An unstable lower complete denture is one of the most common problems faced by edentulous patients. Rehabilitation of a patient with severely resorbed mandibular ridge is a challenge to the prosthodontist. The neutral zone is the area in the oral cavity where during function, the forces of the tongue pressing outward are neutralized by the forces of the cheeks and lips pressing inward. The technique of neutral zone is to construct a denture that is shaped by muscle function and is in harmony with the surrounding oral structures. This clinical report describes rehabilitation of a patient with severely resorbed mandibular ridge using neutral zone impression technique.

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Trismus is a condition commonly encountered by the dentists, causing limited mouth opening, interferes with oral hygiene, restricts access for dental procedures, and may adversely affect speech and facial appearance. The overall success of treatment depends on prompt recognition of the cause and initiation of appropriate management. Ideally trismus appliances are used in conjunction with physical therapy effectively for the management of Trismus due to muscle fibrosis or scar tissue that has not yet matured. Currently several trismus appliances either externally activated or internally activated are available commercially. This case report presents a simple and cost-effective approach for the management of Trismus using a Threaded Tapered Screw appliance.

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