Transpseudarthrosis Osteotomy with Interbody Fusion for Kyphotic Spinal Pseudarthrosis in Ankylosing Spondylitis by a Single Posterior Approach: A Retrospective Study and a Brief Relevant Literature Review

Figure 3

The procedure of transpseudarthrosis osteotomy with interbody fusion. (a) The pseudarthrosis lesion area of an ankylosed spine. (b) Posterior elements with irregular osteophytes along with bilateral inferior and superior facet were resected flush with pedicles above and below the pseudarthrosis and the canal was enlarged. (c) A temporary rod was inserted into the screws to maintain the stability. (d–g) The transpseudarthrosis osteotomy was performed using an osteotome, rongeurs, curettes, or high-speed drill. (h) A PEEK cage with autograft inside was carefully inserted into the intervertebral space. (i-j) The final correction was achieved by slowly extending the reduction operating table in combination with compressive pressure on the pedicle screws above and below the inserted cage.

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