title: [Mechanical consequences of the surgical treatment of lumbar stenosis].
abstract: In a series of 84 cases of lumbar stenosis duly controlled with lateral X-rays at each visit, 7 post-operative slips were discovered (8 p. cent). They occur very early, are moderate and do not seem to become worse. The functional repercussion was actually present on only 2 instances. 5 occurred spontaneously, 2 represented the aggravation of an arthritic spondylolisthesis. The preferred localization is L4-L5 and the slip seems to develop especially on pinched but still thick discs, and spines with an over-lordosis. Multi-levels total lamino-arthrectomy promotes slipping but this wide resection is not an exclusive factor. The knowledge of anatomical factors of risk enables to limit the indication of a stabilizing arthrodesis and the low slipping risk versus the much higher percentage of failure because of insufficient resection, prompts the author to keep performing wide releases on demand.
authors.affiliation: Service de Chirurgie Orthopédique et Traumatologie, Hôpital Delafontaine, Saint-Denis.
authors.forename: J Y
authors.initials: JY
authors.lastname: de La Caffinière
mesh_terms: D001696:Biomechanical Phenomena; D006801:Humans; D007404:Intervertebral Disc Chemolysis; D007796:Laminectomy / Q000009:adverse effects; D008141:Lordosis / Q000209:etiology; D008159:Lumbar Vertebrae / Q000502:physiology* / Q000601:surgery; D013123:Spinal Fusion / Q000009:adverse effects; D013130:Spinal Stenosis / Q000601:surgery*; D013168:Spondylolisthesis / Q000150:complications
vernacular_title: Conséquences mécaniques de la cure chirurgicale de la sténose lombaire.