992 resultados para Teste de push-out


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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Odontologia - FOAR

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Bone morphogenetic proteins (BMPs) have been widely investigated for their clinical use in bone repair and it is known that a suitable carrier matrix to deliver them is essential for optimal bone regeneration within a specific defect site. Fused deposited modeling (FDM) allows for the fabrication of medical grade poly 3-caprolactone/tricalcium phosphate (mPCL–TCP) scaffolds with high reproducibility and tailor designed dimensions. Here we loaded FDM fabricated mPCL–TCP/collagen scaffolds with 5 mg recombinant human (rh)BMP-2 and evaluated bone healing within a rat calvarial critical-sized defect. Using a comprehensive approach, this study assessed the newly regenerated bone employing microcomputed tomography (mCT), histology/histomorphometry, and mechanical assessments. By 15 weeks, mPCL–TCP/collagen/rhBMP-2 defects exhibited complete healing of the calvarium whereas the non- BMP-2-loaded scaffolds showed significant less bone ingrowth, as confirmed by mCT. Histomorphometry revealed significantly increased bone healing amongst the rhBMP-2 groups compared to non-treated scaffolds at 4 and 15 weeks, although the % BV/TV did not indicate complete mineralisation of the entire defect site. Hence, our study confirms that it is important to combine microCt and histomorphometry to be able to study bone regeneration comprehensively in 3D. A significant up-regulation of the osteogenic proteins, type I collagen and osteocalcin, was evident at both time points in rhBMP-2 groups. Although mineral apposition rates at 15 weeks were statistically equivalent amongst treatment groups, microcompression and push-out strengths indicated superior bone quality at 15 weeks for defects treated with mPCL–TCP/collagen/rhBMP-2. Consistently over all modalities, the progression of healing was from empty defect < mPCL–TCP/collagen < mPCL–TCP/collagen/rhBMP-2, providing substantiating data to support the hypothesis that the release of rhBMP-2 from FDM-created mPCL–TCP/collagen scaffolds is a clinically relevant approach to repair and regenerate critically-sized craniofacial bone defects. Crown Copyright 2008 Published by Elsevier Ltd. All rights reserved.

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The study analyses the prevention or endorsing of the crime of infanticide in Finland 1702 1807, rather than the result. Also the impacts of the female body, biology of childbirth and experiences of pregnancy are examined, together with insights from modern medical research. Circumstances are reconstructed by a critical reading of judicial records on all levels of the judicial system. In all 269 cases of infanticide and 142 accessory crimes within the jurisdiction of the Turku court of appeal are studied, with particular focus on exceptionally well recorded cases of 83 accused women and 41 women and men accused of being party to the crime. Secondary sources are medical and jurisprudential writings, the public debate on infanticide, broadsheets and letters asking the King for pardon. Infanticide was considered murder by law. Unmarried women were predetermined as the main culprits. Nevertheless, deliberate infanticides were rare and committed mostly in accomplice. The majority of the infanticides studied were cases where inexperienced and unmarried women accidentally had given birth alone and usually to a dead child. Unaware that the pain they were experiencing was in fact a labour, the accused women instinctively sought solitude to push out the child. Some misunderstood the birth as an urgent need to defecate. The unexpected delivery ended in hiding the baby without remorse. This crime was promoted by several factors in Finnish rural culture, amongst others that also married women hid their pregnancy. The immediate household members did not necessarily know about the childbirth and failed to help the woman. This typical pattern in most cases of infanticide in 18th century Finland is also recorded in modern cases of unknown pregnancies. Fear of accountability prevented witnesses testifying to the actual course of events. The truth remained elusive. With only a few exceptions, the women were sentenced to death or imprisonment. The majority of those accused of accomplice were acquitted. However, too harsh sentences for accidents affected the reporting of the crime. Criminal politics failed to curtail infanticide as the crime was unsatisfactorily addressed by law, society and the judicial system.