Güllü Yusuf Ömer, Çakmak Özlü Fethiye
Faculty of Dentistry, Department of Orthodontics, Ondokuz Mayıs University, Atakum, Samsun, 55139, Turkey.
BMC Oral Health. 2024 Dec 24;24(1):1547. doi: 10.1186/s12903-024-05343-x.
This retrospective study aimed to investigate the relationships between the radiographic features of impacted maxillary canines (IMCs) and traction duration and the factors affecting treatment success.
Pre-treatment panoramic radiographs and patient records of 121 consecutive patients with IMCs were analyzed. The measurements included the angle of the IMC with the midline (α-angle), the horizontal position of the IMC relative to the adjacent teeth (S-Sector), the distance from the IMC to the occlusal plane (d-distance), the apex position of the IMC (A), and the vertical height of the IMC relative to the adjacent lateral tooth (V). The measurements were repeated 1 week later. The intraclass correlation coefficient was used to evaluate the relationship between two measurements. Binary logistic regression was performed to determine the factors affecting treatment success. Linear regression was conducted to determine the relationships between traction duration and other parameters. Receiver operating characteristic (ROC) curve analysis was performed to determine the α-angle and the d-distance cutoff values for treatment success. The significance level was set at p < 0.05.
The buccally IMCs were mostly located in sectors 1-2, whereas the palatally IMCs were mostly located in sectors 3-4-5. The effects of the parameters on the treatment success were significant according to the logistic regression of age (p = 0.003), d-distance (p = 0.002), and α-angle (p = 0.001). Linear regression analysis revealed that traction duration was statistically significant (p < 0.001).
According to the results of this retrospective study, the α-angle, d-distance, and sector can be used to predict the buccopalatal position of the IMC. The patient's age, d-distance, and α-angle affected the treatment success. The patient's age, d-distance, and the sector of the impacted canine affected the traction duration.
Not applicable.
本回顾性研究旨在探讨上颌埋伏尖牙（IMCs）的影像学特征与牵引持续时间之间的关系以及影响治疗成功的因素。
分析了121例连续的IMCs患者的治疗前全景X线片和患者记录。测量指标包括IMC与中线的夹角（α角）、IMC相对于相邻牙齿的水平位置（S区）、IMC到咬合平面的距离（d距离）、IMC的根尖位置（A）以及IMC相对于相邻侧切牙的垂直高度（V）。1周后重复测量。组内相关系数用于评估两次测量之间的关系。进行二元逻辑回归以确定影响治疗成功的因素。进行线性回归以确定牵引持续时间与其他参数之间的关系。进行受试者工作特征（ROC）曲线分析以确定治疗成功的α角和d距离临界值。显著性水平设定为p < 0.05。
颊侧IMCs大多位于1-2区，而腭侧IMCs大多位于3-4-5区。根据年龄（p = 0.003）、d距离（p = 0.002）和α角（p = 0.001）的逻辑回归，这些参数对治疗成功的影响具有显著性。线性回归分析显示牵引持续时间具有统计学意义（p < 0.）。
根据本回顾性研究结果，α角、d距离和区域可用于预测IMC的颊腭位置。患者的年龄、d距离和α角影响治疗成功。患者的年龄、d距离和埋伏尖牙的区域影响牵引持续时间。
不适用。
