Spondylolisthesis - Slipped Vertebrae
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Spondylolisthesis results when a vertebra slips out of position in the spine. Degenerated facet joints or a fracture can cause a vertebra to move. With age, the facet joints can deteriorate, weaken and cause one vertebra to slip forward. This condition is called degenerative spondylolisthesis. A stress fracture in the pars on a vertebra (spondylolysis) can lead to isthmic spondylolisthesis, but this is rare occurrence. A vertebra that has moved out of position can press on nerves or narrow the size of the spinal canal (spinal stenosis).
Grade 2: 25-50% of slippage
Grade 3: 50-75% of slippage
Grade 4: Greater than 75% of slippage
Am I at Risk
• In rare cases, spondylolysis can precede spondylolisthesis.
• Degenerative spondylolisthesis occurs most frequently in people over the age of 65.
• Women experience spondylolisthesis more often than men do.
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