CN212261493U

CN212261493U - Bone cement channel pedicle of vertebral arch ground anchor

Info

Publication number: CN212261493U
Application number: CN202020972558.7U
Authority: CN
Inventors: 吴育俊; 林海滨; 吴向军
Original assignee: Affiliated Hospital Of Putian University Putian No 2 Hospital
Current assignee: Affiliated Hospital Of Putian University Putian No 2 Hospital
Priority date: 2020-06-01
Filing date: 2020-06-01
Publication date: 2021-01-01
Anticipated expiration: 2030-06-01

Abstract

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. The utility model discloses a cavity bone cement passageway pedicle of vertebral arch anchor nail, the screw of screw in pedicle of vertebral arch inside part can firmly stabilize lasting anchoring in the pedicle of vertebral arch, reach bone cement block mass intensity, anchoring force and stability in the reinforcing centrum.

Description

Bone cement channel pedicle of vertebral arch ground anchor

[ technical field ] A method for producing a semiconductor device

The utility model belongs to the technical field of medical instrument consumptive material, specifically indicate a bone cement passageway pedicle of vertebral arch anchor nail.

[ 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.

[ Utility model ] content

The utility model aims to solve the technical problem that a bone cement passageway pedicle of vertebral arch anchor nail that facilitates use is provided, reaches bone cement block mass intensity, anchoring force and stability in the reinforcing centrum.

The utility model discloses a realize like this:

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 utility model has the advantages that: the utility model discloses a cavity bone cement passageway pedicle of vertebral arch anchor nail, the screw of screw in pedicle of vertebral arch inside part can firmly stabilize lasting anchoring in the pedicle of vertebral arch, squeeze into centrum inside part can with the centrum in the bone cement piece fully firmly combine, like reinforced concrete, make preceding centrum and the back centrum annex of being reinforceed by bone cement link into one. 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 present invention will be further explained with reference to the accompanying drawings in conjunction with the embodiments.

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 utility model discloses a bone cement passageway pedicle of vertebral arch anchor 100 bone cement passageway outer tube system that not only the fungible was established when going the centrum bone reinforce can strengthen bone cement block mass anchoring force, intensity and stability in the centrum moreover (through anchoring on centrum annex pedicle of vertebral arch), acts dual-purpose at one stroke, is particularly suitable for Kummell disease and needs to go PKP operation patient, and its application prospect is very wide.

The utility model discloses a cavity bone cement passageway pedicle of vertebral arch anchor nail, the screw of screw in pedicle of vertebral arch inside part can firmly stabilize lasting anchoring in the pedicle of vertebral arch, squeeze into centrum inside part can with the centrum in the bone cement piece fully firmly combine, like reinforced concrete, make preceding centrum and the back centrum annex of being reinforceed by bone cement link into one. 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 a 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.

Claims

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.