title: Locking and nonlocking plate fixation pubic symphysis diastasis management.
abstract: We evaluated the stability of locking and nonlocking plate fixation of the pubic symphysis in a cadaveric model of an unstable pelvic injury. Five fresh cadaver pelves--intact and with an unfixed simulated Tile B injury--were tested under compressive load simulating a 2-legged stance. On each pelvis, 3 pubic symphysis fixation constructs were tested: a 4-hole unicortical locking plate, a 4-hole bicortical locking plate, and a 4-hole bicortical compression plate. There were no significant differences in displacement among the 3 fixation methods tested on Tile B pelvic simulations. Symphysis pubis fixation alone reduced the anterior superior pubic symphysis mean gap displacement by 95% and the anterior inferior pubic symphysis by 78%, compared with the noninstrumented Tile B injury. There is no evidence that anteriorly placed locking constructs confer an advantage, in terms of pubic symphysis stability, over standard anterior compression plates for Tile B injuries.
authors: Department of Surgery, Section of Orthopaedics, The University of Kansas School of Medicine, Wichita, KS, USA.
authors: Bradley C
authors: BC
authors: Daily
authors: Alexander C M
authors: AC
authors: Chong
authors: Bruce R
authors: BR
authors: Buhr
authors: Clay B
authors: CB
authors: Greeson
authors: Francis W
authors: FW
authors: Cooke
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D001696:Biomechanical Phenomena; D001860:Bone Plates; D002102:Cadaver; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D046548:Pubic Symphysis Diastasis / Q000503:physiopathology / Q000601:surgery*