2015 Fiscal Year Final Research Report
Quantitative evaluation of masseter muscle stiffness in patients with temporomandibular disorders by shear wave elastography
| Project/Area Number |
25861838
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Prosthodontics/ Dental materials science and
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| Research Institution | Niigata University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 顎関節症 / 筋筋膜痛 / せん断弾性波 / エラストグラフィ / 超音波診断装置 |
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| Outline of Final Research Achievements |
We aimed to quantify masseter muscle stiffness in patients with masticatory myofascial pain. Masseter muscle stiffness was measured by shear wave elastography, which expresses stiffness as shear wave velocity (Vs). Muscle stiffness was 1.96 m/s (4.18 kPa) in 13 patients in Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD) group Ia, 2.00 m/s (4.34 kPa) in 13 patients in RDC/TMD group Ib and 1.27 m/s (1.75 kPa) in 24 control subjects. Vs was significantly greater in groups Ia and Ib than in control (Steel&Dwass test, p < 0.05). Characteristic pain intensity (CPI) became clear as an independent factor impacting Vs (partial regression coefficient = 0.625; multiple regression analysis, p < 0.05). Masseter muscles stiffness correlated with CPI (Spearman’s rank order test, p < 0.05) and was about two-fold greater in groups Ia and Ib than in healthy subjects.
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| Free Research Field |
顎関節症
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