ROOT RESORPTION DURING LEVELING AND ALIGNING PHASE OF ORTHODONTIC TREATMENT – A RADIOGRAPHIC STUDY
Keywords:Root resorption, Leveling and alignment, Malmgren scoring, Fixed mechanotherapy, radiograph
Aim: This study aims to evaluate the root resorption (RR) during the leveling and aligning phase in patients undergoing fixed orthodontic treatment.
Objective: This study helps in evaluating RR of anterior teeth during leveling and aligning phase of orthodontic treatment.
Methods: This study involves 12 patients undergoing fixed appliance mechanotherapy. The roots of the anterior teeth root were evaluated for RR in each of these patients at 2 time intervals (a) at the start of fixed orthodontic treatment and (b) at the end of leveling and alignment with the help of either two-dimensional digital radiograph or three-dimensional cone-beam computed tomography.
Results: Computerized evaluation of apical RR showed that the mean averaged RR was 0.53 mm (standard deviation [SD] 0.47) for all four incisors; the average for the central incisors was 0.48 mm (SD 0.53).
Conclusions: RR can be detected even in the early leveling stages of orthodontic treatment. About 25% of patients have an average resorption of up to 2 mm of the four maxillary incisors, in the leveling and alignment phase of fixed appliance therapy. Although teeth with long, narrow, and deviated roots are at increased risk of resorption during this early stage, the explained variance of these risk factors is <25%.
Kvam E. Scanning electron microscopy of tissue changes on the pressure surface of human premolars following tooth movement. Scand J Dent Res 1972;80:357-68.
Reitan K. Initial tissue behavior during apical root resorption. Angle Orthod 1974;44:68-82.
Owman-Moll P, Kurol J, Lundgren D. Repair of orthodontically induced root resorption in adolescents. Angle Orthod 1995;65:403-8.
Weltman B, Vig KW, Fields HW, Shanker S, Kaizar EE. Root resorption associated with orthodontic tooth movement: A systematic review. Am J Orthod Dentofacial Orthop 2010;137:462-76.
Smale I, Artun J, Behbehani F, Doppel D, van’t Hof M, Kuijpers-Jagtman AM, et al. Apical root resorption 6 months after initiation of fixed orthodontic appliance therapy. Am J Orthod Dentofacial Orthop 2005;128:57-67.
DeShields RW. A study of root resorption in treated class II, division I malocclusions. Angle Orthod 1969;39:231-45.
Goldson L, Henrikson CO. Root resorption during begg treatment; a longitudinal roentgenologic study. Am J Orthod 1975;68:55-66.
Levander E, Malmgren O. Evaluation of the risk of root resorption during orthodontic treatment: A study of upper incisors. Eur J Orthod 1988;10:30-8.
Malmgren O, Goldson L, Hill C, Orwin A, Petrini L, Lundberg M, et al. Root resorption after orthodontic treatment of traumatized teeth. Am J Orthod 1982;82:487-91.
Reukers E, Sanderink G, Kuijpers-Jagtman AM, van’t Hof M. Assessment of apical root resorption using digital reconstruction. Dentomaxillofac Radiol 1998;27:25-9.
Mirabella AD, Artun J. Risk factors for apical root resorption of maxillary anterior teeth in adult orthodontic patients. Am J Orthod Dentofacial Orthop 1995;108:48-55.
Sameshima GT, Sinclair PM. Predicting and preventing root resorption: Part II. Treatment factors. Am J Orthod Dentofacial Orthop 2001;119:511-5.
Linge BO, Linge L. Apical root resorption in upper anterior teeth. Eur J Orthod 1983;5:173-83.
Kaley J, Phillips C. Factors related to root resorption in edgewise practice. Angle Orthod 1991;61:125-32.
Taithongchai R, Sookkorn K, Killiany DM. Facial and dentoalveolar structure and the prediction of apical root shortening. Am J Orthod Dentofacial Orthop 1996;110:296-302.
Sharpe W, Reed B, Subtelny JD, Polson A. Orthodontic relapse, apical root resorption, and crestal alveolar bone levels. Am J Orthod Dentofacial Orthop 1987;91:252-8.
Brin I, Tulloch JF, Koroluk L, Philips C. External apical root resorption in class II malocclusion: A retrospective review of 1 versus 2-phase treatment. Am J Orthod Dentofacial Orthop 2003;124:151-6.
Kurol J, Owman-Moll P, Lundgren D. Time-related root resorption after application of a controlled continuous orthodontic force. Am J Orthod Dentofacial Orthop 1996;110:303-10.
Sameshima GT, Sinclair PM. Predicting and preventing root resorption: Part I. Diagnostic factors. Am J Orthod Dentofacial Orthop 2001;119:505-10.
Linge L, Linge BO. Patient characteristics and treatment variables associated with apical root resorption during orthodontic treatment. Am J Orthod Dentofacial Orthop 1991;99:35-43.