title: [MACS-TL polyaxial screw XL. A new concept for increasing stability of ventral spondylodesis in the presence of dorsal injuries].
abstract: The influence of additional dorsal structure damage on anterior stabilization of thoracolumbar fracture is still unknown. Screw cement enhancement is a possibility to reinforce the stability of anterior instrumentation. A new anchorage system has been developed for fixation of anterior stabilization devices, adapted through geometric optimization and the possibility of optional additional cementation after screw insertion in cases of poor bone quality. Is this enhancement strong enough to support a single anterior procedure such as the thoracoscopic technique and still compensate for dorsal instability? A biomechanical in vitro study simulating an anterior corpectomy, strut grafting, and overbridging stabilization with a dorsal laminectomy as dorsal structure damage was performed, and the primary stability parameters were evaluated with and without screw cement enhancement. The additional cementation enhanced the primary stability of the anterior instrumentation and compensated for dorsal instability.
authors.affiliation: Abteilung für Unfall-, Hand- und Wiederherstellungschirurgie, Universität Ulm, Universitätsklinikum, Ulm. Markus.Schultheiss@medizin.uni-ulm.de
authors.forename: M
authors.initials: M
authors.lastname: Schultheiss
authors.forename: H J
authors.initials: HJ
authors.lastname: Wilke
authors.forename: L
authors.initials: L
authors.lastname: Claes
authors.forename: L
authors.initials: L
authors.lastname: Kinzl
authors.forename: E
authors.initials: E
authors.lastname: Hartwig
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001696:Biomechanical Phenomena; D001843:Bone Cements; D001863:Bone Screws; D016025:Bone Transplantation; D004867:Equipment Design; D005260:Female; D006801:Humans; D066298:In Vitro Techniques; D008159:Lumbar Vertebrae / Q000293:injuries* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D016103:Spinal Fractures / Q000601:surgery*; D013123:Spinal Fusion / Q000295:instrumentation*; D013904:Thoracic Vertebrae / Q000293:injuries* / Q000601:surgery
chemical_list: D001843:Bone Cements
vernacular_title: MACS-TL-Polyaxialscrew XL. Ein neues Konzept zur Stabilitätserhöhung ventraler Spondylodesen in Anwesenheit dorsaler Verletzungen.