[Different interbody fustion cages and combined fixation through intermuscular approach for lumbar diseases:a case control study].

OBJECTIVE: To explore the clinical effect of combined fixation and interbody bone grafting through intermuscular approach with different fusion cages in the treatment of single segment lumbar diseases. METHODS: in 17 cases. According to the application of different interbody fusion cage, patients were divided into single common cage group, double common cage group and banana type cage group. The operation time, intraoperative hemorrhage, postoperative incision drainage fluid and incision length were observed in three groups; VAS score of lumbar incision and JOA score of preoperative and final follow up were recorded 72 hours after operation;the intervertebral space height, Cobb angle of lumbar coronal and sagittal plane before and after operation, and interbody fusion 12 months after operation were observed by imaging data. RESULTS: <0.05). The incidence of single common fusion cage group was 10%(4 / 42), that of double common fusion cage group was 9%(4 / 43), and that of banana fusion cage group was 10%(4 / 39). There was no significant difference among the three groups. CONCLUSION: Through the intermuscular approach, single pedicle screw and contralateral facet screw were used for fixation, and single common fusion cage, double common fusion cage or banana type fusion cage were used for interbody grafting to treat single segment lumbar disease. Although the application of different fusion cage could not increase the axial strength of fixed segment, the speed of fusion was accelerated by increasing the contact area, and the quality of the fusion cage reduces the settlement of the cage and the loss of the height of the intervertebral space. Therefore, two interbody fusion cages implanted in one side are of positive clinical significance for the fixation of unilateral pedicle screw combined with contralateral facet screw, without prolonging the operation time and increasing the complications.