CN203017070U - Lumbosacral anterior approach steel plate fixing device - Google Patents
Lumbosacral anterior approach steel plate fixing device Download PDFInfo
- Publication number
- CN203017070U CN203017070U CN 201220706749 CN201220706749U CN203017070U CN 203017070 U CN203017070 U CN 203017070U CN 201220706749 CN201220706749 CN 201220706749 CN 201220706749 U CN201220706749 U CN 201220706749U CN 203017070 U CN203017070 U CN 203017070U
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- lock nut
- steel plate
- screw
- screw hole
- aperture
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Abstract
The utility model provides a lumbosacral anterior approach steel plate fixing device. The lumbosacral anterior approach steel plate fixing device comprises a steel plate and screws, wherein screw holes are formed in the steel plate, and screw heads of the screws can be contained in the screw holes. The lumbosacral anterior approach steel plate fixing device is characterized by further comprising locking nuts, wherein the locking nuts which are adjacent to the screw holes are arranged in the steel plate, and the locking nuts can be maintained in locking nut holes in a rotatable mode. Concave surface parts and convex surface parts are arranged along the periphery of the locking nuts. In locking nut first rotating positions in which the concave surface parts of the locking nuts face the screw holes, the locking nuts do not block the screw holes; while in locking nut second rotating positions in which the convex surface parts of the locking nuts face the screw holes, the convex surface parts can press the screw heads of the screws located in the screw holes. According the technical scheme of the lumbosacral anterior approach steel plate fixing device, operation steps can be simplified, the operation operating difficulty is lowered, and the complete set of the lumbosacral anterior approach steel plate fixing device is enabled to be compact in structure.
Description
Technical field
This utility model relates to the fixation implant in medical instruments field, and it is applied to the operation of orthopaedics spinal treatments.Particularly, this utility model relates to waist sacrum anterior plate fixture.
Background technology
The human spine links up vertebra and the organic whole structure that consists of, and vertebra comprises 7 cervical vertebras, 12 thoracic vertebras, 5 lumbar vertebras, 5 sacrals and 4 caudal vertebras.Be easy to fracture between the 5th lumbar vertebra and the 1st sacral, dislocation, pleurapophysis.If fracture, dislocation, pleurapophysis, should in time fix to recover its normal physiological state and stability.Over past ten years, common fixing means has: way of escape sacrum rod is fixed, lag screw is fixed, anterior plate is fixed etc.
Way of escape sacrum rod fixedly requires the bilateral posterior superior iliac spine intact, and excessively pressurization may damage sacral nerves, thereby it can not be used for the bilateral sacroiliac dislocation.
Lag screw fixedly requires sacroiliac joint to reset fully, and it is high that surgical condition requires, and needs perspective repeatedly in art, as it is improper to put the nail position, can cause blood vessel or nerve injury.
The fixing advantage of anterior plate has: 1. anterior plate is fixing safer, firm, simple, but anatomical reduction, reduce the destruction of sacroiliac joint posterior soft tissues, reduce the generation of wound infection and flap necrosis, be beneficial to simultaneously and through ilium groin approach, homonymy acetabular anterior column or antetheca fracture and fracture of pubis resetted interior fixingly, improved surgical effect.2. be beneficial to through front road the detecting of life-threatening abdominal injury, simultaneously pelvic ring carried out anatomical reduction and fixing.3. complete under direct-view and reset fixingly, can reduce the complication such as neural blood vessel damage.4. in fixing can only short-term keep reset fixing, the Healing strength that relies on local damage steady in a long-term, adopt the sacroiliac joint bone-graft fusion can reach permanent stable, solve the problems such as fracture redisplacement and sacroiliac joint shakiness, and can avoid the generation of sacroiliac joint traumatic arthritis.5. front road otch appears convenient, and complication is less, and is beneficial to the processing of associated injury.
At present, waist sacrum anterior plate fixed system is comprised of steel plate and screw substantially.In order to prevent moving back nail after the screw placement human body, the various pin structures that move back have been designed in prior art.For example, existing a kind of product of hot DIS is exactly that steel plate and screw are passed through screw-threaded coupling, and the shortcoming of this design is that stress shielding is arranged.Existing a kind of product of Medtronic Inc. is to increase by a block pressur plate, screw is pushed down, then with lock-screw, pressing plate and steel plate are fixed together in addition, the shortcoming of this design is complex operation, difficulty is large, and because of when pressing plate is installed, pressing plate is easy to slip in human body.In addition, Chinese patent literature CN201055419Y and CN202184786U also disclose some relevant fixtures.
The utility model content
In view of the defective of prior art, the purpose of this utility model is to develop a kind of waist sacrum anterior plate fixture, and it can simplify operating procedure, reduces the operation technique difficulty, and can make the package unit compact conformation.
According to this utility model, a kind of waist sacrum anterior plate fixture is provided, comprise steel plate and screw, be provided with screw hole in wherein said steel plate, the screw head of described screw can be contained in described screw hole,
It is characterized in that,
Described waist sacrum anterior plate fixture also comprises lock nut, be adjacent to be provided with locking cap opening with described screw hole in described steel plate, described lock nut rotatably remains in described locking cap opening, described lock nut has concave surface section and convex surface part along its periphery, wherein in the concave surface section of described lock nut in the face of in lock nut first position of rotation of described screw hole, described lock nut does not block described screw hole, and in the convex surface part of described lock nut was faced lock nut second position of rotation of described screw hole, described convex surface part can be pushed down the screw head of the screw that is positioned at described screw hole.
preferably, in described steel plate, be adjacent to be provided with two or more described screw holes with described locking cap opening, and described lock nut correspondingly has two or more described concave surface section and convex surface part, wherein in each described concave surface section lock nut first position of rotation in the face of the corresponding screw hole in described two or more screw holes, described lock nut does not block described screw hole, and in lock nut second position of rotation of each described convex surface part in the face of the corresponding screw hole in described two or more screw holes, each described convex surface part can be pushed down the screw head of the screw that is positioned at a described corresponding screw hole.
Preferably, be provided with two or more described locking cap openings in described steel plate, in order to hold two or more described lock nuts.
Preferably, described locking cap opening is made of coaxial macropore and aperture, and the diameter of described macropore is greater than the diameter of described aperture, and described macropore and described aperture communicate with each other; Described lock nut comprises lock nut top and lock nut bottom, described lock nut top is used for being coupled to the described macropore of described locking cap opening, described concave surface section and convex surface part are arranged in described lock nut top, the described aperture of described locking cap opening can be passed in described lock nut bottom, wherein, the external diameter on described lock nut top is less than or equal to the diameter of described macropore and greater than the diameter of described aperture, and the external diameter of described lock nut bottom is less than or equal to the diameter of described aperture; Bottom in described lock nut bottom has formed caulking part, the external diameter of described caulking part is less than the diameter of described aperture before riveted joint, thereby described caulking part can pass described aperture and rivet with described steel plate, the external diameter of described caulking part is greater than the diameter of described aperture after riveted joint, thereby make described lock nut fix with respect to described steel plate along its longitudinal axis direction, but described lock nut can rotate around its longitudinal axis simultaneously with respect to described steel plate.
Preferably, described screw hole is spherical pore, and described screw head has spherical auxiliary section, matches with described spherical pore in this spherical auxiliary section.
Preferably, described steel plate is provided with spherical cambered surface at the part place of being combined with vertebral body.
According to technique scheme of the present utility model, can simplify operating procedure, reduce the operation technique difficulty, and can make the package unit compact conformation.
Particularly, the utlity model has following advantage:
1, waist sacrum anterior plate fixture of the present utility model mainly is comprised of steel plate and screw, lacks the package unit compact conformation than the existing product part of Medtronic Inc., and can reduce operating procedure, simplify operating procedure, reduce the operation technique difficulty, increase the safety and effectiveness of operation.
2, the existing product of hot DIS is that steel plate and screw pass through screw-threaded coupling, and this can produce stress shielding; By comparison, in waist sacrum anterior plate fixture of the present utility model, steel plate is that sphere is combined with screw, and screw also locks by lock nut, thereby can not produce stress shielding merging when shrinking.
3, in waist sacrum anterior plate fixture of the present utility model, steel plate is provided with spherical cambered surface at the part place of being combined with vertebral body, thereby the cambered surface design at steel plate and place, vertebral body joint portion has met anatomical structure, thereby make device stickiness of the present utility model good, do not need osteotomy in operation, and fixing rear reliable and stable, there is no stress shielding.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present application, during the below will describe embodiment, the accompanying drawing of required use is done to introduce simply.Apparently, the accompanying drawing in the following describes only relates to the exemplary embodiment of putting down in writing in the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other drawings and Examples according to these accompanying drawings.
Fig. 1 is the schematic perspective view according to the waist sacrum anterior plate fixture of an embodiment of the present utility model of observing from side top;
Fig. 2 is the schematic top plan view according to the waist sacrum anterior plate fixture of an embodiment of the present utility model of observing from the top;
Fig. 3 is the schematic perspective view according to the lock nut of an embodiment of the present utility model;
Fig. 4 is the schematic perspective view according to the steel plate of an embodiment of the present utility model, can observe the front of described steel plate from this figure;
Fig. 5 is the schematic perspective view according to the steel plate of an embodiment of the present utility model, can observe the back side of described steel plate from this figure;
Fig. 6 is the schematic perspective view according to the screw of an embodiment of the present utility model;
Fig. 7 is applied to the schematic perspective view of vertebral body according to the waist sacrum anterior plate fixture of an embodiment of the present utility model.
Description of reference numerals:
1, steel plate
2, screw
3, lock nut
4, screw hole
5, spherical cambered surface
6, screw head
7, concave surface section
8, convex surface part
9, lumbar vertebra
10, sacral
11, screw body
12, locking cap opening
13, spherical auxiliary section
14, lock nut top
15, lock nut bottom
16, caulking part
17, macropore
18, aperture
The specific embodiment
Describe preferred embodiment of the present utility model in detail below with reference to accompanying drawing.
As shown in Fig. 1 ~ 4, waist sacrum anterior plate fixture of the present utility model comprises steel plate 1 and screw 2, is provided with screw hole 4 in wherein said steel plate 1.In the embodiment of Fig. 1 ~ 4, steel plate 1 is rectangular substantially, and is provided with four screw holes 4 at the place, roughly four bights of this rectangle.Described screw 2 is used for described steel plate 1 is fixed to corpus vertebrae.As shown in Figure 6, described screw 2 is made of screw head 6 and screw body 11, and screw head 6 and screw body 11 form, and the periphery of screw body 11 is provided with screw thread so that fastening this screw 2.The screw body 11 of described screw 2 can pass screw hole 4, and the screw head 6 of described screw 2 can be contained in the screw hole 4 of described steel plate 1, thereby steel plate 1 can be fixed on corpus vertebrae.
As shown in Fig. 1 ~ 4, described waist sacrum anterior plate fixture also comprises lock nut 3, is adjacent to be provided with locking cap opening 12 with described screw hole 4 in described steel plate 1.Described lock nut 3 rotatably remains in described locking cap opening 12.That is, described lock nut 3 is fixed on its longitudinal axis direction in described locking cap opening 12, but can be around its longitudinal axis rotation in described locking cap opening 12.In the embodiment of Fig. 1 ~ 4, described locking cap opening 12 is the shoulder hole shape, namely is made of coaxial macropore 17 and aperture 18, and the diameter of described macropore 17 is greater than the diameter of described aperture 18, and described macropore 17 and described aperture 18 communicate with each other; Described lock nut 3 comprises lock nut top 14 and lock nut bottom 15, described lock nut top 14 is used for being coupled to the described macropore 17 of described locking cap opening 12, the described aperture 18 of described locking cap opening 12 can be passed in described lock nut bottom 15, wherein, the external diameter on described lock nut top 14 is less than or equal to the diameter of described macropore 17 and greater than the diameter of described aperture 18, and the external diameter of described lock nut bottom 15 is less than or equal to the diameter of described aperture 18; 15 bottom has formed caulking part 16 in described lock nut bottom, the external diameter of described caulking part 16 is less than the diameter of described aperture 18 before riveted joint, thereby described caulking part 16 can pass described aperture 18 and rivet with described steel plate 1, the external diameter of described caulking part 16 is greater than the diameter of described aperture 18 after riveted joint, thereby make described lock nut 3 fixing with respect to described steel plate 1 along its longitudinal axis direction, but described lock nut 3 can be around its longitudinal axis with respect to described steel plate 1 rotation simultaneously.
As shown in Figure 3, described lock nut 3 has concave surface section 7 and convex surface part 8 along its periphery, and especially, described concave surface section 7 and convex surface part 8 are arranged in described lock nut top 14.As shown in Fig. 1 ~ 2, in the face of in lock nut first position of rotation of described screw hole 4, described lock nut 3 does not block described screw hole 4 in the concave surface section 7 of described lock nut 3, thereby screw 2 can freely insert in screw hole 4; And in the convex surface part 8 of described lock nut 3 is faced lock nut second position of rotation of described screw hole 4, described convex surface part 8 can be pushed down the screw head 6 of the screw 2 that is positioned at described screw hole 4, thereby can make the screw 2 that has inserted in screw hole 4 can not withdraw from screw hole 4.Described concave surface section 7 and convex surface part 8 can form by cutting one or more arch sections from a cylindrical base.As shown in Fig. 2,4, locking cap opening 12 is overlapped with the part of the profile of adjacent screw hole 4, thereby make locking cap opening 12 and adjacent screw hole 4 be interconnected, so that in lock nut the second position of rotation, the convex surface part 8 of described lock nut 3 can be projected in adjacent screw hole 4, thereby shelters from the screw head 6 of screw 2.
in this utility model, in described steel plate 1, can be adjacent to be provided with two or more described screw holes 4 with described locking cap opening 12, and described lock nut 3 correspondingly has two or more described concave surface section 7 and convex surface part 8, wherein in each described concave surface section 7 lock nut first position of rotation in the face of the corresponding screw hole 4 in described two or more screw holes 4, described lock nut 3 does not block described screw hole 4, and in lock nut second position of rotation of each described convex surface part 8 in the face of the corresponding screw hole 4 in described two or more screw holes 4, each described convex surface part 8 can be pushed down the screw head 6 of the screw 2 that is positioned at a described corresponding screw hole 4.By above-mentioned setting, can adopt a lock nut 3 to lock simultaneously two or more screws 2.In this utility model, can also be provided with two or more described locking cap openings 12 in described steel plate 1, in order to hold two or more described lock nuts 3.Embodiment with two lock nuts 3 and two locking cap openings 12 and four screws 2 and four screw holes 4 has been shown in Fig. 1 ~ 2.
As shown in Fig. 4 ~ 6, in this utility model, described screw hole 4 can be spherical pore, and described screw head 6 can have spherical auxiliary section 13, matches with described spherical pore in this spherical auxiliary section 13.Steel plate 1 is spherical cooperation with coordinating of screw 2, and this can be avoided the generation of stress shielding phenomenon.
As shown in Figure 5, in this utility model, described steel plate 1 can be provided with spherical cambered surface 5 at the part place of being combined with vertebral body.In the embodiment of Fig. 5, described steel plate 1 is provided with respectively a spherical cambered surface 5 at place, the upper and lower at its back side, combines with corresponding corpus vertebrae being used for.Steel plate 1 and lumbar vertebra 9, sacral 10 junctions have the spherical cambered surface design, and this meets human anatomic structure, thereby can be so that device stickiness of the present utility model is good, and are reliable and stable after fixing.
In practical operation, as depicted in figs. 1 and 2, before pedicle screw 2, should make the concave surface section 7 of lock nut 3 in the face of screw hole 4, thereby allow screw 2 to insert in screw holes 4; After screw 2 all is screwed in screw hole 4, the operator can rotate lock nut 3 to make it half-twist, thereby can so that the convex surface part 8 of lock nut 3 just in time be pushed down screw head 6, can prevent that like this screw head 6 from withdrawing from from screw hole 4, thereby prevent that screw 2 from withdrawing from from screw hole 4.And in the embodiment of Fig. 1 and Fig. 2, a lock nut 3 can lock two screws 2 simultaneously.Fig. 7 is applied to the schematic perspective view of vertebral body according to the waist sacrum anterior plate fixture of an embodiment of the present utility model.As shown in Figure 7, steel plate 1 is fixed in lumbar vertebra 9 by two, top screw 2, and steel plate 1 is fixed in sacral 10 by two of bottoms screw 2, and this structure has adopted two lock nuts 3, and wherein each lock nut 3 can lock two screws 2 simultaneously.
According to technique scheme of the present utility model, can simplify operating procedure, reduce the operation technique difficulty, and can make the package unit compact conformation.
The above is only the application's the exemplary specific embodiment.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the design of the application's utility model principle and utility model, can also make some improvement and modification, within these improvement and modification also should be considered as dropping on protection domain of the present utility model.
Claims (6)
1. a waist sacrum anterior plate fixture, comprise steel plate (1) and screw (2), is provided with screw hole (4) in wherein said steel plate (1), and the screw head (6) of described screw (2) can be contained in described screw hole (4),
It is characterized in that,
described waist sacrum anterior plate fixture also comprises lock nut (3), be adjacent to be provided with locking cap opening (12) with described screw hole (4) in described steel plate (1), described lock nut (3) rotatably remains in described locking cap opening (12), described lock nut (3) has concave surface section (7) and convex surface part (8) along its periphery, wherein in the concave surface section (7) of described lock nut (3) faces lock nut first position of rotation of described screw hole (4), described lock nut (3) does not block described screw hole (4), and in the convex surface part (8) of described lock nut (3) is faced lock nut second position of rotation of described screw hole (4), described convex surface part (8) can be pushed down the screw head (6) of the screw (2) that is positioned at described screw hole (4).
2. waist sacrum anterior plate fixture according to claim 1, it is characterized in that, in described steel plate (1), be adjacent to be provided with two or more described screw holes (4) with described locking cap opening (12), and described lock nut (3) correspondingly has two or more described concave surface sections (7) and convex surface part (8), wherein in lock nut first position of rotation of each described concave surface section (7) in the face of the corresponding screw hole (4) in described two or more screw holes (4), described lock nut (3) does not block described screw hole (4), and in lock nut second position of rotation of each described convex surface part (8) in the face of the corresponding screw hole (4) in described two or more screw holes (4), each described convex surface part (8) can be pushed down the screw head (6) of the screw (2) that is positioned at a described corresponding screw hole (4).
3. waist sacrum anterior plate fixture according to claim 2, is characterized in that, is provided with two or more described locking cap openings (12) in described steel plate (1), in order to hold two or more described lock nuts (3).
4. the described waist sacrum of any one anterior plate fixture according to claim 1 ~ 3, it is characterized in that, described locking cap opening (12) is made of coaxial macropore (17) and aperture (18), the diameter of described macropore (17) is greater than the diameter of described aperture (18), and described macropore (17) and described aperture (18) communicate with each other, described lock nut (3) comprises lock nut top (14) and lock nut bottom (15), described lock nut top (14) is used for being coupled to the described macropore (17) of described locking cap opening (12), described concave surface section (7) and convex surface part (8) are arranged in described lock nut top (14), the described aperture (18) of described locking cap opening (12) can be passed in described lock nut bottom (15), wherein, the external diameter on described lock nut top (14) is less than or equal to the diameter of described macropore (17) and greater than the diameter of described aperture (18), the external diameter of described lock nut bottom (15) is less than or equal to the diameter of described aperture (18), formed caulking part (16) in the bottom of described lock nut bottom (15), the external diameter of described caulking part (16) is less than the diameter of described aperture (18) before riveted joint, thereby described caulking part (16) can pass described aperture (18) and rivet with described steel plate (1), the external diameter of described caulking part (16) is greater than the diameter of described aperture (18) after riveted joint, thereby make described lock nut (3) fixing with respect to described steel plate (1) along its longitudinal axis direction, but described lock nut (3) can rotate with respect to described steel plate (1) around its longitudinal axis simultaneously.
5. the described waist sacrum of any one anterior plate fixture according to claim 1 ~ 3, it is characterized in that, described screw hole (4) is spherical pore, and described screw head (6) has spherical auxiliary section (13), matches with described spherical pore in this spherical auxiliary section (13).
6. the described waist sacrum of any one anterior plate fixture according to claim 1 ~ 3, is characterized in that, described steel plate (1) is provided with spherical cambered surface (5) at the part place of being combined with vertebral body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220706749 CN203017070U (en) | 2012-12-19 | 2012-12-19 | Lumbosacral anterior approach steel plate fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220706749 CN203017070U (en) | 2012-12-19 | 2012-12-19 | Lumbosacral anterior approach steel plate fixing device |
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| Publication Number | Publication Date |
|---|---|
| CN203017070U true CN203017070U (en) | 2013-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220706749 Expired - Lifetime CN203017070U (en) | 2012-12-19 | 2012-12-19 | Lumbosacral anterior approach steel plate fixing device |
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| Country | Link |
|---|---|
| CN (1) | CN203017070U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103876816A (en) * | 2012-12-19 | 2014-06-25 | 上海微创骨科医疗科技有限公司 | Lumbosacral anterior plate fixing device |
| CN105615970A (en) * | 2014-11-13 | 2016-06-01 | 无锡市闻泰百得医疗器械有限公司 | Thoracolumbar anterior structure |
-
2012
- 2012-12-19 CN CN 201220706749 patent/CN203017070U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103876816A (en) * | 2012-12-19 | 2014-06-25 | 上海微创骨科医疗科技有限公司 | Lumbosacral anterior plate fixing device |
| WO2014094551A1 (en) * | 2012-12-19 | 2014-06-26 | 上海微创骨科医疗科技有限公司 | Lumbosacral anterior approach steel plate fixing device |
| CN105615970A (en) * | 2014-11-13 | 2016-06-01 | 无锡市闻泰百得医疗器械有限公司 | Thoracolumbar anterior structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201318 twenty-third, 1-28 Lane 588, Tian Xiong Road, Zhou Pu town, Pudong New Area, Shanghai Co-patentee after: SUZHOU MINIMALLY INVASIVE SPINAL TRAUMA MEDICAL TECHNOLOGY CO.,LTD. Patentee after: Shanghai Microport Orthopedics Co.,Ltd. Address before: 201318 twenty-third, 1-28 Lane 588, Tian Xiong Road, Zhou Pu town, Pudong New Area, Shanghai Co-patentee before: SUZHOU HEALTH MEDICAL Co.,Ltd. Patentee before: Shanghai Microport Orthopedics Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190108 Address after: 215000 Workshop B, No. 112 Fangzhong Street, Suzhou Industrial Park, Suzhou City, Jiangsu Province Patentee after: SUZHOU MINIMALLY INVASIVE SPINAL TRAUMA MEDICAL TECHNOLOGY CO.,LTD. Address before: 201318 twenty-third, 1-28 Lane 588, Tian Xiong Road, Zhou Pu town, Pudong New Area, Shanghai Co-patentee before: SUZHOU MINIMALLY INVASIVE SPINAL TRAUMA MEDICAL TECHNOLOGY CO.,LTD. Patentee before: Shanghai Microport Orthopedics Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130626 |
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| CX01 | Expiry of patent term |