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Anatomic and radiographic studies of the temporo-mandibular joint
Radio-abstracts
Anatomic
and
radiographic
Chavez Jaramillo. cember, 1963.
studies
Federation
of the temporo-mandibular
Medica de1 Ecuador
joint. H. Oswaldo 22: No. 89-90, July-De-
Consider a roentgenogram showing an osteolyt,ic process which has destroyed pa.rt of the condyle. In the transcranial lateral x-ray picture only a limited superficial part of the articulation is shown, and one is not able to see the complete picture of the bone destruction. When one obtains an s-ray picture with just one technique, even if it is a universal one, a wrong diagnosis may bc reached because of technical limitations. Experimentally, a lead wire was wrapped around t.he long axis (mcdiolateral) of the condyle of a dissociated mandible, and roentgenograms were made at angulations varying between 18 and 25 degrees. Then the wire was wrapped around the condyle in various positions; the mandible was articulated in the fossae of the skull, and roentgrnograms were made at various angulations. X similar approach was used with the wire outlining the fossa and other ncighboring anatomic structures. Eleven illustrations arc presented. CONCLUSIONS
1. The progressive increase of the angulstion from 18 to 2.5 degrees did not furnish any kind of detail of the condyle; nor did it avoid the superimposition of anatomic elements surrounding the articulation. 2. The true anatomic details of the condyle could not be shown in an s-ray picture The internal third and the extremity of the head of the condyle arc trapped within the limits of the encompassing fossa. 3. The bone ma.ss of the articulation is seen in only one plane in the s-ray film. The limits of the margin of the articulation were shown only by the more prominent parts of the condyle. 4. One does not always find symmetry in the condylcs of the same mandible for reasons of conformation, wear, and the techniques used in obtaining the roentgenogram. In order to keep readers of ORAL SCRGERY, ORAL MEDICINE AND ORAL PATHOLOGY better informed about articles published in journals not generally read by dentally oriented individuals, a “Radio-Abstracts ’ ’ page has been added as a permanent feature of the Oral Roentgenology section. 611
OS..
()..\I. cl 0.1’. .\I:t,v. l!lli.-i
Anatomic
and
radiographic
Chavez Jaramillo. cember, 1963.
studies
Federation
of the temporo-mandibular
Medica de1 Ecuador
joint. H. Oswaldo 22: No. 89-90, July-De-
Consider a roentgenogram showing an osteolyt,ic process which has destroyed pa.rt of the condyle. In the transcranial lateral x-ray picture only a limited superficial part of the articulation is shown, and one is not able to see the complete picture of the bone destruction. When one obtains an s-ray picture with just one technique, even if it is a universal one, a wrong diagnosis may bc reached because of technical limitations. Experimentally, a lead wire was wrapped around t.he long axis (mcdiolateral) of the condyle of a dissociated mandible, and roentgenograms were made at angulations varying between 18 and 25 degrees. Then the wire was wrapped around the condyle in various positions; the mandible was articulated in the fossae of the skull, and roentgrnograms were made at various angulations. X similar approach was used with the wire outlining the fossa and other ncighboring anatomic structures. Eleven illustrations arc presented. CONCLUSIONS
1. The progressive increase of the angulstion from 18 to 2.5 degrees did not furnish any kind of detail of the condyle; nor did it avoid the superimposition of anatomic elements surrounding the articulation. 2. The true anatomic details of the condyle could not be shown in an s-ray picture The internal third and the extremity of the head of the condyle arc trapped within the limits of the encompassing fossa. 3. The bone ma.ss of the articulation is seen in only one plane in the s-ray film. The limits of the margin of the articulation were shown only by the more prominent parts of the condyle. 4. One does not always find symmetry in the condylcs of the same mandible for reasons of conformation, wear, and the techniques used in obtaining the roentgenogram. In order to keep readers of ORAL SCRGERY, ORAL MEDICINE AND ORAL PATHOLOGY better informed about articles published in journals not generally read by dentally oriented individuals, a “Radio-Abstracts ’ ’ page has been added as a permanent feature of the Oral Roentgenology section. 611
OS..
()..\I. cl 0.1’. .\I:t,v. l!lli.-i