title: Is local bone viable as a source of bone graft in posterior lumbar interbody fusion?
abstract: METHODS
  Radiographic evaluation of bony union and clinical outcome were investigated after posterior lumbar interbody fusion (PLIF) performed with only local bone.
  
  
  OBJECTIVE
  To examine the viability of local bone for bone graft in PLIF.
  
  
  BACKGROUND
  Different sources of bone graft have been used for PLIF. Autologous iliac bone is most likely suitable for biologic bone healing ability, but there may be some questions such as donor site pain. Allograft and artificial bones are less effective for bone healing. Use of local bone could be a solution. However, the quality of local bone is still being questioned and there is hesitation to use local bone alone.
  
  
  METHODS
  Thirty-two patients underwent PLIF (24 single-level and 8 double-level) using the Brantigan I/F Carbon Cage filled with local bone and segmental pedicle screw fixation. At 3, 6, and 12 months after surgery, "parallel AP view radiograph" was obtained to evaluate bony union status. Average follow-up period was 26 months. Clinical outcome was also evaluated by the Japanese Orthopedic Association clinical score.
  
  
  RESULTS
  The bony union rate was 16.7%, 72.4%, and 100% at 3, 6, and 12 months after surgery, respectively. Clinically, the average of JOA scores was improved significantly (P < 0.001). The improvement rate was 72.9% (12 mo) and 76.8% (24 mo) on average.
  
  
  CONCLUSIONS
  A 100% bony union rate was obtained 12 months after PLIF with only local bone. The results showed that clinical viability of local bone as a source of bone graft in PLIF.
authors.affiliation: Department of Orthopaedic Surgery, Toyohashi Municipal Hospital, Aotake-cho, Toyohashi, Aichi, Japan. ymtyhs@aol.com
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Miura
authors.forename: Shiro
authors.initials: S
authors.lastname: Imagama
authors.forename: Masaki
authors.initials: M
authors.lastname: Yoda
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Mitsuguchi
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Kachi
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D016025:Bone Transplantation; D001842:Bone and Bones / Q000503:physiopathology / Q000601:surgery*; D005260:Female; D006085:Graft Survival; D006801:Humans; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013122:Spinal Diseases / Q000000981:diagnostic imaging / Q000601:surgery*; D013123:Spinal Fusion / Q000379:methods*; D013168:Spondylolisthesis / Q000000981:diagnostic imaging / Q000601:surgery; D016896:Treatment Outcome; D014945:Wound Healing