| Project/Area Number |
63570970
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
小児・社会系歯学
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| Research Institution | Showa University |
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Principal Investigator |
KANEGAE Haruhide Showa Univ. Lecturer., 歯学部, 講師 (90119173)
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| Co-Investigator(Kenkyū-buntansha) |
SAITHO Shigeru Showa Univ. Lecturer., 歯学部, 助手 (20195986)
AIGASE Setsuko Showa Univ. Lecturer., 歯学部, 助手 (40175683)
杉本 明 昭和大学, 歯学部, 助手 (20196744)
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| Project Period (FY) |
1988 – 1989
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| Project Status |
Completed (Fiscal Year 1989)
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| Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1989: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1988: ¥500,000 (Direct Cost: ¥500,000)
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| Keywords | Bone grafting materials / Tooth eruption / New ceramic materials / Hydroxyapatite particles / Tooth movement / 犬 / Tricalcium phsphate顆粒 / (TCP) / 粒径の大きさ / Hydoroxylapataite(HA)顆粒 / 歯牙移動 |
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| Research Abstract |
Several new ceramic materials implanted under periosteum were used and evaluated histologically to select the most valuable material. Then the selected material was implanted into the extraction socket to check the eruption of permanent teeth and tooth movement.
First result demonstrated that the best material for bone grafting is hydroxyapatite particles (HAP), that has 1100ﾟC heated temperature to burn out the binder and the size ranged 500 - 600 u. Then using this HAP. tooth eruption and tooth movement was investigated. Neither delay of tooth eruption nor root resorption was observed. When the orthodontic force was applied. HAP moved into distal site of the grafting area. In addition, the resorption of root surface was observed, and the tooth tipped distally. However, the root resorption was considerably small. It is still unknown whether this resorption affect the orthodontic treatment. Future investigation should be greatly paid attention to this resorption.
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