Can orthodontic treatment be performed if the tooth roots are short?
Disease description:
I went for a checkup and was told that my tooth roots are slightly short. I just want to ask, is orthodontic treatment really possible for someone like me with this condition? After the treatment, will my teeth become even looser?
Doctor's answer (1)
Dr. Liu Chao
Whether orthodontic treatment is possible for short tooth roots depends on the specific degree of root shortening. If the root is short but the crown-to-root ratio does not exceed 1:1, orthodontic treatment is usually feasible. However, if the root is excessively short, orthodontic treatment is generally not recommended.
The normal crown-to-root ratio is approximately 1:2. When the root is short but the crown-to-root ratio remains below 1:1, it indicates that the root still has a relatively sufficient length to support tooth movement and stability during orthodontic treatment. In such cases, an effective connection can still be maintained between the periodontal ligament and the alveolar bone, and the periodontal tissues retain a certain capacity to withstand the pressure and tension caused by orthodontic forces. A stable periodontal relationship can thus be re-established after orthodontic treatment, allowing the teeth to remain firmly in their new positions.
However, if the root is excessively short—for example, shorter than half the length of a normal root, or even shorter—the contact area between the tooth and the alveolar bone decreases, and the support and cushioning provided by the periodontal ligament become limited. During orthodontic treatment, the risk of tooth loss and mobility significantly increases. In such cases, orthodontic treatment is generally not recommended.
Prior to considering orthodontic treatment, it is important to consult with a qualified orthodontist for a comprehensive evaluation and examination to ensure the safety and effectiveness of the treatment.
