title: Comparison of tibial plateau angles in normal and cranial cruciate deficient stifles of Labrador retrievers.
abstract: OBJECTIVE
  To investigate tibial plateau angles (TPA) in normal and cranial cruciate ligament (CCL) deficient stifles of Labrador retrievers.
  
  
  METHODS
  Prospective clinical study.
  
  
  METHODS
  Eighty-one client-owned purebred Labrador retrievers.
  
  
  METHODS
  Lateral radiographs of the tibia were obtained from 2 groups of dogs. Group I (42 dogs) had CCL rupture diagnosed by arthrotomy or arthroscopy. Group II (39 dogs) had no history of orthopedic problems, no radiographic evidence of CCL rupture, and dogs were >8 years of age. The tibial axis and the tibial plateau were determined on the radiographs, and the TPA was measured using image measurement software. The TPA measurement results of groups I and II were compared.
  
  
  RESULTS
  Group I (CCL rupture) had a mean TPA (+/-SD) of 23.5 (+/-3.1) degrees, and group II (normal) had a mean TPA (+/-SD) of 23.6 (+/-3.5) degrees. With a P value of.97, no statistical difference was detected between the 2 groups.
  
  
  CONCLUSIONS
  No correlation between the magnitude of TPA and CCL rupture was identified in this group of Labrador retrievers.
  
  
  CONCLUSIONS
  In Labrador retrievers, TPA should not be used as a predictor of CCL rupture.
authors.affiliation: Department for Small Animal Clinical Sciences, College of Veterinary Medicine-Michigan State University, East Lansing, MI, USA.
authors.forename: Ullrich
authors.initials: U
authors.lastname: Reif
authors.forename: Curtis W
authors.initials: CW
authors.lastname: Probst
mesh_terms: D000818:Animals; D016118:Anterior Cruciate Ligament / Q000033:anatomy & histology; D000070598:Anterior Cruciate Ligament Injuries; D001947:Breeding; D016022:Case-Control Studies; D004283:Dog Diseases / Q000453:epidemiology* / Q000235:genetics / Q000473:pathology*; D004285:Dogs / Q000033:anatomy & histology*; D005858:Germany / Q000453:epidemiology; D015994:Incidence; D011446:Prospective Studies; D011996:Records / Q000662:veterinary; D012189:Retrospective Studies; D012422:Rupture, Spontaneous / Q000453:epidemiology / Q000473:pathology / Q000662:veterinary; D013264:Stifle / Q000033:anatomy & histology / Q000293:injuries* / Q000473:pathology; D013977:Tibia / Q000033:anatomy & histology*