Fig. 4From: 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 successful fusion of the pars interarticularis defect. Pre-operative image of a patient with stage II pars defects (A). CT showing bilateral fusion at 14 months after pars repair surgery (B)Back to article page