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Foi analisado o efeito da laserterapia com emissao do raio laser arsenieto de galio na reparacao tendinea de equinos apos inducao de tendinite experimental. Foram utilizados 10 equinos, SRD, com idade media de 2 a 5 anos, selecionados quanto a normalidade do aparelho locomotor. A tendinite foi induzida pela injecao de colagenase C1639 Tipo I-S na concentracao de 2,5 mg/ml na dose de 0,5 ml nos tendoes flexores superficiais de ambos os membros anteriores. Apos 48 horas da injecao da colagenase, foram realizados exames ultra-sonograficos consecutivos com intervalos de 24 horas, para avaliacao das alteracoes ocorridas no tendao e instituido a laser terapia diaria por 15 dias com emissao local do raio laser Arsenieto de Gallium na dose de 8 joules/cm² no membro anterior esquerdo, permanecendo o contra-lateral (direito) como controle. No 40o dia de avaliacao ultra-sonografica realizou-se biopsia na regiao da lesao para exames histologicos. Os exames ultrasonografico e histologico nao demonstraram diferencas entre os membros tratados e os membros controle. Esses resultados demonstraram que o raio laser Arsenieto de Gallium na dosimetria de 8 joules/cm² nao interferiu de forma significativa no processo de reparacao tendinea. Effects of laser therapy on experimental tendinitis in horses: ultrasonographic and histologic study Abstract Ultrasonography is being used very successfully for the evaluation of equine soft tissues, improving the diagnosis and monitoring soft tissue musculskeletal injury accurately and noninvasively. The superficial digital flexor tendon is by far the most frequently involved tendon in sport horse injury, being this way, highly adequate for ultrasonographic characterization and healing. Colagenase was injected bilaterally in the superficial digital flexor tendon, at the medium third metacarpus in ten horses. Ultrasonography was performed 24 hours later in order to study the effect if this inflammatory agent on the tendon ultrasongraphy was performed using a real time ultrasound with 7.5 MHz transducer. According to GENOVESE et al. (1986) classification, types II and III injuries were observed. One limb of each horse was treated with soft laser daily for 15 consecutive days using 8 joules/cm. The opposite limb was used as control. Ultrasonography was performed every 48 hours for 40 days showing no difference in the healing between treated and untreated limbs. No significant differences were observed between the histological aspects of the superficial digital flexor tendon healing and the ultrasonographic images. It was possible then to conclude that laser therapy did not interfere in the tendon healing.

EFEITO DA LASERTERAPIA EM TENDINITE EXPERIMENTAL NO TENDÃO FLEXOR DIGITAL SUPERFICIAL EM EQÜINOS: ESTUDO HISTOLÓGICO E ULTRA-SONOGRÁFICO