Exercise Therapy and Jaw-Mobilizing Device for Trismus in Head and Neck Cancer Patients

Participants in the experimental group will receive a combination of exercise therapy and a jaw-mobilizing device. The intervention includes structured exercise therapy sessions and the use of the jaw-mobilizing device for 12 weeks, beginning one week prior to radiotherapy. Follow-ups will occur at weeks 16, 24, and 36 to assess outcomes.

Participants in the control group will receive exercise therapy only. This intervention involves the same structured exercise therapy sessions as the experimental group for 12 weeks, beginning one week prior to radiotherapy. Follow-ups will occur at weeks 16, 24, and 36 to assess outcomes.