Far-end fixing block assembly and bridging internal fixing system
By designing a distal fixing block assembly, the problem of difficulty in distal fixing of shorter fractures is solved by using symmetrically arranged fixing holes and rotatable threaded sleeves, and a stronger fixing strength and more stable fracture fixing are achieved.
Patent Information
- Application Number
- CN202420355837.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-26
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-02-26
AI Technical Summary
The existing orthopedic internal fixation device is difficult to effectively fix when fixing the distal end of the fracture with a short length, which easily leads to rotation of the distal end of the fracture relative to the locking screw.
A distal fixing block assembly is designed, including a first fixing block and a second fixing block, each equipped with a fixing hole and a locking hole, equipped with a rotatable threaded sleeve, which can be arranged symmetrically along the axis of the bridge rod, and the limiting bridge rod rotates relative to the fixing block by interfering with the locking screw.
The distal fixation block assembly can be used for distal fixation of fractures of shorter length, improving the fixation strength of the distal end of the fracture and avoiding dislocation of the fracture block.
Smart Images
Figure CN222549313U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of orthopedic internal fixation instruments, in particular to a distal fixation block component and a bridging internal fixation system. Background Art
[0002] People are bound to suffer from accidental injuries and fractures in life. In order to avoid disability and affect normal life, medical technology researchers have developed a variety of products suitable for fracture reduction in different parts. At present, orthopedic internal fixation implants at home and abroad are mainly steel plates, intramedullary nails, straight, compression and anatomical plates, various self-locking and interlocking intramedullary nails, external fixators and other series of products. However, these internal fixation devices have shortcomings. The plate product surgery requires open reduction and fixation, and the periosteum is stripped. There are problems of stress shielding and stress concentration, which seriously affect bone healing. The intramedullary nail product surgery is complicated. Once the surgical interlocking is inaccurate, the operation will be difficult to implement. External fixators are usually not used as terminal fixation devices due to postoperative infection.
[0003] Although the existing bridging combined internal stent has improved the stress shielding and stress concentration problems, in order to ensure that when the fixing block is fixed to the distal end of the fracture by the locking screw, the distal end of the fracture will not rotate relative to the locking screw, at least two fixing holes need to be opened on the fixing block. In the existing technical solution, at least two fixing holes are arranged at intervals along the length direction of the bridging rod. However, when the distal end of the fracture is short, the existing fixing block cannot simultaneously install locking screws in the two fixing holes to fix it to the distal end of the fracture, which easily causes the distal end of the fracture to rotate relative to the locking screw. Therefore, it is necessary to design a distal fixing block assembly that can be suitable for fixing the distal end of a fracture with a short length. Utility Model Content
[0004] In view of the above problems in the prior art, the present application proposes a distal fixation block assembly and a bridging internal fixation system, which can be suitable for the distal fixation of fractures of shorter length.
[0005] One aspect of the utility model provides a distal fixing block assembly, the distal fixing block assembly comprising a first fixing block and a second fixing block, the first fixing block and the second fixing block are each provided with a fixing hole and a locking hole, a first threaded sleeve is provided on one side of the first fixing block, a second threaded sleeve is provided on one side of the second fixing block, the first threaded sleeve and the second threaded sleeve can both be rotatably sleeved on a bridge rod, and the fixing hole of the first fixing block and the fixing hole of the second fixing block can be symmetrically arranged on both sides of the bridge rod along the axis of the bridge rod;
[0006] The threaded sleeve is communicated with the locking hole on the fixed block, and when the threaded sleeve is sleeved on the bridging rod, the locking screw threadedly installed in the locking hole can interfere with the bridging rod to limit the rotation of the bridging rod relative to the fixed block.
[0007] As a further improvement of the above technical solution:
[0008] The above-mentioned distal fixing block assembly, further, is configured such that at least two of the first threaded sleeves are spaced apart on one side of the first fixing block, and at least two of the second threaded sleeves are spaced apart on one side of the second fixing block, and the first threaded sleeves and the second threaded sleeves can be rotatably sleeved on the bridging rod alternately in sequence.
[0009] The above-mentioned distal fixing block assembly further has an inner side wall of the fixing hole provided with an internal thread capable of cooperating with a fixing screw thread.
[0010] Another aspect of the present invention provides a bridging internal fixation system, wherein the bridging internal fixation system has the distal fixation block assembly as described above.
[0011] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the utility model can be achieved.
[0012] The utility model provides a distal fixing block assembly and a bridging internal fixation system, which have at least the following beneficial effects compared with the prior art: when the bridging internal fixation system is needed to fix the proximal and distal ends of a fracture, and the length of the distal end of the fracture is relatively short, the distal fixing block assembly is used to fix the bridging rod on the distal end of the fracture, firstly, the first threaded sleeve and the second threaded sleeve are both sleeved on the bridging rod, and the first threaded sleeve and the second threaded sleeve are both rotated relative to the bridging rod so that the fixing hole of the first fixing block and the fixing hole of the second fixing block fit different sides of the distal end of the fracture, and finally, two fixing screws are used to pass through the fixing hole of the first fixing block and the fixing hole of the second fixing block respectively to fix them on the distal end of the fracture, and then a locking screw is used to pass through the locking hole and cooperate with the locking hole thread to interfere with the bridging rod to limit the rotation of the bridging rod relative to the fixing block. Since the two fixing holes of the distal fixing block assembly are symmetrically arranged on both sides of the bridging rod along the axis of the bridging rod, that is, the two fixing holes are located at the same position along the axis of the bridging rod, compared with the existing fixing blocks with two fixing holes arranged at intervals along the length direction of the bridging rod, the distal fixing block assembly can be suitable for distal fixation of shorter fractures and multi-plane fixation of the distal fracture, which improves the fixation strength of the distal fracture and avoids displacement of fracture fragments.
[0013] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0015] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.
[0016] Figure 1 A schematic diagram showing the structure of a distal fixing block assembly provided by an embodiment of the utility model is shown;
[0017] Figure 2 A schematic structural diagram of a first fixing block of a distal fixing block assembly provided by an embodiment of the utility model is shown;
[0018] Figure 3 The schematic diagram of the structure of the second fixing block of the distal fixing block assembly provided by the embodiment of the utility model is shown.
[0019] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.
[0020] Description of reference numerals:
[0021] 100 - distal fixing block assembly, 110 - first fixing block, 111 - fixing hole, 112 - first threaded sleeve, 113 - locking hole, 120 - second fixing block, 121 - second threaded sleeve. DETAILED DESCRIPTION
[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0025] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0027] The utility model will be further described below in conjunction with the accompanying drawings.
[0028] The embodiment of the utility model provides a distal fixation block assembly 100, which can be applied to fix the distal end of a fracture of a shorter length.
[0029] See also Figure 1 , Figure 2 as well as Figure 3 The distal fixing block assembly 100 provided by the embodiment of the utility model comprises a first fixing block 110 and a second fixing block 120, each of which is provided with a fixing hole 111 and a locking hole 113, a first threaded sleeve 112 is provided on one side of the first fixing block 110, and a second threaded sleeve 121 is provided on one side of the second fixing block 120, the first threaded sleeve 112 and the second threaded sleeve 121 can be rotatably sleeved on the bridge rod, and the fixing hole 111 of the first fixing block 110 and the fixing hole 111 of the second fixing block 120 can be symmetrically arranged on both sides of the bridge rod along the axis of the bridge rod; the threaded sleeve is connected with the locking hole 113 on the fixing block where it is located, and when the threaded sleeve is sleeved on the bridge rod, the locking screw threadedly installed in the locking hole 113 can interfere with the bridge rod to limit the rotation of the bridge rod relative to the fixing block.
[0030] When the bridging internal fixation system provided by the embodiment of the utility model is needed to fix the proximal and distal ends of the fracture, and the length of the distal end of the fracture is short, the distal end fixing block assembly 100 is used to fix the bridging rod to the distal end of the fracture. First, the first threaded sleeve 112 and the second threaded sleeve 121 are both sleeved on the bridging rod, and the first threaded sleeve 112 and the second threaded sleeve 121 are both rotated relative to the bridging rod so that the fixing hole 111 of the first fixing block 110 and the fixing hole 111 of the second fixing block 120 fit the different sides of the distal end of the fracture. Finally, two fixing screws are used to pass through the fixing hole 111 of the first fixing block 110 and the fixing hole 111 of the second fixing block 120 to fix the distal end of the fracture. Then, a locking screw is used to pass through the locking hole 113 and the locking hole 113 is threadedly matched to interfere with the bridging rod to limit the rotation of the bridging rod relative to the fixing block.
[0031] Since the two fixing holes 111 of the distal fixing block assembly 100 provided in the embodiment of the utility model are symmetrically arranged on both sides of the bridging rod along the axis of the bridging rod, that is, the two fixing holes 111 are located at the same position along the axis of the bridging rod, compared with the existing fixing blocks with two fixing holes 111 arranged at intervals along the length direction of the bridging rod, the distal fixing block assembly 100 provided in the embodiment of the utility model can be suitable for the distal fixation of shorter fractures and multi-plane fixation of the distal fracture, which improves the fixation strength of the distal fracture and avoids displacement of fracture fragments.
[0032] The distal fixing block assembly 100 provided in the embodiment of the present utility model is specifically described in Figure 1 , Figure 2 as well as Figure 3At least two first threaded sleeves 112 are provided at intervals on one side of the first fixing block 110, and at least two second threaded sleeves 121 are provided at intervals on one side of the second fixing block 120. The first threaded sleeve 112 and the second threaded sleeve 121 can be alternately and rotatably sleeved on the bridging rod in sequence. The first threaded sleeve 112 and the second threaded sleeve 121 can be alternately and rotatably sleeved on the bridging rod in sequence, so that the connection force between the fixing block and the bridging rod can be more uniform. In this embodiment, the inner wall of the fixing hole 111 is provided with an internal thread that can cooperate with the locking screw thread. When the first fixing block 110 and the second fixing block 120 are fixedly installed, the fixing screw can cooperate with the internal thread of the inner wall of the fixing hole 111 and be fixed to the distal end of the fracture.
[0033] The embodiment of the utility model further provides a bridge internal fixation system, which has a distal fixation block assembly 100 provided in any of the above embodiments. The specific structure of the distal fixation block assembly 100 refers to the above embodiments. Since the bridge internal fixation system adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.
[0034] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0035] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.
Claims
1. A distal fixing block assembly, characterized in that: The distal fixing block assembly comprises a first fixing block and a second fixing block, each of the first fixing block and the second fixing block is provided with a fixing hole and a locking hole, a first threaded sleeve is provided on one side of the first fixing block, and a second threaded sleeve is provided on one side of the second fixing block, the first threaded sleeve and the second threaded sleeve can both be rotatably sleeved on the bridge rod, and the fixing hole of the first fixing block and the fixing hole of the second fixing block can be symmetrically arranged on both sides of the bridge rod along the axis of the bridge rod; The threaded sleeve is communicated with the locking hole on the fixed block, and when the threaded sleeve is sleeved on the bridging rod, the locking screw threadedly installed in the locking hole can interfere with the bridging rod to limit the rotation of the bridging rod relative to the fixed block.
2. The distal fixing block assembly according to claim 1, characterized in that: At least two first threaded sleeves are spaced apart on one side of the first fixing block, and at least two second threaded sleeves are spaced apart on one side of the second fixing block. The first threaded sleeves and the second threaded sleeves can be rotatably sleeved on the bridge rod alternately in sequence.
3. The distal fixing block assembly according to claim 1, characterized in that: The inner side wall of the fixing hole is provided with an internal thread which can be matched with the thread of the fixing screw.
4. A bridging internal fixation system, characterized in that: The bridging internal fixation system comprises the distal fixation block assembly according to any one of claims 1 to 3.