Cinemática de equinos hígidos, com laminite crônica ou com claudicação induzida portando diferentes órteses podais

• Ano de defesa: 2019
• Autor(a) principal: Cahuê Francisco Rosa Paz
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais; UFMG
• Palavras-chave em Português: órtese; equinos; laminite; cinemática; Órtese; Laminite; Equino Doenças; Cinemática
• Link de acesso: http://hdl.handle.net/1843/SMOC-BAQHNR

The objective of this study was to identify and record the biomechanical effects, through a kinematic evaluation, promoted by the use of orthoses made with wood (naval plywood), and the association of EVA with wood or EVA with synthetic leather in healthy horses, with chronic laminitis and submitted to a lameness simulation model. Mangalarga Marchador adult horses were used, six healthy mares and six with chronic laminitis. The animals were divided into three groups: sound horses (SH, n = 6), animals with chronic laminitis (CL, n = 6) and induced group (IG, n = 6) (composed of six SH animals, simulation of lameness). The lameness was induced byplacing screws in the dorsal wall of the hoof, through an external threaded metal bush. In a crossover design, all animals underwent four treatments: control (without orthosis), orthosis of EVA + leather (ECOURO), wood rthosis (MAD) and wood orthosis + EVA (MADEVA). After fixation of reflective markers bilaterally in the forelimbs, two-dimensional filming was performed with a frequency of 120 frames per second and the software Tracker 5.0 was used for image digitalization and analysis. The animals were filmed in step on both sides. In order to compare the effect of the treatments, the following kinematic variables were analyzed: stride duration (s), stance phase duration (s), relative stance phase duration (%), breakover duration (s), swing duration stride length (cm), speed (m/s), frequency of stride (stride/sec), dorsal angle of the metacarpal-phalangeal joint and neck angle at moments: heel first contact with ground, midstance, breakover, higher limb elevation and heel second contact with ground. The results found in the control treatment were similar to other kinematic analysis studies, demonstrating theeffectiveness of the methodology used. Also, among the control treatments, statistically significant differences between SH and CL, and between HS and IG were evidenced. In SH, no differences were found between treatments. However, the CL treatment presented differences (P <0.05) in relation to the CL control, whereas in the IG treatment MADEVA showed differences (P <0.05) in relation to the IG control. The results demonstrated that there are differences in the biomechanics of horses with chronic laminitis in relation to sound horses and that quantitatively the orthoses influence the locomotion of these animals. It was also evidenced the possibility of using the laminitis lameness simulation model to perform future biomechanical studies involvingthe evaluation of therapeutic horseshoes or orthoses for the hoof