Background context:

Conservative methods are the traditional options in management of Lumber Spondylolysis while operative interference is indicated for symptomatic not responding patients to medical treatment and cases with multilevel pars defect.

Purpose:

The aim of this prospective study is to evaluate the clinical, functional and radiological results of using bone graft and fixation with pedicular screw rod laminar hook construct in treatment of Lumber Spondylolysis.

Patients and methods:

Between October 2017 and January 2020, twenty patients with symptomatic lumbar spondylolysis not responding to conservative treatment more than 6 months were treated by defect reconstruction fixation using bone block autografting and pedicular screw laminar hook construct. The mean follow-up time was 12.5 ± 3.5 months. All patients were examined pre, postoperative and followed up clinically {pain (Visual Analogue Scale VAS)}, functionally {Oswestry Disability Index(ODI), Modified Prolo Functional Economic Scales (MPFES) and Macaneb’s criteria}, radiologically (pars defect healing). Perioperative outcomes and complications were documented.

Results:

Clinical, radiological and functional outcomes were significantly improved. Bony union was evident in all patients (100%). Blood loss, operative time and hospital stay increased in case with multilevel pars defect and cases with associated injuries. Two cases reported complications in this study as misplaced pedicular screw and superficial wound infection.

Conclusion:

Reconstruction fixation of pars defect using this construct is an effective feasible procedure in treatment of lumbar spondylosis regarding preservation of lumbar motion and avoidance of adjacent segment problems after fusion.