Root morphology and development of labial inversely impacted maxillary central incisors in the mixed dentition: a retrospective cone-beam computed tomography study

Sun, Hao, Wang, Yi, Sun, Chaofan, Ye, Qingsong, Dai, Weiwei, Wang, Xiuying, Xu, Qingchao, Pan, Sisi, and Hu, Rongdang (2014) Root morphology and development of labial inversely impacted maxillary central incisors in the mixed dentition: a retrospective cone-beam computed tomography study. American Journal of Orthodontics and Dentofacial Orthopedics, 146 (6). pp. 709-716.

[img] PDF (Published Version) - Published Version
Restricted to Repository staff only

View at Publisher Website: http://dx.doi.org/10.1016/j.ajodo.2014.0...
 
9
5


Abstract

Introduction: The aim of this study was to analyze 3-dimensional data of root morphology and development in labial inversely impacted maxillary central incisors. Methods: Cone-beam computed tomography images from 41 patients with impacted incisors were divided into early and late dental age groups according to their dental age. Sagittal slices in which the labiolingual width of the tooth was the widest in the axial view were evaluated. The inverse angle, the dilaceration angle, and the length of both impacted and homonym teeth were evaluated with SimPlant Pro software (version 13.0; Materialise Dental NV, Leuven, Belgium). Results: The Student t test indicated that the lengths of the impacted teeth were significantly shorter than those of the homonym teeth (P < 0.05), and the root lengths of the early dental age group were significantly shorter than those of the late dental age group. The results from chi-square tests indicated that the incidence of dilacerations was significantly higher in the late dental age group when compared with the early dental age group. Multiple regression analyses indicated that the independent variables for root length of the impacted teeth were dental age (beta 5 0.958; P < 0.001) and length of the nondilacerated part of the root (beta = 0.435; P < 0.001). Conclusions: Dilaceration was more common in the late dental age group. The roots of labial inversely impacted maxillary central incisors continue developing, but their potential is limited.

Item ID: 37054
Item Type: Article (Research - C1)
ISSN: 1097-6752
Funders: Provincial Science and Technology Bureau of Zhejiang (PSTBZ), Municipal Science and Technology Bureau of Wenzhou (MSTBW), James Cook University
Projects and Grants: PSTBZ grant number 2010C33124, MSTBW grant number H20080023
Date Deposited: 07 Jan 2015 08:12
FoR Codes: 11 MEDICAL AND HEALTH SCIENCES > 1105 Dentistry > 110506 Orthodontics and Dentofacial Orthopaedics @ 65%
08 INFORMATION AND COMPUTING SCIENCES > 0801 Artificial Intelligence and Image Processing > 080104 Computer Vision @ 35%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920113 Oro-Dental Disorders @ 100%
Downloads: Total: 5
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page