Unknown

5251 WordsNov 15, 201222 Pages
Definition of biometals A group of chemical elements that are needed in minute quantities for the proper growth, development, and physiology of an organism. The term Biometal refers to the role of metal ions in biology, biochemistry and medicine. The metals copper, zinc, iron and manganese are examples of metals that are essential for the normal functioning of the body. It is also a term used to describe a living machine. Definition of bioceramics An advanced ceramic used to create components suitable for use or replacement in the human body. Biocompatible or osteoinductive (stimulating bone growth) ceramic material, such as hydroxyapatite or some other type of calcium phosphate ceramic, used for reconstructive bone surgery and…show more content…
"In the short term, the recovery time is likely longer than it would be with a cemented implant. However, the non-cemented fixation normally lasts longer because it relies on bone ingrowth. HA relies on the strength of the cement to keep the implant in place." If an implant manufacturer opts for a titanium-based coating, it can choose between one that is pure titanium and an alloy that contains 6 percent aluminum and 4 percent vanadium, called Ti-6AI-4V, McCracken said. "Both are engineered to spur bone ingrowth," he said. "The Ti-6AI-4V has higher strength than pure titanium but does cost more. The market is about 50-50. Both go back a long way. Which gets used often depends on which material the orthopedics company started with, which was grandfathered in. Companies generally don't change those kinds of preferences." New technologies are being developed that will do an even better job at promoting bone ingrowth, McCracken added. This in turn is prompting firms such as Reading Alloys to develop new powders that are more compatible with these processes. "Several medical companies are developing new porous coatings for implants that promote and increase bone ingrowth and reduce bone shielding effects by the use of titanium-based foams or scaffolds," he explained. "Today's technology works by plasmaspraying the powder onto the implant.
Open Document