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FRACTURES OF THE DENS [ODONTOID PROCESS]

An Analysis of Thirty-seven Cases



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Abstract

1. Thirty-seven cases of fracture of the dens have been studied.

2. The incidence of non-union was high: 64 per cent after apparently adequate closed treatment.

3. Possible causes of the high incidence of non-union have been studied : attention is drawn to the effect of displacement and to that of posterior displacement in particular.

4. Non-union of the dens with potential instability at the atlanto-axial joint is not acceptable in a patient who expects to lead a normal active life.

5. Atlanto-axial fusion is the method of choice in the treatment of instability ; once that has been secured, pseudarthrosis of the dens is no longer significant.

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