The role of systemic hypermobility and condylar hypermobility in temporomandibular joint dysfunction syndrome.
OBJECTIVE
To evaluate the risk of temporomandibular joint dysfunction (TMD), when both systemic joint hypermobility (SJH) and localized condylar hypermobility (LCH) exist.


METHODS
Sixty-four consecutive outpatients with temporomandibular joint clicking or pain, and 77 sex- and age-matched control subjects, were recruited in the study. LCH was diagnosed when condylar subluxation was present, and SJL was diagnosed by using Beighton's method. The frequency of symptoms, mean mouth opening, and the frequency of subjects with SJL and LCH were the main outcome measures.


RESULTS
Out of the 64 patients, 16 patients were suffering from pain, 20 patients from joint-clicking and 28 patients from both. Both SJH and LCH were more frequently observed in those patients with TMD than in control subjects. The risk of TMD was higher if LCH and SJH existed jointly.


CONCLUSIONS
Both systemic and localized hypermobility may have a role in the etiology of TMD.
Kavuncu
Vural
V
Department of Physical Medicine and Rehabilitation, Medical Faculty, Afyon Kocatepe University, Afyon, Turkey. kavuncu@aku.edu.tr
Sahin
Sezai
S
Kamanli
Ayhan
A
Karan
Ayse
A
Aksoy
Cihan
C
D000328:Adult; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007593:Joint Instability / Q000150:complications*; D008297:Male; D008410:Masticatory Muscles / Q000002:abnormalities; D013705:Temporomandibular Joint Disorders / Q000175:diagnosis / Q000209:etiology*