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首页> 外文会议>Advances in bioceramics and porous ceramics V >CARBONATE APATITE FORMATION DURING THE SETTING REACTION OF APATITE CEMENT
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CARBONATE APATITE FORMATION DURING THE SETTING REACTION OF APATITE CEMENT

机译：磷灰石水泥凝固反应过程中的碳酸盐磷灰石形成

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摘要

Replacement of apatite cement (AC) to bone is still controversial issue. To understand factor that could affect the replacement of AC to bone, AC consisting of an equimolar mixture of tetracalcium phosphate (TTCP; Ca_4(PO_4)O) and dicalcium phosphate anhydrous (DCPA; CaHPO_4) was allowed to set at 37℃ and 100% relative humidity under 5% CO_2 or N_2. Carbonate apatite (CO_3AP) was formed when AC was allowed to set under 5% CO_2. The amount of CO_3 decreased gradually as the depth from the surface increased. The CO_3AP was the B-type CO_3AP in which CO_3~(2-) was replaced with PO_4~(3-) and the CO_3AP found in bone. Larger amount of TTCP remain unreacted when the AC was allowed to set under N_2 whereas smaller amount of TTCP remain unreacted when the AC was allowed to set under CO_2. This may be caused by the larger Ca/P molar ratio of CO_3AP. Formation of CO_3AP and/or small unreacted TTCP are thought to be key factors for the replacement of AC to bone.
机译：将磷灰石胶结剂（AC）替代至骨骼仍然是有争议的问题。为了了解可能影响AC替代骨骼的因素，将由等摩尔的磷酸四钙（TTCP; Ca_4（PO_4）O）和无水磷酸二钙（DCPA; CaHPO_4）组成的AC设定在37℃和100％相对湿度低于5％CO_2或N_2。当将AC设置在5％CO_2以下时，形成了碳酸盐磷灰石（CO_3AP）。随着从表面的深度增加，CO_3的量逐渐减少。 CO_3AP是B型CO_3AP，其中CO_3〜（2-）被PO_4〜（3-）代替，并且在骨骼中发现了CO_3AP。当允许将AC设置在N_2下时，较大的TTCP保持未反应，而当允许将AC设置在CO_2下时，较小的TTCP保持未反应。这可能是由于CO_3AP的Ca / P摩尔比较大所致。 CO_3AP和/或小的未反应的TTCP的形成被认为是将AC替换为骨的关键因素。

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  • 会议地点 Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US);Daytona Beach FL(US)
  • 作者

    Arief Cahyanto; Kanji Tsuru; Kunio Ishikawa;

  • 作者单位

    Department of Biomaterials, Faculty of Dental Science, Kyushu University, Fukuoka, JAPAN;

    Department of Biomaterials, Faculty of Dental Science, Kyushu University, Fukuoka, JAPAN;

    Department of Biomaterials, Faculty of Dental Science, Kyushu University, Fukuoka, JAPAN;

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