| Project/Area Number |
24592894
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Prosthetic dentistry
|
|---|
| Research Institution | Hokkaido University |
|---|
Principal Investigator |
OHATA Noboru 北海道大学, -, 名誉教授 (60002185)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
ARIMA Taro 北海道大学, 大学院歯学研究科, 講師 (80346452)
|
|---|
| Project Period (FY) |
2012-04-01 – 2015-03-31
|
| Project Status |
Completed (Fiscal Year 2014)
|
| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
|
|---|
| Keywords | 顎関節症 / 筋筋膜疼痛 / 咀嚼筋痛 / 頭痛 / ブラキシズム / くいしばり / 筋電計 / 筋・筋膜性疼痛 / 精神的ストレス |
|---|
| Outline of Final Research Achievements |
The aim of this study was to investigate if a low-level but long-lasting tooth-clenching task initiates TMD symptoms. Eighteen healthy participants (24.0±4.3 years) performed and repeated an experimental 2-hour tooth-clenching task at 10% maximal voluntary occlusal bite force at incisors for three consecutive days (Days 1-3). The task evoked pain in the masseter/temporalis muscles and temporomandibular joint after 40.0±18.0 min with a peak intensity of 1.6±0.4 on 0-10 numerical rating scale after 105.0±5.0 minutes (Day 1). On Day 2 and Day 3, pain had disappeared but the tasks, again, evoked pain with similar intensities.The area under the curve of pain NRS in the masseter on Day 2 and Day 3 were smaller than that on Day 1 (P = .006). Prolonged, low-level tooth clenching evoked short-lived pain like TMD. This intervention study proposes that tooth clenching alone is insufficient to initiate longer lasting and self-perpetuating symptoms of TMD.
|
