Spondylolysis and Spondylolisthesis

Spondylolysis is a condition where there is a break in one or both sides of the ring of a vertebra. In Spondylolisthesis, a break in both sides of the ring allows the body of the vertebra to slip forward. Both can result from repetitive bending backward.

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More on Spondylolysis and Spondylolisthesis from the American Academy of Orthopedic Surgeons (AAOS).