{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,17]],"date-time":"2026-05-17T08:05:16Z","timestamp":1779005116342,"version":"3.51.4"},"reference-count":36,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2022,2,23]],"date-time":"2022-02-23T00:00:00Z","timestamp":1645574400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Tomography"],"abstract":"<jats:p>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 &lt; 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.<\/jats:p>","DOI":"10.3390\/tomography8020045","type":"journal-article","created":{"date-parts":[[2022,2,22]],"date-time":"2022-02-22T22:35:00Z","timestamp":1645569300000},"page":"550-559","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Accuracy of a Method to Monitor Root Position Using a 3D Digital Crown\/Root Model during Orthodontic Treatments"],"prefix":"10.3390","volume":"8","author":[{"given":"Kaho","family":"Ogawa","sequence":"first","affiliation":[{"name":"Department of Oral Medicine, Immunity and Infection, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA"},{"name":"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"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8686-3215","authenticated-orcid":false,"given":"Yoshiki","family":"Ishida","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine, Immunity and Infection, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA"},{"name":"Department of Dental Materials Science, School of Life Dentistry at Tokyo, Nippon Dental University, 1-9-20, Fujimi, Chiyoda-ku, Tokyo 102-8159, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yukinori","family":"Kuwajima","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine, Immunity and Infection, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA"},{"name":"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"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cliff","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine, Immunity and Infection, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jacob R.","family":"Emge","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine, Immunity and Infection, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mitsuru","family":"Izumisawa","sequence":"additional","affiliation":[{"name":"Division of Dental Radiology, School of Dentistry, Iwate Medical University, 1-3-27 Chuo-dori, Morioka 020-8505, Iwate, Japan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kazuro","family":"Satoh","sequence":"additional","affiliation":[{"name":"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"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shigemi","family":"Ishikawa-Nagai","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine, Immunity and Infection, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3341-6681","authenticated-orcid":false,"given":"John D.","family":"Da Silva","sequence":"additional","affiliation":[{"name":"Department of Restorative Dentistry and Biomaterials Science, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3829-1256","authenticated-orcid":false,"given":"Chia-Yu","family":"Chen","sequence":"additional","affiliation":[{"name":"Department of Oral Medicine, Immunity and Infection, Harvard School of Dental Medicine, 188 Longwood Avenue, Boston, MA 02115, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,2,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"296","DOI":"10.1016\/S0002-9416(72)90268-0","article-title":"The six keys to normal occlusion","volume":"62","author":"Andrews","year":"1972","journal-title":"Am. 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