Relationship between headaches and malocclusion

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OBJECTIVE : Few studies have investigated the relationship between headaches and malocclusion. Here, we examined 689 dental patients who had experienced headaches within the previous year from among 1401 outpatients who had received treatment at the Department of DentistryMethod : Patients were classified 3 malocclusion groups (normal, maxillary protrusion and mandibular protrusion) based on anterior-posterior abnormalities as well as upward and downward abnormalities (normal, deepbite, and openbite). The diagnosis of headache was performed by a neurologist, according to the criteria HIS.RESULT :I.Headaches were seen in 49.2% of the 1401 subjects surveyed. Among these subjects, those with only migraine accounted for 30.2%, those with only tension-type headaches accounted for 27.6%, and those with mixed-type or miscellaneous headaches accounted for 42.2%.II.In terms of the classification of anterior and posterior abnormalities, the incidence rate of headaches among malocclusion types were most numerous in the order of mandibular protrusion, maxillary protrusion, and normal groups. The incidence of migraine was higher than tension-type headaches in normal and mandibular protrusion subjects. The reverse was obserbed in maxillary protrusion subjects.III.In terms of the classification of upward and downward abnormalities, the incidence rate of headaches among malocclusion types were most numerous in the order of operibite, deepbite, and normal groups. The incidence of migraine was higher than tension-type headaches in normal and openbite subjects. The reverse was obserbed in deepbite subjects.CONCLUSION : Although their detailed aetiology is still unknown, the finding of this study suggest that malocclusion may play a role in the onset of migraine and tension-type headaches.