Definition
An ankylosed tooth refers to a condition where the root of a tooth becomes permanently fused to the jawbone, lacking the protective periodontal ligament. Consequently, the tooth loses its ability to move and becomes firmly anchored to the jawbone.
Although visually similar to a normal tooth, an ankylosed tooth may appear slightly higher or lower in the gum line. This condition often occurs during tooth development, resulting in a shortened tooth due to interrupted growth.
Cause
The exact cause of periodontal ligament dissolution leading to tooth ankylosis remains medically unclear. However, it's believed that dental trauma, particularly occlusal trauma, may contribute to this condition. Ankylosed teeth typically present no symptoms or pain and are often discovered during routine dental examinations or through diagnostic imaging, such as X-rays. Treatment options for an ankylosed tooth are limited to either leaving it in place or surgical removal.
Solution
Patients with ankylosed teeth can still undergo clear aligner treatment, provided that the affected teeth are not involved in the movement process. Dentists can identify ankylosed teeth by tapping on them with a dental mirror; an ankylosed tooth produces a distinct solid sound compared to the dull, cushioned sound of surrounding teeth. Confirmation can be obtained through X-ray imaging.