3D PRINTED ORTHOPAEDIC FUSION WITH LATERAL APPROACH THROUGH THE INTERVERTEBRAL SPACE FOR LUMBAR LORDOSIS

Wei Cheng, Tianming Guo^*, Jianping Guo, Quanxiang Liu

Orthopaedic second treatment area, Affiliated Hospital of Beihua University, Jilin, Jilin132000, China

Objective: The feasibility and safety of adding a lateral integrated 3 D printing fusion device in a laterolateral lumbar intervertebral fusion procedure (oblique lateral interbody fusion,OLIF) were analyzed.

Methods: 11 patients 2019 were treated with lumbar convex deformity from February 2019 to February 2021.Operation time, intraoperative bleeding, intraoperative and postoperative complications were recorded; compare 1 week postoperative,visual analogue scale (VAS) 3 months and last follow-up, Oswestry disability index (ODI), the MOS item short form health survey (SF-36); preoperative, 1 week, and 3 months postoperative lumbar lordosis ( LL), fused segment lordosis (FSL), sagittal vertical axis (SVA), pelvic incidence (PI), pelvic tilt (PT), sacral slope (SS), Disc height (DH). CT observed the fusion segment fusion rate at 6 months post-surgery.

Results: The average operation time of 11 patients was (187.18±39.29) min, and the mean intraoperative bleeding was (64.45±31.19) ml. Low back pain VAS score,ODI, SF-36 decreased from preoperative score (7.37±1.02), 58.92±11.45, (53.82±12.44) to (0.64±0.49), 11.86±5.25, (77.45±8.97), all statistically significant (P<0.05). Patients were statistically significant in LL, FSL, SVA, PI, PT, SS, DH 3 months after surgery compared to preoperative comparison (P<0.05).SVA and PT were significantly decreased 3 months after operation, with statistical significance (P<0.05) . There was no significant change in PI 3 months after surgery compared with that before surgery (P>0.05). No displacement and sinking complications occurred in the flanking integrated 3 D printed vertebral fusion device at 6 months after surgery. No serious complications such as neurological and vascular injury were observed after surgery.

Conclusion: For patients with lumbar kyphosis, the treatment of flanking integrated 3D printing fusion device has satisfactory clinical effect. It has developed a more minimally invasive way and choice for the treatment of lumbar kyphosis.