title: Presurgical orthodontic decompensation of mandibular incisors.
abstract: The effects of presurgical orthodontic decompensation on lower incisor inclination and angle ANB were studied using a modified Pancherz method of cephalometric analysis. Two groups of patients with mandibular hyperplasia were studied: one group (Group 1) of nineteen cases which required orthodontic decompensation and another (Group 2) of twenty-one cases which did not. The cephalometric changes which occurred in Group 1 were compared with the significant cephalometric differences existing between the two groups with respect to incisor inclination (ILi/OL; P < .001) and the sagittal relation (ANB; P < 0.05). After orthodontic treatment the average lower incisal angulation of the treated group was the same as that in the untreated group; the variations (S.D) being 3.6 degrees and 7.4 degrees respectively indicating that the clinical assessment of the orthodontic treatment effect was quite high.
authors.affiliation: Department of Children's Dentistry and Orthodontics, Faculty of Dentistry, University of Hong Kong, Hong Kong.
authors.forename: B
authors.initials: B
authors.lastname: Xu
authors.forename: Z
authors.initials: Z
authors.lastname: Ju
authors.forename: U
authors.initials: U
authors.lastname: Hägg
authors.forename: H
authors.initials: H
authors.lastname: Tideman
authors.forename: E
authors.initials: E
authors.lastname: Piette
mesh_terms: D000222:Adaptation, Physiological; D000293:Adolescent; D000328:Adult; D002508:Cephalometry; D002648:Child; D005260:Female; D006723:Hong Kong; D006801:Humans; D007180:Incisor; D008297:Male; D008310:Malocclusion / Q000209:etiology / Q000628:therapy*; D008334:Mandible / Q000002:abnormalities; D011378:Prognathism / Q000150:complications / Q000601:surgery; D018709:Statistics, Nonparametric; D014087:Tooth Movement Techniques / Q000379:methods*