Análise do risco de fratura óssea por ultrasonometria e ensaio mecânico de compressão / Analysis of bone fracture risk using ultrasonometry and mechanical compression essays

AUTOR(ES)

Maria Elizete de Souza Rodrigues

DATA DE PUBLICAÇÃO

2004

RESUMO

Osteoporosis is a disease that affects bone tissue and is characterized by a decrease in its mass and deterioration of its architeture. The current method used in osteoporosis diagnostic is bone densitometry (DEXA- Dual Energy X-ray Absorption), which utilizes ionizing radiation. Various studies have been published discussing alternatives or complimentary techniques to bone densitometry. One of these techniques is quantitative untrasound (QUS), which is based on the analysis of ultrasound spread through bone tissue to assess its quality. The objective of this work is to add more data to the discussion of this technique as an alternative to bone densitometry. Correlation studies between data from experiments in trabecular bones from the calcaneus of human cadavers have been performed using the quantitative ultrasound equipment SONOST-2000 (Vicmed/OsteoSys-Medison) and mechanical compression essays. Scanning Electron Microscopy was also used as an aid to identify modifications in the samples microarchiteture from health and osteopenic tissue. The results indicate that BQI (Bone Quality Index ) can be used as indirect method to obtain important parameters used in the assessment of fracture risk, such as the maximum load supported by the material.

ASSUNTO(S)

mechanical properties fracture risk osteoporosis quantitative ultrasound risco de fratura trabecular bone osso trabecular ultrasonometria osteoporose propriedades mecânicas

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