Rehabilitation training can improve swallow function and slow down the progress of trismus in NPC patients following radiotherapy. The efficacy rate (percentage of patients with excellent or effective results) of rehabilitation group was higher than that of control group (77% vs. 43%), and the difference was statistically significant (p = 0.02). The efficacy rate of trismus in the rehabilitation group was significantly higher than that of the control group (64% vs. 28%, p = 0.02) (22). Using Therabite Jaw Motion Rehabilitation System (Therabite Corporation, Bryn Mawr, PA) for maintaining and/or improving mandibular range of motion in post-irradiated patients had been reported (23). They noted net increase in maximal interincisal distance ( MID) of Therabite group (13.6 mm [+/- 1.6 mm]) was significantly greater than unassisted exercise group (6.0 mm [+/- 1.8 mm]) and mechanically assisted mandibular mobilization with stacked tongue depressors combined with unassisted exercise group (4.4 mm [+/- 2.1 mm]) (P < .05) at week 6 and thereafter. These data supported the benefits of rehabilitation for trismus following RT. However, rehabilitation following new RT techniques have synchronic effect to improve patient's quality of life are another interesting points need to discuss.