Caries is a progressive destruction of any kind of bone structure, including the skull, the ribs and other bones.

Dental caries is one of many types of caries.

Caries can be caused by osteomyelitis, which is a bacterial disease.

A disease which involves caries is mastoiditis, an inflammation of the mastoid process, in which the bone gets eroded.

Infectious diseases | Bacterial diseases | Skeletal system