CN207679519U - A kind of ilium screw assembly - Google Patents
A kind of ilium screw assembly Download PDFInfo
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- CN207679519U CN207679519U CN201720744153.6U CN201720744153U CN207679519U CN 207679519 U CN207679519 U CN 207679519U CN 201720744153 U CN201720744153 U CN 201720744153U CN 207679519 U CN207679519 U CN 207679519U
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- rivet nut
- screw
- ilium
- nail
- inner screw
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Abstract
The utility model belongs to the field of medical instrument technology, and in particular to a kind of ilium screw assembly, including rivet nut, the head of a nail and connector, the rivet nut are connect with the head of a nail by interconnecting piece, and the surface of rivet nut is coated with bone induction material layer；Interconnecting piece is connect by screw thread with connector；The front and back sides of connector are equipped with the spherical card slot of the universal ball end for accommodating backbone stick end；Rivet nut is solenoid structure, has an inner screw inside rivet nut；Inner screw surface has Elastic Teeth, it is stitched equipped with screw thread on the surface of rivet nut, Elastic Teeth can stitch prominent rivet nut surface by screw thread, screw thread is formed on rivet nut surface, to which rivet nut and inner screw collectively constitute rotatable screw, there is the bottom gap moved up and down for inner screw between inner screw and rivet nut bottom surface.When the inner screw of ilium screw assembly moves down, rivet nut becomes do not have threaded screw rod so as to be taken out conveniently, and will not carry out secondary destruction to periphery bone, reduces pain when patient takes out ilium nail.
Description
Technical field
The utility model belongs to the field of medical instrument technology, and in particular to a kind of ilium screw assembly.
Background technology
Waist sacrum pelvis technique for fixing is always that spinal surgery neck waist sacrum pelvis technique for fixing is always field of spinal surgery
Research hotspot and difficult point, in terms of how improving interior fixed stability and fusion rate.At treatment lumbosacral spine position
Because tuberculosis, the destruction of tumour and senile osteoporosis need to carry out the removing of lesion with vertebra degenerative disorders etc., reset and in
The fixed most spinal surgeons of aspect follow closely joint nail pedicle fix method using ilium.Biomechanics Research shows：Ilium is followed closely
There is the biomechanical advantage of stability between maintaining waist sacrum pelvis with waist sacrum pedicle screw interconnection technique, this technology is in waist sacrum bone
The fixed stability of basin is best, and the mobility under various motion states significantly reduces.
Ilium follows closely joint nail pedicle fix method：Spinal rod and Duo Gen pedicle nails and an ilium nail are provided,
More pedicle nails are arranged along the extending direction of spinal rod, and one end of every pedicle nail is connected to spinal rod by connector,
The other end is screwed into lumbar vertebra, and ilium follows closely one end and is connected to spinal rod by connector, and the other end is screwed into ilium, and then realizes solid
It is fixed.
There is external screw thread, the head of rivet nut to be equipped with connector, connector is used in the bar portion of the rivet nut of existing ilium nail
Connect spinal rod.The ilium of this traditional structure is followed closely, and rivet nut is screwed into ilium, and the biocompatibility between rivet nut and ilium is poor,
It is difficult to and combines closely, be easy to loosen, and then feeling of pain is caused to human body, furthermore, it is possible to cause infection.
Chinese patent CN201620054923.X discloses a kind of ilium nail with bone induction material coating and vertebra is solid
Determine device, including rivet nut and connector, rivet nut includes the head of one end of bar portion and bar portion, and the surface of the bar portion has at least
There is external screw thread, the externally threaded surface to be coated with bone induction material layer on a part of surface；Connector is to by the head
It is connected and fixed with spinal rod.It is coated with bone induction material on the external screw thread in the ilium nail rod portion, bone induction material can be utilized
Bioactivity excites the ability of ostosis, promotes bone tissue growth healing, can to form close knot between rivet nut and sclerotin
It closes, it is ensured that its reliability connected overcomes the defect that existing ilium nail biocompatibility is poor, easily loosens, but same
Also new problem is brought.After surgery, rivet nut will stay for some time in vivo, with the generation of bone, rivet nut meeting and bone
It grows together, can carry out secondary destruction to periphery bone when rivet nut will be taken out, larger pain is caused to patient, is also unfavorable for bone
The quick healing of bone.
In view of problem above, design one kind is needed easily and fast to take out, does not damage the ilium nail of periphery bone, there is weight
The application value wanted.
Utility model content
Take out difficult to solve ilium in the prior art nail, when taking-up can carry out periphery bone secondary destruction, right
Patient causes larger pain, is unfavorable for the defect of bone quickly to heal, and the utility model provides a kind of ilium screw assembly.This
Utility model technical problems to be solved are achieved through the following technical solutions：
A kind of ilium screw assembly, including rivet nut, the head of a nail and connector pass through connection between the top and the head of a nail of the rivet nut
Portion is fixedly connected, and the surface of the rivet nut is coated with bone induction material layer；
The connection surface has screw thread, is connect with connector by the screw thread；
The connector is the fillet oblong-shaped with circular through hole, is had and connection surface on the wall of endoporus
Screw thread is equipped with spherical card slot to matched threaded area, the front and back sides of the connector, and the spherical shape card slot is for accommodating ridge
The universal ball end of column stick end；
The rivet nut is the solenoid structure of inner hollow, has an inner screw, the rivet nut and interior spiral shell inside the rivet nut
The center line of bar is coaxial；
The inner screw surface has Elastic Teeth, and the elasticity odontoid is acclivitous obtuse triangle, the nail
The surface of body is stitched equipped with screw thread, and the screw thread seam and the matching size of the Elastic Teeth close so that Elastic Teeth can pass through screw thread
Seam prominent rivet nut surface forms screw thread, to which rivet nut and inner screw collectively constitute rotatable screw on rivet nut surface；
The bottom end of the rivet nut is the rivet nut bottom surface of " V " font, is had between the inner screw and the inner surface of rivet nut bottom surface
There are the bottom gap moved up and down for the inner screw, when the inner screw is moved down along the bottom gap, Elastic Teeth quilt
It is pressed into the inner wall of rivet nut, to make rivet nut become do not have threaded screw rod.
Further, in ilium screw assembly described in the utility model, the head of a nail is the hollow structure with through-hole, institute
The top surface for stating inner screw is contacted with the bottom surface of the through-hole, and inner screw top surface outer diameter is more than the outer diameter of the through-hole, with
The top of the inner screw is set not enter in the through-hole.
Further, in ilium screw assembly described in the utility model, the top surface of the head of a nail is equipped with the nail of interior six side
Cap spiral shell cutter groove, for installing ilium nail；The top surface of the inner screw is equipped with criss-cross inner screw spiral shell cutter groove, in controlling
Screw rod moves up and down in rivet nut.
Further, in ilium screw assembly described in the utility model, match for small―gap suture between the rivet nut and inner screw
It closes.
Further, in ilium screw assembly described in the utility model, the bone induction material layer be hydroxyapatite and/
Or magnesium metal.
Further, in ilium screw assembly described in the utility model, the head of a nail is hexagon or octagon.
Further, in ilium screw assembly described in the utility model, the rivet nut and inner screw are by titanium alloy system
At.
The beneficial effects of the utility model：
1, in ilium screw assembly described in the utility model, the Elastic Teeth on inner screw surface and the screw thread on rivet nut surface stitch phase
Cooperation, Elastic Teeth can stitch prominent rivet nut surface by screw thread, screw thread be formed on rivet nut surface, to which rivet nut and inner screw are common
Rotatable screw is formed, when inner screw is moved down along bottom gap, Elastic Teeth is pressed into the inner wall of rivet nut, to make
Rivet nut becomes do not have threaded screw rod, after bone recovery, it may be convenient to ilium screw assembly is taken out, without because of rivet nut
It grows together with bone, secondary destruction is carried out to periphery bone, larger pain is caused to patient；It is small between rivet nut and inner screw
Clearance fit, more convenient inner screw are moved up and down along bottom gap.
2, in ilium screw assembly described in the utility model, the surface of rivet nut is coated with bone induction material layer, self-bone grafting material
The bioactivity of material excites the ability of ostosis, promotes bone tissue growth healing, and can be formed between rivet nut and sclerotin
It combines closely, it is ensured that on the other hand its reliability connected coats bone induction material, can directly be connect to avoid rivet nut and sclerotin
The problems such as touching, avoiding the occurrence of infection.
3, in ilium screw assembly described in the utility model, the front and back sides of connector are equipped with spherical card slot, spherical clip
Slot is used to accommodate the universal ball end of backbone stick end, and the flexible connection coordinated using spherical card slot and bulb can be changed with stress
Angle positions, and the shearing force that ilium nail angle is born is eased, and avoids the conventional ilium nail being fixedly connected and spinal rod is easy
The problem of causing the fracture of ilium nail, ilium damage.
4, in ilium screw assembly described in the utility model, the top surface of nut is equipped with the head of a nail spiral shell cutter groove of interior six side, just
In installation ilium nail；The top surface of inner screw be equipped with criss-cross inner screw spiral shell cutter groove, convenient for control inner screw in rivet nut on
Lower movement.
The utility model is described in further details below with reference to accompanying drawings and embodiments.
Description of the drawings
Fig. 1 is the overall structure profile of the ilium screw assembly of the utility model.
Fig. 2 is the structural schematic diagram of the ilium nail and inner screw in the ilium screw assembly of the utility model.
Fig. 3 is the structural schematic diagram of the connector in the ilium screw assembly of the utility model.
Fig. 4 is the vertical view of the ilium screw assembly of the utility model.
In figure：1- rivet nuts, 11- screw threads seam, 12- rivet nuts bottom surface, 13- bottom gaps；The 2- heads of a nail, 21- through-holes, the 22- heads of a nail
Spiral shell cutter groove；3- interconnecting pieces；4- inner screws, 41- Elastic Teeths, 42- inner screw spiral shell cutter grooves；5- connectors；51- spherical shape card slots.
Specific implementation mode
Reach the technological means and effect that predetermined purpose is taken for the utility model is expanded on further, below in conjunction with attached drawing
And embodiment, to specific embodiment of the present utility model, structure feature and its effect, detailed description are as follows.
Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that term "center", "upper", "lower", "left", "right" are " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", " top surface ", " bottom surface ", "inner", "outside" is orientation based on ... shown in the drawings
Or position relationship, be merely for convenience of describing the present invention and simplifying the description, do not indicate or imply the indicated device or
Element must have a particular orientation, with specific azimuth configuration and operation, therefore should not be understood as the limit to the utility model
System.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, can also be electrical connection；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, it can understand above-mentioned art with concrete condition
The concrete meaning of language in the present invention.
Embodiment 1：
In order to solve it is in the prior art overcome the existing generation with bone, rivet nut can grow together with bone,
Secondary destruction can be carried out to periphery bone, larger pain is caused to patient, is also unfavorable for the quick of bone when rivet nut will be taken out
The defect of healing present embodiments provides a kind of ilium screw assembly as shown in Figure 1 to 4, including rivet nut 1, the head of a nail 2 and connection
Device 5 is fixedly connected between the top and the head of a nail 2 of rivet nut 1 by interconnecting piece 3.The surface of rivet nut 1 is coated with bone induction material layer,
Bone induction material layer is hydroxyapatite and/or magnesium metal.
Hydroxyapatite (hydroxyapatit, HA) is a kind of bioceramic material of nonabsorable, and molecular formula is Ca10
(PO4)6(OH)2, chemical composition and natural bone tissue, tooth are close, and therefore, it has the biocompatibility of height and without life
Object toxicity, nonirritant, no sensitization, non-carcinogenesis.Hydroxyapatite has good bone guided power, can be with inside of human body group
It is woven in formation topochemistry keyness bonding on interface, hydroxyapatite passes through the friendship with the sclerotin of surrounding progress calcium, phosphonium ion
It changes and reaches complete integration, new bone and hydroxyapatite exist on interface without fibrous connective tissue, and bond strength is very high, base
In above-mentioned plurality of advantages, using hydroxyapatite as bone induction material, the ability of ostosis can be excited, bone tissue growth is promoted to be cured
It closes, and can be formed between rivet nut and sclerotin and combine closely, it is ensured that its reliability connected.
Magnesium is human essential elements, participates in important metabolic activity, closely as a kind of extensive metal material of materials
Research over year has shown that it has good biocompatibility, can be absorbed by the body, and excessive magnesium can be excreted by urine,
With higher safety.Magnesium metal also has good self-bone grafting ability, therefore, using magnesium as bone induction material, due to magnesium
The magnesium ion that alloy discharges in degradation process and the alkaline environment formed around it, can cause in magnesium alloy surrounding tissue
The increase of bone morphogenetic protein (BMP-2), and then the differentiation of pluripotency mesenchymal cell, growth are stimulated, cause local new
Ostosis is combined closely it is also possible that being formed between rivet nut and sclerotin in turn, it is ensured that its reliability connected.
The surface of rivet nut is coated with bone induction material layer, and the bioactivity of bone induction material excites the ability of ostosis, promotees
It heals into bone tissue growth, and can be formed between rivet nut and sclerotin and combine closely, it is ensured that its reliability connected, it is another
Aspect coats bone induction material, the problems such as being in direct contact to avoid rivet nut and sclerotin, avoid the occurrence of infection.
3 surface of interconnecting piece has screw thread, is connect with connector 5 by the screw thread.The structure of connector 5 is as shown in figure 3, be
Fillet oblong-shaped with circular through hole has on the wall of endoporus with the screw thread on 3 surface of interconnecting piece to matched threaded area,
The front and back sides of connector 5 are equipped with spherical card slot 51, and spherical card slot 51 is used to accommodate the universal ball end of backbone stick end.
Ilium is the part one of larger as load-bearing in human body, so, the larger pressure received, corresponding, ilium
Nail is when being fixed in ilium, also can by larger pressure, traditional ilium nail and spinal rod be fixedly connected and cannot be movable,
Then there is stress concentration in water, and ilium is led to problems such as to damage, and in the present embodiment, ilium nail is connect with spinal rod by connector,
The flexible connection of spherical card slot and bulb cooperation is specifically used, angle positioning can be changed with stress, what ilium nail angle was born cuts
Shear force is eased, and avoids the conventional ilium nail being fixedly connected and spinal rod easily causes the fracture of ilium nail, ilium damages
Problem.
As shown in Fig. 2, rivet nut 1 is the solenoid structure of inner hollow, the inside of rivet nut 1 has an inner screw 4, rivet nut 1 and interior
The center line of screw rod 4 is coaxial；It is acclivitous obtuse triangle that 4 surface of inner screw, which has Elastic Teeth 41,41 shape of Elastic Teeth,
The surface of rivet nut 1 is equipped with screw thread and stitches 11, and screw thread seam 11 and the matching size of Elastic Teeth 41 close so that Elastic Teeth 41 can pass through spiral shell
Line seam 11 protrudes 1 surface of rivet nut, screw thread is formed on 1 surface of rivet nut, to which rivet nut 1 and inner screw 4 collectively constitute rotatable spiral shell
Nail.The bottom end of rivet nut 1 is the rivet nut bottom surface 12 of " V " font, between inner screw 4 and the inner surface of rivet nut bottom surface 12, is had in supplying
The bottom gap 13 that screw rod 4 moves up and down, when inner screw 4 is moved down along bottom gap 13, Elastic Teeth 41 is pressed into rivet nut 1
In inner wall, to make rivet nut 1 become do not have threaded screw rod.
When installation, using spiral shell knife by inner screw to moving up, Elastic Teeth protrudes rivet nut surface and forms screw thread, is fixed on ilium
In；After bone recovery, inner screw can be moved down with spiral shell knife, Elastic Teeth is pressed into the inner wall of rivet nut, and rivet nut is made to become not having
Threaded screw rod, so as to be taken out conveniently ilium screw assembly.This design reduces user when taking out ilium nail
Pain, will not grow together because of rivet nut and bone, inconvenience is taken out, and is carried out secondary destruction to periphery bone, is caused to patient
Larger pain；Coordinate for small―gap suture between rivet nut and inner screw, more convenient inner screw is moved up and down along bottom gap.
As shown in figure 4, the head of a nail 2 is hexagon or octagon in ilium screw assembly, it is octagon, the head of a nail 2 in the present embodiment
Top surface for the hollow structure with through-hole 21, inner screw 4 is contacted with the bottom surface of through-hole 21, and the top surface outer diameter of inner screw 4 is big
In the outer diameter of through-hole 4, so that the top of inner screw 4 will not enter in through-hole 21.The top surface of the head of a nail 2 is equipped with the head of a nail of interior six side
Spiral shell cutter groove 22, for installing ilium nail；The top surface of inner screw 4 is equipped with criss-cross inner screw spiral shell cutter groove 42, in controlling
Screw rod 4 moves up and down in rivet nut 1.
Rivet nut 1 and inner screw 4 are made of titanium alloy in ilium screw assembly.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is confined to these explanations.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the scope of protection of the utility model.
Claims (7)
1. a kind of ilium screw assembly, including rivet nut (1), the head of a nail (2) and connector (5), the top of the rivet nut (1) and the head of a nail
(2) it is fixedly connected by interconnecting piece (3) between, the surface of the rivet nut (1) is coated with bone induction material layer；It is characterized in that,
Interconnecting piece (3) surface has screw thread, is connect with connector (5) by the screw thread；
The connector (5) is the fillet oblong-shaped with circular through hole, is had and interconnecting piece (3) surface on the wall of endoporus
Screw thread to matched threaded area, the front and back sides of the connector (5) are equipped with spherical card slot (51), the spherical shape card slot
(51) it is used to accommodate the universal ball end of backbone stick end；
The rivet nut (1) is the solenoid structure of inner hollow, has an inner screw (4), the rivet nut inside the rivet nut (1)
(1) and the center line of inner screw (4) is coaxial；
It is acclivitous obtuse triangle that inner screw (4) surface, which has Elastic Teeth (41), Elastic Teeth (41) shape,
The surface of the rivet nut (1) is equipped with screw thread and stitches (11), and the screw thread seam (11) and the matching size of the Elastic Teeth (41) close, and make
(11) protrusion rivet nut (1) surface can be stitched by screw thread by obtaining Elastic Teeth (41), screw thread be formed on rivet nut (1) surface, to rivet nut
(1) and inner screw (4) collectively constitutes rotatable screw；
The bottom end of the rivet nut (1) is the rivet nut bottom surface (12) of " V " font, and the inner screw (4) is interior with rivet nut bottom surface (12)
There is the bottom gap (13) moved up and down for the inner screw (4), the inner screw (4) is along the bottom gap between surface
(13) when moving down, Elastic Teeth (41) is pressed into the inner wall of rivet nut (1), to make rivet nut (1) become do not have threaded spiral shell
Bar.
2. ilium screw assembly according to claim 1, which is characterized in that the head of a nail (2) is in through-hole (21)
The top surface of hollow structure, the inner screw (4) is contacted with the bottom surface of the through-hole (21), and the top surface outer diameter of the inner screw (4)
More than the outer diameter of the through-hole (21), so that the top of the inner screw (4) will not enter in the through-hole (21).
3. ilium screw assembly according to claim 2, which is characterized in that the top surface of the head of a nail (2) is equipped with interior six side
Head of a nail spiral shell cutter groove (22), for install ilium nail；The top surface of the inner screw (4) is equipped with criss-cross inner screw spiral shell cutter groove
(42), it is moved up and down in rivet nut (1) for controlling inner screw (4).
4. ilium screw assembly according to claim 1, which is characterized in that be small between the rivet nut (1) and inner screw (4)
Clearance fit.
5. ilium screw assembly according to claim 1, which is characterized in that the bone induction material layer is hydroxyapatite
And/or magnesium metal.
6. according to Claims 1 to 5 any one of them ilium screw assembly, which is characterized in that the head of a nail (2) be hexagon or
Octagon.
7. according to Claims 1 to 5 any one of them ilium screw assembly, which is characterized in that the rivet nut (1) and inner screw
(4) it is made of titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720744153.6U CN207679519U (en) | 2017-06-23 | 2017-06-23 | A kind of ilium screw assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720744153.6U CN207679519U (en) | 2017-06-23 | 2017-06-23 | A kind of ilium screw assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207679519U true CN207679519U (en) | 2018-08-03 |
Family
ID=62987653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720744153.6U Expired - Fee Related CN207679519U (en) | 2017-06-23 | 2017-06-23 | A kind of ilium screw assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207679519U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109567983A (en) * | 2018-11-28 | 2019-04-05 | 北京航空航天大学 | Horn-like implantation material and its method for implantation |
| CN110680491A (en) * | 2019-09-29 | 2020-01-14 | 北京市春立正达医疗器械股份有限公司 | Adjustment device for adjusting the spacing between adjacent bones |
| CN111603234A (en) * | 2020-05-23 | 2020-09-01 | 徐州长风生物科技有限公司 | High-holding-force anti-back bone screw |
| CN111616785A (en) * | 2020-05-23 | 2020-09-04 | 徐州长风生物科技有限公司 | Bone screw capable of preventing retreat and slowly releasing nutrient solution |
-
2017
- 2017-06-23 CN CN201720744153.6U patent/CN207679519U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109567983A (en) * | 2018-11-28 | 2019-04-05 | 北京航空航天大学 | Horn-like implantation material and its method for implantation |
| CN110680491A (en) * | 2019-09-29 | 2020-01-14 | 北京市春立正达医疗器械股份有限公司 | Adjustment device for adjusting the spacing between adjacent bones |
| CN111603234A (en) * | 2020-05-23 | 2020-09-01 | 徐州长风生物科技有限公司 | High-holding-force anti-back bone screw |
| CN111616785A (en) * | 2020-05-23 | 2020-09-04 | 徐州长风生物科技有限公司 | Bone screw capable of preventing retreat and slowly releasing nutrient solution |
| CN111616785B (en) * | 2020-05-23 | 2022-01-28 | 暨南大学 | Bone screw capable of preventing retreat and slowly releasing nutrient solution |
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Granted publication date: 20180803 Termination date: 20190623 |