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LARA, A.; NAVARRO, P. & SANDOVAL, P.Incisor size analysis to predict mesiodistal diameter in unerupted canine and premolar crowns in native and non-native Chilean population. Int. J. Morphol., 35(4):1459Morphol., 35(4): -1464Morphol., 35(4): , 2017. SUMMARY:The principal orthodontic problems observed in the mixed dentition phase are related to arch length and tooth size discrepancy. In order to identify such space discrepancies different methods of mixed dentition space analyses have been introduced. For this reason the purpose of this study is to generate a new regressive equation to predict the diameter of cuspid and bicuspid teeth through mesiodistal widths of lower incisors in a Chilean population sample between native and non-native population. The study was conducted at the Araucania Dental Clinic in Temuco, and the sample comprised of historical dental casts from 200 school children (93 boys and 107 girls) from Temuco, Chile, between 13-16 years of age. The native Mapuche population consisted of 107 students and the non-native of 93 students. Measurements of the mesiodistal widths of mandibular incisors, maxillary and mandibular canines and premolars were carried out with the help of Vernier gauge calipers calibrated to 0.01 of a millimeter. The results show that there are differences in the mesiodistal diameter size of incisors, and canines and premolars in the two studied groups. There is a low correlation of the variables studied. In conclusion, significant sexual dimorphism in tooth sizes exists in the native sample, and there is no difference in non-native population. It is necessary to develop a predictive formula that is greater than 70 % of accuracy for clinical application. Resonance imaging (MRI).

2d , Armas Ana del Carmen 1d, e RESUMEN Objetivo: Evaluar la prevalencia de erosión dental entre jugadores de baloncesto que refieren el consumo de bebidas carbonatadas. Materiales y métodos: se plantea un estudio transversal en una población de 60 basquetbolistas entre 8 a 18 años, que realicen actividad física más de 3 veces a la semana y que consuman bebidas energizantes más de 3 veces a la semana, sin síndromes o enfermedad sistémica ni discapacidad física o intelectual. Los participantes, fueron examinados clínicamente por un único examinador en cuanto a sus dientes anteriores superiores a través de índice de erosión dental BEWE y también por un cuestionario sobre conocimiento y consumo de bebidas ácidas. Resultados: se observó una alta prevalencia de erosión dental (56,6%) en la población evaluada, el 41,67% de participantes prefiere consumir bebidas hidratantes luego de la jornada de entrenamiento, con un alto porcentaje de bebidas carbonatadas al día; donde el 71,67% conoce los efectos negativos del consumo de estas bebidas. Conclusión: La presencia de alteraciones en la estructura dental en la población evaluada es alta.Palabras Clave: erosión dental; bebidas carbonatadas; Desgaste dental, desmineralización. (Fuente: DeCS BIREME) ABSTRACT Objective: To assess the prevalence of dental erosion among basketball players who report consumption of carbonated beverages. Materials and methods: a cross-sectional study is proposed in a population of 60 basketball players aged 8 to 18 years, who perform physical activity more than 3 times a week and who consume energy drinks more than 3 times a week, without syndromes or systemic disease neither physical or intellectual disability. The participants were examined clinically by a single examiner regarding their upper anterior teeth through BEWE tooth erosion index and also by a questionnaire on knowledge and consumption of acidic beverages. Results: a high prevalence of dental erosion was observed (56.6%) in the evaluated population; 41.67% of participants preferred to consume hydrating drinks after the training day, with a high percen tage of carbonated beverages per day; where 71.67% know the negative effects of the consumption of these drinks. Conclusion: The presence of alterations in dental structure in the evaluated population is high.