title: Class II division 1 malocclusions: the subdivision problem.
abstract: The purpose of this study was to determine the frequency of occurrence of subdivisions, in Class II division 1 malocclusions. Sixty patients seeking orthodontic treatment at the dental college of King Saud University were selected. The results revealed that 45% of Class II division 1 patients examined had subdivisions. The most commonly affected side was the right (66.7%). Mandibular shift upon closure was noted in 36% of the subdivision cases. Mandibular asymmetry was noted in 62.6% of the patients. It can be concluded from this study that subdivisions are a frequent finding in Class II division 1 malocclusions. Appropriate diagnosis of these cases should be done early in the mixed dentition phase, to avoid developing dental or skeletal asymmetries that can persist throughout adulthood.
authors.affiliation: Department of Preventive Dental Sciences, College of Dentistry, King Saud University, Riyadh, Saudia Arabia. ekofide@ksu.edu.sa
authors.forename: E A
authors.initials: EA
authors.lastname: Alkofide
mesh_terms: D000293:Adolescent; D000328:Adult; D003818:Dentition, Mixed; D005146:Facial Asymmetry / Q000473:pathology; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000145:classification* / Q000175:diagnosis / Q000473:pathology / Q000503:physiopathology; D008334:Mandible / Q000473:pathology / Q000503:physiopathology; D008336:Mandibular Diseases / Q000473:pathology; D009068:Movement; D016059:Range of Motion, Articular / Q000502:physiology; D012737:Sex Factors; D013016:Sound; D013704:Temporomandibular Joint / Q000503:physiopathology; D013997:Time Factors