. Roentgen interpretation; a manual for students and practitioners . a white line because of overlap-ping of the margins of the break; whenever possible profile viewsof them should be obtained. Fractures of either the inner or the outer table appear as areasof slight irregularity in the density and structure of the limited to the base are frequently overlooked; a verticalprojection of the base in addition to an anteroposterior, postero- 36 FRACTURES AND DISLOCATIONS anterior and both lateral views should be a routine in searching forskull fractures. Cranial aerocele may develop
. Roentgen interpretation; a manual for students and practitioners . a white line because of overlap-ping of the margins of the break; whenever possible profile viewsof them should be obtained. Fractures of either the inner or the outer table appear as areasof slight irregularity in the density and structure of the limited to the base are frequently overlooked; a verticalprojection of the base in addition to an anteroposterior, postero- 36 FRACTURES AND DISLOCATIONS anterior and both lateral views should be a routine in searching forskull fractures. Cranial aerocele may develop following fracture through thesinuses, especially the frontal sinus. They are produced by theincreased air pressure within the nasal cavity when the patientsneezes or blows the nose. At this time air and bacteria may beforced through the _ fracture into the cranial cavity. The pocketcontaining the air will appear on the plate as an area of markedlydiminished density, usually in the frontal region. Plates should betaken from both sides, as it may be absent in Fig. 10.—Fracture of the spine (lateral view). Vertebrae.—Fracture lines are rarely seen in the bodies of verte-brae. What is seen is abnormality in outline or in relations toneighborina; vertebra?. Crushing fractures of the bodies occur most FRACTURES 37 commonly in the thoracic and lumbar regions as the result of severeinjury. They may be overlooked in an anteroposterior view, and alateral view should always be obtained as a check. These fracturesrun a long clinical course and give no evidence of callus formationeven after months or years. Localized hypertrophic spurs orbridges to adjoining bodies often develop after these injuries.
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