title: Is it possible to preserve lumbar lordosis after hybrid stabilization? Preliminary results of a novel rigid-dynamic stabilization system in degenerative lumbar pathologies.
abstract: OBJECTIVE
  To evaluate the results of a novel rigid-dynamic stabilization technique in lumbar degenerative segment diseases (DSD), expressly pointing out the preservation of postoperative lumbar lordosis (LL).
  
  
  METHODS
  Forty-one patients with one level lumbar DSD and initial disc degeneration at the adjacent level were treated. Circumferential lumbar arthrodesis and posterior hybrid instrumentation were performed to preserve an initial disc degeneration above the segment that has to be fused. Clinical and spino-pelvic parameters were evaluated pre- and postoperatively.
  
  
  RESULTS
  At 2-year follow-up, a significant improvement of clinical outcomes was reported. No statistically significant difference was noted between postoperative and 2-year follow-up in LL and in disc/vertebral body height ratio at the upper adjacent fusion level.
  
  
  CONCLUSIONS
  When properly selected, this technique leads to good results. A proper LL should be achieved after any hybrid stabilization to preserve the segment above the fusion.
authors.affiliation: Clinica Ortopedica - IRCCS Azienda Ospedaliera Universitaria San Martino - IST, Istituto Nazionale per la Ricerca sul Cancro, Largo Rosanna Benzi, 10, 16132, Genoa, GE, Italy. dott.formica@gmail.com.
authors.forename: Matteo
authors.initials: M
authors.lastname: Formica
authors.affiliation: Clinica Ortopedica - IRCCS Azienda Ospedaliera Universitaria San Martino - IST, Istituto Nazionale per la Ricerca sul Cancro, Largo Rosanna Benzi, 10, 16132, Genoa, GE, Italy.
authors.forename: Luca
authors.initials: L
authors.lastname: Cavagnaro
authors.affiliation: Clinica Ortopedica - IRCCS Azienda Ospedaliera Universitaria San Martino - IST, Istituto Nazionale per la Ricerca sul Cancro, Largo Rosanna Benzi, 10, 16132, Genoa, GE, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Basso
authors.affiliation: Clinica Ortopedica - IRCCS Azienda Ospedaliera Universitaria San Martino - IST, Istituto Nazionale per la Ricerca sul Cancro, Largo Rosanna Benzi, 10, 16132, Genoa, GE, Italy.
authors.forename: Andrea
authors.initials: A
authors.lastname: Zanirato
authors.affiliation: Clinica Ortopedica - IRCCS Azienda Ospedaliera Universitaria San Martino - IST, Istituto Nazionale per la Ricerca sul Cancro, Largo Rosanna Benzi, 10, 16132, Genoa, GE, Italy.
authors.forename: Lamberto
authors.initials: L
authors.lastname: Felli
authors.affiliation: CVCO - IRCCS Istituto Ortopedico Galeazzi, Via Riccardo Galeazzi 4, 20161, Milan, MI, Italy.
authors.forename: Carlo
authors.initials: C
authors.lastname: Formica
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D055959:Intervertebral Disc Degeneration / Q000150:complications / Q000601:surgery*; D008141:Lordosis / Q000150:complications*; D008159:Lumbar Vertebrae / Q000601:surgery*; D008161:Lumbosacral Region / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D012189:Retrospective Studies; D013123:Spinal Fusion / Q000379:methods*; D016896:Treatment Outcome
keywords: Degenerative lumbar diseases; Dynamic stabilization; Hybrid stabilization; Interbody fusion; Lumbar lordosis; Sagittal balance