Knee

Authors: Peter Böttcher, Dr med vet, Diplomate ECVS 1 , Andreas Brühschwein, Dr med vet, Diplomate ECVDI 2 , Philipp Winkels, DVM 1 , Hinnerk Werner, DVM 1 , Eberhard Ludewig, Dr med vet, Diplomate ECVDI 1 , Vera Grevel, Prof Dr med vet, Diplomate ECVS 1 , and Ger
Journal: Veterinary Surgery

ABSTRACT
Objective: To evaluate the sensitivity and specificity of low-field magnetic resonance imaging (lfMRI) for detection of meniscal tears in the canine stifle.
Study Design: Double-blinded prospective clinical study.
Animals: Forty-two consecutive stifles of dogs (≥20 kg; n=34) with clinical and radiologic signs suspicious for cranial cruciate ligament (CCL) insufficiency.

Category: Imaging - Knee
Authors: Campbell CA, Horstman CL, Mason DR, Evans RB.
Journal: JAVMA

OBJECTIVE: To evaluate severity of medial patellar luxation (MPL) and frequency of concomitant cranial cruciate ligament rupture (CCLR) in dogs. DESIGN: Retrospective case series. ANIMALS: 162 dogs (266 stifle joints). PROCEDURES: Medical records of 162 small-breed dogs with MPL were reviewed. Signalment, body weight, luxation grade, bilateral or unilateral MPL, CCLR, and difference in luxation grades between stifle joints were evaluated. Association between severity of MPL and CCLR was investigated. RESULTS: 58 dogs had unilateral MPL, and 104 dogs had bilateral MPL.

Category: Knee
Authors: Bedi A, Feeley BT, Williams RJ 3rd.
Journal: J Bone Joint Surg Am

Articular cartilage has a poor intrinsic capacity for healing. The goal of surgical techniques to repair articular cartilage injuries is to achieve the regeneration of organized hyaline cartilage. Microfracture and other bone marrow stimulation techniques involve penetration of the subchondral plate in order to recruit mesenchymal stem cells into the chondral defect. The formation of a stable clot that fills the lesion is of paramount importance to achieve a successful outcome.

Authors: Yoon JP, Chang CB, Yoo JH, Kim SJ, Choi JY, Choi JA, Seong SC, Kim TK.
Journal: J Bone Joint Surg Am

BACKGROUND: Although several findings on magnetic resonance imaging have been demonstrated after anterior cruciate ligament injury, sequential changes on magnetic resonance imaging have not been comprehensively studied. We undertook to correlate four specific findings on magnetic resonance imaging of an anterior cruciate ligament injury over time.

Authors: Maley JR, Mertens WD, Bahr A.
Journal: VCOT

A twenty-eight-month old female spayed American Bulldog was presented for evaluation of a chronic draining tract and intermittent left hindlimb lameness twenty-eight weeks after a combination tibial plateau levelling osteotomy and cranial closing wedge osteotomy (TLPO/CCWO) had been performed. The patient had developed an infection of the surgical site three weeks postoperatively. Drainage persisted despite implant removal 10 weeks postoperatively and several weeks of culture and sensitivity-directed antibiotic therapy.

Category: Knee
Authors: Palierne S, Palissier F, Raymond-Letron I, Autefage A.
Journal: VCOT

Fracture of the patella associated with bilateral osteochondrosis of the superior pole of the patella in a 14-week-old cat is reported with histological findings. Patellar osteochondrosis has been described in humans, horses, pigs, and dogs and is characterised by incomplete union of the ossification centres related to an abnormal process of endochondral ossification. However this disease has not yet been described in cats. Macroscopically, two main fragments separated by interposed tissue were identified on the left patella.

Category: Knee
Authors: Higgins B, Coughlan A, Pettitt R, Macdonald N, Innes J, Owen M, Comerford E.
Journal: VCOT

The management of tibial tuberosity fracture-avulsion after tibial tuberosity transposition can be challenging. Implants must be able to resist the strong distractive force of the quadriceps mechanism, yet implant size is limited by the amount of tuberosity bone stock available. Revision fixation is compromised further by fragmentation of the tubercle. Five stifle joints had temporary transarticular external skeletal fixators applied to manage complications of tibial tuberosity transposition. Fracture reduction was confirmed in four out of five tibial tuberosity fractures.

Authors: RUTH J. LAMBERT, DVM 1 and KIRK L. WENDELBURG, DVM, Diplomate ACVS 1
Journal: Vet Surg

ABSTRACT
Objective—To assess whether there is a difference in the mechanical medial proximal tibial angle (mMPTA) measured on a tangential caudocranial (tCdCr) radiographic projection versus a straight caudocranial (sCdCr) projection before and after inducing a varus deformity in the proximal tibia.
Study Design—In vitro study.
Sample Population—Cadaveric canine tibiae (n=4 pair).

Category: Deformity - Knee
Authors: MARCOS D. UNIS, DVM, MS 1 , ANN L. JOHNSON, DVM, MS, Diplomate ACVS 1 , DOMINIQUE J. GRIFFON, DVM, MS, PhD, Diplomate ECVS, & ACVS 1 , DAVID J. SCHAEFFER, PhD 1 , GUILLAUME R. RAGETLY, DVM 1 , MELISSA J. HOFFER, DVM 1 , and CHANTAL A. RAGETLY, DVM, MS 1
Journal: Vet Surg

ABSTRACT
Objective—To compare the intra- and interobserver variability occurring when observers with differing experience levels measure tibial plateau angles (TPAs) with a novel digital radiographic projection program (tibial plateau leveling osteotomy [TPLO] planning program), the Kodak Picture Archiving and Communications System (PACS), and standard sized printed films (SF).
Study Design—Cross-sectional study.
Sample Population—Dogs (n=36) with cranial cruciate ligament (CCL) rupture that had a TPLO.

Category: Imaging - Knee
Authors: LYNNE A. SNOW, DVM 1,2,3,4 , RICK WHITE, DVM 1,2,3,4 , SCOTT GUSTAFSON, DVM, MS, Diplomate ACVS 1,2,3,4 , LIN XIE, BS 1,2,3,4 , GISELLE HOSGOOD, BVSc, MS, PhD, Diplomate ACVS 1,2,3,4 , W. TODD MONROE, PhD, PE 1,2,3,4 , JOHN P. CASEY, BS 1,2,3,4 , and MAND
Journal: Vet Surg

ABSTRACT
Objective—To quantify and compare canine stifle stability after 3 stabilization techniques.
Study Design—Randomized controlled study.
Sample Population—Adult canine cadaveric pelvic limbs.

Category: Knee