多機能断層装置Scanora^<【○!R】>の顎関節修正側方位断層撮影法における顆頭位の測定精度  [in Japanese] Measurement Accuracy of Condylar Position on Corrected Lateral Tomography of Temporomandibular Joint with Scanora^<【○!R】> Multimodal Radiography  [in Japanese]

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Author(s)

    • 船登 雅彦 FUNATO Masahiko
    • 昭和大学歯学部第一歯科補綴学教室 The First Department of Prosthodontics, Showa University School of Dentistry
    • 新谷 明幸 SHINYA Akiyuki
    • 昭和大学歯学部第一歯科補綴学教室 The First Department of Prosthodontics, Showa University School of Dentistry
    • 古屋 良一 FURUYA Ryoichi
    • 昭和大学歯学部第一歯科補綴学教室 The First Department of Prosthodontics, Showa University School of Dentistry
    • 川和 忠治 KAWAWA Tadaharu
    • 昭和大学歯学部第一歯科補綴学教室 The First Department of Prosthodontics, Showa University School of Dentistry
    • 関 健次 SEKI Kenji
    • 昭和大学歯学部歯科放射線学教室 Department of Oral Radiology, Showa University School of Dentistry
    • 佐野 司 SANO Tsukasa
    • 昭和大学歯学部歯科放射線学教室 Department of Oral Radiology, Showa University School of Dentistry

Abstract

Accurate measurement of the condylar position is important for diagnosis and treatment of temporomandibular joint (TMJ) dysfunction. Radiography has been used for this purpose and recently, Scanora<SUP>®</SUP> multimodal radiography was introduced to Showa University. The projection capacity of the Scanora<SUP>®</SUP> in TMJ is still unclear. The purpose of this study was to estimate the accuracy of the measurement of the condylar position on sagittal tomography with Scanora<SUP>®</SUP> and to compare Scanora<SUP>®</SUP> images with LGM-1 images. Six TMJs obtained from dried skulls were used. Impressions of the joint space were obtained in order to estimate the actual dimensions. The Scanora<SUP>®</SUP> images, LGM-1 images, and impressions were measured with a profile projector. The results were as follows: 1) The measurement error of condylar position on Scanora<SUP>®</SUP> with a mean value of 0.29mm was similar to that on LGM-1 (0.25mm). 2) The measurement errors on both images in 1 of 6 TMJs were especially great (Scanora: 0.72mm, LGM-1: 0.87mm) while the measurement of the other 5 TMJs on both images showed smaller mean errors (Scanora: 0.2mm, LGM-1: 0.12mm). Therefore, there may be a considerable value of errors in the measurement on both images in the case of particular morphological types of joints. 3) It showed that the measurement errors of Y coordinates were larger than those of X coordinates. 4) The projection grade of both images were similar. These results suggested that sagittal tomography on Scanora<SUP>®</SUP> is useful for clinical estimate of the condylar position.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 42(5), 760-767, 1998-10-10

    Japan Prosthodontic Society

References:  29

Cited by:  2

Codes

  • NII Article ID (NAID)
    10008170849
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
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