Tomographic correlation for Magerl's technique in C1-C2 arthrodesis in children.
OBJECTIVE
To analyze through tomographic studies, the morphology and dimensions of the C1-C2 vertebrae in pediatric patients, to evaluate the possibility of application of Magerl's technique in these patients, and to contribute with data for the usage of the technique in safety.


METHODS
Forty normal cervical tomographies, from patients at an age range of 24-120 months of age and from both genders, were retrospectively analyzed. Data was statistically analyzed to obtain mean value and variations of each measurement: length from the C2's pedicle to C1's lateral mass, thickness of the pedicle of C2, the attack angle of the screw at the C2 isthmus with the horizontal axis and the distance from the odontoid to the anterior arch of C1.


RESULTS
THE MEAN VALUES OBTAINED WERE: length right 30.86 mm, left 31.47 mm; thickness right 5.28 mm, left 5.26 mm; attack angle right 46.25(0) , left 44.50(0) ; distance from odontoid to anterior arch of C1 2,17 mm.


CONCLUSIONS
The Magerl technique, after tomographic study, seems to be a viable option to be used in pediatric patients. Level of Evidence IV, Case Series.
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo - SP, Brazil.
Bárbara Camargo
BC
Chiaramonti
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo - SP, Brazil.
So Yeon
SY
Kim
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo - SP, Brazil.
Luiz Roberto Delboni
LR
Marchese
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo - SP, Brazil.
Olavo Biraghi
OB
Letaif
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo - SP, Brazil.
Raphael Martus
RM
Marcon
Institute of Orthopedics and Traumatology of Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo, São Paulo - SP, Brazil.
Alexandre Fogaça
AF
Cristante
Child; Spinal fusion; Tomography, x-ray computed