| Project/Area Number |
25861838
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Multi-year Fund |
|---|
| Research Field |
Prosthodontics/ Dental materials science and
|
|---|
| Research Institution | Niigata University |
|---|
Principal Investigator |
|
|---|
| Project Period (FY) |
2013-04-01 – 2016-03-31
|
| Project Status |
Completed (Fiscal Year 2015)
|
| Budget Amount *help |
¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
|
|---|
| 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 / 筋痛障害 / せん断弾性波伝搬速度 / 咀嚼筋障害 / 筋電図測定 |
|---|
| 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.
|
