Absorbable skull lock for fixing bone flap and manufacturing method of absorbable skull lock

Abstract

The invention discloses an absorbable skull lock or fixing a bone flap. The absorbable skull lock is characterized by comprising a lower pressing piece, wherein a screw rod is integrally manufactured in the middle of one end surface of the lower pressing piece, a handle is fixed to one end, away from the lower pressing piece, of the screw rod, the outer edge of the screw rod is sleeved with an upper pressing piece, one end surface, opposite to the lower pressing piece, of the upper pressing piece is provided with fixing teeth, the upper pressing piece is provided with an internal thread, the screw rod is provided with an external thread, and the inner diameter of the internal thread is matched with the outer diameter of the screw rod, so that the upper pressing piece can be matched on the screw rod and can move relative to the screw rod through the threads. The invention further discloses a manufacturing method of the absorbable skull lock. The skull lock is made of an absorbable material (lactide / glycolide copolymer), is suitable for both adult and child patients, is beneficial to reexamination of focus parts after an operation, and is particularly beneficial to patients needing to continue to receive radiotherapy after the operation.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to an absorbable skull lock for fixing a bone flap and a manufacturing method thereof. Background technique [0002] Bone flap reduction after craniotomy is the basic operation of neurosurgery. The free bone flap is reset and fixed to restore the integrity of the skull to the maximum extent, maintain the balance and stability of intracranial pressure, protect brain tissue, and avoid second-stage cranioplasty. When the free bone flap is reset, it needs to be fixed on the surrounding skull with the help of instruments to prevent the bone flap from shifting or pulsating with the brain tissue. [0003] At present, the skull lock made of titanium alloy is widely used clinically, but the main defect is that the scope of clinical application is limited to adults. For children, the skull is still in the growth and development stage, and the thinner skull titanium nails can easily p...

AI Technical Summary

Problems solved by technology

[0006] The use of magnesium alloy as a degradable material has the problems of easy corrosion and fast degradation rate. The rapid degradation rate will cause serious corrosion of the implanted material before the body heals, thereby reducing the mechanical properties and stability of the material.

In addition, the rapid corrosion of magnesium alloys will be accompanied by a large amount of hydrogen release, making it too late to diffuse and absorb and form bubbles around the implant, affecting the physiological functions of surrounding tissues and recovery treatment

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