Anatomical bone fracture plate for anterior inner side nodule of proximal humerus

Abstract

The utility model relates to a bone fracture plate for anatomy of a proximal humerus anterior medial nodule. The bone fracture plate comprises a main body, a proximal end and a distal end, the near end, the main body and the far end are integrally formed, the near end can be bent downwards, the main body can be bent by a certain curvature, the curvature is consistent with the curvature of the humerus shape, and the near end and the main body are jointly clung to the front inner side of the humerus near end; the distal end has a reconstruction structure that can be twisted and / or bent to match the proximal humeral anterior medial anatomy. Due to the anatomical design of the bone fracture plate, the bone fracture plate is tightly attached to the bone surface, and fixation is firm.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an anatomical bone fracture plate for the anterior medial tubercle of the proximal humerus. Background Art

[0002] Proximal humeral fractures are common types of humeral fractures. Neer classification of three-part or four-part proximal humeral fractures is an unstable proximal humeral fracture. With the aging of the population, the incidence of such unstable fractures is increasing year by year.

[0003] Open reduction and internal fixation of three-part or four-part proximal humeral fractures is difficult and is prone to complications such as proximal humeral varus deformity and humeral head necrosis. However, since open reduction and internal fixation are significantly better than joint replacement, and the support of the proximal medial column of the humerus can offset some of the varus stress and help avoid postoperative displacement of the fracture end, open reduction and internal fixation is still the first choice for unstable proximal humeral fractures. Therefore, how to reconstruct the support structure of the proximal medial column of the humerus and improve the success rate of internal fixation is one of the current challenges.

[0004] Theoretically, the double plate technique can effectively increase the stability of the fracture end and improve the torsion resistance. However, there is no corresponding medial anatomical plate at present. Only the distal radial plate or metacarpal plate can be bent and used as a substitute. However, as a substitute plate, bending it may affect the strength of the plate and the mechanical stability of the fracture end, and there are still few relevant research papers. Theopold first proposed a fixation method of placing a lateral plate combined with an anterior plate, but the plate was placed in the intertubercular groove, which would cause irritation of the long head of the biceps tendon. In addition, unstable fractures of the proximal humerus in three or four parts are often accompanied by fracture displacement of the lesser tuberosity of the humerus. Therefore, it is urgent to find an anatomical fixation plate that is effective and easy to place. Utility Model Content

[0005] In order to solve the above technical problems, the utility model discloses an anatomical bone plate for the anterior medial tubercle of the proximal humerus. The bone plate is of deformable design and comprises: a main body, a proximal end and a distal end; the proximal end, the main body and the distal end are integrally formed, the proximal end can be bent downward, the main body can be bent to a certain curvature, the curvature is consistent with the curvature of the humerus morphology, the proximal end and the main body together are tightly attached to the anterior medial side of the proximal humerus; the distal end has a reconstruction structure, and the reconstruction structure can be twisted and / or bent to match the anatomical morphology of the anterior medial side of the proximal humerus.

[0006] Preferably, the angle of the downward bend of the proximal end is in the range of 7 to 13°.

[0007] Preferably, the distal end twisting angle ranges from 17 to 23°.

[0008] Preferably, the angle of the distal bend ranges from 17 to 23°.

[0009] Preferably, bending grooves are provided on both sides of the distal end.

[0010] Preferably, the proximal end is provided with a universal hole, and the adjustable angle range of the screw in the universal hole is 0 to 20°.

[0011] Preferably, the diameter of the screw body is 2.7 mm.

[0012] Preferably, at least one combining hole is provided on the distal end or the main body.

[0013] Preferably, the combining holes include locking nail holes and pressure nail holes.

[0014] Preferably, the inner hole of the locking nail hole can be any of unthreaded, fully threaded or semi-threaded.

[0015] Preferably, the length of the bone plate is less than or equal to 6 cm.

[0016] Preferably, the edge of the bone plate is chamfered, and the thickness of the edge of the bone plate is less than the thickness in the middle of the bone plate.

[0017] The present application discloses an anatomical plate for the anterior medial tubercle of the proximal humerus, which is specially designed for fixation of the proximal medial column of the humerus, taking into account the fixation of the lesser tubercle and the medial column. The anatomical design of the plate allows the plate to fit tightly to the bone surface and be firmly fixed. The plate of the present application can fit the bone surface more easily according to the bending and deformation of fractures of different forms, which is more conducive to the fixation of the anterior medial side of the proximal humerus. In addition, chamfers are set on the edges of the plate to make the edges smoother and the notches lower, reducing irritation to the soft tissue. The distal length is controlled to be less than 6cm, without damage to the muscle, nerve and blood vessel bundles. 2.7mm screws can effectively support and fix the lesser tubercle and humeral head, reducing interference with the articular surface. The screw hole at the proximal end is designed as a universal structure, and the screws can be inserted at multiple angles to facilitate fracture fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 The shape of the anterior medial tubercle of the proximal humerus of the present application before bending Figure 1 ;

[0020] Figure 2This is the bent shape of the bone plate of this application. Figure 1 ;

[0021] Figure 3 This is the bent shape of the bone plate of this application. Figure 2 ;

[0022] Figure 4 This is the bent shape of the bone plate of this application. Figure 3 ;

[0023] Figure 5 It is a partial view of the distal end of the bone plate of the present application;

[0024] Figure 6 It is an AA cross-sectional view of a local view of the distal end of the bone plate of the present application and a schematic view after the locking nail is inserted;

[0025] Figure 7 It is a schematic diagram of adjusting the direction of the screw of the present application when it is inserted into the universal hole.

[0026] In the figure, 1-proximal end, 2-distal end, 3-main body, 4-locking nail hole, 5-compression nail hole. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0028] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here.

[0029] The present application provides an anatomical bone plate for the anterior medial tubercle of the proximal humerus, comprising an integral main body 3, a proximal end 1 and a distal end 2. The bone plate is a deformable design, and the bone plate of the present application can be bent in advance to a shape that matches the patient's bones, fixed to the proximal medial column of the humerus, taking into account the fixation of the tubercle and the medial column, and adapting to the bone fixation requirements of different humeral morphologies.

[0030] Please refer to Figure 2-4 Before use, the proximal end 1 of the bone plate of the present application can be bent downward, and the main body 3 can also be bent to a certain curvature, keeping the curvature consistent with the curvature of the humerus morphology, and more closely fitting the humerus morphology, so that the proximal end 1 and the main body 3 are tightly attached to the anterior medial side of the proximal humerus after being bent to a certain degree; the distal end 2 has a reconstructed structure, which can be twisted left or right and / or bent up or down to match the anatomical morphology of the anterior medial side of the proximal humerus.

[0031] For example, the angle range of the proximal end 1 bending downward can be adjusted, and the maximum bending angle can be 10±3°; the distal end 2 can be twisted to the left or right to 20±3°, and the distal end 2 can also be bent upward or downward to 20±3° while twisting. Such a deformation design can be bent and deformed according to different forms of fractures, and it is easier to fit the bone surface, which is conducive to the fixation of the anterior medial side of the proximal humerus.

[0032] In some feasible solutions, the proximal end 1 is further provided with a through universal hole, and the number of the universal holes may be 4, and different universal holes are diagonally distributed or staggered. Figure 7When the screw is inserted into one of the universal holes, the bone plate can be universally adjusted from the initial position within 20°; it can also be adjusted in the direction of the screw when it is inserted into the universal hole. The multi-angle insertion of the screw makes the fixation direction of the fracture more operable.

[0033] Exemplarily, the diameter of the screw body is φ2.7 mm, which can effectively support and fix the lesser tuberosity and the humeral head and reduce interference with the articular surface.

[0034] In some feasible solutions, the bone plate is provided with at least one combination hole outside the proximal end 1, and the combination hole includes a locking nail hole and a compression nail hole. The inner hole of the locking nail hole can be any of unthreaded, fully threaded or semi-threaded. Specifically, the unthreaded structure screw can realize the compression of the fracture end, the fully threaded structure screw can realize the fixed angle locking, and the semi-threaded structure screw can realize the compression or angle locking according to the selection. Therefore, by setting the thread inside the locking nail hole, it can adapt to the insertion of different screws and meet different fixation requirements.

[0035] Exemplarily, the half thread may be provided with a thread at the lower portion of the locking nail hole.

[0036] In some feasible solutions, bending grooves are further provided on both sides of the distal end 2, so that when the bone plate does not fit snugly against the anterior medial side of the proximal humerus, the bone plate can be further bent and shaped.

[0037] In some feasible solutions, the length of the bone plate is controlled to be less than 6 cm, so as to avoid damaging the muscle, nerve and blood vessel bundles during fixation.

[0038] In some feasible schemes, the edge of the bone plate is chamfered. On the one hand, the thickness of the edge of the bone plate is made smaller than the thickness in the middle of the bone plate. On the other hand, the larger the chamfer, the smoother the edge, the lower the notch, and the less irritation to the soft tissue.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anatomical bone plate for the lesser tubercle of the proximal humerus, characterized in that: The bone plate is of deformable design, comprising: a main body (3), a proximal end (1) and a distal end (2); the proximal end (1), the main body (3) and the distal end (2) are integrally formed, the proximal end (1) can be bent downward, the main body (3) can be bent to a certain curvature, the curvature is consistent with the curvature of the humerus, the proximal end (1) and the main body (3) are together closely attached to the anterior medial side of the proximal end of the humerus; the distal end (2) has a reconstruction structure, and the reconstruction structure can be twisted and / or bent to match the anterior medial anatomical shape of the proximal end of the humerus.

2. The bone fracture plate according to claim 1, characterized in that: The angle of the proximal end (1) bent downward is in the range of 0 to 13°.

3. The bone fracture plate according to claim 1, characterized in that: The twisting angle of the distal end (2) ranges from 0 to 23°.

4. The bone fracture plate according to claim 1, characterized in that: The bending angle of the distal end (2) ranges from 0 to 23°.

5. The bone fracture plate according to claim 1, characterized in that: Bending grooves are provided on both sides of the distal end (2).

6. The bone plate according to claim 1, characterized in that: The proximal end (1) is provided with a universal hole, and the angle range of the screw that can be adjusted in the universal hole is 0 to 20 degrees.

7. The bone fracture plate according to claim 1, characterized in that: At least one combining hole is provided on the distal end (2) or the main body (3).

8. The bone plate according to claim 7, characterized in that: The combining hole comprises a locking nail hole (4) and a pressurizing nail hole (5).

9. The bone plate according to claim 8, characterized in that: The inner hole of the locking nail hole (4) can be any of unthreaded, fully threaded or semi-threaded.

10. The bone fracture plate according to claim 6, characterized in that: The length of the bone plate is less than or equal to 6 cm.

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