Willems G, Heidbüchel R, Verdonck A, Carels C
Department of Orthodontics, School of Dentistry, Oral Pathology and Maxillofacial Surgery, Faculty of Medicine, Katholieke Universiteit Leuven, Kapucijnenvoer 7, 3000 Leuven, Belgium.
Clin Oral Investig. 2001 Mar;5(1):57-62. doi: 10.1007/s007840000094.
The aim of this retrospective study was to determine the outcome of orthodontic treatment carried out on patients by postgraduate students at the Katholieke Universiteit Leuven, Belgium. The treatment outcome of 292 'final examination' patients and of 287 'control' patients was compared by means of the Peer Assessment Rating (PAR) index. The sample consisted of dental casts representing a wide range of malocclusions at the start of treatment and post-treatment. All patients received non-surgical treatment between 1987 and 1996 by one of 18 different postgraduate students. The data were analysed with a variant of the analysis of covariance. A significantly higher (P < 0.001) treatment standard was found for final examination patients compared to the control, indicated by the mean percentage PAR score reduction of 79.1% and 70.7%, respectively. When the results are expressed in terms of treatment outcome, 44.5% of the examination patients and 44.0% of the controls were allocated to the 'Greatly improved' group, while 3.1% of the patients examined and 7.3% of the control patients were classified as 'Worse or no different'.
这项回顾性研究的目的是确定比利时鲁汶天主教大学的研究生对患者进行正畸治疗的结果。通过同行评估评分（PAR）指数比较了292名“期末考试”患者和287名“对照”患者的治疗结果。样本包括治疗开始时和治疗后的代表广泛错牙合畸形的牙模。所有患者在1987年至1996年间由18名不同的研究生之一进行了非手术治疗。数据采用协方差分析的一种变体进行分析。与对照组相比，期末考试患者的治疗标准显著更高（P < 0.001），分别表现为PAR评分平均降低百分比为79.1%和70.7%。当结果以治疗结果表示时，44.5%的检查患者和44.0%的对照患者被归入“显著改善”组，而3.1%的检查患者和7.3%的对照患者被归类为“更差或无差异”。
