Uso da termografia para avaliação da resposta tecidual após implante de polímero a base de poliuretana de mamona em osso III metacarpiano de equinos
Nóbrega, Fernanda SilveiraFerreira, Márcio PolettoFacó, Lara LopesSelim, Mariana BaroniDe Zoppa, André Luís do Valle
Background: Thermography is a diagnostic imaging modality employed to estimate the degree of activity of some bodytissues. In theory, thermography would be expected to provide a graphical representation of inflammation and could therefore be used for early detection and monitoring of the inflammatory process. Given increased local temperature is one ofthe cardinal signs of inflammation, thermography could be an invaluable diagnostic method for musculoskeletal inflammatory conditions. The aim of this study was to investigate the ability of thermography to detect inflammation followingimplantation of ricin polyurethane polymer into experimental third metacarpal bone defects in horses.Materials, Methods & Results: A bone defect was produced in the proximal third of the metacarpal bone in 6 horses.Clinical examination of all horses was performed prior to surgery (control assessment; D0). A bone defect measuring13 mm in diameter was created in the proximal aspect of the left and right third metacarpal bones using a trephine saw.Bone defects in each horse were either filled with ricin polyurethane polymer and calcium carbonate (polymer limb) orleft untreated (control limb). Thermographic images were acquired 7, 15, 30, 60, 90 and 120 days following surgery. Athermal camera (Thermacam T400®) with 0.05°C thermal sensitivity was employed for infrared thermal image acquisitionand Rainbow High Contrast palette was selected. The distance between the camera and the subjects was adjusted so thatall images included the front limb from carpus to toe. Bandages were removed 30 min before data collection. Followingdemarcation of the proximal third metacarpal area on thermographic images, temperature readings were performed using built-in software and compared between polymer and control limbs. Mean temperatures were used in the analysis forincreased reliability. The Freidman test was employed to assess the progression of the variables studied along the experimental...(AU)
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