M, Satoh K, Ishikawa-Nagai S, Da Silva JD, Chen C-Y. Accuracy of a Method to Monitor Root Position Using a 3D Digital Crown/Root Model during Orthodontic Treatments. Tomography. 2022; 8(2):550-559. https://doi.org/10.3390/tomography8020045

Chicago/Turabian Style

Ogawa, Kaho, Yoshiki Ishida, Yukinori Kuwajima, Cliff Lee, Jacob R. Emge, Mitsuru Izumisawa, Kazuro Satoh, Shigemi Ishikawa-Nagai, John D. Da Silva, and Chia-Yu Chen. 2022. "Accuracy of a Method to Monitor Root Position Using a 3D Digital Crown/Root Model during Orthodontic Treatments" Tomography 8, no. 2: 550-559. https://doi.org/10.3390/tomography8020045

APA Style

Ogawa, K., Ishida, Y., Kuwajima, Y., Lee, C., Emge, J. R., Izumisawa, M., Satoh, K., Ishikawa-Nagai, S., Da Silva, J. D., & Chen, C.-Y. (2022). Accuracy of a Method to Monitor Root Position Using a 3D Digital Crown/Root Model during Orthodontic Treatments. Tomography, 8(2), 550-559. https://doi.org/10.3390/tomography8020045

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