SILVIA MARIA AMADO JOAO
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Fisioterapia, Fonoaudiologia e Terapia Ocupacional, Faculdade de Medicina - Docente
LIM/54 - Laboratório de Bacteriologia, Hospital das Clínicas, Faculdade de Medicina
LIM/54 - Laboratório de Bacteriologia, Hospital das Clínicas, Faculdade de Medicina
2 resultados
Resultados de Busca
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- Treatment time of ultrasound therapy interferes with the organization of collagen fibers in rat tendons(2013) FARCIC, Thiago S.; BALDAN, Cristiano S.; CATTAPAN, Carla G.; PARIZOTTO, Nivaldo A.; JOAO, Silvia M. A.; CASAROTTO, Raquel A.BACKGROUND: The application time of therapeutic ultrasound is an infrequently studied dosimetric variable that affects tissue repair. OBJECTIVES: The aim of this study was to evaluate the effects of different treatment times of therapeutic ultrasound (US) on the organization of collagen fibers in the tendons of rats. METHOD: Forty Wistar rats were selected (300±45 g), and the rats were divided into five groups (n=8 for each group): Control, without tenotomy or any treatment; tenotomy group, with tenotomy and without treatment; US groups (US1, US2, and US3), subjected to tenotomy and treated with US for one, two, or three minutes per area of the transducer, respectively. The animals were sacrificed on the 12th post-operative day, and the tendons were surgically removed for analyses of the collagen fiber organization by means of birefringence analysis. RESULTS: The collagen fibers exhibited better aggregation and organization in the US3 group compared with the tenotomy group (p<0.05). CONCLUSIONS: The findings suggest that US applied for three minutes per treated area improves the organization of collagen fibers during rat tendon repair.
- y Relationships between static foot alignment and dynamic plantar loads in runners with acute and chronic stages of plantar fasciitis: a cross-sectional study(2016) RIBEIRO, Ana P.; SACCO, Isabel C. N.; DINATO, Roberto C.; JOAO, Silvia M. A.Background: The risk factors for the development of plantar fasciitis (PF) have been associated with the medial longitudinal arch (MLA), rearfoot alignment and calcaneal overload. However, the relationships between the biomechanical variables have yet to be determined. Objective: The goal of this study was to investigate the relationships between the MLA, rearfoot alignment, and dynamic plantar loads in runners with unilateral PF in acute and chronic phases. Method: Cross-sectional study which thirty-five runners with unilateral PF were evaluated: 20 in the acute phase (with pain) and 15 with previous chronic PF (without pain). The MLA index and rearfoot alignment were calculated using digital images. The contact area, maximum force, peak pressure, and force-time integral over three plantar areas were acquired with Pedar X insoles while running at 12 km/h, and the loading rates were calculated from the vertical forces. Results: The multiple regression analyses indicated that both the force-time integral (R-2=0.15 for acute phase PF; R-2=0.17 for chronic PF) and maximum force (R-2=0.35 for chronic PF) over the forefoot were predicted by an elevated MLA index. The rearfoot valgus alignment predicted the maximum force over the rearfoot in both PF groups: acute (R-2=0.18) and chronic (R-2=0.45). The rearfoot valgus alignment also predicted higher loading rates in the PF groups: acute (R-2=0.19) and chronic (R-2=0.40). Conclusion: The MLA index and the rearfoot alignment were good predictors of plantar loads over the forefoot and rearfoot areas in runners with PF. However, rearfoot valgus was demonstrated to be an important clinical measure, since it was able to predict the maximum force and both loading rates over the rearfoot.