Dahllite-based biomaterial

The high brilliance X-ray diffraction pattern of the new biomaterial was compared with that of the cortical bone of a rabbit and also sintered HAP. The dahllite-based biomaterial had a diffraction pattern very similar to that of the bone, while sintered HAP was highly crystalline. The crystallite sizes of bone as well as their biomaterial were very similar, equal to an average size of 5 nm. Unlike bone, however, the crystallites in the biomaterial oriented unidirectionally because they were rapidly formed in the absence of an organic matrix. The density of the new biomaterial was found to be 1.3 g cm , and the average pore diameter was 30 nm. These measurements indicate that both crystallite size and the porosity are at the nanoscale and result in broad peaks in the X-ray diffraction pattern. Bigger crystallites would have yielded sharper peaks in the sintered HAP. 

There have been significant advances in CBPC-based biomaterials in the last few years, particularly Ceramicrete-based dental cement and dahllite-based bioceramics. 

In clinical tests the dahllite-based material was injected as an implant for internal stabilization of a wrist fracture. The ingredients were mixed to form a slurry that was injected in the patient s body. The paste set within minutes under physiological conditions. The material was allowed to harden in situ before a cast was applied. The healing process was more rapid compared to conventional techniques. The new biomaterial resisted compressive forces from the musculature and the wrist healed faster than indicated by historical controls. 

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See also in sourсe #XX -- [ ]

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