Resumen

Introduction. Crowding, crooked, irregular and protruding teeth have been a problem in some individuals since ancient times, and attempts to correct this disorder go back at least to 1000 B.C. The importance of facial esthetics and soft tissue relations were described systematically in 1850 by Norman Kingsley’s Oral deformities book. Angle developed orthodontics as a specialty, with himself as “the father of modern orthodontics”. Objective. To compare Mexican and Caucasian male and female adolescent samples by using the Tweed-Merrifield cephalometric analysis. Methodology. The sample consisted in a total of 57 Mexican patients, 35 girls and 22 boys with an average age of 12.54 years. Class I and Class II Angle malocclusions were present and all these patients were treated orthodontically by a specialist (M.G.P.G.). Images of pre-treatment lateral skull radiographs were paired by age (± 6 months), sex and malocclusion. These samples were compared to 49 untreated controls from the Bolton-Brush Growth Study Center, Case Western Reserve University in Cleveland, Ohio. The cephalograms of the two samples were traced, digitized, and analyzed by descriptive cephalometric analysis. Results. Mexican female adolescents showed a more vertical accentuated pattern, with less favorable sagittal relationship between maxilla to mandible, more uprighted lower incisors, and larger anterior and posterior face heights. Resulting in a more vertical proportion in the face (hyperdivergent), mandibular retrusion, and in thicker and protruding upper lips, resulting in convex profiles. Mexican males’ differences were very similar to females, without statistical significance in the upper lip’s thickness and Z angle. Conclusions. Understanding the differences between Mexican and Caucasian populations may be clinically useful when establishing a diagnosis, forecast, treatment planning, monitoring and in the establishment of the objectives for the treatment.

Palabras clave: Tweed-Merrifield analysis cephalometrics Mexican population adolescents.

2021-12-17   |   1,045 visitas   |   Evalua este artículo 0 valoraciones

Vol. 22 Núm.69. Mayo-Agosto 2021 Pags. 1949-1956 Oral 2021; 22(69)