Three cases came with neurological affection. Neck pain with limitation of the neck movement was the complaint for the all cases. Male ratio was predominant in our study: 75% with a mean age 34.4 years. All patients underwent posterior cervical fixation C1–C2 by polyaxial screw Harms technique. All patients underwent full laboratory, medical, and neurological evaluation and imaging study on the cervical spine. Patient and methodsīetween January 2015 and January 2018, 12 patients were introduced to the neurosurgical department at the Sohag University Hospital with post-traumatic type II odontoid fracture with failure of conservative treatment and not suitable for anterior odontoid screws. We used the Frankel grading system to evaluate the postoperative neurological state. This is a retrospective case series study. Our aim in this study is to evaluate Harms technique in patients regarding pain improvement and restoration of the motor power and to report the complications. Use of polyaxial screws in Harms technique gives the best results in maintaining majority of the biomechanics. Limitation of the odontoid screws in some cases gives the chance of posterior cervical fixation to have the superior role. Odontoid fracture type II is considered an unstable fracture with a high rate of nonunion in conservative treatment. The biomechanics in the atlantoaxial joint carry more than 50% of the rotational movement which can be affected in transverse ligament tear associated with odontoid fracture type II. Cervical trauma is a common cause of disability following spinal cord injury especially in athletic populations.
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