Percorrer por autor "Fernandes, Maria"
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- Additive manufacturing in the development of an intramedullary nail: study of clinical casePublication . Fernandes, Maria; Lino, Jorge; Fonseca, E.M.M.The additive manufacturing is currently an indispensable tool m different áreas. Its application in orthopaedic área hás been essential in the development of surgical procedures, visualization of anatomical stmctures and especially in the new implants design to improve the conditions for patients' treatment. The present study considered different techniques of additive manufacturing applied in design, diagnosis and planning of a locked intramedullary nail used in the femoral diaphysis fractures (type A). This study was complemented with the follow-up of a surgery case to the femoral diaphysis fracture. It was performed a biomechanical analysis using the fínite element method and 3D models through a printing in íüll colour, allowing to obtain the colour leveis related to von Mises stresses. AU the studied techniques have proved to be important, since they allow a three-dimensional view of real dimensions of the implant by helping health professionals to do a more accurate and safe surgical planning.
- Additive manufacturing in the development of an intramedullary nail: study of clinical casePublication . Fernandes, Maria; Lino, Jorge; Fonseca, E.M.M.The additive manufacturing is currently an indispensable tool in different areas. Its application in orthopaedic area has been essential in the development of surgical procedures, visualization of anatomical structures and especially in the new implants design to improve the conditions for patients’ treatment. The present study considered different techniques of additive manufacturing applied in design, diagnosis and planning of a locked intramedullary nail used in the femoral diaphysis fractures (type A). This study was complemented with the follow-up of a surgery case to the femoral diaphysis fracture. It was performed a biomechanical analysis using the finite element method and 3D models through a printing in full colour, allowing to obtain the colour levels related to von Mises stresses. All the studied techniques have proved to be important, since they allow a three-dimensional view of real dimensions of the implant by helping health professionals to do a more accurate and safe surgical planning.
- Analyis of stresses in drilled composite materialsPublication . Fernandes, Maria; Natal, Renato; Fonseca, E.M.M.In medicine there are many surgical procedures that involve the bone tissue, often entail cutting, drilling or screwing operations of the bone. The success of these surgeries depends on many factors and the bone damage degree generated during the drilling. The cutting effort achieved during the drilling process is one of the problems and is directly related with the drilling parameters. It is essential to understand and to improve the cutting conditions to minimize the bone damage.
- Composite materials and bovine cortical bone drilling: thermal experimental analysisPublication . Fernandes, Maria; Fonseca, E.M.M.; Natal, Renato; Vaz, M.A.P.; Dias, Maria Isabel RibeiroThe boné drilling is a common procedure in orthopaedic surgery, mainly in the treatment of fractures and reconstmctive surgery. The success of this surgeries is dependent of many factors and also in heat generation control during the drilling boné. The main concem in boné drilling are the mechanical and thermal damage of the boné induced by inappropriate parameters such as drill speed and feed-rate during surgical procedures. This paper studies the problem ofgeneration heat in drilling process ofcomposite materiais, with similar mechanical properties to the human boné, and in bovine cortical boné. The main goal was study the evolution of temperature through the different experimental methodologies using different drilling parameters. It was concluded when the drill speed and feed-rate are higher the boné temperature increase is lower. The results of temperature in the drilling process of composite material or bovine boné were compared and were found a good agreement with both.
- Composite materials and bovine cortical bone drilling: thermal experimental analysisPublication . Fernandes, Maria; Fonseca, E.M.M.; Natal, Renato; Vaz, M.A.P.; Dias, Maria Isabel RibeiroThe bone drilling is common in orthopaedic surgery. The success of this surgery is dependent on many factors, namely on the heat generation control during the bone drilling. The main concern in bone drilling is the mechanical and thermal damage induced by inappropriate parameters, as drill speed and feed-rate.
- Composite materials and bovine cortical bone drilling: thermal experimental analysisPublication . Fernandes, Maria; Fonseca, E.M.M.; Natal, Renato; Vaz, M.A.P.; Dias, Maria Isabel RibeiroThe bone drilling is a common procedure in orthopaedic surgery, mainly in the treatment of fractures and reconstructive surgery. The success of this surgeries is dependent of many factors and also in heat generation control during the drilling bone. The main concern in bone drilling are the mechanical and thermal damage of the bone induced by inappropriate parameters such as drill speed and feed-rate during surgical procedures. This paper studies the problem of generation heat in drilling process of composite materials, with similar mechanical properties to the human bone, and in bovine cortical bone. The main goal was study the evolution of temperature through the different experimental methodologies using different drilling parameters. It was concluded when the drill speed and feed-rate are higher the bone temperature increase is lower. The results of temperature in the drilling process of composite material or bovine bone were compared and were found a good agreement with both.
- Temperature assessment in the drilling of composite materials and ex-vivo porcine bonesPublication . Fernandes, Maria; Fonseca, E.M.M.; Natal, Renato; Dias, Maria Isabel RibeiroThe bone cutting is a procedure widely used in medicine, including orthopaedic, dental and neuro surgeries. The success of this surgeries is dependent of many factors and also in temperature generation during the drilling bone. When an excessive heat is produced during the drilling bone the thermal necrosis can occur, and the bone suffers injuries.(...)
- Temperature assessment in the drilling of ex vivo bovine and porcine cortical bone tissuePublication . Fernandes, Maria; Fonseca, E.M.M.; Natal, Renato; Dias, Maria Isabel RibeiroThe drilling bone process is a common surgical procedure on medicine. The main concern in these surgeries is the thermal damage of the bone tissue induced by inappropriate parameters [1]. Objectives: Analyze the optimum cutting conditions that generate the lower temperature. Drill speed and the feed-rate effects were studied during the drilling of animal bones. Experimental tests were performed in laboratory and clinical environment.