| Project/Area Number |
11470414
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Osaka University |
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Principal Investigator |
NAGASHIMA Tadashi Osaka University, Dental Hospital, Assistant Professor, 歯学部・附属病院, 講師 (40237516)
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| Co-Investigator(Kenkyū-buntansha) |
ISHIKAW Kaori Osaka University, Guraduate School of Dentistry, Research Associate, 大学院・歯学研究科, 助手 (90335365)
FURUYA Masako Osaka University, Guraduate School of Dentistry, Research Associate, 大学院・歯学研究科, 助手 (10314387)
NOKUBI Takashi Osaka University, Guraduate School of Dentistry, Professor, 大学院・歯学研究科, 教授 (80028753)
安井 栄 大阪大学, 大学院・歯学研究科, 助手 (40294110)
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| Project Period (FY) |
1999 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥12,000,000 (Direct Cost: ¥12,000,000)
Fiscal Year 2001: ¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2000: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1999: ¥5,800,000 (Direct Cost: ¥5,800,000)
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| Keywords | Bite Plane / Condylar movement / Temporomandibular Disorders / Occlusal contacts / 顎運動 / バイトプレーン療法 / 下顎顎運動 / 下顎運動 |
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| Research Abstract |
The bite plane therapy has been accepted to be useful for treatment of the patients with stomatognathic disorders. There are many studies comparing EMG activity between with and without wearing a bite plane, but few studies comparing jaw and condylar movements between these two conditions. In order to analyze condylar movements during maximal voluntary clenching with and without wearing bite plane, following experiments were performed.
Five dentate subjects who had no signs of muscular and craniomandibular disorders participated in this experiment. A full-arch bite plane with an interincisal distance of 5 mm was fabricated for each subject. 5 types of occlusal contacts were tested in this experiments by grinding the occlusal surface of bite plane. Jaw and condylar movements were recorded with a 6-degree-of-freedom measuring device during with and without bite plane.
During maximal voluntary clenching without wearing the bite plane, the condylar movement was 0.2 〜 0.6 mm. When wearing the bite plane, it was 0.4 〜 1.7 mm with full arch occlusal contact.
The condylar movements during biting the bite plane with full arch occlusal contacts were smaller degree than during biting other types of the bite planes, and it is more nearly comparable to the distance without wearing bite plane.
From these results, we concluded that wearing the full-arch bite plane is useful as a therapy for some cases of occlusal disorders.
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