Chew M T, Sandham A
Department of Orthodontics, National Dental Centre, Singapore.
Aust Orthod J. 2000 Jul;16(2):98-103.
The aims of this study were to determine the effectiveness and duration of single-phase two-arch fixed appliance treatment and to evaluate factors that may influence these two variables. Data were collected from 177 consecutively completed cases at the Orthodontic Department, Government Dental Clinic, Singapore, during a three-month period. Pre-treatment and post-treatment models were assessed using the Peer Assessment Rating (PAR) index. The result showed that two-arch fixed appliance treatment reduced the malocclusions on average by 77.80 per cent over a period of 25 months. Multiple regression techniques revealed that 22 per cent of the variability in treatment effectiveness could be explained by the pre-treatment PAR score, the age at the start of treatment, the frequency of office visits and whether or not the treatment involved extractions. The variation in treatment duration was due to the frequency of office visits, the pre-treatment PAR score and whether or not the treatment involved extractions or headgear.
本研究的目的是确定单相双牙弓固定矫治器治疗的有效性和持续时间，并评估可能影响这两个变量的因素。在三个月的时间里，从新加坡政府牙科诊所正畸科连续完成的177例病例中收集数据。使用同侪评估等级（PAR）指数评估治疗前和治疗后的模型。结果显示，双牙弓固定矫治器治疗在25个月的时间里平均减少了77.80%的错牙合畸形。多元回归技术显示，治疗有效性的22%的变异性可以通过治疗前的PAR评分、治疗开始时的年龄、复诊频率以及治疗是否涉及拔牙来解释。治疗持续时间的差异归因于复诊频率、治疗前的PAR评分以及治疗是否涉及拔牙或使用头帽。
