Knee

Authors: Leitner M, Pearce SG, Windolf M, Schwieger K, Zeiter S, Schawalder P, Johnson KA.
Journal: Vet Surg

OBJECTIVE: To compare locking screws with conventional screws inserted in the tibial plateau fragment for reduction and stability of the construct after tibial plateau leveling osteotomy (TPLO), using a locking TPLO plate. STUDY DESIGN: Experimental biomechanical study. ANIMALS: Cadaveric canine pelvic limbs (n=8 pairs). METHODS: TPLO was stabilized with either conventional cortical screws or locking screws in a compressed osteotomy model. Titanium pins inserted into the tibial plateau and proximal metaphysis were used to track bone fragment location by computed tomography (CT) imaging.

Authors: Drygas KA, Taylor R, Sidebotham CG, Hugate RR, McAlexander H.
Journal: Vet Surg

OBJECTIVE: To report surgical planning, technique, and long-term outcome of custom transcutaneous tibial implants used to restore ambulation after bilateral pelvic limb amputation in a dog. STUDY DESIGN: Case report. ANIMALS: A 4-year-old, 25.5 kg, female spayed, Siberian Husky. METHODS: Computed tomographic scans of the pelvic limbs were used to build sterolithographic models of the remaining tibia after bilateral amputation of the distal aspect of the tibiae. The sterolithographic models facilitated fabrication of implants that would replace the missing distal segments of the tibiae.

Authors: Krayer M, Rytz U, Oevermann A, Doherr MG, Forterre F, Zurbriggen A, Spreng DE.
Journal: Am J Vet Res

Objective-To describe the presence and amount of apoptotic ligamentous cells in different areas of partially ruptured canine cranial cruciate ligaments (prCCLs) and to compare these findings with apoptosis of ligamentous cells in totally ruptured cranial cruciate ligaments (trCCLs). Animals-20 dogs with prCCLs and 14 dogs with trCCLs. Procedures-Dogs with prCCLs or trCCLs were admitted to the veterinary hospital for stifle joint treatment.

Authors: Whatmough C, Moores AP, Magalhaes RS, Lamb CR.
Journal: Vet Rad Ultrasound

Caudocranial stifle radiographs with variations in positioning were made in two greyhound cadavers. Radiographs were repeated after each of three interventions: cranial cruciate desmotomy; release of the caudal horn of the medial meniscus; complete medial meniscectomy. The joint space on medial and lateral aspects of the joint was measured by a observer who was unaware of positioning or intervention. One dog had significantly wider joint space than the other (1.0 vs. 1.5mm). The lateral aspect of the joint space was wider than the medial aspect (1.7 vs. 0.7 mm).

Authors: P. Guillaumot1, S. Scotti2, C. Carozzo3, B. Bouvy1, J.-P. Genevois3
Journal: VCOT

A transverse patellar fracture in a six-month-old cat was successfully treated by figure-of-eight dorsal wiring of the patella. A longitudinal patellar fracture with luxation of a large medial fragment in a 2.5-year-old cat was treated by lateral marginal patellectomy with a positive outcome.

Authors: E. Kulendra1, K. Lee2, S. Schoeniger3, A. P. Moores1,3
Journal: VCOT

An 11-month-old neutered female crossbreed dog was admitted with left pelvic limb lameness. Radiographs and computed tomography identified an osteochondritis dissecans- (OCD) like lesion in the intercondylar fossa of the femur originating from the axial aspect of the medial femoral condyle. Stifle arthrotomy was performed in order to remove the bony fragment. It was concluded that the clinical features and location of this lesion indicate an osteochondritis dessicans-like lesion.

Category: Knee - Pediatrics
Authors: S. A. Lister, J. K. Roush, W. C. Renberg
Journal: VCOT

Pre-operative digital radiographs from 50 dogs undergoing a tibial plateau leveling osteotomy were evaluated. Tibial plateau angles were measured directly on printed films and measured on digital images using two different commercial DICOM viewers. The radiographs were scored for osteoarthritis and positioning. Using pooled results, the mean TPA from the digital images employing Web1000 (26.47° ± 3.90) was significantly higher then the mean TPA using film radiographs (25.41° ± 3.51), or IQ-View Pro (25.48° ± 3.89).

Category: Knee
Authors: D. B. Guastella1, D. B. Fox2, J. L. Cook2
Journal: VCOT

Objectives: To compare tibial plateau angle (TPA) among Labrador Retrievers, Rottweilers, Boxers, and German Shepherd Dogs that had undergone tibial plateau leveling osteotomies (TPLO) for cranial cruciate ligament disease, and to determine if higher TPAs are associated with increased risk for concurrent meniscal injury. Methods: This was a retrospective study including 275 client-owned dogs of one of the four aforementioned breeds that received TPLO radiographs between 1999 and 2005 prior to undergoing the TPLO procedure.

Authors: A. Shipov, R. Shahar, R. Joseph, J. Milgram
Journal: VCOT

A seven-year-old, 41 kg, intact, cross breed dog, was presented with a history of bilateral hind limb lameness after falling from a height of 1 m. Clinical and radiographic findings were consistent with bilateral patellar tendon rupture. Surgical repair was performed bilaterally. The tendons were sutured primarily, and an internal splint of nylon leader was added. Good apposition of the severed tendon ends had been achieved intraoperatively; however, post operative radiographs showed supra-trochlear displacement of both patellae.

Authors: B. A. Lewis1, D. A. Allen1, T. D. Henrikson2, T. W. Lehenbauer3
Journal: VCOT

In the human and veterinary orthopaedic literature it has been implied that intercondylar notch stenosis is a mechanical factor in cranial cruciate ligament rupture and intraarticular graft failure. The patients in this study were classified as normal (32), unilateral cruciate rupture (23), or bilateral cruciate rupture (17). The dogs were placed under general anaesthesia and both stifles were scanned via computed tomography (CT) as previously described. Three CT slices at predetermined levels were evaluated within the notch.