PMID- 9449177
OWN - NLM
STAT- MEDLINE
DCOM- 19980224
LR  - 20191024
IS  - 0161-3499 (Print)
IS  - 0161-3499 (Linking)
VI  - 27
IP  - 1
DP  - 1998 Jan-Feb
TI  - Biomechanical comparison of the Herbert and AO cortical bone screws for 
      compression of an equine third carpal bone dorsal plane slab osteotomy.
PG  - 49-55
AB  - OBJECTIVE: To assess feasibility of insertion of 4.5-mm Herbert cannulated bone 
      screws (HS) using fluoroscopic guidance and compare the mechanical shear strength 
      of these HS and 4.5-mm AO cortical bone screws (AO) for fixation of dorsal plane 
      slab osteotomies in equine cadaver third carpal bones (C3). ANIMALS OR SAMPLE 
      POPULATION: Eight equine cadavers. METHODS: Bone mineral composition and density 
      of contralateral C3 were confirmed to be equivalent using dual-energy x-ray 
      absorptiometry. A standard 10-mm C3 slab osteotomy was reduced using HS or AO 
      instrumentation under fluoroscopic guidance. Specimens were loaded in shear until 
      failure, using a materials testing apparatus. RESULTS: HS and AO instrumentation 
      allowed accurate reconstruction of the osteotomy, but there was difficulty 
      encountered seating the HS proximal self-tapping threads. There was no 
      significant difference in maximal load to failure, stiffness, or mode of failure 
      of constructs created with the HS and AO screws. CONCLUSIONS: Use of 4.5-mm HS 
      for repair of C3 radial facet, dorsal plane slab fractures may result in a 
      mechanically comparable fixation to a repair using a 4.5-mm AO. Equine dorsal C3 
      may be too dense, however, to allow placement of the proximal self tapping 
      threads of the HS without potentially excessive application of torque to the 
      screw itself. CLINICAL RELEVANCE: Dorsal plane, radial facet slab fractures of 
      the equine C3 are a significant clinical problem. Accurate reconstruction and 
      stabilization are necessary for return to athletic function.
FAU - Murray, R C
AU  - Murray RC
AD  - Centre for Equine Studies, Suffolk, England.
FAU - Gaughan, E M
AU  - Gaughan EM
FAU - Debowes, R M
AU  - Debowes RM
FAU - Hoskinson, J J
AU  - Hoskinson JJ
LA  - eng
PT  - Comparative Study
PT  - Journal Article
PL  - United States
TA  - Vet Surg
JT  - Veterinary surgery : VS
JID - 8113214
SB  - IM
MH  - Absorptiometry, Photon/veterinary
MH  - Animals
MH  - Bone Density/physiology
MH  - Bone Screws/*veterinary
MH  - Cadaver
MH  - Carpus, Animal/diagnostic imaging/physiology/*surgery
MH  - Female
MH  - Fluoroscopy/methods/veterinary
MH  - Horses/*surgery
MH  - Male
MH  - Osteotomy/methods/*veterinary
MH  - Surgical Equipment/veterinary
EDAT- 1998/02/04 00:00
MHDA- 1998/02/04 00:01
CRDT- 1998/02/04 00:00
PHST- 1998/02/04 00:00 [pubmed]
PHST- 1998/02/04 00:01 [medline]
PHST- 1998/02/04 00:00 [entrez]
AID - S0161349998000052 [pii]
AID - 10.1111/j.1532-950x.1998.tb00097.x [doi]
PST - ppublish
SO  - Vet Surg. 1998 Jan-Feb;27(1):49-55. doi: 10.1111/j.1532-950x.1998.tb00097.x.