... RB, Moe JH ( 197 9) Management of severe spondylolisthe-sis (grade III and IV) in children and adolescents. J Bone Joint Surg (Am) 61:4 79 495 13. Bradford DS, Boachie-Adjei O ( 199 0) Treatment of ... EP ( 197 7) Spondylolisthesis in children and adolescents. J Bone JointSurg (Br) 59: 490 – 494 10. Boos N, Marchesi D, Aebi M ( 199 1) Treatment of spondylolysis and spondylolisthesis withCoutrel-Dubousset ... spondylolis-thesis surgery are:neurologic injury (0.3 9. 1%) [74, 79, 89, 93 ]persistent nerve root deficits (2–3%) [15, 38, 74, 89, 102]non-unions (0– 39% ) [20, 31, 38, 48, 55, 60, 67, 74, 89, 106]progressive...