技术领域technical field
本实用新型属于医疗器械技术领域，具体涉及一种能防止钉座胀开的椎弓根钉。The utility model belongs to the technical field of medical instruments, in particular to a pedicle screw capable of preventing a screw seat from expanding.
背景技术Background technique
目前，国内外在脊柱后路内固定手术中，都会使用到椎弓根钉和连接棒进行脊柱后路的内固定，为此人们提出了如公开号： 101803944A “一种椎弓根钉”、公开号： 10206803A “一种椎弓根钉”、公告号：101732086A“带矫形的椎弓根钉 ”、公告号：201996649U“一种新型的椎弓根钉” 等有关“椎弓根钉”的技术方案。而椎弓根钉和连接棒之间都是采用“锁定螺母”或称“压紧螺母”压紧固定连接，由于手术需要，椎弓根钉钉座采用开口螺纹即U型槽的设计，在锁定螺母与椎弓根钉配合锁定连接棒后，因为连接棒受到锁定螺母压紧力的同时也会对锁定螺母和椎弓根钉的钉座产生反作用力，钉座在反作用力的作用下其壁就会扩大胀开，结果造成锁定螺母与钉座二者的螺纹的接触面积减少，导致锁定螺母锁定连接棒效果不佳直致锁定螺母滑丝现象的出现。另外，钉座的下部部位其下面是钉体，其上面是U型槽，所以此处的应力特别集中；而在手术过程中，下面很长的钉体要旋入脊柱中，上面的螺纹孔会受到与之与啮合的锁定螺母的挤压，所以此处受到的力也十分集中，因为以上所述的诸多因素，钉座的下部部位很容易变形甚至损坏。但诸如上述的有关“椎弓根钉”的现有技术中没有克服上述弊病的技术方案。At present, pedicle screws and connecting rods are used for internal fixation of the posterior spine at home and abroad. For this reason, people have proposed such as the publication number: 101803944A "a pedicle screw", Publication number: 10206803A "a pedicle screw", announcement number: 101732086A "pedicle screw with orthopedics", announcement number: 201996649U "a new type of pedicle screw", etc. Technical solutions. The pedicle screw and the connecting rod are connected by "lock nut" or "pressing nut" to compress and fix the connection. Due to the needs of the operation, the pedicle screw seat adopts the design of open thread, that is, U-shaped groove. After the locking nut and the pedicle screw cooperate to lock the connecting rod, because the connecting rod is subjected to the compression force of the locking nut, it will also produce a reaction force on the locking nut and the screw seat of the pedicle screw, and the screw seat will lose weight under the action of the reaction force. The wall will expand and swell, and as a result, the contact area of the threads of the lock nut and the nail seat is reduced, resulting in the poor effect of the lock nut locking the connecting rod and causing the occurrence of the lock nut slippage phenomenon. In addition, the lower part of the nail seat is the nail body below and the U-shaped groove above it, so the stress here is particularly concentrated; and during the operation, the long nail body below has to be screwed into the spine, and the threaded hole on the top It will be squeezed by the locking nut engaged with it, so the force received here is also very concentrated. Because of the above-mentioned many factors, the lower part of the nail seat is easily deformed or even damaged. But there is no technical solution to overcome the above-mentioned disadvantages in the prior art such as the above-mentioned relevant "pedicle screw".
发明内容Contents of the invention
本实用新型的目的是针对现有技术存在的弊病，提供一种能防止钉座胀开的椎弓根钉，它能有效防止钉座在受到连接棒反作用力、锁定螺母的压紧力的情况下其壁扩大胀开；消除钉座的下部部位应力特别集中、受力十分集中所带来的容易变形甚至损坏的隐患。The purpose of this utility model is to provide a kind of pedicle screw that can prevent the expansion of the screw base against the disadvantages of the prior art, which can effectively prevent the screw base from being affected by the reaction force of the connecting rod and the compression force of the locking nut. The lower wall expands and expands; eliminates the hidden danger of easy deformation or even damage caused by the special concentration of stress and concentrated force at the lower part of the nail seat.
上述的发明目的是通过以下技术方案实现的：Above-mentioned purpose of the invention is achieved through the following technical solutions:
一种能防止钉座胀开的椎弓根钉，包括钉体和与钉体相连的钉座，所述钉座上设置有连接连接棒的U型槽和螺纹孔,螺纹孔与一锁定连接棒的锁定螺母相啮合，其要点在于钉座外壁套装有防止钉座扩大胀开的防胀套。A pedicle screw capable of preventing the expansion of the screw seat, comprising a nail body and a nail seat connected to the nail body, the nail seat is provided with a U-shaped groove and a threaded hole for connecting a connecting rod, and the threaded hole is connected with a locking The locking nut of the bar is engaged, and the key point is that the outer wall of the nail seat is covered with an anti-expansion sleeve to prevent the nail seat from expanding and expanding.
作为优选，所述的防胀套对称的二侧设有连接棒能穿过与钉座上U型槽吻合的圆弧槽，它套装于钉座连接棒穿过并锁定的下部部位。As a preference, the symmetrical two sides of the anti-expansion sleeve are provided with circular arc grooves through which the connecting rods can pass and coincide with the U-shaped grooves on the nail holder, and are fitted in the lower part of the nail holder where the connecting rods pass through and locked.
作为优选，锁定螺母顶部设有防退片，防退片二侧伸出U型槽部分置于防胀套顶部。As a preference, an anti-retreat piece is provided on the top of the lock nut, and the U-shaped groove protruding from both sides of the anti-retreat piece is placed on the top of the anti-expansion sleeve.
本实用新型因为钉座外壁套装有防止钉座扩大胀开的防胀套，从而使钉座的外壁得到了加固，它能有效防止钉座在受到连接棒反作用力、锁定螺母的压紧力的情况下其壁扩大胀开；消除了钉座的下部部位应力特别集中、受力十分集中所带来的容易变形甚至损坏的隐患；另外，锁定螺母顶部设有防退片，防退片二侧伸出U型槽部分置于防胀套顶部，手术前防退片9用激光焊接在防胀套顶部，手术中将带防退片的防胀套7套装于钉座的下部部位，从而可永久性防止锁定螺母松动上移；还有，它结构简单、体积小，手术中使用操作方便，所增加的制造成本也十分有限，所以容易推广。In the utility model, because the outer wall of the nail seat is covered with an anti-expansion sleeve to prevent the expansion and expansion of the nail seat, the outer wall of the nail seat is reinforced, and it can effectively prevent the nail seat from being subjected to the reaction force of the connecting rod and the compression force of the lock nut. Under normal circumstances, its wall expands and expands; eliminates the hidden dangers of easy deformation or even damage caused by the special concentration of stress at the lower part of the nail seat and the high concentration of force; The part protruding from the U-shaped groove is placed on the top of the anti-expansion sleeve, and the anti-retraction sheet 9 is laser welded on the top of the anti-expansion sleeve before the operation. Permanently prevent the lock nut from loosening and moving up; in addition, it has a simple structure, small size, convenient use and operation in operations, and the increased manufacturing cost is also very limited, so it is easy to popularize.
附图说明Description of drawings
图1：本实用新型的结构示意图Figure 1: Structural schematic diagram of the utility model
图2：图1的立体图Figure 2: Perspective view of Figure 1
图3：本实用新型的使用状态图Figure 3: The use state diagram of the utility model
图1—3中，1-钉体，2-钉座，3-连接棒，4-U型槽，5-螺纹孔,6-锁定螺母，7-防胀套，8-圆弧槽，9-防退片。In Figure 1-3, 1-nail body, 2-nail seat, 3-connecting rod, 4-U-shaped groove, 5-threaded hole, 6-lock nut, 7-anti-expansion sleeve, 8-arc groove, 9 -Anti-return film.
具体实施方式Detailed ways
以下就图1--3所表示的实施例面对本实用新型作进一步描述。Below with regard to the embodiment shown in Fig. 1--3 face the utility model to be further described.
它包括钉体1和与钉体1相连的钉座2，所述钉座2上设置有连接连接棒3的U型槽4和螺纹孔5,螺纹孔5与一锁定连接棒3的锁定螺母6相啮合，钉座1外壁套装有防止钉座1扩大胀开的防胀套7；所述的防胀套7对称的二侧设有连接棒3能穿过与钉座1上U型槽4吻合的圆弧槽8，它套装于钉座2连接棒3穿过并锁定的下部部位；锁定螺母6顶部设有防退片9，防退片9二侧伸出U型槽4部分置于防胀套7顶部。It includes a nail body 1 and a nail seat 2 connected with the nail body 1, the nail seat 2 is provided with a U-shaped groove 4 connecting the connecting rod 3 and a threaded hole 5, and the threaded hole 5 and a locking nut for locking the connecting rod 3 6 phase meshing, the outer wall of the nail base 1 is equipped with an anti-expansion sleeve 7 to prevent the expansion and expansion of the nail base 1; the symmetrical two sides of the anti-expansion sleeve 7 are provided with connecting rods 3 that can pass through the U-shaped groove on the nail base 1 4 coincident circular arc groove 8, which is set on the lower part where the connecting rod 3 of the nail base 2 passes through and locked; the top of the lock nut 6 is provided with an anti-retreat piece 9, and the two sides of the anti-retreat piece 9 protrude from the U-shaped groove 4 parts. On the top of the anti-expansion sleeve 7.
本实施例的使用操作如下：首先将二个“一种能防止钉座胀开的椎弓根钉”的钉体1旋入脊柱中，将连接棒3穿过二个钉座2的U型槽4，接着锁定螺母6沿着螺纹孔5往下旋，直至将连接棒3压紧锁定在U型槽4中，然后将手术前防退片9已经用激光焊接在防胀套7顶部的防胀套7套装于钉座2的下部部位，防胀套7能防止锁定螺母6松动上移。The operation of the present embodiment is as follows: first screw the nail body 1 of two "a kind of pedicle screw that can prevent the expansion of the nail seat" into the spine, and connect the connecting rod 3 through the U-shape of the two nail seats 2. slot 4, and then the lock nut 6 is screwed down along the threaded hole 5 until the connecting rod 3 is compressed and locked in the U-shaped slot 4, and then the anti-retraction sheet 9 before the operation has been laser welded on the top of the anti-expansion sleeve 7 The anti-expansion cover 7 is sleeved on the lower part of the nail seat 2, and the anti-expansion cover 7 can prevent the lock nut 6 from loosening and moving up.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420621630.6UCN204158474U (en) | 2014-10-24 | 2014-10-24 | A kind of pedicle nail that can prevent nail seat distending |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420621630.6UCN204158474U (en) | 2014-10-24 | 2014-10-24 | A kind of pedicle nail that can prevent nail seat distending |
| Publication Number | Publication Date |
|---|---|
| CN204158474Utrue CN204158474U (en) | 2015-02-18 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420621630.6UExpired - LifetimeCN204158474U (en) | 2014-10-24 | 2014-10-24 | A kind of pedicle nail that can prevent nail seat distending |
| Country | Link |
|---|---|
| CN (1) | CN204158474U (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104323844A (en)* | 2014-10-24 | 2015-02-04 | 浙江科惠医疗器械有限公司 | Pedicle screw capable of preventing screw base from expanding |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104323844A (en)* | 2014-10-24 | 2015-02-04 | 浙江科惠医疗器械有限公司 | Pedicle screw capable of preventing screw base from expanding |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | Owner name:ZHEJIANG CANWELL MEDICAL CO., LTD. Free format text:FORMER NAME: KEHUI MEDICAL EQUIPMENT CO., LTD., ZHEJIANG | |
| CP03 | Change of name, title or address | Address after:Wucheng District of Zhejiang city in Jinhua Province, Jinhua City, 321016 South Street No. 466 Xian Patentee after:CANWELL MEDICAL Co.,Ltd. Address before:321016 Zhejiang city in Jinhua Province, Xinhua Street No. 466 Patentee before:ZHEJIANG CANWELL MEDICAL Co.,Ltd. | |
| CX01 | Expiry of patent term | Granted publication date:20150218 | |
| CX01 | Expiry of patent term |