title: [Application of small freeze-drying allogeneic bone plots mixed with autologous bone graft in spinal fusion].
abstract: OBJECTIVE
  To investigate the osteoblasts effect, complications and influencing factors in the application of small freeze-drying allogeneic bone plots mixed autologous bone fragments in spinal surgery, and to compare with autogenous bone graft.
  
  
  METHODS
  From January 2003 to January 2007, 515 cases of spinal injuries were treated. A total of 324 cases were treated with small freeze-drying allogeneic bone plots mixed with autologous bone grafts (group A), including 211 males and 113 females with an average age of 36 years (18-83 years). There were 182 cases of thoracolumbar vertebra fracture, 68 cases of lumbar spondylolisthesis, 47 cases of lumbar vertebral canal stenosis, 17 cases of cervical disc herniation, 5 cases of cervical spine fracture-dislocation and 5 cases of thoracolumbar vertebra tumor. The weight of bone graft was 10-60 g (mean 30 g). A total of 191 cases were treated with autogenous bone grafting (group B), including 135 males and 56 females with an average age of 32 years (23-78 years). There were 109 cases of thoracolumbar vertebra fracture, 23 cases of lumbar spondylolisthesis, 17 cases of lumbar vertebral canal stenosis, 19 cases of cervical disc herniation, and 23 cases of cervical spine fracture-dislocation. The weight of bone graft was 10-50 g (mean 25 g).
  
  
  RESULTS
  In group A, effusion of wound increased in 4 cases and the result of bacterial culture was negative; effusion was absorbed after 2 weeks of local irrigation, drainage and cortin management. In group B, no obvious effusion was observed. The follow-up time was 10-36 months (mean 17.4 months) in group A and 8-36 months (mean 16.8 months) in group B. The bone healing was achieved in 308 cases within 4-10 months (mean 8.1 months) and in 184 cases within 4-10 months (mean 5.8 months), and the bone fusion rates were 95.06% and 96.34% in groups A and B, respectively. There was no significant difference in bone fusion rate between groups (P > 0.05). According to Mankin and Komender evaluation standard, the response rates were 95.06% and 96.34% in groups A and B, respectively, showing no significant difference (P > 0.05).
  
  
  CONCLUSIONS
  Mix-bone grafting has the same effective to autologous bone grafting in bone fusion rate. It could be used as the supplement of the autologous bone inadequacy.
authors.affiliation: Department of Spine Surgery, the Second People's Hospital of Shenzhen, Shenzhen Guangdong, 518035, P.R. China.
authors.forename: Changqing
authors.initials: C
authors.lastname: Tian
authors.forename: Zhenyu
authors.initials: Z
authors.lastname: Li
authors.forename: Wenyu
authors.initials: W
authors.lastname: Zhou
authors.forename: Tenghui
authors.initials: T
authors.lastname: Zeng
authors.forename: Shiquan
authors.initials: S
authors.lastname: Sun
authors.forename: Baoxing
authors.initials: B
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016025:Bone Transplantation; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D013123:Spinal Fusion / Q000379:methods*; D013124:Spinal Injuries / Q000601:surgery*; D014184:Transplantation, Homologous; D055815:Young Adult