Affiliation:
1. Department of Orthodontics, Faculty of Odontology, Universidad de los Andes, Chile
2. Private Practice in General Dentistry, Universidad de los Andes, Santiago, Chile
3. Resident, Graduate Orthodontic Program, Department of Orthodontics, Universidad de los Andes, Santiago, Chile
Abstract
ObjectiveThe aim of this study is to describe the evolution of the ANB and SN-GoGn angles throughout development, in a longitudinal sample of Caucasian patients.Materials and MethodsHistorical cephalometric records from North American individuals available at the American Association of Orthodontists Foundation Craniofacial Legacy Growth Collection website were used to carry out an exploratory longitudinal study. Lateral cephalometric radiographs of orthodontically untreated males and females were included. Individuals with three or more longitudinal cephalometric records at pre- and post-pubertal stages, with at least one postpubertal radiograph available in vertebral cervical maturation stage (cervical vertebral maturation) 5 or 6, were selected. Seventy-one individuals met the inclusion criteria. ANB, SNA, SNB, and SN-GoGn angles were measured. Individuals were classified according to the latest postpubertal ANB angle available and grouped by CVM. Descriptive statistics were obtained for the cephalometric variables, and differences between genders were analyzed.ResultsForty-five individuals were classified as skeletal Class I at the end of growth, 17 as Class II, and 9 as Class III. ANB values decrease as growth occurs in every group (average ANB decrease between the stages CVM 1 and 6: Class I - 1.5°, Class II - 0.7°, and Class III - 3.1°). For SN-GoGn angle, a constant reduction was observed as skeletal maturation increased (Average SN-GoGn decrease between the stages CVM 1 and 6: Class I - 4°, Class II - 2.5°, and Class III - 4.9°).ConclusionsANB and SN-GoGn angles decrease during growth. The magnitude varies depending on individual sagittal characteristics, Class III individuals displaying the greatest reduction, and Class II individuals the least.
Reference36 articles.
1. Prevalence of malocclusion and orthodontic treatment need in the United States: Estimates from the NHANES III survey;Proffit;Int J Adult Orthodon Orthognath Surg,1998
2. Malocclusions and perceptions of attractiveness, intelligence, and personality, and behavioral intentions;Olsen;Am J Orthod Dentofacial Orthop,2011
3. Does orthodontic treatment affect patients’ quality of life?;Kiyak;J Dent Educ,2008
4. Esthetics and its relation to orthodontic therapy;Riedel;Angle Orthod,1950
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