title: Long-term evaluation of treated class II division 1 malocclusions utilizing the PAR index.
abstract: The PAR Index was used to evaluate treatment and long-term post-retention results obtained from 50 Class II division 1 malocclusions. Dental casts were used to record the occlusions pre- and post-treatment, as well as 1 and 10 years post-retention. The results suggested a high treatment standard, as indicated by mean percentage PAR score reduction. However, maintenance of post-treatment results 1 and 10 years post-retention was only achieved in 60 and 38 per cent of cases, respectively. The major factor involved in this deterioration appeared to be late lower anterior crowding.
authors.affiliation: Department of Orthodontics, Eastman Dental Hospital, London, UK.
authors.forename: O D
authors.initials: OD
authors.lastname: Otuyemi
authors.forename: S P
authors.initials: SP
authors.lastname: Jones
mesh_terms: D000704:Analysis of Variance; D002508:Cephalometry; D005069:Evaluation Studies as Topic; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor; D008137:Longitudinal Studies; D008310:Malocclusion / Q000209:etiology; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D003765:Models, Dental; D015588:Observer Variation; D009971:Orthodontics, Corrective / Q000592:standards*; D010380:Peer Review; D012008:Recurrence; D015203:Reproducibility of Results; D016896:Treatment Outcome