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7 Cards in this Set
- Front
- Back
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What are the two classic radiographic features?
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Trapezoidal L5
Rounded S1 |
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What is the normal value of sacral inclination? What is the significance of greater inclination?
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Normal inclination >30 degrees
More vertical sacrum: increased risk of slip |
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How is the slip angle measured? What values are considered normal?
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Lordosis at L5-S1
Normal<0 (kyphotic) |
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What nerve root is most commonly affected? Why are nerve root signs especially common with dysplastic spondylolisthesis?
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L5 at risk
Especially common because posterior arch is intact |
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Is there a proven clinical benefit to spondylolisthesis reduction?
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No
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If a reduction is preformed, when is the nerve root most likely to be injured?
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During the last 50% of reduction
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Is there a proven benefit to decompression?
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No
Fusion with or without decompression leads to good outcomes |
