Senior Science
senior science | Medical technologies | Study notes | || 5/10/2013 |
[Type the abstract of the document here. The abstract is typically a short summary of the contents of the document. Type the abstract of the document here. The abstract is typically a short summary of the contents of the document.] |
identify parts of the body and the biomaterials and biomedical devices that can be used to replace damaged or diseased body parts including: * pins, screws and plates * artificial joints * pacemakers * artificial valves * crowns, dentures * lenses * prosthetic limbs * cochlear implants
Pins, screws and plates * These are used to repair bone fractures. They are almost all made from metallic alloys. * The pin is a versatile implant used for the fixation of bone fragments and is used when the fracture is in a place where it is difficult to use a plate. * Pins are also used when it is difficult to obtain adequate stability of the bone fracture by any other means. * Screws are some of the most widely used devices for repairing fractures. They are used to fix bone plates to bones. * Bone plates are also used to repair bone fractures. They are designed to be very strong and absorb the large stress forces generated when the bone moves. * It is also important that the bone plate be fixed to the bone with the use of screws.
Artificial joints * These replace joints that have been largely destroyed by degenerative diseases such as arthritis or damaged badly in an accident. * Common examples are knee, hip and shoulder joints; the latter two are ball and socket type joints [more information on ball and socket joints is provided in 9.3 Medical Technology - Bionics, subsection 3]. * Artificial hip joints are often made from a stainless steel-polyethylene or cobalt-chromium alloy-polyethylene combination. Other materials that can be used are: * titanium * titanium-aluminium-vanadium
[Type the abstract of the document here. The abstract is typically a short summary of the contents of the document. Type the abstract of the document here. The abstract is typically a short summary of the contents of the document.] |
identify parts of the body and the biomaterials and biomedical devices that can be used to replace damaged or diseased body parts including: * pins, screws and plates * artificial joints * pacemakers * artificial valves * crowns, dentures * lenses * prosthetic limbs * cochlear implants
Pins, screws and plates * These are used to repair bone fractures. They are almost all made from metallic alloys. * The pin is a versatile implant used for the fixation of bone fragments and is used when the fracture is in a place where it is difficult to use a plate. * Pins are also used when it is difficult to obtain adequate stability of the bone fracture by any other means. * Screws are some of the most widely used devices for repairing fractures. They are used to fix bone plates to bones. * Bone plates are also used to repair bone fractures. They are designed to be very strong and absorb the large stress forces generated when the bone moves. * It is also important that the bone plate be fixed to the bone with the use of screws.
Artificial joints * These replace joints that have been largely destroyed by degenerative diseases such as arthritis or damaged badly in an accident. * Common examples are knee, hip and shoulder joints; the latter two are ball and socket type joints [more information on ball and socket joints is provided in 9.3 Medical Technology - Bionics, subsection 3]. * Artificial hip joints are often made from a stainless steel-polyethylene or cobalt-chromium alloy-polyethylene combination. Other materials that can be used are: * titanium * titanium-aluminium-vanadium