MORPHOLOGICAL-CHARACTERISTICS OF DENTITIONS DEVELOPING EXCESSIVE ROOTRESORPTION DURING ORTHODONTIC TREATMENT

The present study focuses on orthodontically provoked, excessive root resorption. The purpose was to identify in these cases common morpholo gical features in radiographic diagnostic material taken before treatm ent. The material was submitted by 35 Danish orthodontists. The goal w as to improve the future orthodontic diagnostics of the dentition in o rder to prevent severe root resorption during treatment. The study ind icates that: (1) there is a strong connection between various dental m orphological characteristics, such as invagination, length of root, an d root shapes, especially taurodontism, and the tendency to root resor ption during orthodontic treatment; (2) there is a connection between anomalies in the dentition, particularly ectopia and agenesis, and the tendency to root resorption during orthodontic treatment; (3) there s eems to be a connection between the pattern of resorption in the prima ry dentition and the tendency to root resorption in the permanent dent ition following orthodontic treatment; (4) girls are more susceptible to root resorption during orthodontic treatment than boys; (5) one oug ht to be on the lookout for connections between condylar changes, root resorptions, and anterior open bites in connection with orthodontic t reatment. The observation regarding root resorption in dentitions in w hich invaginations and taurodontic root shapes occur has not previousl y been reported. Also, the findings of deviant resorption patterns in both the primary and permanent dentitions in a considerable number of patients are new observations, which ought to be incorporated into ort hodontic treatment planning.