Mental retardation - osteosclerosis refers to a form of intellectual disability that is characterized mainly by below-average mental ability and abnormal hardening of bones, which may actually make them more susceptible to fractures. Thus, individuals with this form of intellectual disability often have problems with tasks involving physical activity and may have broken bones more frequently than others. Like other individuals with intellectual disability, an individual with this condition often has problems with reasoning and solving problems, as well as performing day-to-day tasks. The condition is also often diagnosed during childhood. Doctors diagnose this form of intellectual disability if unusual bone hardening is observed or detected by x-rays. Signs like walking and talking late, slow mastering of basic tasks, and having difficulty remembering things may also suggest this condition in children. Treatment is based on a case-by-case basis and depends on the specific needs of the patient. Bone specialists may suggest patients to undergo surgery or to take supplements to relieve some of the bone hardening. Doctors seek help from various therapists and community services to provide support and care for families affected by intellectual disability.