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首页> 外文会议>13th International Symposium on Ceramics in Medicine and the Annual Meeting of the International Society for Ceramics in Medicine 22-26 November 2000 Bologna, Italy >Biomimetic Deposition of Calcium Phosphate on Thermally Oxidized Titanium and PTFE Substrates
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Biomimetic Deposition of Calcium Phosphate on Thermally Oxidized Titanium and PTFE Substrates

机译：在热氧化钛和PTFE基材上仿生沉积磷酸钙

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摘要

Biomimetic deposition of calcium phosphate (apatite) on Ti substrates air-oxidized at various temperatures was studied after they were soaked in a simulated body fluid (Kokubo solution, SBF), and the deposition behavior of the surface open to SBF (open surface) and the surface facing to the bottom of the container that held SBF and the specimen (contact surface) was compared. The contact surface deposited apatite in 7 days whereas the open surface could not in 2 months. The greatest ability of depositing apatite was provided by oxidation at 400 deg C and 500 deg C. Moreover, apatite deposited on PTFE or silicone plate facing to the 400 deg C-treated Ti substrate with the tapered spacing of 0 to 0.15 mm. The mechanism of the apatite deposition on the contact surfaces was discussed in relation to the passive dissolution of titanium in SBF. The release of titanium hydroxide and OH ions from the titanium surface was considered responsible for the apatite deposition.
机译：研究了将磷酸钙（磷灰石）浸泡在模拟体液（Kokubo溶液，SBF）中后在各种温度下被空气氧化的Ti衬底上的仿生沉积，并研究了表面向SBF（开放表面）开放的沉积行为。比较了保持有SBF的容器的面向底部的表面和试样（接触面）。接触表面在7天内沉积了磷灰石，而开放表面在2个月内没有沉积。磷灰石的最大沉积能力是通过在400摄氏度和500摄氏度的氧化条件下提供的。此外，磷灰石沉积在PTFE或硅树脂板上，面对着经过400摄氏度处理的Ti基材，其锥孔间距为0至0.15毫米。讨论了磷灰石沉积在接触表面上的机理与钛在SBF中的被动溶解有关。认为从钛表面释放氢氧化钛和OH离子是造成磷灰石沉积的原因。

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