Luxation/Subluxation

Authors: Tom Ichinohe, Yukihiro Fujita

A 10-week-old Yorkshire terrier had lameness of the right forelimb with complete lateral radioulnar luxation at the humerus, consistent with Type III congenital elbow luxation; this is rarely treated in the presence of multiple skeletal deformities. Lateral subluxation of the radial head at the left elbow was diagnosed as Type I congenital elbow luxation. Procurvatum, distal valgus, and external torsion were present in both antebrachiae.

Authors: Parisa Mazdarani, James Edward Miles

Objective: The aim of this study was to identify the ideal anchor point for patellar anti-rotational sutures for adjunctive stabilization of medial patellar luxation in both small and large breed dogs.

Authors: Thomas Elie Giansetto, Emilie Pierrot, Pierre P Picavet, Michael Lefebvre, Albane Rives, Frédéric Farnir, Stéphanie Claeys, Marc Balligand

Objective: The aim of this study was to test the low sensitivity of the Allberg and Miles index to the stifle opening angle, evaluate the displacement of the patella after a Modified Maquet Technique using this index and assess the incidence of patellar luxation post-Modified Maquet Technique in dogs.

Authors: Ashley S Villatoro, Anke Langenbach, Jin Yoon, Tanya C Garcia, Denis J Marcellin-Little

This retrospective observational study aimed to characterize the severity and distribution of OA in the stifle joints of small and medium dogs with CCL injury and/or MPL.

Radiographs of the stifle joints from 218 dogs from 10 small and medium breeds were included; 127 joints had CCL injury, 76 joints had MPL, and 73 joints had CCL injury and MPL. OA was graded at 33 sites within the joint.

Authors: Federico Longo, Parastoo Memarian, Sebastian Christoph Knell, Barbara Contiero, Antonio Pozzi

Objectives: To determine cutoff values in small (SB) and medium/large (MLB) breed dogs with and without medial patellar luxation (MPL) for identifying abnormal femoral trochlea morphology.

Study design: Original research.

Authors: Andrew James Carey Beer, Sorrel Langley-Hobbs, Alex Belch

Objectives: Medial patellar luxation (MPL) is the most common developmental cause of hindlimb lameness in cats. The association between femoral and tibial conformation and MPL measured on computed tomography (CT) has not been reported in cats. The aims were to report femoral and tibial conformation in cats with and without MPL and to report normal femoral and tibial angles.

Authors: Julien Letesson, Bastien Goin, Eric Viguier, Thibaut Cachon

Objectives: The aim of our study was to describe a biomechanical testing protocol to reproduce ex vivo craniodorsal hip luxation specific to the feline model, and evaluate the biomechanical properties of an intact hip joint compared with the fixation strength of two different techniques of extra-articular hip stabilisation.

Authors: Rachel E Rivenburg, Sean M Murphy, Ciaran T Jones, Kyle W Martin

Objective: The aim of this study was to describe an arthroscopic-assisted technique for coxofemoral toggle rod placement, and to report on the feasibility, drill tunnel trajectory and accuracy of tunnel aperture location using this method.

Study design: Cadaveric pilot study.

Sample population: Eight coxofemoral joints.

Authors: Akari Sasaki, Yuki Hidaka, Manabu Mochizuki, Muneki Honnami

Trochleoplasty is often performed in dogs with medial patellar luxation (MPL); however, the current guidelines on when to perform a trochleoplasty in dogs are vague. The sulcus angle (SA) is used to assess the femoral trochlear morphology in humans.

The aim of this study is to describe a method to measure the SA and other parameters of trochlea morphology in dogs using computed tomography.

Authors: Sebastian Prior, Francisco Silveira, Lida Pappa, Pablo Pérez López, Robert Quinn, Darren Barnes

Background: This study aimed to determine whether Blumensaat's line, a consistently present radiographic feature delineating the peak of the femoral intercondylar fossa, could be used to assess for cranial tibial subluxation in canine stifles with cranial cruciate ligament disease.