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Developing project for a submerged automatic mandibular distractor

Research Project

Project/Area Number 12557174
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Surgical dentistry
Research InstitutionNagoya University

Principal Investigator

SAWAKI Yoshihiro  Nagoya University, University Hospital , Assistant Professor, 医学部・附属病院, 講師 (00215906)

Co-Investigator(Kenkyū-buntansha) SANO Akihito  Nagoya Institute of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (80196295)
FUJIMOTO Hideo  Nagoya Institute of Technology, Faculty of Engineering, Professor, 工学部, 教授 (60024345)
UEDA Minoru  Nagoya University, Graduate School of Medicine, Professor, 大学院・医学研究科, 教授 (00151803)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥5,800,000 (Direct Cost: ¥5,800,000)
Fiscal Year 2001: ¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 2000: ¥3,600,000 (Direct Cost: ¥3,600,000)
KeywordsDistraction osteogenesis / Automatic distractor / Robotics / experimental study / Mandibular hypoplasia / medical device controlled by computer / コンピューター制御医療器
Research Abstract

In this project, a new bone lengthening system was developed for a submerged and an automatic controlled mandibular distraction.
In first term (2000), a automatic distractor was designed, made and tested. An actuator was a small motor with a small gear, and the size of the distractor was 13.75 x 14.1 x 68.75 mm. A control unit was a micro-computer, G8-3048F, Hitachi, Japan. Using a test bed, movement of the distractor was checked and a revision of program was carried out.
In second term (2001), the design of the machine and some components were changed after the animal experiment, and a new version of the device was made for next animal experiment. Many types of distraction speed and rate was performed for a proper speed and rate in mandibular lengthening. Size down and weight down was achieved by smaller flamework and small encorder For electric system, rubber-sealling made the contrail unit to get the perfect cover of the distractor. In new animal experiment using beagle dogs, distraction of mandible was done for 10 mm after 1 week as healing period. Next problems were revealed atter this experiment. An infection to the device and a breakage of miniplate during distraction. Control unit was stable on the animal back with a revised computer program. However, radiographic examination and histological assesment showed a better ossification than hand-driven distraction. In early stage after distraction an angiogenesis was confirmed faster than osteogenesis.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] Hagino H.: "The fate of developing teeth in mandibular lengthening by distraction : An experimental study"Journal of Cranio-Maxillofacial Surgery. 29. 94-99 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 小田知生: "エナメル上皮腫治療後に歯槽骨延長を施行した1例"日本口腔外科学会雑誌. 47・6. 369-372 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hagino H.,et al.: "the fate of developing teeth in mandibular lengtheninf by distraction : an experimental study"Journal of Cranio-Maxillofacial S urgery. 29. 94-99 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Oda T ,et al.: "Alveolar distraction after treatment of ameloblastoma in mandible : A case report"Jpn. J. Oral Maxillofac Surg.. 47. 369-372 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Hagino H.: "The fate of developing teeth in mandibular lengthening by distraction : An experimental study"Journal of Cranio-Maxillofacial Surgery. 29. 94-99 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 小田知生: "エナメル上皮腫治療後に歯槽骨延長を施行した1例"日本口腔外科学会雑誌. 47・6. 369-372 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] YOSHIHIRO SAWAKI: "The fate of developing teeth in mandibular lengthening by distraction"Journal of Cranio Maxillafacial Surgery. (印刷中). (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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