title: Transdiscal L5-S1 screws for the treatment of adult spondylolisthesis.
abstract: OBJECTIVE
  The aim of the study was to evaluate clinical and radiographic outcome of patients treated with a modified Grob technique analysing the advantages related to increased mechanical stability.
  
  
  METHODS
  30 patients that underwent "in situ" fusion for L5-S1 spondylolisthesis were evaluated. All patients presented a low-dysplastic developmental L5-S1 spondylolisthesis. Patients were divided into two groups: A, in which L5-S1 pedicle instrumentation associated with transsacral screw fixation was performed, and B, in which L5-S1 pedicle instrumentation associated with a posterolateral interbody fusion (PLIF) was performed.
  
  
  RESULTS
  Patients treated with transdiscal L5-S1 fixation observed a faster resolution of the symptoms and a more rapid return to daily activities, especially at 3-6 months' follow-up. The technique is reliable in giving an optimal mechanical stability to obtain a solid fusion.
  
  
  CONCLUSIONS
  The advantages of this technique are lower incidence of neurologic complications, speed of execution and faster return to normal life.
authors.affiliation: Department of Orthopedic Science and Traumatology Spine Surgery Division, Catholic University Rome, Largo A Gemelli 1, 00168 Rome, Italy.
authors.forename: C A
authors.initials: CA
authors.lastname: Logroscino
authors.forename: F C
authors.initials: FC
authors.lastname: Tamburrelli
authors.forename: L
authors.initials: L
authors.lastname: Scaramuzzo
authors.forename: G R
authors.initials: GR
authors.lastname: Schirò
authors.forename: S
authors.initials: S
authors.lastname: Sessa
authors.forename: L
authors.initials: L
authors.lastname: Proietti
mesh_terms: D000328:Adult; D000368:Aged; D001863:Bone Screws; D005260:Female; D005500:Follow-Up Studies; D006305:Health Status Indicators; D006801:Humans; D007403:Intervertebral Disc / Q000601:surgery*; D008137:Longitudinal Studies; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010147:Pain Measurement; D011859:Radiography; D012189:Retrospective Studies; D012447:Sacrum / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D013123:Spinal Fusion / Q000379:methods*; D013168:Spondylolisthesis / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D016896:Treatment Outcome