| Project/Area Number |
13671987
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
病態科学系歯学(含放射線系歯学)
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| Research Institution | Asahi University |
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Principal Investigator |
FUJISHITA Masami Asahi University School of Dentistry, Department of Oral Radiology, Professor, 歯学部, 教授 (50028809)
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| Co-Investigator(Kenkyū-buntansha) |
NOJIRI Minori Asahi University School of Dentistry, Department of Oral Radiology, Research Assistant, 歯学部, 助手 (10267825)
ARIJI Yoshiko Asahi University School of Dentistry, Department of Oral and Maxillofacial Radiology, Assistant Professor, 歯学部, 講師 (60232063)
KATSUMATA Akitoshi Asahi University School of Dentistry, Department of Oral Radiology, Associate Professor, 歯学部, 助教授 (30195143)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2002: ¥500,000 (Direct Cost: ¥500,000)
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| Keywords | Temporomandibular joint / Masseter muscle / Doppler ultrasonography / MRI / Blood-flow |
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| Research Abstract |
In the MRI examination of the temporomandibular joint (TMJ), continuous mouth opening about 10 minutes is needed to obtain static images in mouth opening position. The mechanical and psychological stress by the wide and continuous opening of the mouth may cause TMJ symptoms such as muscle pain. To evaluate the blood-flow of the TMJ region in the periods of pre- and post- MRJ examination, color Doppler ultrasonographic examinations were performed. Colored areas indicationg the facial artery and the superficial temporal artery were measured. The thickness of the masseter muscle was also measured. As the results, the blood-flow of the facial artery and the superficial temporal artery were reduced at the post- MRI examination. The mean thickness of the masseter muscle was increased at the post- MRI examination. The findings from MR images of TMJ showed that the maxillaris artery and the transversa faciei artery were stretched by mouth opening. In the continuous mouth opening, the mechanical stretch of the blood vessel may cause the decreasing of blood-flow. The thickness increment of masseter muscle may reveal the oedema which is a provocative factor of the pain
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