Medical considerations in dental treatment of children with Williams syndrome.

Williams syndrome is a rare disorder that was first described in 1961. It is thought to be caused by a microdeletion in the long arm of chromosome 7 at 7q11.23 and is a multisystem, congenital, and panethnic disorder characterized by a number of developmental and physical abnormalities, including congenital cardiovascular abnormalities, mental retardation and neurological features, growth deficiency, genitourinary manifestation, gastrointestinal and musculoskeletal problems, behavioral characteristics, craniofacial features, ophthalmologic features, and dental problems. We describe cases of children with Williams syndrome treated in the department of Pediatric Dentistry of the Hadassah School of Dental Medicine, Jerusalem, Israel. The different treatments rendered to these children are discussed followed by general remarks drawn from those treatments and from a literature review. We conclude that sedation can be helpful in the younger age group to reduce anxiety and uncooperative behavior during minimal dental treatments. Treatment under general anesthesia seems more appropriate for older children and adolescents. Special attention should be given to initial evaluation of these patients, especially because with age aortic stenosis tends to intensify, which together with the progressive renal impairment can escalate blood pressure elevation.