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Ceramic Applications in Medicine

    Ceramics are becoming increasingly useful to the medical world. Surgeons are using bioceramic materials for repair and replacement of human hips, knees, shoulders, elbows, fingers and wrists. Ceramics also are being used to replace diseased heart valves. Dentists are using ceramics for tooth replacement implants and braces. A new ceramic containing fluorapatite and small particles of glass is being used to replace teeth. This ceramic material has the aesthetic look of a natural tooth and causes less wear to opposing teeth than other available materials. Research is even being done on a "ceramic" based gum which is thought to retard the growth of plaque.
    When used in the human body as implants or even as coatings to metal replacements, ceramic materials can stimulate bone growth, promote tissue formation and provide protection from the immune system. Glass microspheres smaller than a human hair are being used to deliver large, localized amounts of radiation to diseased organs in the body. Ceramics are one of the few materials that are durable and stable enough to withstand the corrosive effect of bodily fluids.
    Ceramics are also being used by surgeons in the form of ceramic coated scissors. The ceramic coating makes the surface hardness four to five times greater than that of stainless steel. The ceramic surface also provides higher sliding capacity to reduce abrasion, and optimizes resistance to rust and corrosion.

(选自http://www.acers.org/)

陶瓷在医学上的应用

    陶瓷在医学行业正得到越来越多的应用。外科医生正采用生物陶瓷材料修复和移植人体髋骨、膝、肩胛、肘、指头以及手腕等。陶瓷也可以用于替换病变的心脏瓣膜。牙科医生将陶瓷用于牙齿的移植和矫形加固。一种新型的含有氟磷酸钙以及玻璃小颗粒的陶瓷正用于替代牙齿,用这种陶瓷制成的牙齿,有着和天然牙齿一样的外表,并且具有比由其他用于制作假牙的材料更好的耐磨性,研究人员也正在研制一种陶瓷基牙龈,以阻碍牙菌班的生长。
    当生物陶瓷材料被用作人体移植物或金属替代物的涂层时,其可以剌激骨骼的生长,促进细胞组织的形成,并保护免疫系统。比人的头发丝还小的微型玻璃小球正被用于向有病变的器官传递大量局部使用的辐射能。陶瓷同时还是少有的几种耐用且具有较高稳定性足以抵抗人体液的腐蚀作用的材料。
    陶瓷也正被用于外科医生使用的陶瓷涂层手术刀的制造,陶瓷涂层可以使手术刀的表面硬度比采用不锈钢时提高4-5倍,而且这种涂层表面更光滑减小了摩损、优化了抵抗生锈和腐蚀的性能。

中国陶瓷信息资源网 黄孝平 译自http://www.acers.org

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发布日: 2003-6-13
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