Microct and Preparation of Ss-TCP Granular Material by the Polyurethane Foam Method

Abstract

Commercial ß-tricalcium phosphate (ß-TCP) is commercialy available in granules manufactured by sintering of powders. We have evaluated the different steps of the manufacturing process of ß-TCP ceramics granules prepared from blocks obtained with the polyurethane foam technology. Three types of slurry were prepared with 10, 15 and 25 g of ß-TCP per gram of polyurethane foam. Analysis was done by scanning electron microscopy, EDX, Raman spectroscopy and microcomputed tomography combined with image analysis. A special algorithm was used to identify the internal microporosity (created by the calcination of the foam) from the internal macroporosity due to the spatial repartition of the material. The low ß-TCP dosages readily infiltrated the foam and the slurry was deposited along the polymer rods. On the contrary, the highest concentration produced inhomogeneous infiltrated blocks and foam cavities appeared completely filled in some areas. 2D microcomputed sections and reconstructed 3D models evidenced this phenomenon and the frequency distribution of the thickness and separation of material trabeculae confirmed the heterogeneity of the distribution. When crushed, blocks prepared with the 25 g slurry provided the largest and irregular granulates.

In Vivo Regenerative Properties of Coralline‐Derived (Biocoral) Scaffold Grafts in Human Maxillary Defects: Demonstrative and Comparative Study with Beta‐Tricalcium Phosphate and Biphasic Calcium Phosphate by Synchrotron Radiation X‐Ray Microtomography

“…31 Briefly, a slurry containing 25 g of b-TCP was prepared with distilled water and used to substantially impregnate a block of polyurethane foam under vacuum. The b-TCP blocks were produced by using the foam technology as previously reported.…”

Multifunctional layers formation on the surface of NiTi SMA during β-tricalcium phosphate deposition

“…5a-c). The brown-yellow color was ascribed to β-TCP [25][26][27][28][29][30][31][32] ( Fig. 5b) while the darker was linked to the mixture of NiTi substrate, TiO 2 thin film [32,34] and phosphate groups [25][26][27][28][29][30][31][32] (Fig.…”

Analysis of β-tricalcium phosphate granules prepared with different formulations by nano-computed tomography and scanning electron microscopy

“…The method has gained a considerable interest in the study of bone and biomaterials and provides 3D and 2D measurements of porosity [17][18][19][20][21]. MicroCT was used to analyze the morphology and size of b-TCP granules but the method does not evidence the inner composition and the sintered minute grains composing the granules [11,13,22]. MicroCT of calcified objects uses a filtered polychromatic X-ray beam with an aluminum filter.…”

“…b-TCP granules b-TCP granules used in this study were produced by the polyurethane foam technology [12,13]. Briefly, b-TCP powder was mixed with distilled water to prepare six types of slurries with 10, 11, 15, 18, 21 and 25 g of powder per 100 ml of distilled water.…”