The relationship between masseter muscle pain and T2 values in temporomandibular joint disorders

Publication date: Available online 27 June 2018
Source:Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
Author(s): Yutaka Nikkuni, Hideyoshi Nishiyama, Takahumi Hyayashi
Objective: Myofascial pain in temporomandibular joint disorders (TMD) is evoked by various factors including edematous change. We investigated whether the pain pattern is related to edematous change using a T2 mapping generated by magnetic resonance imaging to detect water content in the tissue.Study designOne hundred and five patients diagnosed with TMD with and without unilateral masseter muscle pain were divided into six groups according to their pain experience: pain on compression (23 cases), pain on movement (13 cases), spontaneous pain (4 cases), pain on compression and movement (14 cases), pain on compression and spontaneous pain (2 cases) and no pain (49 cases). Differences in the mean T2 values of the masseter muscle between the painful and pain-free sides (5 unilateral pain groups) or the right and left side (pain-free group) were compared with paired t-tests. Significant differences were assumed at p < 0.05.ResultsSignificant differences in mean T2 values were found between the painful and pain-free side in the pain on compression group.ConclusionThe findings of edematous change in the masseter muscle of patients with pain on compression may affect treatment planning and lead to investigation of treatment options for myofascial pain in TMD.



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