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2003 Fiscal Year Final Research Report Summary

Change in horizontal mandibular position after gothic arch tracing in edentulous patients

Research Project

Project/Area Number 14571867
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 補綴理工系歯学
Research InstitutionThe Nippon Dental University

Principal Investigator

ARAKAWA Ichiro  The Nippon Dental University, School of Dentistry at Tokyo, Assistant Professor, 歯学部, 講師 (00277592)

Co-Investigator(Kenkyū-buntansha) KOBAYASHI Yoshinori  The Nippon Dental University, School of Dentistry at Tokyo, Professor, 歯学部, 教授 (20095102)
SHIGA Hiroshi  The Nippon Dental University, School of Dentistry at Tokyo, Associate Professor, 歯学部, 助教授 (50226114)
Project Period (FY) 2002 – 2003
Keywordsgothic arch tracing / tapping movement / maxillomandibular relation record / 6-degrees of freedom tracking / TMJ tomography / condylar position
Research Abstract

The purpose of this experiment was to investigate whether the practice of tracing gothic arch influence the condylar position in edentulous patient. Results were the following.
Three healthy males in the twenties were selected. The anterior and bilateral border movement and the tapping movement of the mandible were recorded by mean of the K3DMS2 system with 6-degrees of freedom, and a program that can analyzed quantitatively the gothic arch and the tapping point was developed. The program was able to display the mandibular movement during gothic arch tracing, and at the same time the length of the anteriorly and bilaterally traced path, the border angle, the overlapping of tapping point over the gothic arch traced path, the average point of the ten tapping points, its positional coordinates, standard deviation, and coefficient of variation.
For the six edentulous patients the anterior and bilateral border movement and the tapping movement of the mandible were recorded, and the bite was recorded at the apex of gothic arch (record A). Then the subjects were asked to trace gothic arch repeatedly till making clearly apex, and the bite was recorded (record B). The condylar positions for the record A and the record B were recorded using a tomography. The length of anterior and bilateral border movement for the record B was significantly longer than that for the record A. The maximal diameter of tapping points for the record B was significantly smaller than that for the record A. The condylar displacement index for the record B was significantly smaller than that for the record A.
From these results it was suggested that the practice of tracing gothic arch brought about expansion of mandibular movement, stability of tapping movement, and improvement of condylar position in edentulous patient.

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] Ichiro Arakawa et al.: "Development of Analyzing System for Gothic arch and Tapping point"2002 Annual Fall Scientific Meeting of the Korean Academy of Prosthodontics, Program and Abstracts of Papers. 148 (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 荒川一郎 他: "無歯顎者におけるゴシックアーチ描記による水平的下顎位の変化"日本顎関節学会雑誌. (発表予定).

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Ichiro Arakawa, Hiroshi Shiga, Yoshinori Kobayashi, Masaoki Yokoyama: "Development of Analyzing System for Gothic arch and Tapping point"2002 Annual Fall Scientific Meeting of the Korean Academy of Prosthodontics, Program and Abstracts of Papers. 148. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Ichiro Arakawa, Hiroshi Shiga, Yoshinori Kobayashi: "Change of horizontal mandibular positions after gothic arch tracing in edentulous patients"J. Jpn Soc T.M.J.. (pre-establish).

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

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Published: 2005-04-19  

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