The study aims to study the impact on different surgical approaches for lumbar active discopathy. This inflammatory disease of the disc and adjacent vertebral endplates can induce low back pain with inflammatory-like features. Lumbar fusion is proposed to the patient when conservative management is not enough. This fusion can be obtained by an anterior muscle sparring approach or by a posterior muscle decaying approach. The goal with this single center retrospective study is to identify the surgical approach that offers to the patient the better long term functional outcome. A phone call would allow us to ask patients a few questions: * Mcnab's criteria * Roland Morris Disability Questionnaire The patients medical file review would also allow us to identify: * the length of hospital stay for the discectomy (in days) * incidence of Failed Back Surgery Syndrome * incidence of redo surgeries * incidence of adjacent level diseases * incidence of dural tears and eventual complications (meningitis, orthostatic headaches,...) * incidence of iliac vessels injuries and eventual complications (thrombosis, need for revascularisation,...)
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Modified Macnab Criteria
Timeframe: At the time of the phone call, up to 11 years after the surgery