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COMPARATIVE STUDY OF TEMPOROMANDIBULAR JOINT RADIOGRAMS USING SOME RADIOGRAPHIC PROJECTIONS

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Abstract

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For the enhancement of a comprehension in temporomandibular joint radiographs, the
author has compared and analysed the roentgenographic images of the
temporomandibular joint of human dry skull which was taken by submentovertex
projection, panoramic radiography, oblique lateral transcranial projection, corrected
anterio-posterior tomogram and corrected lateral tomogram.
The obtained results were as follows.
1. The submentovertex projection represented in detail the both poles and the posterior
surface of the condylar head of the mandible.
2. The oblique lateral transcranial projection represented the articular space, the outer
con-tour of the condylar head and the position of the condylar head within the
mandibular fossa, but the relationship of the temporomandibular joint was not revealed
accurate, because of the oblique direction of a central ray in taking radiographs.
3. The corrected antero-posterior tomogram was superior method in representation of
roent-genographic images of the superior surface and the both poles of the condylar
head and the corrected lateral tomogram was considered as the most accurate method
among some radio-graphic techniques for the interpretation of articular space and
condyle-fossa relationship.
4. It was possible to observe three-dimensionally the head of condyle with the
combinated use of submentovertex projection, corrected antero-posterior tomogram and
corrected lateral tomogram.

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