CN103800066A - Bone screw - Google Patents
Bone screw Download PDFInfo
- Publication number
- CN103800066A CN103800066A CN201310722473.8A CN201310722473A CN103800066A CN 103800066 A CN103800066 A CN 103800066A CN 201310722473 A CN201310722473 A CN 201310722473A CN 103800066 A CN103800066 A CN 103800066A
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- Prior art keywords
- thread
- screw
- shallow
- deep
- transition
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B17/865—Packages or dispensers for bone screws or threaded wires
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses a bone screw which comprises a screw rod body. Threads are arranged on the screw rod body. The threads include the front-segment thread and the rear-segment thread, wherein the front-segment thread and the rear-segment thread are mutually connected. The front-segment thread is a deep thread, and the rear-segment thread is a shallow thread. The outer diameter of the shallow thread and the outer diameter of the deep thread are equal, and the inner diameter of the shallow thread is larger than the inner diameter of the deep thread. The front end of the shallow thread is provided with a self-tapping groove. According to the bone screw, due to the fact that the self-tapping groove is designed, screw-in and screw-out torsion increased due to reducing of the shallow thread and the deep thread can be reduced, and therefore operation time can be reduced, the operation efficiency and the operation successful rate can be improved, and the risks of nail breaking or device damage are reduced.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, particularly relate 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.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art, a kind of bone screw is provided.
The technical solution adopted for the present invention to solve the technical problems is: 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, 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 invention has the beneficial effects as follows:
1, owing to being provided with self tapping groove in the front position of shallow thread, make the present invention 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, the present invention 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 the present invention 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 the present invention 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, the present invention is described in further detail; But a kind of bone screw of the present invention is not limited to embodiment.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
The specific embodiment
Embodiment, shown in Figure 1, a kind of bone screw of the present invention, 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 invention, 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 invention 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 invention to carry out operation technique, should note following some: one, before operation technique, skilled operating process of the present invention; 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 invention, 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 invention; but the present invention is not limited to embodiment; any simple modification, equivalent variations and modification that every foundation technical spirit of the present invention is done above embodiment, all fall in the protection domain of technical solution of the present invention.
Claims (9)
1. a 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 |
|---|---|---|---|
| CN201310722473.8A CN103800066A (en) | 2013-12-24 | 2013-12-24 | Bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310722473.8A CN103800066A (en) | 2013-12-24 | 2013-12-24 | Bone screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103800066A true CN103800066A (en) | 2014-05-21 |
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ID=50697791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310722473.8A Pending CN103800066A (en) | 2013-12-24 | 2013-12-24 | Bone screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103800066A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112022317A (en) * | 2020-09-11 | 2020-12-04 | 新疆医科大学第一附属医院 | Spine full-cortical bone thread reducing screw and spine positioning and orienting device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080234675A1 (en) * | 2004-02-02 | 2008-09-25 | Branemark Integration Ab | Anchoring Element, Dental Anchoring Member, and Dental Anchorning Unit |
| CN101297772A (en) * | 2008-06-12 | 2008-11-05 | 方巍 | Pipe sleeve anti-rotary dentistry implant |
| CN203089336U (en) * | 2012-12-27 | 2013-07-31 | 苏州欣荣博尔特医疗器械有限公司 | Spine screw |
| US20130253517A1 (en) * | 2012-03-26 | 2013-09-26 | Spartek Medical, Inc. | System and method for creating a bore and implanting a bone screw in a vertebra |
| CN203662887U (en) * | 2013-12-24 | 2014-06-25 | 厦门大博颖精医疗器械有限公司 | Bone screw |
-
2013
- 2013-12-24 CN CN201310722473.8A patent/CN103800066A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080234675A1 (en) * | 2004-02-02 | 2008-09-25 | Branemark Integration Ab | Anchoring Element, Dental Anchoring Member, and Dental Anchorning Unit |
| CN101297772A (en) * | 2008-06-12 | 2008-11-05 | 方巍 | Pipe sleeve anti-rotary dentistry implant |
| US20130253517A1 (en) * | 2012-03-26 | 2013-09-26 | Spartek Medical, Inc. | System and method for creating a bore and implanting a bone screw in a vertebra |
| CN203089336U (en) * | 2012-12-27 | 2013-07-31 | 苏州欣荣博尔特医疗器械有限公司 | Spine screw |
| CN203662887U (en) * | 2013-12-24 | 2014-06-25 | 厦门大博颖精医疗器械有限公司 | Bone screw |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112022317A (en) * | 2020-09-11 | 2020-12-04 | 新疆医科大学第一附属医院 | Spine full-cortical bone thread reducing screw and spine positioning and orienting device |
| CN112022317B (en) * | 2020-09-11 | 2024-06-14 | 新疆医科大学第一附属医院 | Full cortex bone screw thread reducing screw of backbone and backbone positioning orientation device |
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| CB02 | Change of applicant information |
Address after: 361022 No. 218, Xiang Xiang Road, Haicang District, Fujian, Xiamen Applicant after: DABO MEDICAL TECHNOLOGY CO., LTD. Address before: 361022 No. 218, Xiang Xiang Road, Haicang District, Fujian, Xiamen Applicant before: Double Engine Medical Material Co., Ltd. |
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| COR | Change of bibliographic data | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140521 |