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Compound porous beta-TCP (tertiary calcium phosphate) titanium alloy human astragal support bar and preparation method thereof

A titanium alloy and support rod technology, which is applied in medical science, prostheses, joint implants, etc., can solve the problems of poor load resistance and low mechanical strength, and achieve good tissue compatibility, no toxic side effects, and low The effect of the stress shielding effect

Active Publication Date: 2014-07-16
维度(西安)生物医疗科技有限公司
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Problems solved by technology

But β-TCP has an unavoidable disadvantage: low mechanical strength and poor load resistance

Method used

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  • Compound porous beta-TCP (tertiary calcium phosphate) titanium alloy human astragal support bar and preparation method thereof
  • Compound porous beta-TCP (tertiary calcium phosphate) titanium alloy human astragal support bar and preparation method thereof

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] 1) Preparation of porous titanium alloy talus support rod

[0024] The porous titanium alloy human talus support rod model was prepared according to the preparation requirements by computer-aided design, titanium alloy Ti6Al4V powder was added to the electron beam melting equipment, and the designed model data was input into the electron beam melting equipment. -40mA electron beam current, 10000mm / s-18000mm / s scanning speed to preheat titanium alloy powder, and then 5mA-7mA electron beam current, 300mm / s-500mm / s scanning speed to melt titanium alloy layer by layer powder, prepared a porous titanium alloy human talus support rod, which was sterilized by ultrasonic cleaning at high temperature and high pressure;

[0025] This embodiment is as figure 1 , figure 2 The specifications of the porous support rod shown are: length (L): 20 mm, diameter (D): ...

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Abstract

The invention discloses a compound porous beta-TCP (tertiary calcium phosphate) titanium alloy human astragal support bar and a preparation method thereof. The preparation method includes the steps: firstly, inputting model data into an electronic beam melting device according to design requirements to prepare the needed porous titanium alloy human astragal support bar; and secondly, mixing powdery beta-TCP with hydrogen peroxide and polyvinyl alcohol solution into pasty slurry, pouring the pasty slurry into pores of a titanium alloy support after sufficiently and uniformly stirring the pasty slurry, removing excess water by an evaporation method, and performing rubber discharging and sintering to obtain the compound biological ceramic porous beta-TCP titanium alloy human astragal support bar. The porous titanium alloy human astragal support bar prepared by the preparation method has an elastic modulus similar to that of a human bone tissue, the compressive strength of the support bar is higher than that of a spongy bone and slightly lower than a cortical bone, the support bar can provide effective biomechanical support in an astragal after being implanted into the astragal by the aid of a regular pore structure and internally compounded porous beta-TCP components with fine osteoinductive activity, and the support bar has an excellent osseointegration capacity.

Description

technical field [0001] The invention relates to a preparation method of a support rod for treating early talus osteonecrosis, in particular to a composite porous β-TCP titanium alloy human talus support rod and a preparation method thereof. Background technique [0002] Osteonecrosis of the talus is a kind of disease that is difficult to treat in orthopedics. Its clinical manifestations are pain and limited ankle joint movement, which often bring a lot of inconvenience to the work and life of the patients. Early osteonecrosis of the talus can be treated conservatively and simple surgery Methods such as core decompression are used for treatment, but the therapeutic effect is also limited, and arthrodesis is often used to relieve clinical symptoms in patients with middle and advanced stages, at the cost of partial or complete loss of ankle joint function (Delanois RE, Mont MA , Yoon TR, et al. Atraumatic osteonecrosis of the talus. J Bone Joint Surg Am. 1998; 80:529-536.). At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/11B22F3/105B22F3/26A61F2/42A61L27/46
Inventor 郭征袁超凡
Owner 维度(西安)生物医疗科技有限公司
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