Checa Antonio Gerardo, Rodríguez-Navarro Alejandro B, Esteban-Delgado Fransico J
Departamento de Estratigrafía y Paleontología, Facultad de Ciencias, Universidad de Granada, Avenida Fuentenueva s/n, 18071 Granada, Spain.
Biomaterials. 2005 Nov;26(32):6404-14. doi: 10.1016/j.biomaterials.2005.04.016.
The calcitic columnar prismatic (CCP) microstructure constitutes the external shell layer of pterioid and ostreoid bivalves. It consists of calcite monocrystals, which extend perpendicular to the growth surface and are surrounded by thick interprismatic membranes (<1-8 microm). The exceptional biomechanical properties of CCP layers make them interesting for biomechanical-biomimetic studies. Their potential as biomedical implants still requires further testing. Previous studies attributed the mineral phase a crucial role in the organization of the microstructure. Conversely, our observations on the morphology of prisms and abnormally calcified shells reveal that the organic web may form in the absence of the mineral infilling and that the boundaries between prismatic units are shaped by interfacial tension. Accordingly, we consider interprismatic organic membranes as the main shaping agent. We propose that the prismatic layer initiates as an emulsion formed by the fluid precursor of organic membranes and the extrapallial fluid, which causes formation of empty organic cavities. Prismatic crystals began to form within the organic cavities a little later, but their secretion surface soon levelled that of organic membranes.
方解石柱状棱柱形（CCP）微结构构成了翼形和牡蛎形双壳类动物的外壳层。它由方解石单晶组成，这些单晶垂直于生长表面延伸，并被厚厚的棱柱间膜（<1 - 8微米）包围。CCP层卓越的生物力学性能使其成为生物力学仿生研究的有趣对象。它们作为生物医学植入物的潜力仍需进一步测试。先前的研究认为矿物相在微结构的组织中起关键作用。相反，我们对棱柱形态和异常钙化壳的观察表明，在没有矿物填充的情况下有机网络可能形成，并且棱柱单元之间的边界是由界面张力塑造的。因此，我们认为棱柱间有机膜是主要的塑造剂。我们提出棱柱层最初是由有机膜的流体前体和外套膜外液形成的乳液，这导致形成空的有机腔。棱柱晶体稍后在有机腔内开始形成，但其分泌表面很快与有机膜的表面齐平。
