Journal of Korean Academy of Oral and Maxillofacial Radiology (치과방사선)

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
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THE STUDY OF THE INTERPRETATION OF THE TMJ RADIOGRAPHY USING SUBTRACTION TECHNIQUE

Subtraction법을 이용한 악관절 X-선사진 판독에 관한 연구

  • Na Choon-Wha (Dept. of Oral Radiology, College of Dentistry, Seoul National University) ;
  • Yoo Dong-Soo (Dept. of Oral Radiology, College of Dentistry, Seoul National University)
  • 라춘화 (서울대학교 치과대학 치과방사선학교실) ;
  • 유동수 (서울대학교 치과대학 치과방사선학교실)
  • Published : 1987.12.01
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Abstract

The purpose of this study is to know the value of the photographic subtraction technic in the transcranial oblique lateral projection of the TMJ. The author examined the transcranial oblique lateral projection radiographs which comprise 50 cases of 32 persons, compared the transcranial oblique lateral projection films and those subtraction films. The following results were obtained. 1) The condyle at closed jaw position had showed a reversed tone image, but the condyle at the opening position had showed a re-reversed ordinary image. Both condyles had showed one subtraction film because radiographic interpretation of TMJ was easy. 2) On 50 cases of subtraction films, 46 cases had showed same radiographic images compared with trascranial oblique lateral projection films. Four cases (3 cases of erosion, 1 cases of sclerosis) had showed additional changes of images so that capability of interpretation was improved.

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