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Validation of three-dimensional digital model superimpositions based on palatal structures in patients with maximum anterior tooth retraction following premolar extraction

Authors
 Jing Liu  ;  Kyong-Min Koh  ;  Sung-Hwan Choi  ;  Ji-Hoi Kim  ;  Jung-Yul Cha 
Citation
 KOREAN JOURNAL OF ORTHODONTICS, Vol.52(4) : 258-267, 2022-07 
Journal Title
KOREAN JOURNAL OF ORTHODONTICS(대한치과교정학회지)
ISSN
 2234-7518 
Issue Date
2022-07
Keywords
Cephalometrics ; Dental cast analysis ; Digital models ; Palatal ruga
Abstract
Objective: This study aimed to evaluate the superimposition accuracy of digital modes for measuring tooth movement in patients requiring anterior retraction after premolar extraction based on the proposed reference regions.

Methods: Forty patients treated with bilateral maxillary first premolar extraction were divided into two groups: moderate retraction (< 7.0 mm) and maximum retraction (≥ 7.0 mm). Central incisor displacement was measured using cephalometric superimpositions and three-dimensional (3D) digital superimpositions with the 3rd or 4th ruga as the reference point. The Wilcoxon signed-rank test and linear regression analyses were performed to test the significance of the differences and relationships between the two measurement techniques.

Results: In the moderate retraction group, the central incisor anteroposterior displacement values did not differ significantly between 3D digital and cephalometric superimpositions. However, in the maximum-retraction group, significant differences were observed between the anteroposterior displacement evaluated by the 3rd ruga superimposition and cephalometric methods (p < 0.05).

Conclusions: This study demonstrated that 3D digital superimpositions were clinically as reliable as cephalometric superimpositions in assessing tooth movements in patients requiring moderate retraction. However, the reference point should be carefully examined in patients who require maximum retraction.
Files in This Item:
T202203083.pdf Download
DOI
10.4041/kjod21.126
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Orthodontics (교정과학교실) > 1. Journal Papers
Yonsei Authors
Cha, Jung Yul(차정열)
Choi, Sung Hwan(최성환) ORCID logo https://orcid.org/0000-0002-1150-0268
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/189598
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