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首页> 外文期刊>American Journal of Orthodontics and Dentofacial Orthopedics >Influence of maxillary canine impaction characteristics and factors associated with orthodontic treatment on the duration of active orthodontic traction
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Influence of maxillary canine impaction characteristics and factors associated with orthodontic treatment on the duration of active orthodontic traction

机译：上颌犬的影响与正畸治疗相关性与正畸牵引持续时间相关的影响

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Introduction: Orthodontic traction of a maxillary impacted canine (MIC) increases the orthodontic treatment time. Therefore, the objective of this study was to evaluate the influence of MIC characteristics and factors associated with orthodontic treatment on the duration of active orthodontic traction. Methods: This follow-up and retrospective study included 45 MICs orthodontically tractioned into the occlusal plane with the use of a standardized protocol. MIC characteristics, including type, sector, side, location, height, and complexity of impaction, as well as alpha and beta angles and canine root length and area were measured. Likewise, factors associated with orthodontic treatment, including sex, age, malocclusion, premolar extractions, previous incisor root resorption, ANB, APDI, and SNA angles, and PNS-ANS distance were also evaluated. The statistical analysis included multiple linear regressions to estimate the influence of all variables on the duration of traction (alpha = 0.05). Results: Sex had significant influence (P = 0.027) on the time of traction; in female patients, the time was 2.05 months more than in male patients. Bilateral impaction treatment increased the time by 2.74 months compared with unilateral cases (P = 0.001). Traction of bicortically centered impacted canines increased the duration of traction by 2.85 months (P = 0.001). Finally, the traction time increased in 2.35 months (P = 0.046) when the impaction sectors were 4 or 5 (close to the midline). Conclusions: The duration of active orthodontic traction of MIC is mainly influenced by sex, bilateral type, bicortically centered location, or when MIC is located in sector 4 or 5 close to midline, increasing the traction time by some months.
机译：介绍：上颌撞击犬的正畸牵引力（MIC）增加了正畸治疗时间。因此，本研究的目的是评估MIC特征和与正畸治疗相关的因素对活性正畸牵引持续时间的影响。方法：使用标准化方案，这种后续和回顾性研究包括45麦克风正畸牵引到咬合平面中。测量麦克风特性，包括类型，扇区，侧，位置，高度和复杂性，以及α和β角和犬根根长度和面积。同样，还评价了与正畸治疗相关的因素，包括性别，年龄，咬合，婚前萃取，先前的切牙根部吸收，ANB，APDI和SNA角度以及PNS-ANS距离。统计分析包括多元线性回归，以估计牵引持续时间（alpha = 0.05）的所有变量的影响。结果：在牵引时，性别有重大影响（p = 0.027）;在女性患者中，时间比男性患者在2.05个月内。与单侧案例相比，双侧巨型治疗增加了2.74个月（P = 0.001）。双变居中的牵引犬的牵引力增加了牵引的持续时间2.85个月（p = 0.001）。最后，当拨除扇区为4或5时（靠近中线）时，牵引时间增加了2.35个月（P = 0.046）。结论：MIC的活性正畸牵引的持续时间主要受到性别，双侧类型，双变中心位置的影响，或者MIC位于近在中线的扇区4或5中，将牵引时间增加了几个月。

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