An anterior bite plane is designed to disengage the posterior teeth by keeping them approximately 2 mm apart. This separation reduces occlusal forces on the posterior teeth, allowing muscle relaxation and relief from temporomandibular joint stress. By ensuring only the anterior teeth contact, it prevents posterior interferences and helps in managing conditions like bruxism and muscle hyperactivity. Maintaining this controlled vertical dimension is critical to its therapeutic effectiveness.

Reference: Okeson, Management of Temporomandibular Disorders and Occlusion, 8th Edition.