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1994 Fiscal Year Final Research Report Summary

A study on improvement and application of intra oral jaw tracking device in six-degree of freedom

Research Project

Project/Area Number 04454487
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 補綴理工系歯学
Research InstitutionThe University of Tokushima, School of Dentistry

Principal Investigator

BANDO Eiichi  The University of Tokushima, School of Dntistry, Professor, 歯学部, 教授 (00014168)

Co-Investigator(Kenkyū-buntansha) KORI Motoharu  The University of Tokushima, School of Dentistry, Research Associate, 歯学部, 助手 (50253216)
SUZUKI Atsushi  The University of Tokushima, School of Dentistry, Research Associate, 歯学部, 助手 (80196790)
IKEDA Takashi  The University of Tokushima, School of Dentistry, Research Associate, 歯学部, 助手 (30193204)
FUJIMURA Tetsuya  Tokushima Bunri University, Faculty of Engineering, Assistant Professor, 工学部, 講師 (80219047)
NAKANO Masanori  The University of Tokushima, School of Dentistry, Associate Professor, 歯学部, 助教授 (30136262)
Project Period (FY) 1992 – 1994
KeywordsJaw tracking device / Jaw movement in six-degree of freedom / Mandibular movement
Research Abstract

The Purpose of this research is to develop a new jaw tracking device by using two magnetic fields in quadrature phase. The overall features of this device are as follows. 1) The device measures upper and lower jaws movement independently in six degrees of freedom. 2) That has no mechanical connection between upper and lower jaws and does not prevent any natural jaw function as mastication, 3) The accuracy is 10 micrometer and sampling rate is 300 Hz, 4) The intra oral sensor parts are small enough not to disturb any dental practice usuing in daily dental clinics.
The device involves large primary coils which make magnetic fields and small secondary coils which are attached to upper and lower jaws. Locations of jaw are correspond with out-put signals of secondary coils induced by magnetic fields.
We tested several type devices.
1. Primary coil : 1) Air core coil of 60cm cube
2) Air core coil of 180cm cube
3) Permalloy core coil of 45cmx38cmx18cm rectangular parallelepipes
2. Phase detector : 1) Comparator and 16 bit up-down counter
2) FFT
This study revealed that 18-24 bit A/D converter, 64 bit CPU and 1024-8192 points FFT analysis are required for extremely high resolution jaw movement analysis.
All basic technical problems for developing the new jaw tracking device are resolved by this study.

  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] keisuke Nishigawa: "Effect of altered occlusal guidance on lateral border movement of the mandible" The journal of Prosthctic Dentistry. 68. 965-969 (1992)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 郡 元治: "磁気位相空間を応用し上顎6自由度下顎6自由度運度測定器の試作" 日本補綴歯科学会雑誌. 37. 337-349 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 郡 元治: "磁気位相空間を応用した試作測定器による下顎運動測定" 日本補綴歯科学会雑誌. 37. 377-384 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 上田 龍太郎: "顎口腔機能診断のための6自由度顎運動パラメータの検討" 日本補綴歯科学会雑誌. 37. 761-768 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Hideo Tanaka: "Three dimensional reconstruction of temporomandibular joint osseous components using tomography and analysis of condylar movements with six degrees of freedom" Dentistry in Japan. 30. 74-79 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Motoharu Kori: "Development of six degree of freedom jaw tracking device utilizing two magnetic fields in quadrature phase and measurement of jaw movement" Dentistry in Japan. 31. in press (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 上村 修三郎: "顎関節小辞典(II)" 日本歯科評論社, 253 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 坂東 永一: "アドハンスシリーズ2 顎機能障害 新しい診断システムと治療指針" 医師薬出版株式会社, 332 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Nishigawa, K.: "Effect of altered occlusal guidance on lateral border movement of the mandible" J Prosthet Dent.68 (6). 965-969 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kori, M.: "The development of six degree of freedom bimaxillary jaw tracking device using two magnetic fields in quadrature phase (in Japanese)" J Jpn Prosthodont Soc.37 (2). 337-349 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kori, M.: "The measurement of mandibular movement by experimental jaw tracking device using two magnetic fields in quadrature phase (in Japanese)" J Jpn Prosthodont Soc.37 (3). 652-658 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ueda, R.: "Diagnostic parameters of six degree of freedom jaw movement for the stomatognathic function (in Japanese)" J Jpn Prosthodont Soc.37 (4). 761-768 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tanaka, H.: "Three dimensional reconstruction of temporomandibular joint osseous components using tomography and analysis of condylar movements with six degrees of freedom" Dentistry in Japan. 30. 74-79 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kori, M.: "Development of six degree of freedom jaw tracking device utilizing two magnetic fields in quadrature phase and measurement of jaw movement" Dentistry in Japan. 31 (in press). (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Bando, E.: Advanced dentistry series [2] Gaku-kinou shogai-Atarashii shindan-shisutemu to chiryo-shinshin (Color atlas of temporomandibular disorders-New system of diagnosis and therapy)(in Japanese). Ishiyaku publishiers, INC., 332 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kubo, Y.: Proceedings of the first international congress on maxillofacial prosthetics : Jaw movements in mandibulectomy patients. (in press), (1995)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1996-04-15  

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