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Fig. 4 | BMC Musculoskeletal Disorders

Fig. 4

From: Evaluation of parallel endplate osteotomy for severe rigid spinal deformities: a retrospective analysis of 36 cases with a minimum 2-year follow-up

Fig. 4

The PEO osteotomy grade classification. A Grade I: For scoliosis and kyphosis angle less than 80°, PEO with a single vertebra is recommended. B Grade II: For scoliosis and kyphosis (80°-100°), PEO with a single vertebra and the intervertebral disc is recommended. C Grade III: For scoliosis and kyphosis (101°-120°), PEO with two or more vertebrae and the intervertebral disc is recommended. D Grade IV: For scoliosis and kyphosis angle more than 120°, PEO with two or more vertebrae and the intervertebral disc is recommended. According to the severity of spinal cord folds, blood supply, tolerance of spinal cord twists, electrophysiological monitoring or wake-up experiments are used to determine whether to add titanium mesh implants for the front support of the vertebra

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