| Project/Area Number |
03670938
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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 |
外科・放射線系歯学
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| Research Institution | The Department of Oral and Maxillofacial Surgery 2, Faculty of Dentistry. Tokyo Medical and Dental University. |
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Principal Investigator |
SUGIYAMA Yoshiki Tokyo Medical and Dental University Dentistry, Assistant, 歯学部・文部教室助手 (00162909)
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| Co-Investigator(Kenkyū-buntansha) |
ISHII Masatoshi Tokyo Medical and Dental University, Dentistry, Assistant, 歯学部附属病院, 助手 (70212826)
ONO Toaki Tokyo Medical and Dental University, Dentistry, Lecturer, 歯学部, 文部教室講師 (80014207)
岩佐 俊明 東京医科歯科大学, 歯学部附属病院, 助手 (10107302)
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| Project Period (FY) |
1991 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1992: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1991: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Superelastic Ni-Ti alloy / Shape memory alloy / Maxillary prosthesis / Cleft lip and palate / Maxillo-facial defect / 顎補綴 |
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| Research Abstract |
Many patients who have maxillary defect use prosthesis. However the retention of usual prosthesis is so weak that sometimes it is hard to wear it.
In 1991 and 1992, we investigated a new type retainer of maxillary prosthesis. The retainer consists of superelastic Ni-Ti wire and soft resin. We arranged Ni-Ti wire (0.2 x 0.2mm, Tomy Co.) as the core of the retainer, and wrapped this wire in soft resin (Morosil, Dental Echo Co.). The cross section of the retainer had the letter Y shape. One of the characteristics of superelastic Ni-Ti alloy is shape memory. The new retainer was deformed easily in ice water, and restored in room temperature.
For clinical application of this retainer in oral surgery, we made data bank of patients with cleft lip and palate. And we follow up these patients by this data bank.
As a short term result, it was difficult to control its retentive force.
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