Oral self-injurious behavior in the developmentally disabled: review and a case.

Self-injurious behavior occurs in conjunction with a variety of psychiatric disorders as well as various developmental disabilities and some syndromes. The behavioral and biochemical aspects of self-injurious behavior are poorly understood and several etiologies have been suggested. Treatments for self-injurious behavior in developmentally disabled individuals fall into three main categories: pharmacological, behavior modification and physical restraints. The dental management of self-injurious behavior is often difficult. Numerous appliances of various design have been reported in the literature. Osteotomies or extraction of the offending teeth may have to be considered if less invasive methods are unsuccessful. A case is reported where a child engaged in tonic lip biting secondary to a neurological and seizure disorder is treated using a removable lip-protruding device. No impression or lab construction is required. The appliance presents minimal interference with oral hygiene procedures and it can be removed and reinserted as needed. We conclude that a removable lip-bumper may be a viable option in treating transient and acute episodes of self-injurious behavior involving the lower lip and buccal mucosa.