title: [Comparison of screw' inserting angle through the 11th and 12th rib anterior approaches for L1 burst fracture].
abstract: OBJECTIVE
  To compare screw's inserting angle through the 11th and 12th rib in treating L1 burst fracture, explore effects on inserting screw and postoperative angle.
  
  
  METHODS
  From October 2007 to October 2010, 108 patients with L1 brust fracture treated through anterior approach were analyzed,including 68 males and 40 females, aged from 21 to 64 years (mean 38.22 years). All patients were divided into the 11th (A, 51 cases) and 12th (B, 57 cases) approach. The data of operation time,blood loss, duration of incision pain, JOA score, Oswestry score, VAS score, quality of life (SF-36), recovery of nervous function, coronal Cobb angle, included angle between screw and plate were observed.
  
  
  RESULTS
  All patients were followed up for 9 to 37 months, mean 23 months. The operation time, blood loss, duration of incision pain, in group A were lower than group B (P<0.05), JOA score, Oswestry score, VAS score, SF-36, recovery of nervous function had no significant differences (P>0.05). There were no differences in Cobb angle before operation, but had significance after operation (P=0.000). There were statistically significance between two group in angle between screw and plate (P=0.000, P=0.003).
  
  
  CONCLUSIONS
  The 11th rib approach for the treatment of L1 burst fracture has less effects on screw, less trauma and less angle between screw and plate.
authors.affiliation: Department of Orthopaedics, West China Hospital, Sichuan University, Chengdu 600041, Sichuan, China.
authors.forename: Li-Tai
authors.initials: LT
authors.lastname: Ma
authors.forename: Hao
authors.initials: H
authors.lastname: Liu
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.forename: Yue-Ming
authors.initials: YM
authors.lastname: Song
authors.forename: Fu-Xing
authors.initials: FX
authors.lastname: Pei
authors.forename: Li-Min
authors.initials: LM
authors.lastname: Liu
authors.forename: Quan
authors.initials: Q
authors.lastname: Gong
authors.forename: Jian-Cheng
authors.initials: JC
authors.lastname: Zeng
authors.forename: Gan-Jun
authors.initials: GJ
authors.lastname: Feng
authors.forename: Zhong-Jie
authors.initials: ZJ
authors.lastname: Zhou
mesh_terms: D000328:Adult; D001863:Bone Screws; D005260:Female; D005593:Fracture Fixation, Internal / Q000009:adverse effects / Q000295:instrumentation*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D020127:Recovery of Function; D012253:Rib Fractures / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000601:surgery*; D012272:Ribs / Q000601:surgery*; D013116:Spinal Cord / Q000503:physiopathology; D014057:Tomography, X-Ray Computed; D055815:Young Adult