CN203089336U - Spine screw - Google Patents
Spine screw Download PDFInfo
- Publication number
- CN203089336U CN203089336U CN 201220731636 CN201220731636U CN203089336U CN 203089336 U CN203089336 U CN 203089336U CN 201220731636 CN201220731636 CN 201220731636 CN 201220731636 U CN201220731636 U CN 201220731636U CN 203089336 U CN203089336 U CN 203089336U
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- screw
- threads
- cortical bone
- spinal
- screw thread
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Abstract
The utility model discloses a spine screw. The spine screw comprises a U-shaped screw base. A screw body is connected on the U-shaped screw base. An upper segment of threads and a lower segment of threads are mutually connected and are arranged on the screw body. The upper segment of threads is cortical bone threads located on a cortical bone segment, and the lower segment of threads is cancellous bone threads located on a cancellous bone segment. Because the outer diameters of the cortical bone threads equal to those of the cancellous bone threads, while the inner diameters of the cortical bone threads equal to those of the cancellous bone threads, the diameter of a screw body segment located on a cortical bone part is larger than that of a screw body segment located on a cancellous part, and the cortical bone threads and the cancellous bone threads are all double-head threads. The spin screw has the advantages of being capable of effectively avoiding the phenomenon that the spine screw is bent and deformed, ensuring combining strength of the screw body and skeletons of a human body, greatly improving the spine-screw-entering speed, and effectively reducing the probability of surgical bleeding infection and other complications.
Description
Technical field
This utility model relates to medical instruments field, employed spinal screw when relating in particular to the treatment of a kind of orthopaedics internal fixation operation.
Background technology
Heredity, abnormal development, wound, chronic stress and tumor and other disease can cause the pathological condition of spinal column, this reduced spinal column pliability, limited the range of movement of spinal column.Adopting the surgery internal fixation operation that above-mentioned pathological condition is treated is Therapeutic Method medically commonly used at present.Spinal screw many at spinal columns such as thoracic vertebra, lumbar vertebra, waist sacrum, iliums preceding road and the internal fixation operation of the way of escape in use.Spinal screw comprises spinal column multi-axial screws and spinal fixation screw, the structure of spinal column multi-axial screws and spinal fixation screw is basic identical, its structure comprises: the staple seat, be connected with screw body on the staple seat, screw body is provided with screw thread, described screw thread is an one start screw, and from top to bottom depth of thread unanimity on the screw body.The difference of spinal column multi-axial screws and spinal fixation bolt structure is: between the staple seat of spinal column multi-axial screws and the screw body for can regulate the flexible connection of direction, between the staple seat of spinal fixation screw and the screw body for integral type or fixedly connected.The shortcoming of the spinal screw of said structure is as follows: one, because be one start screw, pitch is less relatively, so it is slow to advance nail speed, causes the probability that operative hemorrhage infects and other complication takes place higher relatively; Two, the degree of depth unanimity of the screw thread on the screw body, and skeleton is respectively the cortical bone of hard and compact from outside to inside and is spongy loose spongy bone, for spongy bone there being hold preferably, usually the degree of depth with screw thread is provided with deeplyer relatively, correspondingly also just dwindled the diameter of screw body itself, also, so just cause the spinal screw that is positioned at the cortical bone part easily because of insufficient strength flexural deformation easily with regard to the corresponding intensity that reduces screw body; If increase the intensity of screw body and reduce the degree of depth of screw thread, then can reduce the hold that combines between the spinal screw of spongy bone part and spongy bone again greatly.
The utility model content
This utility model technical issues that need to address are: provide a kind of and can add F.F. nail speed, improve screw body intensity, and be difficult for diastrophic spinal screw.
For addressing the above problem, the technical solution adopted in the utility model is: spinal screw, comprise: the staple seat, be connected with screw body on the staple seat, screw body is provided with screw thread, described screw thread be divided into interconnective on, following two sections, the epimere screw thread is the cortical bone screw thread that is positioned at the cortical bone section, the hypomere screw thread is the cancellous threads that is positioned at the spongy bone section, the cortical bone screw thread is identical with the external diameter of cancellous threads, but the internal diameter of cortical bone screw thread is greater than the internal diameter of cancellous threads, makes the diameter of the screw body section that is positioned at the cortical bone part greater than the diameter of the screw body section that is positioned at the spongy bone part, and cortical bone screw thread and cancellous threads are double thread.
Further, aforesaid spinal screw, wherein, the length of the length of described epimere screw thread and hypomere screw thread accounts for 2/5ths and 3/5ths of thread segment length overall on the screw body respectively.
Further, aforesaid spinal screw, wherein, described spinal screw is the staple seat with screw body is the integral type or the spinal fixation screw of fixedlying connected.
Further, aforesaid spinal screw, wherein, described spinal screw be the staple seat with screw body between the spinal column multi-axial screws that is connected for adjustable movable
The beneficial effects of the utility model: under the identical prerequisite of major diameter of thread, the internal diameter of the cortical bone screw thread of cortex bone parts on the screw body is arranged to internal diameter greater than the cancellous threads of spongy bone part, also promptly be positioned at the diameter of the diameter of cortical bone screw body section partly greater than the screw body section that is positioned at the spongy bone part, so both increased the intensity of the screw body of cortical bone part, can guarantee that again screw body and spongy bone partly have enough holds, thereby both effectively avoided the diastrophic phenomenon of spinal screw to take place, and can guarantee the bond strength of screw body and skeleton again; In addition, cortical bone screw thread and cancellous threads all are arranged to double thread, have strengthened the helical pitch of screw thread, that has improved spinal screw so greatly advances nail speed, effectively reduces the probability that operative hemorrhage infects and other complication takes place.
Description of drawings
Fig. 1 is that spinal screw described in the utility model is the structural representation of spinal column multi-axial screws.
Fig. 2 is that spinal screw described in the utility model is the structural representation of spinal fixation screw.
Fig. 3 is the part section structural representation of screw body among Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing and optimum embodiment this utility model is described in further detail.
Embodiment 1: as Fig. 1, shown in Figure 3, the described spinal screw of present embodiment is the spinal column multi-axial screws, comprise: staple seat 1, be connected with screw body 2 on the staple seat 1, concrete syndeton in the present embodiment between staple seat 1 and the screw body 2 comprises: the head of screw body 2 is a spherical head 21, the bottom of staple seat 1 is provided with through hole 11, be provided with interstage sleeve 5 in the staple seat 1 of through hole 11 tops, the diameter of through hole 11 is less than the diameter of spherical head 21, and can guarantee that screw body 2 can stretch out from through hole 11, form the sphere installation cavity that matches with spherical head 21 between the staple seat 1 of interstage sleeve 5 bottoms and through hole 11 tops, the spherical head 21 of screw body 2 is installed in the sphere installation cavity, and can in the sphere installation cavity, rotate; Screw body 2 is provided with screw thread, described screw thread be divided into interconnective on, following two sections, the epimere screw thread is the cortical bone screw thread 3 that is positioned at the cortical bone section, the hypomere screw thread is the cancellous threads 4 that is positioned at the spongy bone section, cortical bone screw thread 3 is identical with the external diameter of cancellous threads 4, but the internal diameter of cortical bone screw thread 3 is greater than the internal diameter of cancellous threads 4, make the diameter that is positioned at cortical bone screw body section partly greater than the diameter that is positioned at spongy bone screw body section partly, and cortical bone screw thread 3 and cancellous threads 4 are double thread, and the length of the length of cortical bone screw thread 3 and cancellous threads 4 accounts for 2/5ths and 3/5ths of thread segment length overall on the screw body 2 respectively.
Embodiment 2: as shown in Figure 2, the described spinal screw of present embodiment is the spinal fixation screw, comprise: staple seat 1, staple seat 1 is an integral structure with screw body 2 in the present embodiment, screw body 2 is provided with screw thread, described screw thread be divided into interconnective on, following two sections, the epimere screw thread is the cortical bone screw thread 3 that is positioned at the cortical bone section, the hypomere screw thread is the cancellous threads 4 that is positioned at the spongy bone section, cortical bone screw thread 3 is identical with the external diameter of cancellous threads 4, but the internal diameter of cortical bone screw thread 3 is greater than the internal diameter of cancellous threads 4, make the diameter that is positioned at cortical bone screw body section partly greater than the diameter that is positioned at spongy bone screw body section partly, and cortical bone screw thread 3 and cancellous threads 4 are double thread, and the length of the length of cortical bone screw thread 3 and cancellous threads 4 accounts for 2/5ths and 3/5ths of thread segment length overall on the screw body 2 respectively.In the present embodiment, the structure of the screw body among the structure of screw body 2 and the embodiment 1 is identical, can be referring to shown in Figure 3.
Among above-mentioned two embodiment, last, under the identical prerequisite of following two sections major diameter of threads, the internal diameter of the cortical bone screw thread 3 of cortex bone parts on the screw body 2 is arranged to internal diameter greater than the cancellous threads 4 of spongy bone part, also promptly be positioned at the diameter of the diameter of cortical bone screw body section partly greater than the screw body section that is positioned at the spongy bone part, so both increased the intensity of the screw body of cortical bone part, can guarantee that again screw body and spongy bone partly have enough holds, thereby both effectively avoided the diastrophic phenomenon of spinal screw to take place, and can guarantee the bond strength of screw body and skeleton again; In addition, cortical bone screw thread 3 and cancellous threads 4 all are arranged to double thread, have strengthened the helical pitch of screw thread, that has improved spinal screw so greatly advances nail speed, effectively reduces the probability that operative hemorrhage infects and other complication takes place.
Claims (4)
1. spinal screw, comprise: the staple seat, be connected with screw body on the staple seat, screw body is provided with screw thread, it is characterized in that: described screw thread be divided into interconnective on, following two sections, the epimere screw thread is the cortical bone screw thread that is positioned at the cortical bone section, the hypomere screw thread is the cancellous threads that is positioned at the spongy bone section, the cortical bone screw thread is identical with the external diameter of cancellous threads, but the internal diameter of cortical bone screw thread is greater than the internal diameter of cancellous threads, make the diameter of the screw body section be positioned at the cortical bone part greater than the diameter of the screw body section that is positioned at the spongy bone part, and cortical bone screw thread and cancellous threads are double thread.
2. spinal screw according to claim 1 is characterized in that: the length of the length of described epimere screw thread and hypomere screw thread accounts for 2/5ths and 3/5ths of thread segment length overall on the screw body respectively.
3. spinal screw according to claim 1 and 2 is characterized in that: described spinal screw is the staple seat with screw body is the integral type or the spinal fixation screw of fixedlying connected.
4. spinal screw according to claim 1 and 2 is characterized in that: described spinal screw be the staple seat with screw body between the spinal column multi-axial screws that is connected for adjustable movable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220731636 CN203089336U (en) | 2012-12-27 | 2012-12-27 | Spine screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220731636 CN203089336U (en) | 2012-12-27 | 2012-12-27 | Spine screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203089336U true CN203089336U (en) | 2013-07-31 |
Family
ID=48840789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220731636 Expired - Fee Related CN203089336U (en) | 2012-12-27 | 2012-12-27 | Spine screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203089336U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103006308A (en) * | 2012-12-27 | 2013-04-03 | 苏州欣荣博尔特医疗器械有限公司 | Spine bolt |
| CN103800066A (en) * | 2013-12-24 | 2014-05-21 | 厦门大博颖精医疗器械有限公司 | Bone screw |
| CN104799927A (en) * | 2015-05-11 | 2015-07-29 | 北京贝思达生物技术有限公司 | Spinal internal fixation screw-rod device |
| CN108420572A (en) * | 2017-02-14 | 2018-08-21 | 华沙整形外科股份有限公司 | spinal implant system and method |
-
2012
- 2012-12-27 CN CN 201220731636 patent/CN203089336U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103006308A (en) * | 2012-12-27 | 2013-04-03 | 苏州欣荣博尔特医疗器械有限公司 | Spine bolt |
| CN103800066A (en) * | 2013-12-24 | 2014-05-21 | 厦门大博颖精医疗器械有限公司 | Bone screw |
| CN104799927A (en) * | 2015-05-11 | 2015-07-29 | 北京贝思达生物技术有限公司 | Spinal internal fixation screw-rod device |
| CN108420572A (en) * | 2017-02-14 | 2018-08-21 | 华沙整形外科股份有限公司 | spinal implant system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20211227 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |