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首页> 外文期刊>ScienceAsia: journal of the Science Society of Thailand >Investigation of the mechanical and in vitro biologicalproperties of ordinary and white Portland cements
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Investigation of the mechanical and in vitro biologicalproperties of ordinary and white Portland cements

机译：普通和白色硅酸盐水泥的力学和体外生物学性能研究

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摘要

Biomaterials containing calcium silicate have been widely used in dental and bone repaired applications.This study investigated mechanical and in vitro biological properties of ordinary and white Portland cement both of whichare composed mainly of calcium silicates. The time of setting was determined using a Vicat needle. Compressive strengthwas measured at the age of 1, 3, and 7 days. The 1 day set Portland cement pastes were soaked in a simulated body fluid toinvestigate the ability of the material to form a bond with living bone tissue. X-ray diffraction traces of samples followingimmersion in simulated body fluid demonstrated that both cement pastes form a hydroxyapatite layer within 7 days butwhite Portland cement shows a noticeably higher amount of apatite crystal than that of ordinary Portland cement. Scanningelectron micrographs reveal a clear presence of hydroxyapatite on the surface of white, but not in ordinary Portland cement.In addition, white Portland cement can achieve a compressive strength of 30 MPa within 24 h after curing in distilled waterat human temperature.
机译：含硅酸钙的生物材料已被广泛用于牙科和骨骼修复应用中。本研究调查了普通和白色波特兰水泥的力学和体外生物学性能，这两种水泥均主要由硅酸钙组成。使用维卡针测定凝固时间。在1、3和7天的年龄测量抗压强度。将1天凝固的波特兰水泥浆浸泡在模拟的体液中，以研究该材料与活骨组织形成结合的能力。样品浸入模拟体液后的X射线衍射迹线表明，两种水泥浆均在7天之内形成了羟基磷灰石层，但是白色硅酸盐水泥显示出的磷灰石含量明显高于普通硅酸盐水泥。扫描电子显微镜照片显示白色表面明显存在羟磷灰石，而普通硅酸盐水泥中不存在。此外，白色硅酸盐水泥在常温蒸馏水中固化后24小时内可达到30 MPa的抗压强度。

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