title: Fractures in regions of adaptive modeling and remodeling of central tarsal bones in racing Greyhounds.
abstract: OBJECTIVE
  To evaluate and compare bone modeling and remodeling in fractured and non-fractured central tarsal bones (CTBs) of racing Greyhounds.
  
  
  METHODS
  Paired cadaveric tarsi from 6 euthanized racing Greyhounds with right CTB fractures and 6 racing Greyhounds with other nontarsal injuries.
  
  
  METHODS
  CTBs were dissected and fractured CTBs were reconstructed. Central tarsal bones were evaluated through standard and nonscreen high-detail radiography, computed tomography, and histologic examination. The bone mineral density (BMD) was calculated adjacent to fracture planes and as a gradient on sagittal computed tomographic images. Sagittal and transverse plane sections of bone were obtained and submitted for subjective histologic assessment. Linear mixed-effects models were used to compare findings.
  
  
  RESULTS
  Fractured right CTBs had greater BMD in the dorsal and midbody regions of the sagittal plane sections than did nonfractured CTBs. The BMD ratios from bone adjacent to the dorsal slab fracture planes were not different between fractured and nonfractured right CTBs.
  
  
  CONCLUSIONS
  Findings supported the existence of site-specific bone adaptation in CTBs of Greyhounds, with modeling and remodeling patterns that were unique to fractured right CTBs. The dorsal and midbody regions of fractured bones had greater BMD, and fractures occurred through these zones of increased BMD.
authors.affiliation: Department of Veterinary Clinical Sciences and Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH 43210, USA. msbergh@iastate.edu
authors.forename: Mary Sarah
authors.initials: MS
authors.lastname: Bergh
authors.forename: Alessandro
authors.initials: A
authors.lastname: Piras
authors.forename: Valerie F
authors.initials: VF
authors.lastname: Samii
authors.forename: Steven E
authors.initials: SE
authors.lastname: Weisbrode
authors.forename: Kenneth A
authors.initials: KA
authors.lastname: Johnson
mesh_terms: D000818:Animals; D015519:Bone Density; D016723:Bone Remodeling / Q000502:physiology*; D004285:Dogs / Q000293:injuries*; D015775:Fractures, Stress / Q000000981:diagnostic imaging / Q000473:pathology / Q000503:physiopathology / Q000662:veterinary*; D006801:Humans; D013639:Tarsal Bones / Q000000981:diagnostic imaging / Q000293:injuries* / Q000473:pathology; D013643:Tarsus, Animal / Q000000981:diagnostic imaging / Q000293:injuries* / Q000473:pathology; D014057:Tomography, X-Ray Computed