2) To determine the effectiveness of a manual therapy protocol plus the use of a dynamic jaw opening device (DTS) on the Gothenburg Trismus Questionnaire (GTQ). Hypothesis: Individuals with trismus receiving a manual therapy protocol plus use of a DTS, for six months, will improve the symptom-specific trismus (i.e. GTQ) after the protocol of treatment. 3) To determine the effectiveness of a manual therapy protocol plus the use of a dynamic jaw opening device (DTS) on pain-disability outcomes in subjects with trismus. Hypothesis: Individuals with trismus receiving a manual therapy protocol plus the use of a DTS, for six months, will significantly improve on pain-disability outcomes (i.e. VAS).