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Chracteristic of CT-Bone
Material
The material of the CT bone is non-sintered recrystallized porous calcium-deficient hydroxyapatite based on α-TCP which is the same material as our living bone.Therefore, non-sintered CT bone has high biocompatibility and is superior in bone resorption and substitution with living bone. On the other hand, most existing artificial bone materials are stoichiometric hydroxyapatite, and are sintered and processed into ceramics in order to enhance their crystallinity. As a result, the original biocompatibility is lost, and it becomes foreign matter like blood cells and bone cells. For these reasons, the material of the CT bone is superior to existing artificial bonein the biocompatibility, bioactivity, biodegradability, osteoinductivity, and bone substitution region,which will leads to fuse with the mother bone and replacement with new bone faster.
Fitting
The CT bone is a custom-made artificial bone molded by an ink-jet powder with three-dimensional layered modeling method (3D printer) based on the X-ray CT data of the affected part.Ｉt is possible to produce complicated shapes suited to the affected part based on the image data of the patient. Therefore, high adhesion to living bones can be secured immediately after transplantation. Most of the artificial bones are time-consuming because you need to cut the artificial bone in accordance with the transplantation site during operation, thus increasing time and surgical man-hours are needed. Also, since the shape of the artificial bone largely depends on the surgeon, it is doubtful whether the adhesiveness can always be secured.
Inner Structure
Since the CT bone is molded by an ink-jet powder with three-dimensional layered modeling method (3D printer) ,It is possible to make a fine internal structure suitable for invasion of bone tissue and angiogenesis. In addition, the CT bone material (non-sintered recrystallized porous calcium-deficient hydroxy-apatite) has a porosity of 60% in its internal structure and a complicated form of mutually connected / continuous pores or cavities. Therefore, the structure makes blood vessels and cells move more easily than existing artificial bones. Therefore, CT bone is excellent in bone resorption substitution ability, it enables the early formation of new bone inside, and the formation of bone marrow in the end. On the contrary, existing artificial bones can not design and impart internal structure in a systematic way like 3D printers, and because they are crystal structures of sintered bodies, pores are randomly distributed, interconnect pores and cavities are not formed.
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