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首页> 外文期刊>American Journal of Orthodontics and Dentofacial Orthopedics >Influence of patient age and sex on orthodontic treatment: evaluations of Begg lightwire, standard edgewise, and straightwire techniques.
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Influence of patient age and sex on orthodontic treatment: evaluations of Begg lightwire, standard edgewise, and straightwire techniques.

机译：患者年龄和性别对正畸治疗的影响：Begg灯丝，标准边缘法和直线法的评估。

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The nature of the planned orthodontic correction--primarily skeletal or dental--ought to be influenced by the age and the sex of the patient. Jaw growth should contribute more in younger adolescents and faster-growing boys, and the correction should be primarily dental in patients with little growth potential. Influences of age and sex were studied in 154 Class II Division 1 young people between 10 and 18 years of age at the start of treatment. Variations among 3 orthodontic techniques, Begg lightwire, standard edgewise, and straightwire, were also examined. The Johnston method of cephalometric analysis was used to partition changes into their skeletal and dental components. Analysis of covariance was used to identify changes because of patient age, patient sex, and treatment technique. Technique differences were localized to 2 areas: (1) less root torquing in the Begg group that left the maxillary incisors more upright than in the other groups and (2) more mesial molar crown tipping in the straightwire group because of using preangulated brackets. The patient's age had the greatest influences on (1) translation and mesial crown tipping of the molars (both changes were larger in younger patients) and (2) mandibular growth, which was greatest in younger patients and declined linearly with age. Forward movement of the maxillary molars was greatest in young patients, but this was exceeded at all ages by mesial translation of the lower molars, thus providing a net improvement in molar relationship. Linear growth was greater in males for all facial dimensions, but the sex difference of consequence was the large forward growth of the mandible that contributed significantly to the sagittal correction in boys but not in girls. One would not expect the effects of age and sex to be large because there is so much individual variation in the malocclusions and tempos of growth. Still, the present study shows that these factors produce readily measurable and systematic influences on the nature of the skeletodental correction.
机译：计划中的正畸矫正的性质（主要是骨骼或牙齿）应受患者年龄和性别的影响。下颚的生长应该对年轻的青少年和成长较快的男孩做出更大的贡献，对于成长潜力小的患者，矫正应该主要是牙科的。在治疗开始时，对年龄在10至18岁之间的154类II级1级年轻人进行了年龄和性别影响研究。还检查了3种正畸技术的变化，即Begg灯线，标准边缘法和直线法。头部测量法的约翰斯顿方法用于将变化分为骨骼和牙齿成分。使用协方差分析来确定由于患者年龄，患者性别和治疗技术而引起的变化。技术差异仅限于两个区域：（1）Begg组的根部扭力少，上颌切牙比其他组更直立;（2）直丝组中的中臼齿牙冠倾斜更多，这是因为使用了预弯支架。患者的年龄对（1）磨牙的平移和近中顶冠的倾斜影响最大（年轻患者的变化均较大）和（2）下颌骨生长的影响最大，年轻患者的下颌生长最大，并且随着年龄的增长呈线性下降。上颌磨牙的向前运动在年轻患者中最大，但在各个年龄段，下颌磨牙的近端平移都超过了上颌磨牙的向前运动，从而在磨牙关系上提供了净改善。男性在所有面部尺寸上的线性增长都较大，但结果的性别差异是下颌骨的大前移，这对男孩的矢状面矫正做出了重要贡献，而对女孩却没有。人们不会期望年龄和性别的影响会很大，因为错牙合畸形和生长速度会有很大的个体差异。尽管如此，目前的研究表明，这些因素对骨骼牙齿矫正的性质容易产生可测量的和系统的影响。

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