Implant material for promoting bone wound healing and preparation method thereof

An implant material and wound healing technology, which is applied in the field of medical materials, can solve the problems of chemotherapy, insufficient mechanical strength, and non-degradable absorption of cancer patients affected by imaging examinations, and achieve good absorbability, biocompatibility, and good biocompatibility Sexuality and bioactivity, effect of promoting bridging healing

Inactive Publication Date: 2018-05-15
AFFILIATED YONGCHUAN HOSPITAL OF CHONGQING MEDICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Internal bone fixation is a routine method in orthopedic trauma surgery, bone defect repair surgery, and plastic surgery. Currently, internal fixation plates and screws are most commonly made of pure titanium or titanium alloy, which have stable fixation effects and superior biocompatibility. It provides a good internal environment for bone tissue healing, but it also has the following problems: (1) The elastic modulus of titanium metal is 8 times that of cortical bone, and it has a stress shielding effect on normal bone tissue, which is easy to cause osteoporosis and relapse Fracture; (2) It cannot be degraded and absorbed. If it is used for a long time, it will block X-rays and affect imaging examinations and chemotherapy for cancer patients.
However, the mechanical strength of the absorbable internal fixation polymer material is insufficient. If the absorbable polymer plate is fixed on the broken end of the fracture under a large force, as the absorbable plate degrades, the fixation force will weaken, which may lead to secondary fractures.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An implant material for promoting bone wound healing, which is composed of a polylactic acid matrix and a medical magnesium alloy skeleton suspended in the polylactic acid matrix. The medical magnesium alloy skeleton is a wavy mesh made of two layers of medical magnesium alloy wires. The structure is superimposed, the surface of the polylactic acid matrix is ​​modified with a porous hydroxyapatite layer, and the micropores of the hydroxyapatite layer are filled with salvianolic acid B microcapsules and vancomycin microcapsules. Among them, 1) the capsule wall material of salvianolic acid B microcapsules and vancomycin microcapsules is a blend of carboxymethyl chitosan and alginic acid; 20% of the total weight of the material, the polylactic acid matrix accounts for 75% of the total weight of the material, the porous hydroxyapatite layer accounts for 4% of the total weight of the material, the salvianolic acid B microcapsules account for 0.7% of the total material weight,...

Embodiment 2

[0025] An implant material for promoting bone wound healing, which consists of a polylactic acid matrix and a medical magnesium alloy skeleton suspended in the polylactic acid matrix. The medical magnesium alloy skeleton is a wavy mesh made of 5 layers of medical magnesium alloy wires. The structure is superimposed, the surface of the polylactic acid matrix is ​​modified with a porous hydroxyapatite layer, and the micropores of the hydroxyapatite layer are filled with salvianolic acid B microcapsules and vancomycin microcapsules. Among them, 1) the capsule wall material of salvianolic acid B microcapsules and vancomycin microcapsules is a blend of polymethyl methacrylate and alginic acid; 40% of the total weight of the material, the polylactic acid matrix accounts for 50% of the total weight of the material, the porous hydroxyapatite layer accounts for 7% of the total weight of the material, the salvianolic acid B microcapsules account for 1.5% of the total weight of the materi...

Embodiment 3

[0028] An implant material for promoting bone wound healing, which is composed of a polylactic acid matrix and a medical magnesium alloy skeleton suspended in the polylactic acid matrix. The medical magnesium alloy skeleton is a wavy mesh made of 3 layers of medical magnesium alloy wires. The structure is superimposed, the surface of the polylactic acid matrix is ​​modified with a porous hydroxyapatite layer, and the micropores of the hydroxyapatite layer are filled with salvianolic acid B microcapsules and vancomycin microcapsules. Among them, 1) the wall material of salvianolic acid B microcapsule and vancomycin microcapsule adopts carboxymethyl chitosan; Accounting for 67.8% of the total weight of the material, the porous hydroxyapatite layer accounts for 5% of the total weight of the material, the salvianolic acid B microcapsules account for 1.2% of the total weight of the material, and the vancomycin microcapsules account for 1% of the total weight of the material; 3 ) Th...

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Abstract

The invention discloses an implant material for promoting bone wound healing and a preparation method thereof, which relate to the technical field of a medical material. The bone implant material is composed of a polylactic acid matrix and a medical magnesium alloy frame hanged in the polylactic acid matrix, the medical magnesium alloy frame is obtained by weaving the medical magnesium alloy wiresto form a wave-shape net structure through superposition, the surface of the polylactic acid matrix is modified with a porous hydroxy apatite layer, and the micropores of the hydroxy apatite layer are filled with danshinolic acid B and vancomycin microcapsules. The implant material has good biological compatibility, large specific surface area, and high amount of porosity, is suitable for newbornosteocyte growth, promotes fracture position bridging healing, has strong fixing stability during a fracture bridging healing process, and can prevent secondary fracture; danshinolic acid B and vancomycin with effective concentration can be kept in a medicine system for long-term, so that the continuous inflammation resisting and bridging healing promotion for the fracture can be realized.

Description

technical field [0001] The invention relates to the technical field of medical materials, in particular to an implant material for promoting bone wound healing and a preparation method thereof. Background technique [0002] Internal bone fixation is a routine method in orthopedic trauma surgery, bone defect repair surgery, and plastic surgery. Currently, internal fixation plates and screws are most commonly made of pure titanium or titanium alloy, which have stable fixation effects and superior biocompatibility. It provides a good internal environment for bone tissue healing, but it also has the following problems: (1) The elastic modulus of titanium metal is 8 times that of cortical bone, and it has a stress shielding effect on normal bone tissue, which is easy to cause osteoporosis and relapse Fracture; (2) It cannot be degraded and absorbed. If it is used for a long time, it will block X-rays and affect imaging examinations and chemotherapy for tumor patients. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61L27/44A61L27/12A61L27/54A61L27/56
CPCA61L27/12A61L27/446A61L27/54A61L27/56A61L2300/216A61L2300/252A61L2300/41A61L2300/412A61L2300/622C08L67/04
Inventor 朱凤臣
Owner AFFILIATED YONGCHUAN HOSPITAL OF CHONGQING MEDICAL UNIV
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