경두개촬영법에서 조사각도변화에 의한 하악과두의 모양에 관한 실험적 연구 = Impact of the angular changes of rediation projection upon the cindylar shape on transcranial oblique lateral view

다국어 초록 (Multilingual Abstract)

The author has evaluated the transcranial oblique lateral images of the mandibular condyle according to the angulation of the radiation projection. The lead foils were attached to both condylar poles and two thin wires were attached to the superior border and posterior border of the condyle.
The mandibular condyle was located on the device designed specially. The materials consisted of 56 transcranial oblique lateral projections.
The results were as follows:
1. It was possible to find the point of the retroepicondyle at angles of H-1OVO. HOVO, H-1OV5, HOV5, HOV1O and H1OVO - H1OV35(H:horizontal angulation. V:vertical angulation).
2. It was impossible to find the osteosclerotic line located in the anterior portion of the condyle on transcranial oblique lateral view at angles of H2OVO, H2OV5, H3OVO. H3OV5, H3OV1O. The length of the osteosclerotic line was positive horizontal angulation. but the distance between the osteosclerotic line and the superior border of the condyle was getting closer.
3. When the vetical angulation increased. the smooth posteior border line of the condyle was getting angulated with the increase of the positive horizontal angulation and getting curved sharply with the increase of the negative horizontal angulation.
4. We might misinterpret the shape of the medial pole as the ostophyte seen in osteoarthrosis with the increase of the negative horizontal angulation.
5. The inclination and the distance between both condylar poles were getting increased with the increase of the horizontal and the vertical angulation.