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  Indian J Med Microbiol
 

Figure 4: Preoperative three-dimensional model of a patient with kyphotic deformity and severe spine ankylosis. (a) (First stage of the surgery) Posterior view of the cervical spine. Osteotomies were planified according to the model and marked in red. Black dotted line shows the extension of the bone removal. Yellow arrows show the intention to get lordosis from the posterior osteotomies during stage three of the surgery. (b) Anterior view of the three-dimensional cervical spine. Discectomies were made, and lateral extension and uncal osteotomies were planned to “completely disconnect” the posterior from the anterior spine. (c) Oblique view of the three-dimensional model showing the relationship of the anterior extension of the uncal osteotomy with the vertebral artery and the posterior ankylosis. (d) Anterior view of the three-dimensional model showing (yellow arrows) severe ankylosis and planned osteotomies (green). (e) Oblique view of the spine showing “disconnection” in a black dotted line

Figure 4: Preoperative three-dimensional model of a patient with kyphotic deformity and severe spine ankylosis. (a) (First stage of the surgery) Posterior view of the cervical spine. Osteotomies were planified according to the model and marked in red. Black dotted line shows the extension of the bone removal. Yellow arrows show the intention to get lordosis from the posterior osteotomies during stage three of the surgery. (b) Anterior view of the three-dimensional cervical spine. Discectomies were made, and lateral extension and uncal osteotomies were planned to “completely disconnect” the posterior from the anterior spine. (c) Oblique view of the three-dimensional model showing the relationship of the anterior extension of the uncal osteotomy with the vertebral artery and the posterior ankylosis. (d) Anterior view of the three-dimensional model showing (yellow arrows) severe ankylosis and planned osteotomies (green). (e) Oblique view of the spine showing “disconnection” in a black dotted line