Morgan line and its relationship with distraction index, angle of inclination and degenerative joint disease in the diagnosis of canine hip dysplasia

Abstract

RESUMO Avaliaram-se 160 radiografias das articulações coxofemorais de 40 cães de diferentes raças de grande porte, provenientes de Belo Horizonte, Brasil. As radiografias de cada animal foram obtidas em dois momentos: um (média de 7,23 meses de idade) e dois (média de 14,25 meses). Utilizaram-se o método radiográfico convencional (MRC) e o método radiográfico em distração (MRD), ambos realizados nos dois momentos. No MRC, mensurou-se o ângulo de Norberg (AN), o ângulo de inclinação (AI) e avaliouse a presença de doença articular degenerativa (DAD). O MRD foi realizado para se estabelecer o índice de distração (ID). Os objetivos foram avaliar a presença da linha Morgan (LM) e de outros sinais de DAD, correlacionando-os com o grau de displasia coxofemoral (DCF); além de se verificar se o ID maior que 0,3 (primeiro momento) possui associação com a presença de LM (segundo momento

Features of the Femoral Proximocaudal Joint Capsule Insertion Among Canids

“…Our data set was derived from a large screened group of dry bone specimens that reflected low prevalence of remnant joint capsule insertion enthesophytes. Nonetheless, the data clarify the anatomic association of the capsule insertion and CCO that previously has been inferred, mostly from imaging (Mayhew et al, 2002;Powers et al, 2004;Risler et al, 2009;Kishimoto et al, 2010;Karbe et al, 2012;Miranda et al, 2016;Sarierler and Bellek, 2017) or by occasional visual anatomic assessment (Morgan, 1987;Pyszkova et al, 2017).…”

“…DI is a method to measure lateral distraction of the femoral head from the acetabulum of the dog, with greater numerical magnitude predicting laxity (CHD) and OA in that joint. Miranda et al () examined coxofemoral joint radiographs of 40 large breed dogs, using both standard and distraction projections. The authors concluded that the various radiographic indicators for coxofemoral joint disease should include radiographic CCO, reported as present or absent.…”

Developmental features of the canid proximocaudal femur

“…Additional contributions from entheses at the dorsocaudal insertion of the joint capsule also are possible, but histological study of bonesoft tissue specimens is needed for clarification. Haines (1975) included several specimens from dogs in a histological study of human physeal closure but not at a level of detail that would further inform recent similar studies (Miranda et al, 2016;Pyszkova et al, 2017) of dogs. Indeed, prospective specimen availability for postmortem examination and new detailed histological studies likely will remain limited, for contemporary societal reasons.…”