OBJECTIVES: To evaluate morphological parameters of the femur, tibia, and patella in Toy Poodles with medial patellar luxation (MPL) using three-dimensional (3D) computed tomography (CT) and to compare these parameters between radiography and CT.

Category: Deformity - Imaging - Knee

An approximately three-month-old, 0.45 kg female Domestic Shorthaired kitten with stiff hyperextended hindlimbs distal to the talo-central joint is reported. Attempts at repositioning of the joints by flexion failed while increased manipulative forces caused signs of pain and vocalization. Orthogonal radiographic views revealed a significant malarticulation of the tarsus. Goniometric measurments revealed a 145° extensor and 95° internal torsional deformity. 

OBJECTIVE:  To evaluate the influence of epidemiologic, surgical, and mechanical factors on the durations of bone consolidation and external fixation after distraction osteogenesis in dogs.

STUDY DESIGN: Retrospective cohort study.

OBJECTIVES: (1) To describe a protocol for measurement of the anatomic lateral distal femoralangle (aLDFA), angle of anteversion (AA), mechanical medial proximal tibial angle (mMPTA), tibialtuberosity displacement (TTD), and crural torsion angle (CTA) from computed tomography (CT) multiplanar reconstructions of canine hindlimbs. (2) To test the intra-observer variability (repeatability) and inter-observer variability (reproducibility) of the protocol.

Category: Deformity - Imaging - Knee
Authors: Gutierrez-Quintana R1, Guevar J, Stalin C, Faller K, Yeamans C, Penderis J.
Journal: Vet Radiol Ultrasound

Congenital vertebral malformations are common in brachycephalic "screw-tailed" dog breeds such as French bulldogs, English bulldogs, Boston terriers, and pugs. The aim of this retrospective study was to determine whether a radiographic classification scheme developed for use in humans would be feasible for use in these dog breeds.

Category: Deformity - Spine
Authors: Demianiuk RM1, Guiot LP.
Journal: J Small Anim Pract

A 4 · 5-month-old, 13 · 8 kg, female neutered mixed breed dog was presented for evaluation of acute non-weight bearing right pelvic limb lameness. Radiographs revealed a tibial tuberosity avulsion fracture for which open reduction/internal fixation was performed. Asymmetrical premature closure of the cranial aspect of the proximal tibial physis ensued with a tibial plateau angle of -12°. Abnormal stifle biomechanics resulted in lameness and caudal cruciate ligament fraying.

Authors: Deruddere KJ1, Snelling SR.
Journal: N Z Vet J


The aim of this study was to report the outcome of acute antebrachial angular and rotational limb deformity (AARLD) correction using a standard radial ostectomy, an unarticulated type 1b external skeletal fixator (ESF) and intra-operative alignment with no pre-operative planning.


Authors: Aiken M1, Barnes D.
Journal: J Small Anim Pract


To assess whether the bisection of the fabellae by their respective femoral cortices is a useful criterion for assessing positioning of craniocaudal pelvic limb radiographs, and whether this is consistent in limbs affected or unaffected by medial patella luxation.


Computed tomography multi-planar reconstructions were used to determine the relative positions of the fabellae with respect to the femoral cortices.


Authors: Goodrich ZJ1, Norby B, Eichelberger BM, Friedeck WO, Callis HN, Hulse DA, Kerwin SC, Fox DB, Saunders WB.
Journal: Vet Surg


To report thoracic limb alignment values in healthy dogs; to determine if limb alignment values are significantly different when obtained from standing versus recumbent radiographic projections.


Prospective cross-sectional study.


Labrador Retrievers (n = 45) >15 months of age.


Authors: Vallefuoco R1, Manassero M, Leperlier D, Scotti S, Viateau V, Moissonnier P.
Journal: Vet Comp Orthop Traumatol

Objective: To report our clinical experience in the surgical treatment of feline thoraco-lumbar vertebral fracture-luxations using optimal safe implantation corridors as previously described in vitro. Study design: Retrospective clinical study. Materials and Methods: Medical records and radiographs of cats with vertebral fracture-luxations stabilized by screws and polymethylmethacrylate (PMMA) using optimal safe implantation corridors between 2009 and 2011 were reviewed.