Crowded, loose, misaligned or misshaped tooth causes imbalanced chewing and biting. The temporomandibular joint and its muscles try to compensate for this unbalanced movement by shifting jaw position. The muscles also work harder to chew, swallow or bite. All these eventually result in symptoms of TMD like muscle spasms, tension and pain. They may also be caused due to grinding/clenching caused due to TMD/OSA.