| Project/Area Number |
14571901
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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 |
Surgical dentistry
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| Research Institution | Kyushu University |
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Principal Investigator |
NAKAYAMA Eiji Kyushu University Hospital, Assistant Prof., 大学病院, 講師 (60172467)
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| Co-Investigator(Kenkyū-buntansha) |
FUJISAKI Wataru Kyushu Sangyo University, Faculty of Engineering, Prof., 工学部, 教授 (60238558)
MORII Koichi Daido Steel, Dept.of Research and Development, Vice-leader, 技術開発研究所, 副主任研究員
YUASA Kenji Fukuoka Dental College, School of Dentistry, Prof., 歯学部, 教授 (40136510)
OHKI Masafumi Kyushu University, Faculty of Medical Science, Prof., 医学部, 教授 (10160441)
TOYOFUKU Fukai Kyushu University, Faculty of Medical Science, Prof., 医学部, 教授 (10117179)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥4,100,000 (Direct Cost: ¥4,100,000)
Fiscal Year 2003: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2002: ¥3,100,000 (Direct Cost: ¥3,100,000)
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| Keywords | shape-memory alloy / non-surgical / endoscoopy / sailolithectomy / basket forceps / superelastic / clinical use / development |
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| Research Abstract |
The purpose of this study was to develop a new non-surgical endoscopic sailolithectomy system suitable for practical use with a shape-memory alloy and to apply it to the clinical use.
We developed a basket forceps with the collaboration of ACTMENT Co. Ltd. (Japan) using nitinol, which is a superelastic shape-memory alloy of nickel and titanium. It has three nitinol wires of 0.16mm diameter memorized an adequate shape to catch the sailolith. However, the outer-diameter of basket forceps is 0.78mm, and the diameter is too large to insert the working channel of the sialendoscopy. Therefore, we should improve the basket forceps to reduce the outer diameter smaller and smaller than the present one in the future.
We also developed two types of fine sialendoscope, which could be introduced to the submandibular duct through the opening of sublingual caruncula. One is a sialendoscope of 1.1-mm outer-diameter (POLYDLAGNOST GmbH, Germany) with 6000-pixels optic fibers, and it has a working channel to insert a basket forceps and an irrigation channel. At the same time, we developed an ultrafine basket forceps specialized in the sialendoscope with less than 0.4mm outer-diameter, which can be inserted into the working channel. The other is a sialendoscope of 1.2-mm outer-diameter (FiberTech Co., Ltd., Japan) with 1600-pixels optic fibers and a working channel of 0.75 inner-diameter, in which a 1.9F basket forceps (Boston Scientific Corporation, USA) can be inserted.
Using these newly developed sialendoscopy systems, we successfully removed sialoliths of the submandibular gland of two patients. However, our systems have the problem ; our systems do not enable to remove the sialolith with the larger diameter rather than the diameter of the salivary duct. We consider that we need to develop a sialendoscopic lithotripsy system to ensure the removal of various size of sailolith.
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