CN202859389U

CN202859389U - Spinal column insert

Info

Publication number: CN202859389U
Application number: CN2012205764427U
Authority: CN
Inventors: 褚德余
Original assignee: SHANGHAI PUWEI MEDICAL INSTRUMENT FACTORY CO Ltd
Current assignee: SHANGHAI PUWEI MEDICAL INSTRUMENT FACTORY CO Ltd
Priority date: 2012-11-05
Filing date: 2012-11-05
Publication date: 2013-04-10
Anticipated expiration: 2022-11-05

Abstract

A spinal column insert comprises an outer shell, a horizontal through hole, a vertical through hole, a fixing screw hole and locating teeth. The outer shell is made of polyether-ether-ketone materials and is in a cuboid shape or a waist shape bent along a horizontal direction. The horizontal through hole penetrates through the inner portion of the outer shell horizontally. The vertical through hole penetrates through the inner portion of the outer shell vertically and is communicated with the horizontal through hole. The fixing screw hole is formed at one end of the outer shell and is communicated with the horizontal through hole and the vertical through hole. The locating teeth are in a sawtooth shape or a triangle tooth shape and are arranged on the upper surface and the lower surface of the outer shell. The spinal column insert is high in strength, good in abrasive resistance and reasonable in structure, the insert can be easily implanted in a spinal column and fused with a self-body bone, and the insert has mechanical property similar to a human bone, good biocompatibility, good chemical stability and good X-light transmission performance.

Description

A kind of spinal column inserts

Technical field:

This utility model relates to a kind of device for the skeleton rectification, and particularly a kind of spinal column inserts of implant into body belongs to technical field of medical instruments.

Background technology:

Spondylopathy is sclerotin, intervertebral disc, ligament, the myogenesis pathological changes of vertebra, and then compressing, traction stimulate spinal cord, spinal nerves, blood vessel, vegetative nerve thereby complicated and diversified symptom to occur, its cardinal symptom is: can not be uprightly, headache, dizzy, blurred vision, hypomnesis, neck shoulder ache, inappetence, regurgitation, vomiting, weakness of the lower extremities, and severe patient may cause paralysis.In recent years, along with increasing of people's day by day modernized caused bad life habits of life, such as: the minimizing of limb activity, long-time bending over one's desk working or the incorrect use of other work, computer and air-conditioning etc. with same posture, the morbidity crowd of this disease is more and more wider, age is more and more less, and symptom becomes increasingly complex.According to statistics, 97% suffers from vertebrae disease in China's mid-aged population, and in the crowd below 40 years old, the people's vertebra more than 40% has various diseases, bend over the desk to learn the 70%-80% that accounts for sum of incorrect posture among the students in middle and primary schools, and the sickness rate of child's For The Treatment of Scoliosis is up to more than 25%.Clinically two kinds of methods, i.e. operative treatment and non-operative treatment are mainly adopted in the treatment of spondylopathy.Most patients do not have necessity of operation, and operative treatment is mainly more serious for symptom, and is invalid through strict non-operative treatment, and health still can tolerate the patient of operation.

Between vertebra, implant artificial inserts and be one for the treatment of operation to the patient of vertebra vertebral body gap Serious Stenosis, operation struts interbody space by implanting the spinal column inserts, recover disc height, and enlarge thus intervertebral foramina, thereby reach the purpose that reduces spinal cord, spinal nerve root compressing and stimulation.Existing medical spinal column inserts all exists the deficiency of degree varies: the unreasonable implantation difficulty that causes of the shape that has, some structures make the spinal column inserts be difficult to merge with intervertebral disc, some surfaces and human vertebrae can't cause producing displacement by close contact, some employing metal materials are made, such as titanium alloy, there are elastic modelling quantity and people's bone is inconsistent and the X light transmission is poor defective.

The utility model content:

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, and a kind of spinal column inserts is provided, and its intensity is high, wearability good, be easy to implant and with merge from the body bone, have the mechanical property that approaches with people's bone and good X light transmission.

The technical scheme that this utility model solves the problems of the technologies described above is as follows:

A kind of spinal column inserts, it comprises shell, horizontal through hole, vertical through hole, fixing threaded hole and positioning tooth, described horizontal through hole flatly connects described enclosure, described vertical through hole vertically connects described enclosure and connects with this horizontal through hole, described fixing threaded hole is positioned at an end of described shell and connects with horizontal through hole and vertical through hole, and described positioning tooth is arranged at upper surface and the lower surface of described shell.

Described shell adopts polyetheretherketonematerials materials to make, and it is rectangular-shaped or along the kidney piece shape of horizontal curvature.

Described positioning tooth is zigzag or triangle dentation.

Compare with existing spinal column inserts, the utlity model has following advantage:

1, rational in infrastructure, be easy to implant and with merges from the body bone---the utlity model has and form the through hole that cross connects, it is opening on four sides, can make plant bone mass successfully to spinal column inserts growth inside.

2, positioning performance is good---and the upper and lower surface of described spinal column inserts is provided with positioning tooth, and the profile of this positioning tooth easily is placed into inserts, and reduces displacement to greatest extent.

3, having and the near mechanical property of people's bone photo and good biocompatibility and chemical stability---this utility model adopts polyetheretherketonematerials materials to make; Polyether-ether-ketone (PEEK) material is the special engineered material that a kind of fusing point is high, modulus is high, intensity is high, processing characteristics is excellent, under the condition of various pressure, temperature, speed and relative roughness contact surface, all has excellent wear-resisting property, its mechanical property and people's bone approach, and therefore are conducive to the fusion of spinal column inserts and intervertebral disc; The PEEK material has good biocompatibility and stable chemical characteristic simultaneously, is conducive to the spinal column inserts and implants rear long-term stability in human body.

4, unstressed shielding has good X light transmission---and the spinal column inserts of PEEK material has remedied the stress protection of metal material and the shortcomings such as impermeability of lonizing radiation, thereby is convenient to operation technique, has improved operation efficient.

Description of drawings:

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the structural representation of another embodiment of this utility model.

Fig. 4 is the top view of Fig. 3.

The specific embodiment:

Below in conjunction with the drawings and specific embodiments this utility model is described in further detail, but can not limits with this protection domain of the present utility model.

Please in conjunction with consulting Fig. 1 and Fig. 2 structural representation of the present utility model, diagram spinal column inserts comprises shell 1, horizontal through hole 2, vertical through hole 3, fixing threaded hole 5 and positioning tooth 4.Described shell 1 adopts polyetheretherketonematerials materials to make, and it is rectangular-shaped.Described horizontal through hole 2 flatly connects the inside of described shell 1, described vertical through hole 3 vertically connects the inside of described shell 1, and forming cross with this horizontal through hole 2 connects, thereby described spinal column inserts forms the structure of four sides opening, can make plant bone mass successfully to spinal column inserts growth inside, reach and merge from body bone height.Described fixing threaded hole 5 is in order to fix this spinal column inserts, and it is positioned at an end of described shell 1 and connects with horizontal through hole 2 and vertical through hole 3.Described positioning tooth 4 is zigzag, and in order to prevent the slippage of spinal column inserts, it is arranged at upper surface and the lower surface of described shell 1, and the crown of this positioning tooth 4 is outward-dipping, so that the inserting of spinal column inserts.

Please in conjunction with the structural representation of consulting Fig. 3 and another embodiment of Fig. 4 this utility model, diagram spinal column inserts and example structure illustrated in figures 1 and 2 are basic identical again, and difference is that the shell 1 of the present embodiment is the kidney piece shape along horizontal curvature; In addition, described positioning tooth 4 is the triangle dentation.

This utility model is practical simple, on enter accurately, apparatus safety.By cell in vitro cultivate, the method such as animal body is implanted into measures indexs such as the cytotoxicity of material, cell proliferation rate, mutagenicity, adhesion, cell biological functions, proof PEEK has good biocompatibility and stable chemical characteristic, described spinal column inserts with PEEK as making material, has good mechanics biological property, and through hole and positioning tooth is rational in infrastructure, can with carry out height from the body bone and merge.Clinical proof this utility model can not make the vertebral body fracture after using, sink, caves in and angulation deformity, outstanding, can not make tissue produce pathologic dissolving, necrosis on every side, infect yet, and can avoid patient that the ill symptomses such as pain, infection, hematoma occur.

Claims

1. spinal column inserts, it is characterized in that: described spinal column inserts comprises shell, horizontal through hole, vertical through hole, fixing threaded hole and positioning tooth, described horizontal through hole flatly connects described enclosure, described vertical through hole vertically connects described enclosure and connects with this horizontal through hole, described fixing threaded hole is positioned at an end of described shell and connects with horizontal through hole and vertical through hole, and described positioning tooth is arranged at upper surface and the lower surface of described shell.

2. spinal column inserts according to claim 1 is characterized in that: described shell adopts polyetheretherketonematerials materials to make.

3. spinal column inserts according to claim 1 and 2, it is characterized in that: described shell is rectangular-shaped.

4. spinal column inserts according to claim 1 and 2 is characterized in that: described shell is the kidney piece shape along horizontal curvature.

5. spinal column inserts according to claim 1, it is characterized in that: described positioning tooth is zigzag.

6. spinal column inserts according to claim 1, it is characterized in that: described positioning tooth is the triangle dentation.