COMPUTER OPTICAL TOPOGRAPHY: ASSESSING THE RESULTS OF SURGICAL TREATMENT FOR SHEUERMANN’S KYPHOSIS

Objective. To assess a reliability of topographic evaluation of patients with severe Scheuermann’s kyphosis vs X-ray study, to study topographic parameters of posture in the sagittal plane before and after surgery, and to develop 5-point scale for evaluating surgical kyphosis correction using X-ray and topography findings.

Material and Methods. The study included 32 patients with Scheuermann’s disease operated on in the Clinic of Child and Adolescent Vertebrology at the Novosibirsk RITO. Patients were distributed into two groups: those with normal and cranial location of the kyphotic apex (Group 1), and those with caudal location (Group 2). Group 1 included 22 patients (16 males, 6 females, mean age 18.6 ± 3.5 years), and Group 2 – 10 patients (7 males, 3 females, mean age 20.2 ± 4.6 years).

Results. Integral normalized height of kyphosis (HIK) is better consistent with a Cobb angle than any of the primary topographic parameters for kyphosis when severe kyphosis associated with Scheuermann’s disease is estimated. Surgical correction of kyphosis results in statistically significant changes in most of topographic parameters of posture in the sagittal plane. To assess surgery results the 5-point scale was suggested considering the value of kyphosis correction and its postoperative deviation from the norm, which is suitable for both topographic and X-ray findings.

Conclusion. Topographic data may be a supplement to common X-ray data in evaluation of surgical treatment results for Scheuermann’s kyphosis. The suggested complex assessment is close to a patient-reported one, agrees well with a clinical assessment, and can be recommended for use in spine surgeon practice.

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