Tratamiento quirúrgico de la pseudoartrosis de la apófisis odontoides: Presentación de dos casos

Two cases of odontoid process non-union treated by direct screw compression through an anterior approach are presented. The outcome was satisfactory in one case. The other required posterior C1-C2 union because of anterior screwing failure. An excessive posterior angulation of the screw thought to be the cause of anterior fusion failure.