Razeghinejad Mohammed Hossein, Bardal Roghieh, Shahi Saeid, Mortezapoor Elham, Mostafavi Maryam
Department of Orthodontics, School of Dentistry, Urmia University of Medical Sciences, Urmia, Iran.
Department of Oral and Maxillofacial Radiology, Dental Caries Prevention Research Center, Qazvin University of Medical Sciences, Qazvin, Iran.
Int J Dent. 2022 Jun 9;2022:2626222. doi: 10.1155/2022/2626222. eCollection 2022.
The purpose of this study was to investigate the relationship of the volume of lateral incisor resorption and impacted canine features.
This study consisted of CBCT images of 47 samples with unilateral impacted maxillary canine (13 males and 34 females). The volume of lateral incisors in impacted side and nonimpacted side was calculated with the Mimics 10.01 software. Canine and lateral incisor angulations were measured in panoramic reformatted images. The canine cusp tip distance from midpalatal suture was measured in axial cross-section images.
The difference between two sides volume was considered as the mean volume of resorption (MVR) that was statistically significant ( < 0.001). MVR was not statistically significant between two sexes (=0.95), in buccopalatal and mesiodistal positions of impacted canine, and in different angulations or distances of the impacted canine to midline ( > 0.05). The concurrent effect of the canine distance to the midline and the angle of the canine with the lateral incisor on the MVR were statistically significant (=0.049).
The maximum rate of lateral root resorption is when the distance from the canine to the midline is less than 5 mm and the angle of the canine to the lateral incisor is 30-60 degrees.
本研究的目的是探讨侧切牙吸收量与埋伏尖牙特征之间的关系。
本研究包括47例单侧上颌埋伏尖牙患者（13例男性，34例女性）的锥形束计算机断层扫描（CBCT）图像。使用Mimics 10.01软件计算埋伏侧和非埋伏侧侧切牙的体积。在全景重建图像上测量尖牙和侧切牙的角度。在轴向横截面图像上测量尖牙牙尖至腭中缝的距离。
两侧体积之差被视为吸收平均体积（MVR），具有统计学意义（<0.001）。MVR在性别之间（=0.95）、埋伏尖牙的颊腭侧和近远中位置以及埋伏尖牙与中线的不同角度或距离之间无统计学意义（>0.05）。尖牙至中线的距离和尖牙与侧切牙的角度对MVR的协同作用具有统计学意义（=0.049）。
当尖牙至中线的距离小于5mm且尖牙与侧切牙的角度为30 - 60度时，侧切牙根吸收速率最大。
