CN213372417U - Orthopedics tailorable locking screw - Google Patents
Orthopedics tailorable locking screw Download PDFInfo
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- CN213372417U CN213372417U CN202021917316.4U CN202021917316U CN213372417U CN 213372417 U CN213372417 U CN 213372417U CN 202021917316 U CN202021917316 U CN 202021917316U CN 213372417 U CN213372417 U CN 213372417U
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- nail
- locking
- main body
- tailorable
- nail head
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Abstract
The utility model provides an orthopedics tailorable locking screw, which adopts a main nail and a locking nail tail two-component design. In the fracture incision reduction internal fixation operation, after fracture reduction and the placement of a locking bone fracture plate are completed, an operator screws in a main nail of a cuttable locking screw under the guidance of a guider and intraoperative perspective monitoring, and screws in a locking nail tail to lock the main nail and the locking bone fracture plate after reaching a proper depth; the residual redundant part of the main nail outside the bone can be cut and removed by 'Ke' scissors. Realizes the three-step integration of drilling, tapping and screwing in screws, minimizes the influence of the operation on the bone, and can also shorten the operation room and reduce the risks in the operation.
Description
Technical Field
The utility model relates to the technical field of medical equipment, in particular to an orthopedics cutting locking screw which is a locking internal fixation screw used in cooperation with a locking bone fracture plate in a fracture operation.
Background
Bone fractures are a common disease in orthopedics, especially in traumatic orthopedics clinical work. If the fracture is not well treated, a series of early complications such as infection, important blood vessel injury, peripheral nerve injury, spinal cord injury, ischemic muscle contracture, fat embolism and the like can be caused; and long-term complications such as dropsy pneumonia, bedsore, urinary tract infection and calculus, traumatic ossification, joint stiffness, traumatic arthritis, delayed nerve injury, ischemic osteonecrosis, delayed deformity and the like, seriously affect the life quality of patients and even endanger life. When the fracture has obvious displacement or fracture lines affect the joint surface, incision reduction and internal fixation operation treatment are needed.
The incision reduction internal fixation operation of the fracture needs to expose the fracture broken ends under a specific operation approach and clear soft tissues and hematoma embedded and pressed between the fracture broken ends; the surgeon reduces the fracture by a technique or surgical instruments and then maintains the fracture reduction by using appropriate internal fixation materials. With the progress of science and technology and the development of material science, various novel internal fixation materials and instruments for fracture are also emerging. Provides convenience for operating doctors and provides possibility for accelerating the rehabilitation of fracture patients.
Among many internal fixation materials and devices, bone plates and screw systems certainly occupy a crucial place. In the material aspect, bone fracture plates and screw systems made of stainless steel, titanium alloy and the like are available. In the aspect of form, the traditional common bone fracture plate is developed into a pressurizing bone fracture plate, and then the traditional common bone fracture plate is developed into a limited contact type pressurizing bone fracture plate until a locking bone fracture plate appears; the development of the bone plate can be clearly seen. But the screw update is slightly delayed. The shape design of internal fixation screws, with the exception of the material, has been used for decades until locking bone plates have appeared with which a locking screw can be mated.
The locking bone plate and the screw system have the advantages that the screw tail and the bone plate screw hole are meshed through threads, so that the position and the angle between the locking screw and the locking bone plate are not easy to change, and the fracture reduction is favorably maintained. The locking bone plate and screw system are especially suitable for fractures of special parts, such as metaphyseal fractures of long tubular bones, such as humeral surgical neck fractures. Such fractures, where one end of the fracture is a long tubular bone and the other end is a heterosexual epiphyseal end; the epiphyseal part not only has weak cortical bone, but also has weak cancellous bone inside, which is a great challenge to the stability of the internal fixation device.
The locking bone plate and the screw system provide the best choice for treating the fractures of the special parts; however, due to the anatomical features of such fracture sites, surgeons are required to minimize bone damage when implanting internal fixation devices. In the use process of the locking bone fracture plate and screw system which are commonly used in clinic at present, an operator needs to drill a hole on a bone through a nail hole of the locking bone fracture plate under the assistance of a guider, a depth measuring tool measures the depth of the nail hole, a locking screw with corresponding length is selected, tapping is carried out and screwed into the locking screw, whether the depth of the screw is too short or penetrates out of a joint surface is checked in a perspective mode, and the bone fracture plate and the screw can be finally locked if no abnormal condition exists. In actual work, however, the depth of the nail hole is often required to be repeatedly measured and confirmed; even then, the screwed-in locking screws have an undesirable depth and need to be replaced empirically. In the process of repeatedly sounding and replacing screws, the disturbance and damage to bone around a nail track are increased undoubtedly, and the stability of an internal fixing instrument is negatively influenced.
Disclosure of Invention
For solving the problem that prior art exists, the utility model provides an orthopedics locking screw can be tailor realizes that the fracture opens among the internal fixation operation that resets, drilling, tapping, the three steps unifications of screw in screw during installation locking screw to locking screw that can be reliable.
Technical scheme
The orthopaedics cutting locking screw comprises a main screw component and a locking screw tail component;
the main nail component is an integral piece consisting of a nail body (1), a nail tail (2) and a nail head (3); the nail tail (2) and the nail head (3) are positioned at two ends of the nail body (1), the end part of the nail tail (2) is round and blunt and is provided with a self-tapping cutting edge, and the self-tapping nail tail can be screwed in and tapped at the same time in the screwing-in process; the cylindrical side surface of the nail body (1) is processed with threads (4), and the nail body (1) can be screwed into a bone through a nail hole of the locking bone fracture plate through a guider by the threads (4); the end surface of the nail head (3) is provided with a blind hole (5) arranged along the axis of the nail body (1); the section shape of the blind hole (5) is matched with the section shape of a tool for driving the main nail component to rotate from the outside;
the locking nail tail assembly is an integral piece consisting of a nail head main body (6), an internal thread (14) and an external thread (7); the nail head main body (6) is in a circular truncated cone shape, an external thread (7) is processed on the outer side surface of the nail head main body (6), and the external thread (7) has the same taper as the nail head main body (6) as a whole and is used for being meshed with a locking nail hole on a locking bone fracture plate; the nail head main body (6) is provided with a central axial through hole, an internal thread (14) is arranged in the axial through hole, and the internal thread (14) is matched with the thread (4) on the nail body (1); the end surface of the smaller diameter of the nail head main body (6) is provided with a slot, when the external thread (7) is meshed with the locking bone fracture plate, the nail head main body (6) near the slot deforms due to extrusion, and locking among the main nail component, the locking nail head component and the bone fracture plate nail hole is realized.
Furthermore, the nail head (3) is a cylinder with the same diameter as the nail body (1).
Further, the axial length of the blind hole (5) is shorter than the whole length of the main nail component, and the length difference is set to be the diameter of the nail body (1).
Furthermore, the section of the blind hole (5) is in a hexagonal star shape.
Furthermore, one end of the nail head main body (6) with smaller diameter is provided with a straight slot which is symmetrical relative to the central axis of the nail head main body (6), and the depth of the slot is more than half of the axial length of the nail head main body (6).
Furthermore, a fastening groove which is distributed in a cross shape is processed at the end with the larger diameter of the nail head main body (6) and is used for being matched with a spanner during locking.
Advantageous effects
The utility model provides a novel can cut out locking screw adopts main nail and locking nail tail two sets of part design. In the fracture incision reduction internal fixation operation, after fracture reduction and the placement of a locking bone fracture plate are completed, an operator screws in a main nail of a cuttable locking screw under the guidance of a guider and intraoperative perspective monitoring, and screws in a locking nail tail to lock the main nail and the locking bone fracture plate after reaching a proper depth; the residual redundant part of the main nail outside the bone can be cut and removed by 'Ke' scissors. Realizes the three-step integration of drilling, tapping and screwing in screws, minimizes the influence of the operation on the bone, and can also shorten the operation room and reduce the risks in the operation.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a side view of an orthopedic tailorable locking screw main nail assembly.
FIG. 2 is a side cross-sectional view of an orthopedic tailorable locking screw main nail assembly.
FIG. 3 is a side elevational view of the head of the orthopedic shearable locking screw main nail assembly.
Fig. 4 is a side view of an orthopedic shearable locking screw locking stud assembly.
Fig. 5 is a side cross-sectional view of an orthopedic shearable locking screw locking stud assembly.
Fig. 6 is a side elevational view of the head of the orthopedic shearable locking screw locking stud assembly.
FIG. 7 is a side view of the orthopedic tailorable locking screw main nail and locking head assembly in combination.
FIG. 8 is a side partial cross-sectional view of the orthopedic tailorable locking screw main nail and locking stud assembly in combination, with the locking stud assembly in a side cross-sectional view.
FIG. 9 is a side cross-sectional view of the orthopedic tailorable locking screw main nail and locking nail head assembly in combination.
Detailed Description
The following detailed description of the embodiments of the present invention provides a novel shearable locking screw, which is designed by two components, namely a main screw and a locking screw tail. In the fracture incision reduction internal fixation operation, after fracture reduction and the placement of a locking bone fracture plate are completed, an operator screws in a main nail of a cuttable locking screw under the guidance of a guider and intraoperative perspective monitoring, and screws in a locking nail tail to lock the main nail and the locking bone fracture plate after reaching a proper depth; the excess part of the main nail remaining outside the bone can be cut and removed by a 'k-shear' (an orthopedic surgical instrument). Realizes the three-step integration of drilling, tapping and screwing in screws, minimizes the influence of the operation on the bone, and can also shorten the operation room and reduce the risks in the operation.
The orthopaedics cutting locking screw comprises a main nail and a locking nail tail.
Main nail assembly of orthopaedic tailorable locking screw:
the main nail is an integral body, the outer diameter of the main nail is 3.5mm or 4.5mm commonly used for orthopedic cortical bone screws, and the tooth form adopts a self-tapping round tail form.
A side view of the primary staple assembly is shown in fig. 1. Comprises a nail body 1, a nail tail 2 with a self-tapping cutting edge and a nail head 3. The nail tail 2 is round and blunt and is provided with a self-tapping cutting edge, so that the nail tail can be screwed in and tapped at the same time in the screwing-in process. The surface of the nail body 1 is provided with a thread 4. The screw thread 4 of the nail body can be screwed into the bone through the nail hole of the locking bone fracture plate through the guider. The head 3 is shaped differently from a conventional "mushroom head" but is the same diameter as the shank. The blind hole 5 penetrating through the nail body and the nail head is arranged along the axis of the main nail from the end surface of the top head 3, as shown in figure 2, so that the strength of the main nail can be weakened to facilitate cutting in the operation, the axial length of the blind hole 5 is shorter than the whole length of the main nail but is close to the whole length of the main nail, the strength of the round and blunt self-tapping part of the nail tail 2 is ensured, and the requirements of the main nail component for facilitating cutting after being screwed in and fastened in the operation process can be met; since the main nail assembly has different outer diameters, which are often related to the depth of screwing-in and fastening of the main nail assembly, the axial length of the blind hole 5, which is shorter than the overall length of the main nail, can be designed as the diameter of the nail body 1. The side view of the head of the main nail assembly is shown in fig. 3, and the cross section of the nail body 1, the thread 4 and the blind hole 5 can be seen, wherein the cross section of the blind hole 5 is in a hexagonal star shape with six groups of driving planes for matching with a tool with a corresponding section shape when screwing in and screwing out. The hexagonal star-shaped groove and the through hole are matched with corresponding tools and have six groups of driving planes when being screwed in and out, and compared with a common hole groove, the hexagonal star-shaped groove and the through hole have the advantage of difficult abrasion failure; even if the through hole is deformed in the cutting process, parts of the six driving planes are damaged, and the residual driving planes can ensure that the screw can be smoothly taken out after the fracture is healed.
Locking stud assembly of orthopaedic cuttable locking screw:
the locking nail head is a whole body and is provided with a nail head main body, an internal thread and an external thread.
The side view of the locking nail head assembly is shown in fig. 4, the nail head main body 6 is in a circular truncated cone shape, edges 8 and 9 are edges of the outer surface of the circular truncated cone, an external thread 7 is machined on the outer surface of the nail head main body 6, and the whole external thread 7 has the same taper as that of the nail head main body 6; the external threads are adapted to engage locking pin holes in the locking bone plate and are tapered to provide a "wedging" action when engaged with the locking pin holes.
A side cross-sectional view of the locking stud assembly is shown in fig. 5. the stud body 6 has a central axial through bore forming the cross-section of the stud body 6 as 11, 12, and the axial through bore has an internal thread 14 therein, the internal thread 14 matching the thread 4 on the shank 1.
The end with smaller diameter of the locking nail head is provided with an axial slot 10 and an axial slot 13 which run through the internal thread 14 and the external thread 7, the axial slot 10 and the axial slot 13 are symmetrical relative to the axis of the nail head main body 6, and the depth of the slot is more than half of the axial length of the nail head main body 6. When the locking nail head external thread 7 is engaged with the locking bone fracture plate, the part of the locking nail head near the slot is deformed due to extrusion, and the locking among the main nail component, the locking nail head component and the bone fracture plate nail hole is realized.
A side view of the head of the locking head assembly is shown in fig. 6. At the end of the locking stud with the larger diameter, 4 fastening grooves 15, 16, 17, 18 are made, distributed crosswise, for the purpose of matching the socket wrench during locking.
The main nail component and the locking nail head component combination of the orthopaedics cutting locking screw comprises:
a side view of the assembled main spike assembly and locking spike assembly is shown in fig. 7. The screw thread 4 of the nail body 1 is screwed into the bone through the nail hole of the locking bone fracture plate through the guider. The locking nail head internal thread 14 is also screwed in through matching with the thread 4 of the nail body 1, the locking nail head external thread 7 is meshed with the locking bone fracture plate and screwed in, and when the locking nail head is locked, part of the main nail on the left side of the locking nail head is left in the bone to play a role in internal fixation; the part of the main nail on the right side of the locking nail head can be cut and removed.
Having shown and described embodiments of the present invention, it is to be understood that the above-described embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above-described embodiments without departing from the principles and spirit of the present invention.
Claims (7)
1. An orthopedics tailorable locking screw, its characterized in that: comprises a main nail component and a locking nail tail component;
the main nail component is an integral piece consisting of a nail body (1), a nail tail (2) and a nail head (3); the nail tail (2) and the nail head (3) are positioned at two ends of the nail body (1), the end part of the nail tail (2) is round and blunt and is provided with a self-tapping cutting edge, and the self-tapping nail tail can be screwed in and tapped at the same time in the screwing-in process; the cylindrical side surface of the nail body (1) is processed with threads (4), and the nail body (1) can be screwed into a bone through a nail hole of the locking bone fracture plate through a guider by the threads (4); the end surface of the nail head (3) is provided with a blind hole (5) arranged along the axis of the nail body (1); the section shape of the blind hole (5) is matched with the section shape of a tool for driving the main nail component to rotate from the outside;
the locking nail tail assembly is an integral piece consisting of a nail head main body (6), an internal thread (14) and an external thread (7); the nail head main body (6) is in a circular truncated cone shape, an external thread (7) is processed on the outer side surface of the nail head main body (6), and the external thread (7) has the same taper as the nail head main body (6) as a whole and is used for being meshed with a locking nail hole on a locking bone fracture plate; the nail head main body (6) is provided with a central axial through hole, an internal thread (14) is arranged in the axial through hole, and the internal thread (14) is matched with the thread (4) on the nail body (1); the end surface of the smaller diameter of the nail head main body (6) is provided with a slot, when the external thread (7) is meshed with the locking bone fracture plate, the nail head main body (6) near the slot deforms due to extrusion, and locking among the main nail component, the locking nail head component and the bone fracture plate nail hole is realized.
2. The orthopedic tailorable locking screw of claim 1, wherein: the nail head (3) is a cylinder with the same diameter as the nail body (1).
3. The orthopedic tailorable locking screw of claim 1, wherein: the axial length of the blind hole (5) is shorter than the whole length of the main nail component, and the length difference is set to be the diameter of the nail body (1).
4. The orthopedic tailorable locking screw of claim 1, wherein: the section of the blind hole (5) is in a hexagonal star shape.
5. The orthopedic tailorable locking screw of claim 1, wherein: the smaller end of the nail head main body (6) is provided with a straight slot which is symmetrical relative to the central axis of the nail head main body (6), and the depth of the slot is more than half of the axial length of the nail head main body (6).
6. The orthopedic tailorable locking screw of claim 1, wherein: the larger end of the nail head main body (6) is provided with fastening grooves distributed in a cross shape and used for being matched with a wrench during locking.
7. The orthopedic tailorable locking screw of claim 1, wherein: the outer diameter of the screw thread (4) of the nail body (1) adopts a 3.5mm or 4.5mm specification, and the tooth shape adopts a self-tapping round tail shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021917316.4U CN213372417U (en) | 2020-09-05 | 2020-09-05 | Orthopedics tailorable locking screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021917316.4U CN213372417U (en) | 2020-09-05 | 2020-09-05 | Orthopedics tailorable locking screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213372417U true CN213372417U (en) | 2021-06-08 |
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ID=76214777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021917316.4U Expired - Fee Related CN213372417U (en) | 2020-09-05 | 2020-09-05 | Orthopedics tailorable locking screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213372417U (en) |
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2020
- 2020-09-05 CN CN202021917316.4U patent/CN213372417U/en not_active Expired - Fee Related
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Granted publication date: 20210608 |