title: Evaluation of treatment outcomes in a 3 years post-graduate orthodontic program using the peer assessment rating (par).
abstract: OBJECTIVE
  To maintain high treatment quality it is important to evaluate orthodontic treatment results using objective methods. Outcome assessments allow private practitioners and university students to evaluate their results and raise the level of treatment outcomes. The aim of this study was to assess the orthodontic treatment outcome in a post-graduate orthodontics program in the University of Valencia (Spain) and to determine whether the treatment outcome is related to several factors as gender, age at start of the treatment, treatment duration, treatment method, extraction-non extraction treatment and cooperation needed.
  
  
  METHODS
  A sample of 50 patients treated in the post-graduate clinic was randomly selected. Pre-treatment and post-treatment study casts have been assessed by the Peer Assessment Rating (PAR index). The influence of various factors: gender, age at start of the treatment, treatment duration, treatment method, extraction-non extraction treatment, cooperation needed and number of students finishing each case, were statistically analyzed.
  
  
  RESULTS
  According to the PAR index, orthodontic treatment reduced the malocclusion in a mean point reduction of 21.4 (CI 95% 18.7-24.1) and a mean percentage reduction of 80.5% (CI 95% 75.9-85.1). The total of the cases improved, 44% of the patients were in greatly improved category.
  
  
  CONCLUSIONS
  None of the variables studied influenced significantly the treatment outcomes regarding the PAR. Based on the general classification criteria of the index, the results showed that the patients received a high standard treatment. Key words:Treatment outcome, orthodontics education, PAR Index.
authors.affiliation: Assistant professor. Stomatology Department, Faculty of Medicine and Dentistry, University of Valencia, Spain.
authors.forename: Paloma
authors.initials: P
authors.lastname: González-Gil-de-Bernabé
authors.affiliation: PhD, Adjunct Professor. Stomatology Department, Faculty of Medicine and Dentistry, University of Valencia, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Bellot-Arcís
authors.affiliation: PhD. Post-Doctoral Assistant Professor, Stomatology Department, Faculty of Medicine and Dentistry, University of Valencia, Spain.
authors.forename: José M
authors.initials: JM
authors.lastname: Montiel-Company
authors.affiliation: PhD. Tenured Lecturer, Stomatology Department, Faculty of Medicine and Dentistry, University of Valencia. Spain.
authors.forename: José L
authors.initials: JL
authors.lastname: Gandía-Franco