CN218391245U - Pressure bone nail - Google Patents
Pressure bone nail Download PDFInfo
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- CN218391245U CN218391245U CN202221984532.XU CN202221984532U CN218391245U CN 218391245 U CN218391245 U CN 218391245U CN 202221984532 U CN202221984532 U CN 202221984532U CN 218391245 U CN218391245 U CN 218391245U
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Abstract
The present application relates to a compression bone screw. The compression bone screw comprises a cylinder body extending from a proximal end to a distal end, and the cylinder body is provided with external threads for screwing into and screwing with the bone. The external thread comprises a first section consisting of a plurality of first threads with the same structure, the first threads are distributed at intervals along the axial direction of the column body, and a first thread groove is formed between every two adjacent first threads. The width of the groove bottom of the first tooth grooves decreases in sequence along the direction from the proximal end to the distal end. So, on the one hand, can guarantee the pressurization effect of pressurization bone nail, on the other hand, the cusp width of first thread can not be because of the increase of pressurization design needs, can reduce the screw in moment of torsion of pressurization bone nail to a certain extent effectively, avoids appearing that operator's arm is tired, fracture piece is easily driven rotatory or the inefficacy scheduling problem that resets.
Description
Technical Field
The application relates to the technical field of medical equipment, in particular to a pressurizing bone nail.
Background
Compression screws are commonly used for fixation of fractures or fragments of small bones, but also for orthopedic procedures such as arthrodesis, fracture repair or osteotomy, for example, for clavicle, humerus, radius, ulna, ilium, femur, patella, fibula, tibia, talus, ankle or calcaneus.
However, the conventional compression screw has the problems of large screwing torque, easy arm fatigue of an operator, easy driving rotation or resetting failure of a fracture block and the like.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide a compression bone screw which can effectively reduce the screwing torque in order to solve the problem that the screwing torque of the conventional compression screw is large.
A compression bone screw comprises a cylinder extending from a proximal end to a distal end, wherein the cylinder is provided with an external thread for screwing in and screwing on a bone;
the external thread comprises a first section consisting of a plurality of first threads with the same structure, the first threads are distributed at intervals along the axial direction of the column body, and a first thread groove is formed between every two adjacent first threads;
along the direction from the near end to the far end, the widths of the groove bottoms of the first tooth grooves are reduced in sequence;
wherein the groove bottom width of the first tooth groove is the dimension of the groove bottom of the first tooth groove along the axial direction of the column body.
In one embodiment, the external thread further comprises a second section adjacent to the first section;
the second section comprises a plurality of second threads which are arranged at intervals along the axial direction of the column and have the same structure, and a second thread groove is formed between every two adjacent second threads;
in a direction from the proximal end to the distal end, a width of a groove bottom of the second tooth grooves decreases in sequence;
the width of the bottom of the second tooth socket is the size of the bottom of the second tooth socket along the axial direction of the column.
In one embodiment, the first section is closer to the proximal end than the second section;
the lead of the first section is greater than the lead of the second section.
In one embodiment, the first thread comprises a first tip portion arranged at a distance from the cylinder in a radial direction of the cylinder;
the second screw thread comprises a second thread tip part arranged at intervals with the cylinder along the radial direction of the cylinder;
the cusp width of the first cusp portion is equal to the cusp width of the second cusp portion;
wherein, the cusp width of first cusp portion does first cusp portion is in following the ascending size of axis direction of cylinder, the cusp width of second cusp portion does second cusp portion is in following the ascending size of axis direction of cylinder.
In one embodiment, the cusp width of the first cusp portion and the cusp width of the second cusp portion are each 0.6 to 0.8mm.
In one embodiment, the outer diameter of the second section is smaller than the outer diameter of the first section.
In one embodiment, the first section has a dimension L in a direction along the axis of the column 1 The dimension of the second section along the axis of the column is L 2 The dimension of the external thread along the axial direction of the cylinder is L 0 ；
Wherein L is 1 +L 2 ≥2/3L 0 。
In one embodiment, the width of the groove bottom of the second tooth grooves in the second section decreases linearly from the proximal end to the distal end.
In one embodiment, the width of the bottom of the first tooth socket in the first section decreases linearly in the direction from the proximal end to the distal end.
In one embodiment, the external thread is configured as a multiple start thread.
Above-mentioned pressurization bone nail, the great department of helical pitch is more close to the near-end on the first section of external screw thread, be favorable to the screw in of pressurization bone nail, and the less department of helical pitch is more close to the distal end on the first section of external screw thread, it is fixed with the pressurization of bone tissue more to be favorable to pressurization bone nail, and because the structure of a plurality of first threads is the same in the first section, can make the cusp width of first thread keep unchangeable, and thus, on the one hand, can guarantee the pressurization effect of pressurization bone nail, on the other hand, the cusp width of first thread can not need the increase because of the pressurization design, can reduce the screw in moment of torsion of pressurization bone nail to a certain extent effectively, avoid appearing operator's arm tired, the fracture piece is easily driven rotation or the inefficacy scheduling problem that resets.
Drawings
FIG. 1 shows a schematic view of a compression bone screw according to an embodiment of the present application;
FIG. 2 shows a partially enlarged schematic view of FIG. 1;
FIG. 3 illustrates a schematic view of a compression bone screw in an embodiment of the present application;
FIG. 4 shows an enlarged schematic view at A of FIG. 3;
fig. 5 shows an enlarged schematic view at B of fig. 3.
In the figure: 10. pressurizing the bone nail; 110. a cylinder; 111. a proximal end; 112. a distal end; 120. an external thread; 121. a first section; 1211. a first screw thread; 1212. a first socket; 122. a second section; 1221. a second screw thread; 1222. a second socket.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.
As a result of research, the inventor of the present application found that, in a conventional compression screw, in order to improve the compression effect of the compression screw, the compression screw is generally designed such that the socket width and the root width both decrease gradually along the longitudinal direction of the compression screw (socket width refers to the dimension of a groove formed between two adjacent threads of the compression screw along the longitudinal direction of the compression screw, and root width refers to the dimension of a portion of a thread of the compression screw closest to the central axis of the compression screw in the radial direction of the compression screw along the longitudinal direction of the compression screw), which may cause a problem that the tip width of the thread needs to be made larger (tip width refers to the dimension of a portion of the thread of the compression screw closest to the central axis of the compression screw in the radial direction of the compression screw along the longitudinal direction of the compression screw) if the radial dimensions of a plurality of threads are to be consistent, which may result in that the compression screw may have a larger contact area between the thread and a bone when the compression screw is used, which may cause a problem that an operator may easily feel tired of an arm, and a problem that a fracture block may be rotated or may be reset.
In order to solve the problem that the conventional compression screw has large screwing torque, the inventor of the application designs a compression bone screw through intensive research, the external thread of the compression bone screw comprises a first section, a first tooth socket is formed between two adjacent first teeth in the first section, the width of the bottom of the first tooth socket in the first section is sequentially reduced, and the structures of a plurality of first teeth in the first section are the same.
Fig. 1 shows a schematic view of a compression bone screw 10 according to an embodiment of the present application.
Referring to fig. 1 and 2, a compression bone screw 10 according to an embodiment of the present application includes a cylindrical body 110 extending from a proximal end 111 to a distal end 112, wherein the cylindrical body 110 is provided with an external thread 120 for screwing into and screwing into a bone. Generally, the proximal end 111 of the cylinder 110 refers to an end of the cylinder 110 near the site to be operated on when the pressurized bone screw 10 is screwed into the bone, and the distal end 112 of the cylinder 110 refers to an end of the cylinder 110 far from the site to be operated on when the pressurized bone screw 10 is screwed into the bone.
The external thread 120 includes a first section 121 composed of a plurality of first threads 1211 with the same configuration, the plurality of first threads 1211 are arranged at intervals along the axial direction of the cylinder 110, and a first thread groove 1212 is formed between two adjacent first threads 1211.
In a direction from the proximal end 111 toward the distal end 112, a width of a bottom of the plurality of first teeth slots 1212 decreases in sequence, and the width of the bottom of the first teeth slots 1212 is a dimension of the bottom of the first teeth slots 1212 in a direction along the axis of the cylinder 110.
So configured, the lead of the first section 121 of the external thread 120 decreases in sequence in the direction from the proximal end 111 to the distal end 112. Taking the external thread 120 as a single-thread example for explanation, it can be seen from the definition of the lead that the lead is equal to the thread pitch and the thread pitch is equal to the axial distance between the corresponding points of two adjacent threads on the pitch diameter, and the lead of the first section 121 of the external thread 120 is P 1 The width of the bottom of the first tooth groove 1212 is D 1 Root of the first screw thread 1211Width D 2 (the root width of the first thread 1211 is a dimension of the connection of the first thread 1211 with the cylindrical body 110 in the axial direction of the cylindrical body 110), then, P 1 ＝D 1 +D 2 Since the first threads 1211 in the first section 121 have the same structure, the root width D of the first thread 1211 in the first section 121 can be known 2 The lead P of the first section 121 of the external thread 120 remains constant 1 The width D of the groove bottom along with the first tooth groove 1212 1 Varying, as such, the lead P of the first section 121 of the external thread 120 in a direction pointing from the proximal end 111 to the distal end 112 1 And decreases in turn.
Then, the greater lead of the first section 121 of the external thread 120 is closer to the proximal end 111, which facilitates the screwing of the compression bone nail 10, and the lesser lead of the first section 121 of the external thread 120 is closer to the distal end 112, which further facilitates the compression fixation of the compression bone nail 10 and the bone tissue, and the configuration of the first threads 1211 in the first section 121 is the same, so that the tooth tip width D of the first threads 1211 can be increased 3 (the tooth tip width of the first screw tooth 1211 means the dimension of the part of the first screw tooth 1211 spaced from the cylinder 110 in the radial direction of the cylinder 110 in the axial direction of the cylinder 110) is kept unchanged, so that, on one hand, the pressurizing effect of the pressurized bone nail 10 can be ensured, and on the other hand, the tooth tip width of the first screw tooth 1211 cannot be increased due to the pressurizing design requirement, the screwing-in torque of the pressurized bone nail 10 can be effectively reduced to a certain extent, and the problems that an operator is tired of arms, and a bone fracture block is easily driven to rotate or reset to fail and the like are avoided.
It should be added that the external thread 120 may be a single thread or a multiple thread, and is not limited in particular.
In some embodiments of the present application, referring to fig. 3 to 5, the external thread 120 further includes a second section 122 adjacent to the first section 121, the second section 122 includes a plurality of second threads 1221 arranged at intervals along the axial direction of the cylinder 110 and having the same configuration, a second socket 1222 is disposed between two adjacent second threads 1221, the width of the bottom of the second socket 1222 decreases in a direction from the proximal end 111 to the distal end 112, and the width of the bottom of the second socket 1222 is the dimension of the bottom of the second socket 1222 in the axial direction of the cylinder 110.
The second section 122 of the external thread 120 has a lead P 2 The width of the bottom of the second tooth socket 1222 is D 4 The width of the root of the second thread 1221 is D 5 (the root width of the second thread 1221 is the dimension of the connection point of the second thread 1221 and the cylinder 110 in the axial direction of the cylinder 110), then, P 2 ＝D 4 +D 5 Since the plurality of second threads 1221 in the second section 122 have the same structure, it can be known that the root width D of the second threads 1221 in the second section 122 is equal to the root width D 5 The constant, constant lead P of the second section 122 of the external thread 120 2 Width D of the bottom of the second socket 1222 4 In this manner, the lead P of the second section 122 of the external thread 120 is varied in the direction from the proximal end 111 to the distal end 112 2 And decreases in sequence. And the width D of the cusp of the second thread 1221 6 (the cusp width of second screw tooth 1221 means that the radial direction of following cylinder 110 on the second screw tooth 1221 and the cylinder 110 interval set up the part along the ascending size of the axis direction of cylinder 110) keep unchanged, so, on the one hand, can guarantee the pressurization effect of pressurization bone nail 10, on the other hand, the cusp width of second screw tooth 1221 can not increase because of pressurization design needs, can reduce the screw in moment of torsion of pressurization bone nail 10 to a certain extent effectively, avoid appearing operator's arm acid and tired, the fracture piece is easily driven rotation or the inefficacy scheduling problem that resets.
In some embodiments of the present application, referring to fig. 3, the lead of the first section 121 is greater than the lead of the second section 122 when the first section 121 is closer to the proximal end 111 than the second section 122.
Lead P of first section 121 1 Greater than lead P of second section 122 2 It will be appreciated that the greater lead of the first section 121 closer to the proximal end 111 provides a better guarantee of the compression effect of the compression bone screw 10.
In the embodiment shown in fig. 1-5, the width of the bottom of the first tooth socket 1212 is greater than the width of the bottom of the second tooth socket 1222, and the width of the bottom of the first thread 1211 and the width of the bottom of the second thread 1221 are equal to each other 5 I.e. D 1 Greater than D 4 ，D 2 Greater than D 5 As mentioned above, P 1 ＝D 1 +D 2 ，P 2 ＝D 4 +D 5 It can be inferred that P 1 Greater than P 2 。
In some embodiments of the present application, the first thread 1211 includes a first crest portion spaced apart from the cylindrical body 110 in a radial direction of the cylindrical body 110, and the second thread 1221 includes a second crest portion spaced apart from the cylindrical body 110 in the radial direction of the cylindrical body 110, and a crest width of the first crest portion is equal to a crest width of the second crest portion. Wherein, the cusp width of the first cusp portion is the size of the first cusp portion in the axial direction along the column body 110, and the cusp width of the second cusp portion is the size of the second cusp portion in the axial direction along the column body 110.
It should be noted that the apical width of the first crest portion is equal to the apical width of the first screw thread 1211, and the apical width of the second crest portion is equal to the apical width of the second screw thread 1221.
The cusp width at first tooth point portion equals the cusp width at second tooth point portion, that is to say, the cusp width of first screw tooth 1211 equals the cusp width of second screw tooth 1221, so, from first district 121 to second district 122, the cusp width of screw tooth remains unchanged, can reduce the screw in moment of torsion that pressurizes bone nail 10 better, avoids appearing that operator's arm is tired, fracture piece is easily driven rotatory or the inefficacy scheduling problem that resets.
In some embodiments of the present application, the cusp width of the first cusp portion and the cusp width of the second cusp portion are each 0.6 to 0.8mm.
If the tooth tip width of the first tooth tip portion and the tooth tip width of the second tooth tip portion are too small, the strength of the first thread 1211 and the second thread 1221 may be affected, and if the tooth tip width of the first tooth tip portion and the tooth tip width of the second tooth tip portion are too large, the screwing torque of the compression bone screw 10 may be affected, and based on this, the tooth tip width of the first tooth tip portion and the tooth tip width of the second tooth tip portion need to be controlled within a suitable range, that is, 0.6 to 0.8mm, so that the strength of the first thread 1211 and the second thread 1221 may be ensured, and the screwing torque of the compression bone screw 10 may be effectively reduced.
In some embodiments of the present application, the outer diameter of the second section 122 is smaller than the outer diameter of the first section 121.
In this way, the outer diameter of the second section 122 further away from the proximal end 111 is smaller, so as to avoid an excessive pressure on the bone formation by the whole of the compression bone screw 10.
In some embodiments of the present application, referring to FIG. 3, first section 121 has a dimension L along the axis of cylinder 110 1 The dimension of the second section 122 along the axial direction of the column 110 is L 2 The dimension of the external thread 120 in the axial direction of the cylinder 110 is L 0 Wherein, L 1 +L 2 ≥2/3L 0 。
It can be seen that the ratio of the portion of the external thread 120 with gradually decreased lead to the overall length of the external thread 120 is greater than one half, which is beneficial to forming a better pressurization effect by using the portion of the external thread 120 with gradually decreased lead.
In some embodiments of the present application, the width of the groove bottom of the second plurality of tooth grooves 1222 in the second section 122 decreases linearly in a direction from the proximal end 111 to the distal end 112.
Thus, the lead of the second section 122 can be linearly decreased, which is favorable for forming a better pressurization effect by using the second section 122.
Specifically, the width of the bottom of the second tooth socket 1222 in the second section 122 decreases linearly by 0.07-0.08 mm.
The lead of the second section 122 can be gradually decreased, so that the compression effect of the compression bone nail 10 is ensured, and the strength of the compression bone nail 10 is improved.
In some embodiments of the present application, a width of a groove bottom of the first plurality of tooth grooves 1212 in the first section 121 decreases linearly in a direction from the proximal end 111 toward the distal end 112.
Thus, the lead of the first section 121 can be linearly decreased, which is beneficial to forming a better pressurization effect by using the first section 121.
Specifically, the width of the bottom of the first tooth socket 1212 in the first section 121 decreases linearly by 0.07-0.08 mm.
The lead of the first section 121 can be gradually decreased, so that the compression effect of the compression bone nail 10 can be ensured, and the strength of the compression bone nail 10 can be improved.
In some embodiments of the present application, the external threads 120 are configured as multiple start threads.
The external thread 120 comprises n parallel spiral lines, and n =2 is taken as an example for explanation, and the thread lead is 2 times of the thread pitch, so that compared with a single thread, the screwing-in time of the compression bone nail 10 can be shortened by a half, further the operation time can be effectively shortened, the fracture healing is facilitated, and the arm fatigue feeling of a doctor is also facilitated to be relieved. In a similar way, the external thread 120 is a multi-thread (n helical lines are arranged in parallel), the thread lead is n times of the thread pitch, and compared with a single thread, the screwing-in time of the pressurizing bone nail 10 can be shortened to 1/n of the screwing-in time corresponding to the single thread, so that the operation time can be effectively shortened, the healing of the fracture is facilitated, and the arm fatigue feeling of the doctor is also facilitated to be relieved.
In some embodiments of the present application, referring to fig. 1-5, a compression bone screw 10 according to an embodiment of the present application includes a shaft 110 extending from a proximal end 111 to a distal end 112, the shaft 110 having external threads 120 for threading into and into bone. The external thread 120 includes a first section 121 composed of a plurality of first threads 1211 with the same configuration, the plurality of first threads 1211 are arranged at intervals along the axial direction of the cylinder 110, and a first thread groove 1212 is formed between two adjacent first threads 1211. The width of the bottom of the first plurality of tooth sockets 1212 decreases in sequence in a direction from the proximal end 111 toward the distal end 112. The external thread 120 further includes a second section 122 adjacent to the first section 121, the second section 122 includes a plurality of second threads 1221 arranged at intervals along the axial direction of the cylinder 110 and having the same configuration, two adjacent second threads 1221 have a second tooth socket 1222 therebetween, and the width of the groove bottom of the plurality of second tooth sockets 1222 decreases in a direction from the proximal end 111 to the distal end 112. First section 121 is closer to proximal end 111 than second section 122, and the lead of first section 121 is greater than the lead of second section 122.
Therefore, on one hand, the pressurizing effect of the pressurizing bone nail 10 can be ensured, on the other hand, the tooth tip width of the first screw tooth 1211 and the tooth tip width of the second screw tooth 1221 cannot be increased due to the pressurizing design requirement, the screwing-in torque of the pressurizing bone nail 10 can be effectively reduced to a certain extent, and the problems that the arm of an operator is tired, a fracture block is easy to drive to rotate or reset to lose efficacy and the like are avoided.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A compression bone screw, characterized in that the compression bone screw comprises a cylinder extending from a proximal end to a distal end, the cylinder being provided with external threads for screwing into and screwing onto a bone;
the external thread comprises a first section consisting of a plurality of first threads with the same structure, the first threads are distributed at intervals along the axial direction of the column body, and a first thread groove is formed between every two adjacent first threads;
along the direction from the near end to the far end, the widths of the groove bottoms of the first tooth grooves are reduced in sequence;
wherein the groove bottom width of the first tooth groove is the dimension of the groove bottom of the first tooth groove along the axial direction of the column body.
2. The pressurized bone screw of claim 1, wherein the external thread further comprises a second section adjacent to the first section;
the second section comprises a plurality of second threads which are arranged at intervals along the axial direction of the column and have the same structure, and a second thread groove is formed between every two adjacent second threads;
in a direction from the proximal end to the distal end, a width of a groove bottom of the second tooth grooves decreases in sequence;
the width of the bottom of the second tooth socket is the size of the bottom of the second tooth socket along the axial direction of the column.
3. The pressurized bone screw of claim 2, wherein the first section is closer to the proximal end than the second section;
the lead of the first section is greater than the lead of the second section.
4. A pressurised bone screw according to claim 2, wherein the first screw thread comprises a first tip portion arranged at a distance from the cylindrical body in a radial direction of the cylindrical body;
the second screw thread comprises a second thread tip part arranged at intervals with the cylinder along the radial direction of the cylinder;
the cusp width of the first cusp portion is equal to the cusp width of the second cusp portion;
wherein, the cusp width of first cusp portion does first cusp portion is in following the ascending size of axis direction of cylinder, the cusp width of second cusp portion does second cusp portion is in following the ascending size of axis direction of cylinder.
5. The pressurized bone screw of claim 4, wherein the cusp width of the first cusp portion and the cusp width of the second cusp portion are each 0.6-0.8mm.
6. The compression bone screw of claim 2, wherein the second section has an outer diameter less than an outer diameter of the first section.
7. The compression bone screw of claim 2, wherein the first section has a dimension L along the axis of the post 1 The dimension of the second section along the axis of the column is L 2 The dimension of the external thread along the axial direction of the cylinder is L 0 ；
Wherein L is 1 +L 2 ≥2/3L 0 。
8. The pressurized bone screw of claim 2, wherein a width of a groove bottom of a plurality of the second flutes in the second section decreases linearly in a direction from the proximal end to the distal end.
9. The pressurized bone screw of any of claims 1-8, wherein a plurality of said first sockets in said first section have a slot bottom width that decreases linearly in a direction from said proximal end to said distal end.
10. A pressurised bone screw according to any one of claims 1 to 8, characterised in that the external thread is configured as a multiple thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221984532.XU CN218391245U (en) | 2022-07-29 | 2022-07-29 | Pressure bone nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221984532.XU CN218391245U (en) | 2022-07-29 | 2022-07-29 | Pressure bone nail |
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| Publication Number | Publication Date |
|---|---|
| CN218391245U true CN218391245U (en) | 2023-01-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221984532.XU Active CN218391245U (en) | 2022-07-29 | 2022-07-29 | Pressure bone nail |
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| CN (1) | CN218391245U (en) |
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- 2022-07-29 CN CN202221984532.XU patent/CN218391245U/en active Active
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