American Board of Orthodontics (ABO) Practice Exam

Individual predisposition is considered a major etiological factor for root resorption (RR) due to the inherent variability in biological responses among different individuals. Some patients may have a genetic predisposition that makes their root structures more susceptible to change when subjected to orthodontic forces or other stresses. This predisposition can include variations in the thickness of dentin, cementum quality, or the biological response of periodontal tissues.

While trauma from orthodontic treatment, genetic alterations, and environmental factors can contribute to root resorption, they often interplay with individual predispositions. The biological response to orthodontic forces can differ significantly from one person to another based on their genetic makeup, making individual predisposition a primary factor to consider in understanding and predicting root resorption outcomes during treatment.