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Related to Pars interarticularis: Ligamentum flavum, spondylolisthesis
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We hypothesized that the width between the pars interarticularis is greater at lower levels of the lumbar spine than at higher levels.
14) In type 1 fractures (Figure 11), the fracture extends through the posterior C2 vertebral body rather than the pars interarticularis extension of the hangman's fracture.
Ogawa and associates (7) hypothesized that multi-level spondylolysis results from fatigue fractures of the pars interarticularis, which underlie most cases of single-level spondylolysis as well.
The lateral radiograph of the cervical spine showed the presence of a defect of the pars interarticularis at C6.
The initial lateral radiograph of the cervical spine showed a fracture through the pars interarticularis of C2 (Figure 1).

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