What is the most common cause of blunted roots in teeth?

Blunted roots in teeth are commonly associated with orthodontic forces. This phenomenon occurs when excessive or prolonged forces are applied to the teeth during orthodontic treatment. The roots can begin to resorb or become shorter due to the sustained pressure that affects the periodontal ligament and the surrounding alveolar bone.

While other factors can influence root morphology, such as traumatic injury that may lead to root fractures or alterations in shape, periodontal disease that affects the supporting structures, and pulp necrosis which might lead to inflammatory processes, these conditions typically do not result in the specific presentation of blunted roots as directly attributed to orthodontic forces. The uniqueness of orthodontically-induced blunting lies in the mechanics of tooth movement, making it the most notable cause in this context.