Development of a New Device for Continuous Measurement of Vertical Dimension using Magneto-Impedance (MI) Sensors

• Fujii Yoshihito

  Division of Removable Prosthodontics, Graduate School of Medical and Dental Sciences, Niigata University

• Kohno Shoji

  Niigata University

• Hayashi Toyohiko

  Department of Biocybernetics, Faculty of Engineering, Niigata University

• Honkura Yoshinobu

  Aichi Steel Corporation

• Kobayashi Hiroshi

  Division of Removable Prosthodontics, Graduate School of Medical and Dental Sciences, Niigata University

Bibliographic Information

Other Title

• 滋気センサを用いた連続記録可能な上下的下顎位測定装置の開発

Abstract

Purpose: The purpose of this study was to develop a new device to measure continuously the vertical dimension of the human jaw relation using magnetic sensors.<BR>Methods: A sensor unit was made of six MI (Magneto-Impedance) sensors (AMI302 4.0×3.5×1.4mm, Aichi Steel Corp.) placed in a line at intervals of 4 mm. The unit was positioned to the head by a glassestype sensor holder. A target magnet (3mm in diameter, 12mm in length) was set in a resin board positioned on the mentum with adhesive tape. 1) In vitro experiments using a precision-movement stage were conducted. 2) One healthy volunteer (age: 25 years) was instructed to perform a jaw opening-closing task with 10 mm range of motion. Before and after the task his jaw position in the intercuspal position was measured forfive minutes. The jaw movements were recorded simultaneously using a 6-degree-offreedom jaw-tracking device.<BR>Results: The mean square error of the in vitro experiment was 0.06 mm under the worst conditions. The mean square error of the positional accuracy was 0.35mm. The reproducibility of the intercuspal position was 0.33mm. These values correspond to about 16% of the value of the shift phenomenon of the resting position (approximately 2.2mm).<BR>Conclusion: Our new device using an MI sensor enables the vertical dimension to be recorded continuously with sufficient accuracy.

Journal

• Nihon Hotetsu Shika Gakkai Zasshi

  Nihon Hotetsu Shika Gakkai Zasshi 51 (4), 741-750, 2007

  Japan Prosthodontic Society

Keywords

• maxillomandibular relationship record
• vertical dimension of occlusion
• physiologic resting position
• magnetic sensor
• measuring device

Details

• CRID: 1390001204411802752
• NII Article ID: 10029762635
• NII Book ID: AN00197911
• DOI: 10.2186/jjps.51.741
• ISSN: 1883177X
• ISSN: 03895386
• PubMed: 17968153
• Web Site: http://www.jstage.jst.go.jp/article/jjps1957/51/4/51_4_741/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2008128351
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • PubMed
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed