Factors Associated to Apical Root Resorption after Orthodontic Treatment

Abstract

Objective:The aim of this study was to assess the possible factors associated to root resorption, common to daily clinical orthodontics, especially parafunctional habits.Methods:A retrospective study of 600 patients (308 females and 292 males) previously treated orthodontically was conducted. The sample was divided into two groups related to the degree of root resorption at the ending of treatment according to Malmgren. Group 1 comprised 507 patients with a mean initial age of 14.21 years and who had absent or mild final external root resorption, characterized by grades 0, 1 and 2 of root resorption; Group 2 comprised 93 patients with initial mean age of 14.57 years and who had moderate or severe root resorption, characterized by grade 3 and 4. The groups were then compared in terms of age at the beginning and ending of the treatment, treatment time, gender, type of treatment (with and without extractions), parafunctional habits (bruxism, onychophagia, the habit of biting objects, tongue thrusting habit and thumb sucking habit), allergies and pretreatment root resorption.Results:The results show that the initial age, gender, type of malocclusion, parafunctional habits and allergies do not represent a statistically significant risk of root resorption.Conclusion:Treatment time and type (with and without extractions) and the presence of external root resorption at the beginning of the treatment showed significant differences.

Factores De Riesgo Biológicos Y Relacionados Con El Tratamiento De Ortodoncia Asociados a Reabsorción Radicular Externa: Estudio De Casos Y Controles

“…While several authors link EARR to other variables such as allergies, 19 apical root morphology, 2,19 initial overjet, 3,6,19 skeletal classification, extractions treatment, 2,3,6,7,[19][20][21] orthodontic technique used, 20 and duration of treatment, 3,6,7,14,18,19,22 the present study could not establish a significant relationship between these variables and EARR as well as other authors, 2,3,7,14,19,20,[22][23][24] with results similar to that of our study. Currell et al 25 conducted a systematic literature review (SLR) in search for evidence to support the association between orthodontic movement and EARR.…”

Reabsorción radicular externa asociada al tratamiento ortodóncico: revisión de la literatura

“…Sondeijker y colaboradores exponen que la evidencia indica como baja o muy baja para todos los factores de riesgo relacionados con el paciente a excepción de la edad y el género que indica que no tiene relación con RRE 16 . Pastro y colaboradores concuerdan con que no existe relación entre el género y edad y la reabsorción radicular, pero sí habría relación en el caso de que un paciente adulto presentara periodontitis crónica 20 .…”

“…De acuerdo a la maloclusión, Fang y colaboradores en su estudio comprobaron que sí es un factor de riesgo para la reabsorción radicular 25 , ya que está relacionada por la mayor cantidad de movimiento dental necesario en el tratamiento ortodóncico 3,20 . En cuanto al tipo de maloclusión, algunos autores indican que un exceso vertical y las mordidas abiertas tienden a presentar mayores índices de RRE 1 , otros indican que las mordidas abiertas y un overjet aumentado son más propensos 9 , Maués y colaboradores obtuvieron como resultado que un overjet superior a 5 mm es un factor de riesgo para RRE severa.…”

Orthodontically induced root resorption: An updated review

“…An association between gender and root resorption has not been confirmed yet 44 . Males and females have equal chances to develop root resorption.…”