Looseness of teeth is caused by a disease of the periodontium and includes the tissues surrounding the teeth which are the gingiva, the bone supporting the teeth and the fibrous attachment between the bone and teeth.

Causes of Loose Tooth :
When there is accumulation of food debris and bacteria on the tooth, inflammation of gingiva develops due to infection. Inflammation from the gingiva spreads to the fibrous tissue between the teeth and bone and finally it affects the bone. Inflammation and destruction of bone affects the foundation on which the teeth stands causing teeth mobility

Uneven and increased amount of force during chewing can affect the tooth.

A tumor of the bone, which causes destruction to the bony architecture, also results in tooth mobility.

Blunt injury to the tooth structure is another cause of looseness of teeth.