Electrotherapy and hyperbaric oxygen therapy have been added to physical therapy to treat patients with postsurgery and radiation sequelae. Problems of reduced oral opening and range of head movement, soft tissue necrosis, osteoradionecrosis, and delayed wound healing were addressed in 37 patients over a 3-year period. Of this group, 16 irradiated maxillary resection patients were specifically followed up to determine the effectiveness of the new modalities on improving reduced oral opening. Although healing and the quality of the soft tissues showed marked improvement there was no significant improvement in oral opening.

King, Scheetz, Jacob, Martin, , , , , (1989). Electrotherapy and hyperbaric oxygen: promising treatments for postradiation complications. The Journal of prosthetic dentistry, 1989 Sep;62(3):331-4. https://www.ncbi.nlm.nih.gov/pubmed/2810138