Although a deep surgical site infection associated with spinal implants can be a devastating adverse event, the prolonged use of peri-operative antibiotics has not been shown to reduce the incidence. Their extended use in routine low risk cases has no proven evidence of benefit but increases the chance of creating resistant bacterial strains. A rational, evidence-based approach is required.
Sources:
Shaffer WO, et al. An evidence-based clinical guideline for antibiotic prophylaxis in spine surgery. Spine J. 2013 Oct;13(10):1387-92. PMID: 23988461.