CN203662887U - Bone screw - Google Patents
Bone screw Download PDFInfo
- Publication number
- CN203662887U CN203662887U CN201320859233.8U CN201320859233U CN203662887U CN 203662887 U CN203662887 U CN 203662887U CN 201320859233 U CN201320859233 U CN 201320859233U CN 203662887 U CN203662887 U CN 203662887U
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- Prior art keywords
- thread
- screw
- shallow
- deep
- threads
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 210000000988 bone and bone Anatomy 0.000 title claims abstract description 41
- 238000010079 rubber tapping Methods 0.000 claims abstract description 31
- 230000007704 transition Effects 0.000 claims description 30
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 208000033999 Device damage Diseases 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 230000001054 cortical effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 206010033675 panniculitis Diseases 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 210000004304 subcutaneous tissue Anatomy 0.000 description 1
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Abstract
The utility model discloses a bone screw which comprises a screw rod body. Threads are arranged on the screw rod body. The threads include the front section threads and the rear section threads, wherein the front section threads and the rear section threads are connected with each other, the front section threads are deep threads, and the rear section threads are shallow threads. The outer diameter of the shallow threads and the outer diameter of the deep threads are the same. The inner diameter of the shallow threads is larger than the inner diameter of the deep threads. The front end of the shallow threads is provided with a self-tapping groove. Due to the design of the self-tapping groove, screw-in torsion and screw-out torsion which are increased due to the change of the diameter of the shallow threads and the diameter of the deep threads can be reduced, time of operations can be accordingly shortened, the operation efficiency and operation achievement ratio can be improved, and the risk of screw breakage or device damage is reduced.
Description
Technical field
This utility model relates to a kind of medical apparatus and instruments, particularly relates to a kind of bone screw.
Background technology
Bone screw is mainly used in treating a series of diseases such as clinical orthopaedics spinal column, wound, has good result.Screw thread on bone screw is generally divided into two parts, and a part is for being positioned at the shallow thread of cortical bone section, and another part is the deep thread that is positioned at spongy bone section.Traditional bone screw, its shallow thread is identical with the internal diameter of deep thread, causes in the time of fixing cortical bone, the screw body of rod insufficient strength of shallow thread part, easily ruptures, and in the time of fixing spongy bone,, because the thread of spongy bone part is more shallow, easily occur loosening or deviate from.In order to solve the above-mentioned weak point of traditional bone screw, there is a kind of novel bone screw in prior art, it makes shallow thread identical with the external diameter of deep thread, make the internal diameter of shallow thread be greater than the internal diameter of deep thread, the intensity that increases the screw body of rod of shallow thread part with this solves the more shallow problem of thread of spongy bone part simultaneously.But, this bone screw of prior art, adopts above-mentioned variable diameter design, although solved the weak point of traditional bone screw, but also produce new problem: after variable diameter design, the tooth cutting edge of a knife or a sword of deep thread is sharper, and while being screwed into, resistance is less, but while being screwed to the shallow thread of screw body of rod back segment, because the tooth cutting edge of a knife or a sword width of shallow thread becomes large, increased and be screwed into resistance, the torsion being screwed into also strengthens, and along with the shallow thread the being screwed into resistance that more multiform becomes is larger.Thereby the structural design of this bone screw of technology, has increased the torsion that bone screw is screwed into and back-outs now, has not only increased operation easier, also easily there is the situation that broken nail or apparatus damage.
Utility model content
The purpose of this utility model is to overcome the deficiency of prior art, and a kind of bone screw is provided.
This utility model solves the technical scheme that its technical problem adopts: a kind of bone screw, comprise the screw body of rod, this screw body of rod is provided with screw thread, and this screw thread comprises interconnective leading portion screw thread and back segment screw thread, leading portion screw thread is deep thread, and back segment screw thread is shallow thread; Shallow thread is identical with the external diameter of deep thread, and the internal diameter of shallow thread is greater than the internal diameter of deep thread; The front position of shallow thread is provided with self tapping groove.
Further, the screw thread on the described screw body of rod also comprises the transition screw thread between described shallow thread and deep thread,
The two ends of this transition screw thread interconnect with described shallow thread and deep thread respectively, this transition screw thread is identical with the external diameter of described shallow thread, the internal diameter of this transition screw thread is between the internal diameter of described shallow thread and the internal diameter of described deep thread, and direction along described shallow thread to deep thread is successively decreased gradually.
Further, the screw thread on the described screw body of rod is double thread.
Further, described self tapping groove is variable-diameter structure.
Further, the radial dimension of described self tapping groove increases progressively gradually along described shallow thread front end to the direction of its end.
Further, the groove face of described self tapping groove is cambered surface.
Further, the bar wall of the screw body of rod of described transition screw thread position is inclined-plane, and the slope on this inclined-plane is 1 °～20 °.
Further, the length of described shallow thread, transition screw thread, deep thread accounts for respectively 2/5,1/5,2/5 of total reach.
Further, the length of described self tapping groove accounts for 1/5～1/2 of described shallow thread total length.
The beneficial effects of the utility model are:
1, owing to being provided with self tapping groove in the front position of shallow thread, make this utility model can utilize this self tapping groove to change the transition Ya Feng position that tooth cutting edge of a knife or a sword broadens, form self tapping effect, and shallow thread is screwed into the resistance that more multiform becomes also can be because there being the self tapping function of this self tapping groove to reduce the resistance producing because of its tooth cutting edge of a knife or a sword wide variety, thereby the torsion that the shallow thread of back segment is screwed into is relatively steady, and reduce the torsion that bears that is screwed into apparatus.Therefore, this utility model can reduce the torsion that is screwed into and back-outs that shallow thread and deep thread increase because of reducing, thereby is conducive to reduce operation easier, reduces operating time, improve operation efficiency and success rate of operation, and can greatly reduce the risk that broken nail or apparatus damage occur.
2, because the screw thread on the screw body of rod also comprises the transition screw thread between shallow thread and deep thread, the two ends of this transition screw thread interconnect with shallow thread and deep thread respectively, this transition screw thread is identical with the external diameter of shallow thread, the internal diameter of this transition screw thread is between the internal diameter of shallow thread and the internal diameter of described deep thread, and direction along shallow thread to deep thread is successively decreased gradually, make this utility model can utilize the screw body of rod section of this transition screw thread position to cushion and transition for the variable diameter design of shallow thread and deep thread provides, thereby make the process operation of this bone screw convenient on the one hand, can reduce on the other hand the risk that fracture occurs for the junction between shallow thread and deep thread in operation process, this is because direct reducing easily ruptures in junction between shallow thread and deep thread.
3, because the screw thread on the screw body of rod is double thread, be that shallow thread and deep thread are respectively double thread, make this utility model can utilize double thread to increase its intensity, and further reduce into nail and time of going out nail, thereby further improve operation efficiency and success rate of operation.
Below in conjunction with drawings and Examples, this utility model is described in further detail; But a kind of bone screw of the present utility model is not limited to embodiment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
The specific embodiment
Embodiment, shown in Figure 1, a kind of bone screw of the present utility model, comprise the screw body of rod 1, this screw body of rod 1 is provided with screw thread, this screw thread comprises interconnective leading portion screw thread and back segment screw thread, and back segment screw thread is the shallow thread 2 that is positioned at cortical bone section, and leading portion screw thread is the deep thread 3 that is positioned at spongy bone section; Shallow thread 2 is identical with the external diameter of deep thread 3, and the internal diameter of shallow thread 2 is greater than the internal diameter of deep thread 3, makes the diameter of the screw body of rod 1 of shallow thread 2 positions be greater than the diameter of the screw body of rod 1 of deep thread 3 positions.The front position of shallow thread 2 is provided with self tapping groove 4, and specifically the direction of the radial dimension of this self tapping groove 4 along shallow thread front end to its rear end increases progressively gradually, and the groove face of this self tapping groove 4 is preferably cambered surface.Above-mentioned deep thread, shallow thread are to name according to the degree of depth of screw thread, and the degree of depth of leading portion screw thread is greater than the degree of depth of back segment screw thread, therefore leading portion screw thread is deep thread, corresponding, back segment screw thread is shallow thread; The definition of above-mentioned leading portion screw thread and back segment screw thread is that the sequencing being screwed into according to screw thread is distinguished, that is, the thread segment being first screwed into is leading portion screw thread, after the thread segment that is screwed into be back segment screw thread; Accordingly, the front end of shallow thread 2 refers to the free end that shallow thread is screwed at first, the front end neighbour deep thread 3 of this shallow thread 2, and the rear end of shallow thread 2 refers to another free end of shallow thread, it is finally screwed into.
Preferred as one, screw thread on the above-mentioned screw body of rod 1 also comprises the transition screw thread 5 between shallow thread 2 and deep thread 3, the two ends of this transition screw thread 5 interconnect with shallow thread 2 and deep thread 3 respectively, this transition screw thread 5 is identical with the external diameter of shallow thread 2, the internal diameter (i.e. the diameter of the screw body of rod 1 of these transition screw thread 5 positions) of this transition screw thread 5, between the internal diameter of shallow thread 2 and the internal diameter of described deep thread 3, and successively decreases along shallow thread 2 to the direction of deep thread 3 gradually.Specifically, the bar wall of the screw body of rod of transition screw thread 5 positions is inclined-plane, and the slope on this inclined-plane is 1 °～20 °, is preferably 15 °.
Preferred as one, the screw thread on the above-mentioned screw body of rod 1 is double thread, that is, above-mentioned shallow thread 2, deep thread 3 and transition screw thread 5 are respectively double thread, and corresponding, the self tapping groove 4 of shallow thread 2 front position settings is also two.
Preferred as one, the self tapping groove 4 that above-mentioned shallow thread 2 front ends arrange is variable-diameter structure, and specifically: the direction of the radial dimension of self tapping groove 4 along shallow thread front end to its rear end successively decreased gradually, special, the groove face of this self tapping groove 4 is cambered surface.
Preferred as one, the length of above-mentioned shallow thread 2 accounts for 2/5 of total reach, the length of transition screw thread 5 accounts for 1/5 of total reach, the length of deep thread 3 accounts for 2/5 of total reach, certainly not necessarily must be like this, the length ratio of this shallow thread 2, transition screw thread 5 and deep thread 3 can be adjusted according to the ratio of the bony structures of bone different parts.The length of above-mentioned self tapping groove account for shallow thread 2 total length 1/5～1/2.
A kind of bone screw of the present utility model, the self tapping groove 4 of its shallow thread 2 front position designs, change the transition Ya Feng position that the tooth cutting edge of a knife or a sword of shallow thread 2 broadens, form self tapping effect, and shallow thread 2 is screwed into the resistance that more multiform becomes also can be because there being the self tapping function of this self tapping groove to reduce the resistance producing because of its tooth cutting edge of a knife or a sword wide variety, thereby the torsion that the shallow thread 2 of back segment is screwed into is relatively steady, and reduce the torsion that bears that is screwed into apparatus.Thereby, this design of the present utility model can reduce the torsion that is screwed into and back-outs that shallow thread 2 and deep thread 3 increase because of reducing, and (experimental data shows, follow and have self tapping groove to compare without self tapping groove, the torsion being screwed into and back-out differs 10%～30%), the torque value having born while therefrom having reduced nail bar and supporting instrumentation, has improved the fatigue limit that nail bar and supporting apparatus bear, and can reduce operation easier, reduce operating time, improve operation efficiency and success rate of operation.In addition, the design of the transition screw thread 5 between its shallow thread 2 and deep thread 3, can reduce on the one hand the difficulty of processing of this bone screw, can reduce on the other hand shallow thread 2 in operation process, with the junction between deep thread 3, the risk rupturing occur.
In the time that medical worker uses bone screw of the present utility model to carry out operation technique, should note following some: one, before operation technique, skilled operating process of the present utility model; Two,, when operation technique, note patient's position, facilitating operation technique, to patient without sense of discomfort as principle; Three, about operative incision: vertical or horizontal otch, size incision should be able to be put into implant, obtains surgical field of view clearly; Four, separate subcutaneous tissue and muscle, expose diseased region; Five, select a kind of bone screw of the present utility model, take appropriate length as prerequisite, be screwed into nail road with bottle opener.
Above-described embodiment is only used for further illustrating a kind of bone screw of the present utility model; but this utility model is not limited to embodiment; any simple modification, equivalent variations and modification that every foundation technical spirit of the present utility model is done above embodiment, all fall in the protection domain of technical solutions of the utility model.
Claims (9)
1. bone screw, comprises the screw body of rod, and this screw body of rod is provided with screw thread, and this screw thread comprises interconnective leading portion screw thread and back segment screw thread, and leading portion screw thread is deep thread, and back segment screw thread is shallow thread; Shallow thread is identical with the external diameter of deep thread, and the internal diameter of shallow thread is greater than the internal diameter of deep thread; It is characterized in that: the front position of shallow thread is provided with self tapping groove.
2. bone screw according to claim 1, it is characterized in that: the screw thread on the described screw body of rod also comprises the transition screw thread between described shallow thread and deep thread, the two ends of this transition screw thread interconnect with described shallow thread and deep thread respectively, this transition screw thread is identical with the external diameter of described shallow thread, the internal diameter of this transition screw thread is between the internal diameter of described shallow thread and the internal diameter of described deep thread, and direction along described shallow thread to deep thread is successively decreased gradually.
3. bone screw according to claim 1, is characterized in that: the screw thread on the described screw body of rod is double thread.
4. bone screw according to claim 1, is characterized in that: described self tapping groove is variable-diameter structure.
5. bone screw according to claim 4, is characterized in that: the radial dimension of described self tapping groove successively decreases gradually along described shallow thread front end to the direction of its rear end.
6. bone screw according to claim 5, is characterized in that: the groove face of described self tapping groove is cambered surface.
7. bone screw according to claim 2, is characterized in that: the bar wall of the screw body of rod of described transition screw thread position is inclined-plane, and the slope on this inclined-plane is 1 °～20 °.
8. bone screw according to claim 2, is characterized in that: the length of described shallow thread, transition screw thread, deep thread accounts for respectively 2/5,1/5,2/5 of total reach.
9. bone screw according to claim 1, is characterized in that: the length of described self tapping groove accounts for 1/5～1/2 of described shallow thread total length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320859233.8U CN203662887U (en) | 2013-12-24 | 2013-12-24 | Bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320859233.8U CN203662887U (en) | 2013-12-24 | 2013-12-24 | Bone screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203662887U true CN203662887U (en) | 2014-06-25 |
Family
ID=50959228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320859233.8U Expired - Lifetime CN203662887U (en) | 2013-12-24 | 2013-12-24 | Bone screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203662887U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103800066A (en) * | 2013-12-24 | 2014-05-21 | 厦门大博颖精医疗器械有限公司 | Bone screw |
-
2013
- 2013-12-24 CN CN201320859233.8U patent/CN203662887U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103800066A (en) * | 2013-12-24 | 2014-05-21 | 厦门大博颖精医疗器械有限公司 | Bone screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 361022 No. 218, Xiang Xiang Road, Haicang District, Fujian, Xiamen Patentee after: DOUBLE MEDICAL TECHNOLOGY Inc. Address before: 361022 No. 218, Xiang Xiang Road, Haicang District, Fujian, Xiamen Patentee before: XIAMEN DOUBLE ENGINE MEDICAL MATERIAL Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190513 Address after: No. 18 Shanbian Hongdong Road, Haicang District, Xiamen City, Fujian Province, 361000 Co-patentee after: BOYINING (XIAMEN) MEDICAL APPARATUS AND INSTRUMENTS CO.,LTD. Patentee after: DOUBLE MEDICAL TECHNOLOGY Inc. Address before: 361022 No. 218 Houxiang Road, Haicang District, Xiamen City, Fujian Province Patentee before: DOUBLE MEDICAL TECHNOLOGY Inc. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140625 |