title: Treatment of a nonunion, secondary to gunshot fracture, of the distal radius with circular external fixation and rhBMP-2 in a cat.
abstract: OBJECTIVE
  To report the successful use of recombinant human bone morphogenetic protein-2 (rhBMP-2) in the treatment of an antebrachial non-union, secondary to gunshot fracture, stabilized with circular external fixation in a cat.
  
  
  METHODS
  Following a diagnosis of a highly comminuted gunshot fracture of the distal right radius and ulna, the fracture was stabilized with a circular external fixation. A two-ring frame was placed in closed fashion.
  
  
  RESULTS
  The skin wound healed uneventfully by second intention in 21 days. Twenty-eight weeks after external fixation, bone healing was absent. 0.8mL of 0.2mg/mL of rhBMP-2 in two collagen sponges was placed in the bone defect. Eight weeks after rhBMP-2 implantation, an early bone healing response was noted on radiographic evaluation. Sixteen weeks after rhBMP-2 implantation, fracture union was achieved.
  
  
  CONCLUSIONS
  To the authors' knowledge, 160 μg is the lowest reported dose of rhBMP-2 that leads to bony union in a cat. However as an individual case study, this report can not be used as evidence that rhBMP-2 at this lower dose is appropriate for use in all cats. Further studies are needed to establish the minimum efficient dose of rhBMP-2 in cats.
authors: CHEVAC, VetAgro Sup, Campus Vétérinaire de Lyon / ENSV, , 1 avenue Bourgelat, 69280 Marcy L'Etoile, France. f.arnault@vetagro-sup.fr
authors: F
authors: F
authors: Arnault
authors: P
authors: P
authors: Maitre
authors: T
authors: T
authors: Cachon
authors: C
authors: C
authors: Carozzo
authors: D
authors: D
authors: Fau
authors: J-P
authors: JP
authors: Genevois
authors: E
authors: E
authors: Viguier