ONE OR TWO SCREWS IN THE FRACTURE OF THE ODONTOID PROCESS? EVALUATION USING COMPUTED TOMOGRAPHY
Objective:To evaluate the bone area of the odontoid process through computed tomography and its relation with the area of one and two screws in the male and female subjects.Methods:188 CT scans of adults were analyzed. The isthmus area was selected and the transverse diameter was measured at 1.2 mm from the base of odontoid.Results:After placement of a screw, the odontoid area remains with 82% of free bone for both men and women. With two screws, 45.6% of women, had a free bone area of the odontoid process between 50% and 75% and 54.4% were above 75%. 26.6% men had percentage from 50% to 75% of free bone area and 73.4% above 75% (p=0.07). After the placement of two screws, the bone area was, in average, 77.3% in men and 75.4% in women. Using the Student t-test, the differences between the average of percentage of free bone area in men and women are significantly lower in women (p=0.0012).Conclusion:The pre-operative planning through CT can help to choose the number of screws in the odontoid process. The choice should be particularly careful when using two screws in women.
Main Authors: | Amaral,Carlos Alexandre Botelho do, Nakagawa,Edgar Taira, Ferreira,Leonardo Ternis, Franco,José Sergio, Pires,Robinson Esteves Santos, Cavallari,Flávio, Labronici,Pedro José |
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Format: | Digital revista |
Language: | English |
Published: |
Sociedade Brasileira de Coluna
2015
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Online Access: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1808-18512015000300210 |
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