Numerous surgical techniques have been described for the treatment of spondylolysis and spondylolisthesis. This case report involves the use of a technique for pars defect repair originally described by James Scott of Edinburgh. Our patient, an 18-year-old woman, was initially treated for bilateral injury to the pars interarticularis with non-operative methods, but the results proved unsuccessful. She then underwent bilateral pars repair at L3 and L4 using iliac bone grafting and wiring of the transverse processes and spinous processes of the involved vertebrae. Follow-up radiographs showed complete fusion of the right pars defects at L3 and L4 and incomplete fusion of the left pars defect. The procedure effectively restored spine stability and repaired the pars defects.