Clinical Study Of Unilateral And Bilateral Pedicle Screw Fixation With Intervertebral Body Fusion In Treating Lumbar Degenerative Disease

Objective: To observe the surgical outcome of unilateral and bilateral pedicle screwfixation with intervertebral body fusion for lumbar degenerative disease, analysisbiomechanical stability of unilateral pedicle screw fixation with intervertebral body fusion.Methods: From March2009to October2011，68cases of patients with lumbarspine degenerative disease which have a complete data were retrospectivelyanalyzed.Among them,32cases underwent a unilateral pedicle screw fixation afterdecompression,while36cases experienced a bilateral pedicle screw fixation afterdecompression,as all cases were treated with intervertebral body fusion. It is aimed tomake a comparison between the two sets of operation time and their peri-operativebleeding. Besides, according to the VAS and JOA(Japanese orthopaedic associationtreatment evaluation score) score, it is aimed to evaluate lumbar function improves beforeand after treatment, calculation improve ratio, and follow-up visiting intervertebral bodyfusion condition.Results: The blood loss and operation time between two groups showed remarkabledifference(P<0．05）. After an average of6months follow-up(range，3—9months）for68patients, the follow-up period have not found Cage shift or sinking, pedicle screws loosefracture. VAS and JOA scores between two groups at postoperation showed significantdifference compared with preoperative counterparts(P<0．01).Conclusion: unilateral and bilateral pedicle screw fixation with intervertebral bodyfusion can make lumbar obtain reliable stability, and compared with the latter, the former surgical method is simple, and can shorten the operation time, reduce blood loss and thecomplications.