Common Use of Ceramics in Dental and Orthopaedic Applications Essay

Ceramics will be most commonly used in dental applications as regenerative materials pertaining to crowns, cements and dentures.

Some ceramics are used in orthopaedic applications such as bone tissue repair, bone tissue augmentation and joint alternative but their use in this field is less extensive or widespread while metals and polymers mainly because ceramics possess poor break toughness. This kind of severely limitations the use of ceramics in insert bearing applications (Davis, 2003).

Ceramics have high hardness and wear resistance, making them suitable for applications such as the articulating areas in important joints and bone fragments bonding surfaces in implants. Ceramics like alumina and zirconia are more appropriate to use in joint substitutes and dentistry whereas hydroxyapatite or calcium supplements phosphate cements are useful pertaining to bone bonding applications which can be assist with bone growth and implant incorporation with adjacent natural bone and damaged tissues (http://www.azom.com/article.aspx?ArticleID=108).

Alumina and zirconia ceramics have been traditionally used in orthopaedic hip substitutes for the past 30 years. The advantage of employing these was lower use rates than patients observed using polymers and metals. As a result of ionic a genuine and chemical stability of ceramics, they may be relatively biocompatible and therefore even more preferable to make use of than precious metals and polymers. Alumina is most commonly used like a femoral head component rather than metal in a hip the prosthesis because this could reduce the polyethylene wear that may be generated. Alumina is a desired biomaterial to include in hard muscle implants because of characteristics like excellent put on resistance, excessive hardness, bio inert, low abrasion rate and very good frictional behavior. Furthermore, it has excellent surface area finish as well as high tiredness streng...

... stainless steel and Co-Cr metals which results in poor rigidity. Together with this, titanium is a lumination material which will would make it difficult to see below x-ray the image (Hanawa, 2009).

Material alloys and precious metals are as well used to make sure aspects of a cochlear pelerine. The electrode arrays which provide electrical arousal in order to excite neurons built out of platinum since they have very high corrosion level of resistance, good biocompatibility, easier to use than iridium and have low chemical reactivity. On the other hand, metallic alloys just like titanium are used to make the casing for the receiver/stimulator. Titanium is suitable for this application since it is a light materials with large corrosion amount of resistance and solidity and these properties are crucial for the material that is going to be used to make the casing (Stverl and Lenarz, 2009).

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