CN209360866U - A kind of inflatable pedicle screw - Google Patents
A kind of inflatable pedicle screw Download PDFInfo
- Publication number
- CN209360866U CN209360866U CN201822103947.1U CN201822103947U CN209360866U CN 209360866 U CN209360866 U CN 209360866U CN 201822103947 U CN201822103947 U CN 201822103947U CN 209360866 U CN209360866 U CN 209360866U
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- China
- Prior art keywords
- screw
- inflatable
- cap
- pedicle
- inflatable plug
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Abstract
The utility model belongs to the field of medical instrument technology, more particularly to a kind of inflatable pedicle screw, including screw, inflatable plug screw and stud, the screw is made of screw cap and the body of screw, circular through hole and U-shaped through slot there are two being set on screw cap, its circumference of lateral edge is equipped with gap outside the middle part of screw cap, internal screw thread is equipped in screw cap, the stud is located in screw cap, external screw thread is additionally provided on the outside of inflatable plug screw, retaining ring is equipped at the top of inflatable plug screw, the screw is flexibly connected with inflatable plug screw, the stud is flexibly connected with screw cap.The utility model uses the inflatable plug screw of the high molecular polythene material high with histocompatbility in the case where no change pedicle screw size itself and structure, it is covert to improve screw diameter, increase and bone tissue contact area, enhance screw holding power, the generation for phenomena such as improving resistance to plucking output capacity, avoiding the bone cement leakage that common pedicle screw CPS is be easy to cause.
Description
Technical field
The utility model belongs to the field of medical instrument technology, and in particular to a kind of inflatable pedicle screw.
Background technique
With the development of medicine, pedicle screw technique for fixing is had been greatly developed, and has been widely used for treating
The various backbone diseases such as backbone retrogression pathological changes, vertebral fracture, deformity, metastatic tumor of bone.At present for how to improve osteoporosis item
Pedicle screw stability is concentrated mainly on two aspects under part, first is that strengthening screw way, second is that improving screw designs.Traditional nail
Road intensifying method not can cooperate well the application of bone cement, need bone because of common pedicle screw CPS itself design reasons
After cement is placed in screw way, then it is screwed into pedicle screw, therefore the injection timing of bone cement, usage amount and disperse situation are often difficult to
It holds, thus the risks such as bone cement dura mater external leakage damage spinal cord, nerve root are higher, therefore clinical expansion is by certain limit
System.And existing expanding screw for pedicle of vertebral arch (EPS) is hollow structure, traditional spiral shell is not achieved in mechanical strength and fatigue resistance
Follow closely to obtain intensity.
Utility model content
The utility model provides a kind of inflatable pedicle screw regarding to the issue above.
The utility model uses following technical scheme in order to achieve the above objectives:
A kind of inflatable pedicle screw, including screw, inflatable plug screw and stud, the screw is by screw cap and screw
Body composition, sets on screw cap there are two circular through hole and U-shaped through slot, the setting direction of two circular through holes and U-shaped through slot
Setting direction is orthogonal, its circumference of lateral edge is equipped with gap outside the middle part of screw cap, and internal screw thread is equipped in screw cap, described
Stud is located in screw cap, and the body of screw is solid construction, and the screw thread on the body of screw is divided into proximal threads and distal threads two parts,
Proximal threads are quadruple thread, screw pitch 1.35mm, screw thread depth 1.65mm；Distal threads are double thread, screw pitch 2.70mm, screw thread
Deep 1.55mm；The inflatable plug screw is hollow design, and wall thickness 2mm is additionally provided with external screw thread on the outside of inflatable plug screw,
Screw pitch is 2.85mm, and screw thread depth is 1.60mm, is equipped with retaining ring at the top of inflatable plug screw, the screw and inflatable plug screw are living
Dynamic connection, the stud are flexibly connected with screw cap.
Further, the inflatable plug screw is identical as the length of screw, is 30-50mm.
Further, the diameter of the inflatable plug screw and the body of screw is divided into tri- kinds of 4.0mm, 4.5mm, 5.0mm.
Further, the inflatable plug screw is made of high molecular polythene material.
Further, the screw is made of medical titanium alloy material.
The utility model has the advantage that compared with prior art
1, it is high to may expand the high molecular polythene material structure compatibility that plug screw uses for the utility model；
2, the utility model is applicable to various Thoracolumbar disk disease pedicle nail implantation surgeries, is particularly suitable for osteoporosis
Patient；
3, the utility model utilizes the enhancing of the excellent compatibility of high molecular polythene material and bone tissue and bone tissue
Fusion rate, strengthen the contact surface of inflatable plug screw and bone tissue, forming screw-may expand the contact mode of plug screw-bone tissue,
Bone-nail contact area is greatly improved, screw withdrawal resistance is improved；
4, the utility model does not change pedicle screw size itself, screw non-hollow structure, mechanical strength and resists tired
Labor intensity can achieve conventional screw intensity；
5, the utility model utilizes the swollen plug principle of mechanical swelling, enhances screw holding power, improves resistance to plucking output capacity.
6, the utility model can avoid the generation of phenomena such as bone cement leakage；
7, the utility model in a disguised form improves screw diameter, increase and bone tissue contact area, prevents using swollen plug principle is expanded
Only screw loosening and exit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of the utility model screw；
Fig. 3 is the structural schematic diagram that the utility model may expand plug screw.
Wherein 102, two screw -1, inflatable plug screw -2, stud -3, screw cap -101, the body of screw-circles are logical
Hole -103, U-shaped through slot -104, gap -105, retaining ring -201.
Specific embodiment
In order to which the technical solution of the utility model is further described, with reference to the accompanying drawings and embodiments to the utility model into
Row further illustrates.
Embodiment 1
Such as Fig. 1, Fig. 2, shown in Fig. 3, a kind of inflatable pedicle screw, it is characterised in that: including screw 1, inflatable spiral shell
Plug 2 and stud 3, the screw 1 are made of titanium alloy medical material, are divided into screw cap 101 and the body of screw 102, in screw cap 101
On set the setting of the setting direction of two circular through holes 103 and U-shaped through slot 104 there are two circular through hole 103 and U-shaped through slot 104
Direction is orthogonal, its circumference of lateral edge is equipped with gap 105 outside the middle part of screw cap 101, and interior spiral shell is equipped in screw cap 101
Line, the body of screw 102 are solid construction, length 30mm, diameter 4.0mm, the screw thread on the body of screw 102 be divided into proximal threads and
Distal threads two parts, proximal threads are quadruple thread, screw pitch 1.35mm, screw thread depth 1.65mm；Distal threads are double thread,
Screw pitch 2.70mm, screw thread depth 1.55mm；The inflatable plug screw 2 is hollow design, wall thickness 2mm, by high molecular polythene material
Material is made, and the length that may expand plug screw 2 is 30mm, diameter 4.0mm.It is additionally provided with external screw thread in the outside of inflatable plug screw 2,
Screw pitch is 2.85mm, and screw thread depth is 1.60mm, is equipped with retaining ring 201 at the top of inflatable plug screw 2, the screw 1 with it is inflatable
Plug screw 2 is flexibly connected, and the stud 3 is flexibly connected with screw cap 101.
Embodiment 2
As shown in Figure 1, Figure 2, shown in Fig. 3, a kind of inflatable pedicle screw, it is characterised in that: including screw 1, inflatable spiral shell
Plug 2 and stud 3, the screw 1 are made of titanium alloy medical material, are divided into screw cap 101 and the body of screw 102, in screw cap 101
On set the setting of the setting direction of two circular through holes 103 and U-shaped through slot 104 there are two circular through hole 103 and U-shaped through slot 104
Direction is orthogonal, its circumference of lateral edge is equipped with gap 105 outside the middle part of screw cap 101, and interior spiral shell is equipped in screw cap 101
Line, the body of screw 102 are solid construction, length 40mm, diameter 4.5mm, the screw thread on the body of screw 102 be divided into proximal threads and
Distal threads two parts, proximal threads are quadruple thread, screw pitch 1.35mm, screw thread depth 1.65mm；Distal threads are double thread,
Screw pitch 2.70mm, screw thread depth 1.55mm；The inflatable plug screw 2 is hollow design, wall thickness 2mm, by high molecular polythene material
Material is made, and the length that may expand plug screw 2 is 40mm, diameter 4.5mm.It is additionally provided with external screw thread in the outside of inflatable plug screw 2,
Screw pitch is 2.85mm, and screw thread depth is 1.60mm, is equipped with retaining ring 201 at the top of inflatable plug screw 2, the screw 1 with it is inflatable
Plug screw 2 is flexibly connected, and the stud 3 is flexibly connected with screw cap 101.
Embodiment 3
As shown in Figure 1, Figure 2, shown in Fig. 3, a kind of inflatable pedicle screw, it is characterised in that: including screw 1, inflatable spiral shell
Plug 2 and stud 3, the screw 1 are made of titanium alloy medical material, are divided into screw cap 101 and the body of screw 102, in screw cap 101
On set the setting of the setting direction of two circular through holes 103 and U-shaped through slot 104 there are two circular through hole 103 and U-shaped through slot 104
Direction is orthogonal, its circumference of lateral edge is equipped with gap 105 outside the middle part of screw cap 101, and interior spiral shell is equipped in screw cap 101
Line, the body of screw 102 are solid construction, length 50mm, diameter 5.0mm, the screw thread on the body of screw 102 be divided into proximal threads and
Distal threads two parts, proximal threads are quadruple thread, screw pitch 1.35mm, screw thread depth 1.65mm；Distal threads are double thread,
Screw pitch 2.70mm, screw thread depth 1.55mm；The inflatable plug screw 2 is hollow design, wall thickness 2mm, by high molecular polythene material
Material is made, and the length that may expand plug screw 2 is 50mm, diameter 5.0mm.It is additionally provided with external screw thread in the outside of inflatable plug screw 2,
Screw pitch is 2.85mm, and screw thread depth is 1.60mm, is equipped with retaining ring 201 at the top of inflatable plug screw 2, the screw 1 with it is inflatable
Plug screw 2 is flexibly connected, and the stud 3 is flexibly connected with screw cap 101.
Specifically used step:
1, properly inflatable plug screw 2 is chosen according to centrum, inflatable plug screw 2 is screwed into vertebra along centrum pedicle of vertebral arch with tool
In body, until inflatable 2 tail end of plug screw and pedicle of vertebral arch planes align.
2, same diameter Titanium Alloy Screw 1 is chosen to be screwed into along inflatable plug screw 2, until its 101 lower edge of screw cap with can be swollen
Swollen plug screw 2 flushes.
Claims (5)
1. a kind of inflatable pedicle screw, it is characterised in that: described including screw (1), inflatable plug screw (2) and stud (3)
Screw (1) is made of screw cap (101) and the body of screw (102), is set on screw cap (101) there are two circular through hole (103) and U
Type through slot (104), the setting direction of two circular through holes (103) and the setting direction of U-shaped through slot (104) are orthogonal, in spiral shell
Its circumference of lateral edge is equipped with gap (105) outside the middle part of the head of a nail (101), and internal screw thread, the body of screw are equipped in screw cap (101)
It (102) is solid construction, the screw thread on the body of screw (102) is divided into proximal threads and distal threads two parts, proximal threads four
Line screw thread, screw pitch 1.35mm, screw thread depth 1.65mm；Distal threads are double thread, screw pitch 2.70mm, screw thread depth 1.55mm；Institute
Stating inflatable plug screw (2) is hollow design, and wall thickness 2mm is additionally provided with external screw thread, screw pitch on the outside of inflatable plug screw (2)
For 2.85mm, screw thread depth is 1.60mm, is equipped with retaining ring (201) at the top of inflatable plug screw (2), the screw (1) with can be swollen
Swollen plug screw (2) is flexibly connected, the stud (3) and screw cap (101) active link.
2. a kind of inflatable pedicle screw according to claim 1, it is characterised in that: the inflatable plug screw (2) with
The length of the body of screw (102) is identical, is 30-50mm.
3. a kind of inflatable pedicle screw according to claim 2, it is characterised in that: the inflatable plug screw (2) with
The diameter of the body of screw (102) is divided into tri- kinds of 4.0mm, 4.5mm, 5.0mm.
4. a kind of inflatable pedicle screw according to claim 1, it is characterised in that: the inflatable plug screw (2) by
High molecular polythene material is made.
5. a kind of inflatable pedicle screw according to claim 1, it is characterised in that: the screw (1) is by medical titanium
Alloy material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822103947.1U CN209360866U (en) | 2018-12-14 | 2018-12-14 | A kind of inflatable pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822103947.1U CN209360866U (en) | 2018-12-14 | 2018-12-14 | A kind of inflatable pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209360866U true CN209360866U (en) | 2019-09-10 |
Family
ID=67832856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822103947.1U Expired - Fee Related CN209360866U (en) | 2018-12-14 | 2018-12-14 | A kind of inflatable pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209360866U (en) |
-
2018
- 2018-12-14 CN CN201822103947.1U patent/CN209360866U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190910 Termination date: 20211214 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |