Patients will be blindly allocated to (A) an experimental arm (OMT) and (B) a control arm (SHAM), i.e., manual perceptive technique without correction of any observed osteopathic disorder. In order to minimize the perceived differences, both groups will undergo to osteopathic structural examination, with a similar amount of time being spent on each session. OMT will not be protocol-based but the treating D.O. will compulsory have to include the evaluation (and possible treatment) of TMJD and CD (semi-structured treatment). Specifically, OMT will focus on correcting those osteopathic dysfunctions found during the initial evaluation; both structural (including myofascial release and HVLA), visceral and craniosacral techniques will be administered as appropriate. As regards the sham treatment, the operator will be restricted to the assessment of the cranial rhythmic impulse (CRI) in patients, spending a similar amount of time to that being spent on OMT-treated patients.