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Allogeneic cortical bone crossing pin

A technique of allogeneic and cortical bone, applied in the direction of internal bone synthesis, fixers, fastening devices, etc., can solve the problems of high cost of metal and absorbable material fixation, the existence of electrolytic reaction, and the influence of nuclear magnetic examination, etc., to achieve the benefit of Tendon-bone healing, ease of mass production, and prevention of the pendulum effect

Inactive Publication Date: 2015-01-07
刘畅 +1
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

At present, most of the internal fixation materials of tendon grafts are made of metal materials and absorbable materials. As foreign bodies, metal fixation objects will remain in the body permanently, and there will be electrolytic reactions, which will affect postoperative MRI examinations; The strength will decay over time, and the study found that the rate of nail breakage after Rigidfix absorbable nails was 17%
Recent literature reports that although the degradation products of absorbable materials are not harmful to the human body, they can induce an inflammatory response around the fixation, leading to osteolysis
And the cost of metal and absorbable material fixation is high, bringing financial burden to patients

Method used

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Examples

Experimental program
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Effect test

specific Embodiment 1

[0029] Allogeneic cortical bone transversal nails, a series of products with a diameter of 3.0mm-4.0mm and a length of 4.0cm-5.0cm. The front end is conical, and the nail body is a smooth cylindrical bone round nail. Refer to Figure 1.

[0030] The source of bone nail preparation material is bone bank. Select the middle and upper part of human femur with a length of 5.0 cm to 7.0 cm. After removing the periosteum and bone marrow, store it at -70°C to -85°C for 1 to 2 months; take it out and rewarm it for 1 hour. Cut it longitudinally into a column shape with a width of about 5.0mm-6.0mm, and use a precision lathe to process it into a bone nail with a diameter of 3.3mm-4.0mm and a length of 4.0cm-5.0cm; soak it in ether for 1 hour, and use normal saline to sonicate Wash and air-dry naturally; after gamma ray irradiation sterilization, the packaging bag is sealed and stored at deep low temperature for later use; refer to figure 2 .

specific Embodiment 2

[0032] The source of bone nail preparation material is bone bank. Select the middle and upper part of human femur with a length of 5.0 cm to 7.0 cm. After removing the periosteum and bone marrow, store it at -70°C to -85°C for 1 to 2 months; take it out and rewarm it for 1 hour. Cut it longitudinally into a column with a width of about 5.0mm-6.0mm, and use a precision lathe to process it into a bone nail with a diameter of 3.3mm-4.0mm and a length of 4.0cm-5.0cm; of specific embodiment 5 Sonicate in the sol for 0.5 hours, dry in an oven at 60°C, sterilize with radiation, process to obtain a series of cortical bone transversal nails with a diameter of 3.3mm to 4.0mm, seal the packaging bag, and store at low temperature for later use.

specific Embodiment 3

[0034] The source of bone nail preparation material is bone bank. Select the middle and upper part of human femur with a length of 5.0 cm to 7.0 cm. After removing the periosteum and bone marrow, store it at -70°C to -85°C for 1 to 2 months; take it out and rewarm it for 1 hour. Cut it longitudinally into a column with a width of about 5.0mm-6.0mm, and use a precision lathe to process it into a bone nail with a diameter of 3.3mm-4.0mm and a length of 4.0cm-5.0cm; of specific embodiment 6 Sonicate in the sol for 0.5 hours, dry in an oven at 60°C, sterilize with radiation, process to obtain a series of cortical bone transversal nails with a diameter of 3.3mm to 4.0mm, seal the packaging bag, and store at low temperature for later use.

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Abstract

The invention discloses an allogeneic cortical bone crossing pin, which belongs to medical apparatus and instruments. The source of the allogeneic cortical bone is wider, the processing technology is simple, and the allogeneic cortical bone crossing pin is easy for batch production and wide clinical application.

Description

technical field [0001] The invention belongs to a novel medical biological internal fixation device. Belongs to medical devices. Background technique [0002] Arthroscopic autologous hamstring tendon reconstruction of the anterior cruciate ligament is currently the best choice for repairing anterior cruciate ligament injuries. The fixation of the graft directly determines the prognosis after surgery. The fixation methods of the femoral graft mainly include suspension fixation (Endobutton, Transfix, etc.) and entry fixation (Interface screw, Interference, etc.). Endobutton has the highest initial fixation strength, but there is a wiper effect, and the bungee effect may cause bone marrow to expand. The interface screw is fixed at the entrance of the graft bone tunnel, which effectively overcomes the wiper and bungee effects, but the initial fixation strength is lower than that of the Endobutton, and the rear wall of the tunnel entrance may burst due to the extrusion of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/86
Inventor 刘畅刘玉杰
Owner 刘畅
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