Implant for orthopedics department, material for preparing implant and preparation method of implant

An orthopaedic implant and implant technology, applied in the field of implants, can solve the problems of weak interface between glass fiber and resin matrix, unsatisfactory uniform dispersion effect, poor compatibility, etc., and achieve good fracture healing effect. The effect of improving dispersion uniformity and increasing strength

Inactive Publication Date: 2018-05-25
SHANGHAI MICROPORT MEDICAL (GROUP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the efficiency of modifying the surface of glass fiber by coupling agent is low, and the bonding ability of glass fiber and resin matrix interface after coupling treatment is weak (that is, the compatibility of existing glass fiber and polylactic acid is poor) , the uniform dispersion effect of glass fiber modified in polylactic acid in this patent is not ideal

Method used

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  • Implant for orthopedics department, material for preparing implant and preparation method of implant
  • Implant for orthopedics department, material for preparing implant and preparation method of implant
  • Implant for orthopedics department, material for preparing implant and preparation method of implant

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preparation example Construction

[0053] like figure 1 Shown, the preparation method of the implant of the present embodiment comprises the following steps:

[0054] Step 1: Prepare glass fibers containing polylactic acid molecular chain structure.

[0055] Step 2: Composite the glass fibers and polylactic acid and then process them into shapes.

[0056] like figure 2 As shown, preferably, the glass fiber containing the polylactic acid molecular chain structure in the step 1 is made by the following method:

[0057] Step 11: selecting continuous first glass fibers and pretreating the first glass fibers to produce second glass fibers containing hydroxyl functional groups.

[0058] Step 1 and 2: Perform surface modification treatment on the second glass fiber to produce glass fiber with polylactic acid molecular chain structure on the surface. Herein, for the sake of clarity, the glass fiber with polylactic acid molecular chain structure on the surface is defined as the third glass fiber, the same below.

...

Embodiment 1

[0087] In this embodiment, the material used to prepare orthopedic implants is obtained in the following manner:

[0088] First of all, select high-purity and continuous first glass fiber, and its compound mass fractions are respectively:

[0089] SiO 2 : 54~56%; Na 2 O: 7.5-8%; CaO: 20-21%; K 2 O: 12-14%; MgO: 2-3%; P 2 o 5 : 1.5%; the impurity content is not more than 1%, and the tensile strength of the first glass fiber is greater than 3000MPa, and the flexural modulus is greater than 70GPa.

[0090] Secondly, the first glass fiber is dispersed under the drive of the unwinding roller and the pulling roller, and after infrared heating, it is repeatedly passed through a mixed solution with a volume concentration of 0.8% (tetramethylammonium hydroxide and methanol) for about 45 minute.

[0091] Afterwards, the pretreated first glass fiber is washed with deionized water, and dried to obtain the second glass fiber.

[0092] Subsequently, the second glass fiber is disperse...

Embodiment 2

[0100] Similar to the first embodiment, the reaction environment is set to nitrogen protection, but the resin formula is adjusted to isocyanate-terminated low-molecular-weight polylactic acid (molecular weight is selected to be about 2000Da), and at a temperature of 160 ° C, the isocyanate The low-molecular-weight polylactic acid terminated by cyanate group is melted and mixed, and the isocyanate group reacts with the hydroxyl group on the surface of the second glass fiber to obtain the third glass fiber containing the low-molecular-weight polylactic acid terminated by isocyanate group.

[0101] Afterwards, the third glass fiber is dispersed by the splitting roller, and after being heated by infrared, it is pulled by the pulling shaft into the impregnation mold filled with melt, and melted and impregnated with the polylactic acid in the impregnation mold to form a prepreg tape. Next, the prepreg tape is melted and compounded with polylactic acid and extruded into a cylindrical ...

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Abstract

The invention provides an implant for the orthopedics department, a material for preparing the implant and a preparation method of the implant. The material for preparing the implant is formed by compositing glass fiber serving as a reinforcing phase and polylactic acid serving as a base phase. The preparation method of the implant comprises the steps as follows: step 1, preparing the glass fibercontaining a polylactic acid molecular chain structure; step 2, compositing the glass fiber and polylactic acid and then performing processing. The compatibility and dispersion uniformity of the glassfiber and the polylactic acid base body are improved, the strength of the polylactic acid implant is improved effectively, the stress shielding effect can be avoided, and the implantation effect is good.

Description

technical field [0001] The invention relates to an implant, in particular to a material for preparing a high-strength and degradable implant and a preparation method thereof. Background technique [0002] Fracture is a common case of clinical surgical trauma, and conventional treatment measures include reduction, immobilization, rehabilitation training and drug-assisted treatment. Among them, fixation is widely used in the treatment of fractures and bone injuries. Orthopedic implants are used to internally fix trauma, and good curative effects have been achieved so far. Good orthopedic implants should have the following conditions: 1) The mechanical properties are close to those of bone materials, with suitable tensile strength, compressive strength, bending strength, shear strength and fatigue resistance; 2) The material has good biocompatibility , will not cause secondary damage to the tissue; 3) good biological stability, can promote bone tissue to heal as soon as possib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/44A61L27/58
CPCA61L27/44A61L27/58A61L2400/18A61L2430/02C08L67/04
Inventor 陈树国罗七一
Owner SHANGHAI MICROPORT MEDICAL (GROUP) CO LTD
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