Taylor P J, Kerr W J, McColl J H
Unit of Orthodontics, Glasgow Dental Hospital and School, U.K.
Br J Orthod. 1996 Nov;23(4):335-41. doi: 10.1179/bjo.23.4.335.
The pretreatment and post-treatment study casts and records of 156 completed fixed appliance and removable appliance cases were analysed, and the influence of various factors on the standard of result, as measured by the change in PAR score produced by treatment and the duration of treatment, was assessed. For the purpose of analysis the sample was divided into two groups; a two-arch fixed appliance group (n = 81) and a removable/mini fixed appliance group (n = 75). Multiple regression procedures were carried out separately for both groups, first, with all gathered data and, secondly, with only information which would be known at the start of treatment. For fixed appliances the initial PAR score was consistently an influential variable on change in PAR score and duration of treatment. Patient compliance, the need to extract a permanent first molar and the presence of an anterior crossbite were also important. The initial PAR score also explained much of the variation in change in PAR for removable/mini fixed appliances, but generally, regression models for this group were less well fitting.
分析了156例完成固定矫治器和活动矫治器治疗的病例的治疗前和治疗后的模型及记录，并评估了各种因素对治疗结果标准的影响，治疗结果标准通过治疗引起的PAR评分变化和治疗持续时间来衡量。为了进行分析，样本被分为两组：双弓固定矫治器组（n = 81）和活动/微型固定矫治器组（n = 75）。对两组分别进行多元回归分析，首先使用所有收集的数据，其次仅使用治疗开始时已知的信息。对于固定矫治器，初始PAR评分始终是影响PAR评分变化和治疗持续时间的一个变量。患者的依从性、拔除第一恒磨牙的必要性以及前牙反牙合的存在也很重要。初始PAR评分也解释了活动/微型固定矫治器PAR变化的大部分差异，但总体而言，该组的回归模型拟合度较差。
