Home Exercises: All participants will be instructed how to use the Dynasplint® Trismus System (DTS; Dynasplint Systems Inc, Severna Park, Md, USA) at home. Participants' initial introduction to the DTS will include customized fitting (molded patient mouth pieces) and training on donning and doffing of the devices. Verbal and written instructions will be provided throughout the duration of the treatment for safety, general wear and care, and tension setting goals, based on patient tolerance. Participants will start the use of the DTS for 10-30 minutes three times per day, every day. If the exercises are well tolerated, forces will be increased every 2 weeks until maximum tolerance is reached. Participants will use this device for the duration of the manual therapy and exercise protocol ( 6 months).