Panoramic radiography of the temporomandibular joint. Part 3: Detectability of osseous changes on autopsy mandibular condyles by two different projections in panoramic radiography.

DOI 4 Citations 29 References
  • SUGAWARA Chieko
    Department of Oral and Maxillofacial Radiology, School of Dentistry, The University of Tokushima
  • TAKAHASHI Akira
    Department of Oral and Maxillofacial Radiology, School of Dentistry, The University of Tokushima
  • TAKEUCHI Toru
    Department of Oral and Maxillofacial Radiology, School of Dentistry, The University of Tokushima
  • SHIMOMURA Manabu
    Department of Oral and Maxillofacial Radiology, School of Dentistry, The University of Tokushima
  • HOSOKI Hidehiko
    Department of Oral and Maxillofacial Radiology, School of Dentistry, The University of Tokushima
  • KONAKA Hitomi
    Department of Oral and Maxillofacial Radiology, School of Dentistry, The University of Tokushima
  • UEMURA Shusaburo
    Department of Oral and Maxillofacial Radiology, School of Dentistry, The University of Tokushima
  • SHIBATA Takanori
    Department of Dentistry and Oral surgery, School of medicine, Yamagata University

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Other Title
  • パノラマＸ線撮影装置を利用した顎関節撮影法　第三報　撮影方向の違いによる剖検下顎頭の骨形態異常検出率の比較
  • Part3: Detectability of osseous changes on autopsy mandibular condyles by two different projections in panoramic radiography
  • 第三報 撮影方向の違いによる剖検下顎頭の骨形態異常検出率の比較

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Abstract

The detectability of osseous abnormalities of the mandibular condyle in two different projections using the panoramic x-ray unit was examined. Seventy two autopsy mandibular condyles with macroscopic osseous changes were selected. Corrected sagittal and frontal tomography and panoramic radiography were performed with the condyle in the tomographic layer. Panoramic radiography included two different projections, one at a horizontal angulation of 18° postero-medially from the frontal plane (lateral mode) and another 30° antero-medially (oblique mode). The vertical angulation of the x-ray tube was fixed upward 3° for the lateral and oblique projections. Radiographic concavity, osteophyte, sclerosis and erosion of the condyles were recorded. Sensitivity of the detection of these osseous abnormalities revealed by the two panoramic projections were calculated based on sagittal and frontal tomographic findings as a gold standard. Sensitivity of the detection of each abnormality revealed by lateral panoramic projections/oblique projections/combination of lateral and oblique projections were as follows. Concavity; 0.49/0.22/0.63, osteophyte; 0.69/0.38/0.69, erosion; 0.42/0.71/0.71, sclerosis; 0.46/0.38/0.50, total; 0.73/0.51/0.75. The oblique projection was essential for the detection of erosion, while the lateral projection for osteophyte. When panoramic radiography is employed as a scouting method for temporomandibular joint disease, two different projections are necessary to detect osseous abnormalities sensitively.

Journal

  • Shika Hoshasen

    Shika Hoshasen 37 (2), 127-135, 1997

    Japanese Society for Oral and Maxillofacial Radiology

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