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Evaluation of dental arch width and form changes after orthodontic treatment and retention with a new computerized method.
Am J Orthod Dentofacial Orthop ; 126(4): 464-75; discussion 475-6, 2004 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-15470349
The purpose of this study was to evaluate longitudinal arch width and form changes and to define arch form types with a new computerized method. Maxillary and mandibular models of 21 Class II Division 1 patients were examined before treatment (T(0)), after treatment (T(1)), and an average of 3 years after retention (T(2)). Arch width measurements were made directly on scanned images of maxillary and mandibular models. Arch form changes at T(0)-T(1) and T(1)-T(2) were evaluated by superimposing the computer-generated Bezier arch curves with a computer program. Types of dental arch forms were defined by superimposing them with the pentamorphic arch system, which included 5 different types of arch forms normal, ovoid, tapered, narrow ovoid, and narrow tapered. Maxillary arch widths were increased during orthodontic treatment. Mandibular posterior arch widths were also increased. The expansion of the mandibular arch forms was less than in the maxillary arch forms. Arch width changes were generally stable, except for reduction in maxillary and mandibular interlateral, inter-first premolar, and mandibular intercanine widths. Pretreatment maxillary arch forms were mostly tapered; mandibular arch forms were tapered and narrow tapered. In maxillary arch forms, 76% of the treatment changes were maintained. Mandibular arch form was maintained in 67% of the sample, both during treatment and after retention. In mandibular arches, 71% of orthodontically induced arch form changes were maintained.





Colección: Bases de datos internacionales Base de datos: MEDLINE Asunto principal: Ortodoncia Correctiva / Gráficos por Computador / Evaluación de Resultado en la Atención de Salud / Arco Dental / Maloclusión de Angle Clase II Límite: Adolescente / Niño / Humanos Idioma: Inglés Revista: Am J Orthod Dentofacial Orthop Asunto de la revista: Odontología / Ortodoncia Año: 2004 Tipo del documento: Artículo País de afiliación: Turquía