Loose teeth on the right side may be related to periodontitis, apical periodontitis, root resorption, trauma, etc. on the right side. 1. Periodontitis: Periodontitis is a chronic inflammation of the periodontal tissues caused by local factors, inflammation destroys the periodontal tissues, resulting in insufficient force to support the teeth, and the right side of the teeth will be loose. 2. Periapical periodontitis: further development of pulpitis, inflammatory lesions in the periapical tissues of the teeth, can make the affected teeth loose, biting pain. 3. Root resorption: some people have congenital loss of permanent teeth, which leads to stagnation of milk teeth, and the stagnant milk teeth are prone to root resorption, leading to loosening of teeth. In addition, when the teeth are subjected to inappropriate force, it can also cause root resorption, thus causing teeth loosening, such as orthodontic force value is too large. 4. Trauma: When the teeth are hit by external force or fall and damage to the right side of the teeth, it will cause the right side of the teeth to loosen. The right side of the teeth loosening, it is recommended to go to the hospital in time to find out the cause of treatment, to avoid blindly use their own medicine.