Clinical Research Directory

Inclusion Criteria: * Patient implanted with Lumis®, Plus® or Ulis® posterior fixation system * Patient of 18 years old and more * Patient has provided signed informed consent or did not oppose to his/her data collection, per local regulation Exclusion Criteria: contra-indication * trauma (i.e., fracture or dislocation) * Known or suspected allergy or intolerance to the implanted material, mainly to metal (e.g., cobalt, chromium, nickel, etc.) * Any other medical or surgical condition likely to compromise the success of instrumented surgery, such as the presence of a malignant tumor or serious congenital abnormalities, raised erythrocyte sedimentation rate not explained by other diseases, high white blood cell count or a tendency to low white blood cell count * All cases not described in the indications * Localized infection of the operative site * All patients with insufficient tissue cover of the operative site * Local signs of inflammation * Fever or leukocytosis * Pathological obesity * Pregnancy * Mental illness * Rapidly evolving joint diseases, bone absorption, osteopenia and/or osteoporosis. Osteoporosis is a relative contraindication, as this medical condition can limit the expected correction gain and stability of mechanical fixation * All cases not requiring bone graft or bone fusion * When pedicular screws are used, absence or malformation of pedicles * All cases requiring a combination of different metals * All patients not agreeing to comply with post-operative instructions