Suitable for patients with mandibular retrognathism, designed to guide the mandible forward. It can be fabricated as removable or fixed type according to clinical requirements.
Other precautions are the same as removable orthodontic appliances.
Model requirement: If precise control of mandibular advancement and bite opening is needed, the dentist should take maxillary and mandibular models, together with wax bite or silicone bite registration for forward guidance.