Evaluation of the Mandibular Function Impairment Questionnaire in Clinical Diagnosis of Temporomandibular Joint Disorder.

The MFIQ is a short questionnaire that is openly accessible and can be completed relatively quickly by patients in a general dentistry clinic. High ranking of difficulty for items associated with taking a large bite, chewing hard or resistant food and yawning in the presence of complaint of orofacial pain should raise suspicion of TMD and TN as a possible source of the pain.