title: Stabilization of the CORA based leveling osteotomy for treatment of cranial cruciate ligament injury using a bone plate augmented with a headless compression screw.
abstract: OBJECTIVE
  To report the effectiveness of a bone plate/headless compression screw (HCS) construct in preventing tibial plateau angle (TPA) shift postoperatively and to describe radiographic healing of the osteotomy.
  
  
  METHODS
  Case series.
  
  
  METHODS
  Dogs (n = 31).
  
  
  METHODS
  Records of dogs diagnosed with cranial cruciate ligament (CCL) injury treated with the center of rotation of angulation (CORA) based leveling osteotomy (CBLO) stabilized with a bone plate augmented with a HCS were reviewed. Breed, age, weight, and gender were recorded. Radiographs were reviewed for determination of preoperative tibial plateau angle (PreTPA), postoperative TPA (PostTPA), patellar tendon angle (PTA) postoperatively, and TPA at final evaluation (FinalTPA). Difference between PostTPA and FinalTPA was used to define any TPA shift. Radiographic healing at final evaluation was graded based on a 5-point scale.
  
  
  RESULTS
  Mean time to final recheck was 88 days (range 49-237 days) with mean ± SD PreTPA = 28.6 ± 4.8°; PostTPA = 9.2 ± 2.2°; FinalTPA = 9.7 ± 2.6°; and TPA Shift = 0.52 ± 1.61°. There was no significant difference between PostTPA and FinalTPA (P = .084, power > 0.80). Mean postoperative PTA was 89.9 ± 1.7°. There were 2 implant related complications; 1 HCS migration and 1 HCS failure.
  
  
  CONCLUSIONS
  Stabilization of the CBLO using a bone plate augmented with a HCS was effective in maintaining PostTPA and achieving satisfactory radiographic healing.
authors.affiliation: Capital Area Veterinary Specialists, Austin, TX 10065, USA. matthew.raske@amcny.org
authors.forename: Matthew
authors.initials: M
authors.lastname: Raske
authors.forename: Don
authors.initials: D
authors.lastname: Hulse
authors.forename: Brian
authors.initials: B
authors.lastname: Beale
authors.forename: W Brian
authors.initials: WB
authors.lastname: Saunders
authors.forename: Erin
authors.initials: E
authors.lastname: Kishi
authors.forename: Christopher
authors.initials: C
authors.lastname: Kunze
mesh_terms: D000818:Animals; D016118:Anterior Cruciate Ligament / Q000473:pathology / Q000601:surgery; D000070598:Anterior Cruciate Ligament Injuries; D001860:Bone Plates / Q000662:veterinary*; D001863:Bone Screws / Q000662:veterinary*; D004283:Dog Diseases / Q000601:surgery*; D004285:Dogs; D010027:Osteotomy / Q000295:instrumentation / Q000379:methods / Q000662:veterinary*; D013264:Stifle / Q000473:pathology / Q000601:surgery