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1994 Fiscal Year Final Research Report Summary

Anatomycal and Radiograhical study of Mandibular head and TMJ articular disc

Research Project

Project/Area Number 04671245
Research Category

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

Allocation TypeSingle-year Grants
Research Field 外科・放射線系歯学
Research InstitutionNihon University

Principal Investigator

SHINODA Koji  Nihon University School of Dentistry, Profseeor, 歯学部, 教授 (80059451)

Co-Investigator(Kenkyū-buntansha) HONDA Kazuya  Nihon University School of Dentistry, Instructor, 歯学部, 助手 (30199567)
HASHIMOTO Koji  Nihon University School of Dentistry, Associate Profseeor, 歯学部, 助教授 (90139197)
SHIMADA Kazuyuki  Shouwa University School of Medicine, Associate Profseeor, 医学部, 助教授 (80130524)
Project Period (FY) 1992 – 1994
KeywordsAnatomy / Radiology / TMJ articular disc / TMJ condyle / internal derangements of the TMJ / TMJ arthrography / disk perforation / osteoarthritis
Research Abstract

The purpose of this research was to investigate the relationship between the TMJ articular disc and condyle by means of radiographical and anatomical approach, and to clarify the clinical details of TMJ arthrosis.
In the financial year 1992 and 1993, arthrography of 30 cadavers' TMJ specimen was performed to observe morphologically three divided parts of TMJ,that is lateral, central and medial parts.
The results were as follows : The type of biplanar disc was observed the most in lateral parts. The type of biconcave discs and enlargement of posterior band discs were observed the most in central and medial parts. The ratio of correspondence between the arthrotomographical and morphological findings were 83.3% in lateral part, 100% in central part and 93.3% in medial part. In several joints there was disagreement between the arthrotomographical and the morphological findings. In these cases, the disks were perforated or thinned.
In the financial year 1994,19 clinically perforated cases and … More 84 non-perforated cases were identified by TMJ arthrotomography and analyzed be radiographical comparison.
The results were as follows : Morphological analysis of the condyle and the articular disc revealed much abnormality in the perforated cases than non-perforated ones. In particular, many kinds of disc deformity were found in ever perforated case. Morphological measurement of mandibular fossa revealed significantly smaller values in the horizontal diameter, vertical diameter and front length in the perforated cases than the non-perforated ones (P<0.05) . Using another word, perforated cases had the tendency showing shallow and narrow mandibular fossa.
These results suggested that the perforation of the TMJ articular disc was the condition of the advanced TMJ arthrosis. The preceding results made some contribution for clarification of the clinical details of TMJ arthrosis, but the mechanism of progress of TMJ arthrosis is still be elucidated.
Therefore, further investigation must be continued. Less

  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 島村,卓也: "顎関節円板のX線学的研究-矢状断における円板形態-" 日大歯学. 68. 609-616 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 本田 和也,川島 祥史,澤田 久仁彦,荒木 正夫,岩井 一男,橋本 光二,篠田 宏司,堀 稔: "顎関節円板の穿孔に関する研究-穿孔例と非穿孔例のX線学的研究-" 日本顎関節学会誌. 6. 79-92 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Takuya SHIMAMURA: "Radiological Study on the Articular Disks of the Temporomandibular Joint-Configurations of the Articular Disks in a Sagittal Arthrotomogram-" Nihon Univ.Dent.J.68. 609-616 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Kazuya HONDA,Shoji KAWASHIMA,Kunihiko SAWADA,Masao ARAKI,Kazuo IWAI,Koji HASHIMOTO,Koji SHINODA,Minoru HORI: "A study of perforation of the TMJ articular disc -A radiographic comparison of perforated cases and non-perforated cases-" J.Jpn.Soc. TMJ6 (2). 79-92 (1994)

    • 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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