Fig. 5From: Factors associated with non-fusion after direct pars repair of lumbar spondylolysis with pedicle screw and lamina hook: a clinical and CT-assessed studyRepresentative axial CT images of non-fusion of spondylolysis after pars repair surgery. Pre-operative image of a patient with stage III pars defects (A). CT showing bilateral non-fusion at 12 months after pars repair surgery (B)Back to article page