Bone fracture plate made of carbon-carbon composite material and preparation method of bone fracture plate

Abstract

The invention discloses a preparation method of a bone fracture plate made of a carbon-carbon composite material. The preparation method comprises the following steps: cutting a 0-degree non-woven fabric, a carbon fiber net tire and a 90-degree non-woven fabric according to the design size, carrying out alternating laminating in sequence, and filling the space among the layers with needled carbonfibers; placing the product on a heating table for preheating, covering the product formed after alternating laminating with pyrolytic carbon, carrying out extruding for exhausting the air among the layers, placing the product in a pre-forming mould, and carrying out pre-forming according to the design shape of the pre-forming mould; placing the product after pre-forming into a preheating oven forpreheating, taking out the product, placing the product into a forming mould for hot press forming, thus obtaining the carbon-carbon composite material; and carrying out cooling on the mold after hotpress forming, taking out the product, carrying out washing and drying on the product, and carrying out CNC machining according to the design drawing of the bone fracture plate, thus obtaining the bone fracture plate made of the carbon-carbon composite material. The bone fracture plate has good biocompatibility, and has the mechanical property similar to that of the human hone, and meanwhile, theinterferences or obstruction can not be generated on MRI, CT and X-ray examination.

Description

technical field [0001] The invention relates to the technical field of biomedical materials, in particular to a carbon-carbon composite bone plate and a preparation method thereof. Background technique [0002] Traditional bone plates are mostly made of metal, mainly stainless steel and titanium alloy. However, metal bone plates mainly have the following problems in clinical application: (1) there is stress shielding, which easily destroys the blood supply at the fracture site; (2) it is prone to electrochemical reaction corrosion in the body; (3) it cannot directly promote fracture Healing, postoperative complications such as delayed union or nonunion, bone plate fracture, screw loosening and rejection, and rejection are prone to occur; (4) X-ray, CT and MRI examination results of patients are often seriously affected by the metal bone plate, resulting in The test result is inaccurate. [0003] Patent document CN2223081Y discloses a carbon fiber-reinforced epoxy resin bon...

AI Technical Summary

Problems solved by technology

However, metal bone plates mainly have the following problems in clinical application: (1) there is stress shielding, which easily destroys the blood supply at the fracture site; (2) it is prone to electrochemical reaction corrosion in the body; (3) it cannot directly promote fracture Healing, postoperative complications such as delayed union or nonunion, bone plate fracture, screw loosening and rejection, and rejection are prone to occur; (4) X-ray, CT and MRI examination results of patients are often seriously affected by the metal bone plate, resulting in Inaccurate test results

[0003] Patent document CN2223081Y discloses a carbon fiber-reinforced epoxy resin bone plate, in which carbon fiber woven fabrics soaked in epoxy resin glue are stacked in parallel and cured under pressure. The surrounding tissue after implantation is easily stimulated to produce an inflammatory response

Patent document CN1296013C discloses a carbon fiber-reinforced polyether ether ketone composite bone plate, which is obtained by mixing carbon fiber particles and polyether ether ketone and then injection molding. Since it is injection molding, continuous carbon fibers with a length greater than 2cm cannot be used, nor can A continuously spread structure is obtained, therefore, the reinforcement provided by the carbon fibers is not fully utilized

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