Publicación: Evaluación de factores biológicos y ortodónticos en la reabsorción radicular externa inducida por tratamiento de ortodoncia
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It is important that orthodontists know that external root resorption -RRE- is not only related to orthodontic forces, but also to other internal or biological factors, because their origin is multifactorial. Objective: to evaluate the biological and orthodontic factors on external root resorption induced by orthodontic treatment. Materials and methods: a longitudinal study with a prospective design in 19 patients (11 men and 8 women) with an initial average age of 227.5 years, with complete root formation of the upper and lower incisor teeth and without initial root resorption. The biological and orthodontic factors evaluated were: age, sex, crowding, overjet, overbite, incisor inclination, dental malocclusion, skeletal sagittal classification, degree of RRE, root morphology and treatment technique (conventional and self-ligating). The Levander and Malmgren index was applied at six months of treatment, using periapical radiographs. Results: after 6 months of orthodontic treatment, 56.6% of the teeth did not present RRE and 43.4% presented RRE grade 1, with tooth 31 having the lowest RRE with 26.3%; there was no statistically significant association between biological and orthodontic factors with the RRE. Conclusions: the biological and orthodontic factors studied are not associated with the RRE induced by orthodontic treatment during the first six months of treatment.