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人身体是由200多块骨头及相应的关节组成。而骨头不可避兔地可能发生骨折或病变,需要外科医生植入人造材料取代病变的骨头或关节。根据生物力学和生物化学相容性的要求,植入材料应具备下述特点:(1)具有一定强度,能承受重力、抗疲劳、耐磨损;(2)具有适当的弹性模量,与所替代的部分有相似的物理和机械性能;(3)在体内不被腐蚀;(4)不引起毒性反应,不致癌、不过敏;(5)对组织无刺激,不引起炎症,不形成脓肿或成为未来感染的发源地。根据上述要求,临床上常用的植入材料有金属(不锈钢、钴基合金、钛及其合金)及陶瓷材料。金属植入材料在体内容易出现腐蚀、磨
The body is composed of more than 200 bones and corresponding joints. Bone inevitably fractures or lesions may require surgery to implant artificial material to replace the lesion bones or joints. According to biomechanical and biochemical compatibility requirements, the implant material should have the following characteristics: (1) has a certain strength, can withstand gravity, fatigue, wear resistance; (2) with the appropriate elastic modulus, and The replacement part has similar physical and mechanical properties; (3) in the body is not corrosive; (4) does not cause toxic reactions, carcinogenic, non-allergic; (5) no stimulation of the organization, does not cause inflammation, does not form abscesses Or become the birthplace of future infections. According to the above requirements, commonly used in clinical implant materials are metal (stainless steel, cobalt-based alloys, titanium and alloys) and ceramic materials. Metal implant material prone to corrosion in the body, grinding