阅读说明：本技术 一种骨水泥通道椎弓根锚钉 (Bone cement channel pedicle of vertebral arch ground anchor ) 是由 吴育俊 林海滨 吴向军 于 2020-06-01 设计创作，主要内容包括：一种骨水泥通道椎弓根锚钉,所述锚钉为一空心圆柱体,依次包括：前端螺纹段、螺帽段、后端尾套管段；所述前端螺纹段的顶端为尖端部,所述前端螺纹段从前端往尾端的螺纹的螺距逐渐变小；所述前端螺纹段的长度为4.5cm,所述尾套管段的长度为10cm。所述锚钉的材质为金属钛。本发明的中空骨水泥通道椎弓根锚钉,旋入椎弓根内部分的螺钉能牢固稳定持久锚定于椎弓根内,达到增强椎体内骨水泥团块强度、锚定力及稳定性。(A bone cement passageway pedicle of vertebral arch anchor, the anchor is a hollow cylinder, includes in proper order: a front end screw thread section, a screw cap section and a rear end tail sleeve section; the top end of the front end thread section is a tip part, and the thread pitch of the front end thread section is gradually reduced from the front end to the tail end; the length of the front end thread section is 4.5cm, and the length of the tail sleeve pipe section is 10 cm. The anchor is made of metal titanium. According to the hollow bone cement channel pedicle anchor, the screw screwed into the inner part of the pedicle can be firmly, stably and durably anchored in the pedicle, so that the strength, anchoring force and stability of a bone cement block mass in a vertebral body are enhanced.)

1. The utility model provides a bone cement passageway pedicle of vertebral arch anchor which characterized in that: the anchor nail is a hollow cylinder, includes in proper order: a front end screw thread section, a screw cap section and a rear end tail sleeve section; the thread pitch of the thread of the front end thread section from the front end to the tail end is gradually reduced; the length of the front end thread section is 4.5cm, and the length of the tail sleeve pipe section is 10 cm.

2. The bone cement access pedicle anchor of claim 1, wherein: the anchor is made of metal titanium.

3. The bone cement access pedicle anchor of claim 1, wherein: the internal diameter of the front end thread section of the anchor is 3 mm.

4. The bone cement access pedicle anchor of claim 1, wherein: the external diameter of the front end thread section of the anchor is 5.5 mm.

5. The bone cement access pedicle anchor of claim 1, wherein: the unilateral spiral depth of the front end screw thread section of the anchor nail is 0.4 mm.

6. The bone cement access pedicle anchor of claim 1, wherein: the wall thickness of the front-end threaded section of the anchor is 0.8 mm.

7. The bone cement access pedicle anchor of claim 1, wherein: the inner wall of the front end thread section, which is close to the nut section, is provided with a section of internal thread.

[ technical field ] A method for producing a semiconductor device

The invention belongs to the technical field of medical instrument consumables, and particularly relates to a bone cement channel pedicle anchor.

[ background of the invention ]

With the increase of the life-span of the human body and the aging of the population, the incidence of the senile osteoporosis vertebral compression fracture is increased year by year. Statistically, about 140 million patients with osteoporotic vertebral fractures are generally not accompanied by neurological symptoms every year worldwide. About 30% of osteoporotic vertebral fracture collapse occurs, while 13% of these exhibit nonunion and 3% collapse occurs with late nerve damage. Aiming at the fracture, PVP/PKP is a safe, minimally invasive and positive technology for treating the fracture. However, the complications caused by the bone cement injection cannot be effectively solved, such as the problems of high reduction loss, instability, pain, nerve injury and the like of the vertebral body caused by loosening, displacement and extrusion of a bone cement mass after the bone cement injection. This is often seen in Kummell patients, and due to old fracture, fissured cavities, scars, sclerosis, pseudoarthrosis and the like are formed in the vertebral body, so that the bone cement is not well dispersed in the vertebral body, the anchoring force is seriously insufficient, and the long-term curative effect of the patients is affected.

At present, aiming at the situation, people try to keep a bone cement column in the vertebral pedicle so as to enhance the anchoring force and stability of a bone cement block in the vertebral body and prevent displacement and loosening. This approach is not successful in firmly bonding to the cement mass in the vertebral body, and even if successful in bonding, the anchoring force, strength and stability are far from satisfactory for clinical use (mechanical stability is very poor). For such fracture patients, it is common to the elderly and the elderly, and the patients often suffer from physical conditions and basic medical diseases such as heart and lung, and cannot tolerate major operations such as auxiliary internal fixation and fusion. The internal fixation easily causes related complications such as re-fracture due to stress concentration of the adjacent vertebral body, loosening and prolapse of the internal fixation nail channel, and thus brings great trouble to clinical treatment. How to solve the problems becomes a problem which needs to be solved urgently by orthopedics clinicians.

[ summary of the invention ]

The invention aims to solve the technical problem of providing a convenient bone cement channel pedicle anchor to enhance the strength, anchoring force and stability of bone cement blocks in a vertebral body.

The invention is realized by the following steps:

the utility model provides a bone cement passageway pedicle of vertebral arch anchor, the anchor is a hollow cylinder, includes in proper order: a front end screw thread section, a screw cap section and a rear end tail sleeve section; the thread pitch of the thread of the front end thread section from the front end to the tail end is gradually reduced; the length of the front end thread section is 4.5cm, and the length of the tail sleeve pipe section is 10 cm.

Furthermore, the anchor is made of metal titanium.

Further, the internal diameter of the front threaded section of the anchor is 3 mm.

Further, the external diameter of the front threaded section of the anchor is 5.5 mm.

Further, the single-side thread depth of the front-end thread section of the anchor is 0.4 mm.

Further, the wall thickness of the front threaded section of the anchor is 0.8 mm.

Further, the inner wall of the front end thread section, which is close to the nut section, is provided with a section of internal thread.

The invention has the advantages that: the hollow bone cement channel pedicle anchor is characterized in that a screw screwed into the inner part of the pedicle can be firmly, stably and durably anchored in the pedicle, the inner part of the driven vertebral body can be fully and firmly combined with a bone cement block in the vertebral body, and the front part of the vertebral body strengthened by bone cement is connected with the rear vertebral body accessory into a whole like reinforced concrete. Because the metallic titanium has stronger rigidity, the strength, anchoring force and stability of the bone cement block mass in the vertebral body are enhanced. Effectively avoiding the need of additional auxiliary internal fixation and providing a solution for patients who cannot tolerate major surgery. The system can replace a bone cement outer cannula channel system clinically established in the PKP/PVP at present, does not increase additional medical cost, lightens the burden of patients and medical insurance, and can obviously simplify the operation steps, thereby shortening the operation time.

[ description of the drawings ]

The invention will be further described with reference to the following examples with reference to the accompanying drawings.

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

[ detailed description ] embodiments

As shown in fig. 1 and 2, a bone cement passage pedicle anchor 100, the anchor 100 is made of titanium. Anchor 100 is a hollow cylinder, comprising in order: a front-end thread section 101, a nut section 102 and a rear-end tail sleeve section 103; the pitch of the thread of the front-end thread segment 101 from the front end to the tail end becomes gradually smaller; the length of the front-end thread section 101 is 4.5cm, and the length of the tail sleeve pipe section 103 is 10 cm.

The inner diameter (hollow diameter) of the front end thread section 101 is 3mm, and the outer diameter (including threads) is 5.5 mm. The single thread depth of the leading thread segment 101 is 0.4mm and the wall thickness (excluding the thread) is 0.8 mm.

The operation process is as follows:

the first step is as follows: a transpedicular intraspinal access was first established with a 2.5mm diameter puncture needle.

The second step is that: the bone cement channel pedicle anchor 100 is screwed into the vertebral body from 1/3 to 1/2 along the puncture guide needle through the skin.

The third step: the pedicle anchor 100 along the bone cement tunnel is then drilled with a bone drill to expand the vertebral body to the anterior wall of the vertebral body (without puncturing).

The fourth step: the push rod filled with the bone cement is moved along the pedicle anchor 100 of the bone cement channel according to the normal steps until the vertebral body is strengthened until the penetration of the bone cement is close to the back wall of the vertebral body and the injection is stopped.

The fifth step: the bone cement can be further screwed to about 5mm-10mm to the front 1/3 of the vertebral body according to the situation before the cement is not solidified.

And a sixth step: the inner core is screwed in and locked (optional or not according to the condition in the operation, and bone cement can be filled for replacement), and finally the tail sleeve pipe section 103 is broken off, and the nut section 102 is reserved.

The bone cement channel pedicle anchor 100 can replace a bone cement channel outer sleeve system established during vertebral body bone strengthening, can enhance the anchoring force, strength and stability of bone cement block masses in a vertebral body (by anchoring on vertebral body accessory pedicle), has two functions by one action, is particularly suitable for patients with Kummell disease and PKP operation, and has very wide application prospect.

The hollow bone cement channel pedicle anchor is characterized in that a screw screwed into the inner part of the pedicle can be firmly, stably and durably anchored in the pedicle, the inner part of the driven vertebral body can be fully and firmly combined with a bone cement block in the vertebral body, and the front part of the vertebral body strengthened by bone cement is connected with the rear vertebral body accessory into a whole like reinforced concrete. Because the metallic titanium has stronger rigidity, the strength, anchoring force and stability of the bone cement block mass in the vertebral body are enhanced. Effectively avoiding the need of additional auxiliary internal fixation and providing a solution for patients who cannot tolerate major surgery. The system can replace a bone cement outer cannula channel system clinically established in the PKP/PVP at present, does not increase additional medical cost, lightens the burden of patients and medical insurance, and can obviously simplify the operation steps, thereby shortening the operation time.

The above description is only an example of the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.