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¡¾1925¡¿Artificial materials

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    Things that can replace human bones must be as hard as bones, so metal materials are common in orthopedics.

    ¡°If these pieces hadn¡¯t appeared in the surgeon¡¯s box, at first glance, one would have thought they were some machine parts.

    The cylindrical shape looks like a mesh when closed. This thing is called a titanium cage, which is a type of orthopedic material.

    ??Just looking at the structure, you know that it should be a simple device, and it is indeed so.  It is the least complex supporting material in the fixed fusion artificial vertebral body.  Since it does not have a height adjustment device, it cannot be adjusted during surgery, and its stability relies on the awls at the head and tail ends. The surgeon can only add titanium plates or nail rods to help fix it.

    Medical materials are constantly developing. In view of the shortcomings of the titanium cage that cannot be adjusted in height, another artificial vertebral body that can be adjusted in height will definitely be invented called an adjustable fixed artificial vertebral body.

    This kind of artificial vertebra is like the one that Xie Wanying is holding in the hand of her predecessor. The structure is actually not complicated. It is a cone composed of an inner cylinder and an outer cylinder, plus an adjustment screw.  If the surgeon wants to adjust the height during the operation, the inner tube should be raised and then fixed. If the surgeon wants to lower it, the inner tube should be pushed down and then fixed.  It can be adjusted, but the inner cylinder plus the outer cylinder are only fixed by screws. If you think about it, the stability is not very reliable.  Therefore, the surgeon must also add a nail rod system to assist in fixation.

    How to enhance the self-stability of artificial vertebral bodies, medical scientists have invented the following called self-fixing artificial vertebral bodies.  This kind of artificial vertebral body does not need to add titanium plates and nail rod systems. It relies on its own front and rear ends to be directly fixed to the adjacent vertebral body with screws.

    The above three types are all fusion artificial vertebrae. They are developed step by step and strive to overcome the previous defects. However, in the end there will be corresponding surgical sequelae due to loss of mobility.

    Here we have to say that when the vertebral bodies are removed during surgery, the cartilage tissue between the vertebral bodies, that is, the intervertebral discs, must be removed at the same time.  Only in this way can the artificial vertebral body be fixed between the front and rear vertebral bodies.  After the intervertebral disc is removed, it is conceivable that the physiological function of this part of the spine will be affected.  Therefore, the fusion artificial vertebral body is fixed and cannot bend, so it cannot replace the intervertebral disc. In this case, the pressure of spinal activity can only be transmitted to the adjacent vertebral bodies. Poor adjustment may eventually lead to degeneration of the intervertebral discs in the adjacent vertebral bodies.  If the patient is an elderly person who already has intervertebral disc atrophy, the situation will become more serious in the future.

    Understanding this flaw, the movable artificial vertebral body was invented.  The purpose of the movement is to benchmark the artificial vertebral body that replaces the function of the intervertebral disc. This vertebral body has part of the function of the intervertebral disc and can bend forward, bend, and rotate normally.  However, these movable artificial vertebrae are not yet mature and are still in the exploratory stage.  The ideal is very beautiful, but it is difficult to achieve the same goal as the original organs and tissues of the human body and to be very obedient and equivalent to the Creator.  The latest upgraded product is definitely more expensive than the old model. In order to save money, the fixed artificial vertebral body plus nail rod system is more common in clinical practice. It relies on the technical efforts of doctors to make up for the shortcomings of the fixed type.

    After reading these things, people in other departments are really reviewing their orthopedic knowledge.  One by one, they looked at Chang Jiawei while they were lost in thought.  Can you put this artificial vertebra in the most appropriate position and adjust it to the most appropriate height?  (Remember the website address: www.hlnovel.com
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