Condyle bone fracture plate

Abstract

The utility model relates to a condyle bone fracture plate which comprises a base plate, the base plate is provided with a vertical flat plate part and an inclined flat plate part which is arranged downwards and outwards in an inclined mode from one side of the middle of the vertical flat plate part, and the upper portion of the vertical flat plate part is provided with a plurality of upper positioning holes which are arranged at intervals up and down. A plurality of first lower positioning holes which are arranged at intervals up and down are formed in the lower part of the vertical flat plate part, and a plurality of second lower positioning holes which are arranged at intervals up and down are formed in the lower part of the inclined flat plate part; the lower end of the vertical flat plate part and the lower end of the inclined flat plate part are connected through a connecting plate part, and the connecting plate part, the vertical flat plate part and the inclined flat plate part jointly define an annular space. Due to the existence of the connecting plate part, the strength of the lower end of the bone fracture plate is increased, so that the overall fixing stability can be ensured even if the number of the first lower positioning holes is reduced, fixing screws can be reduced during an operation, the cost of a patient is saved, and trauma during the operation can be reduced.

Description

Technical Field

[0001] The utility model relates to a condylar bone plate for internal fixation during mandibular condylar neck fracture. Background Art

[0002] The mandible is the largest and most prominent bone in the maxillofacial region, and is vulnerable to injury. Whether in peacetime or wartime, its injury incidence rate is relatively high, ranking first among maxillofacial bone fractures. According to relevant domestic and foreign data statistics, the incidence rate of mandibular fractures accounts for 25% - 28% of the total maxillofacial injuries, and 55% - 72% of maxillofacial bone fractures. Among them, fractures of the mandibular condylar neck account for 21% of mandibular fractures. Currently, fractures at the mandibular condylar neck are all fixed with titanium plates, and the clinical effect is reliable.

[0003] For example, the Chinese utility model patent "Straight Mandibular Condylar Internal Fixation Titanium Plate" with the patent number ZL201822120129.2 (publication number CN209404926U) applied by the present applicant discloses such a straight mandibular condylar internal fixation titanium plate, which includes a titanium substrate. The titanium substrate has a vertical flat plate portion and an inclined flat plate portion that is inclined downward and outward from one side of the middle of the vertical flat plate portion. The upper part of the vertical flat plate portion is provided with 2 upper positioning holes that are spaced apart from each other vertically. The lower part of the vertical flat plate portion is provided with 3 first lower positioning holes that are spaced apart from each other vertically. The vertical flat plate portion between adjacent upper positioning holes and the first lower positioning holes constitutes a first connecting portion that straddles the bone crack. Among them, the upper positioning hole closest to the first lower positioning hole is arranged at the intersection position of the vertical flat plate portion and the inclined flat plate portion. The lower part of the inclined flat plate portion is provided with 2 second lower positioning holes that are spaced apart from each other vertically. The inclined flat plate portion between adjacent upper positioning holes and the second lower positioning holes constitutes a second connecting portion that straddles the bone crack.

[0004] In clinical use, how to increase the strength of the plate and reduce the trauma during surgery is the design idea that those skilled in the art need to possess. Therefore, the above patent can be further improved. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a condylar bone plate with a large positioning area, a more reasonable structural layout, higher strength, and capable of reducing the trauma during surgery in view of the above-mentioned prior art.

[0006] The technical solution adopted by the present utility model to solve the above technical problems is as follows: A condylar bone plate, including a substrate, the substrate has a vertical flat plate portion and an inclined flat plate portion that is inclined downward and outward from one side of the middle of the vertical flat plate portion. A plurality of upper positioning holes are provided at the upper part of the vertical flat plate portion and are arranged at intervals up and down. A plurality of first lower positioning holes are provided at the lower part of the vertical flat plate portion and are arranged at intervals up and down. The vertical flat plate portion between adjacent upper positioning holes and the first lower positioning holes constitutes a first connecting portion that straddles the bone fracture. A plurality of second lower positioning holes are provided at the lower part of the inclined flat plate portion and are arranged at intervals up and down. The inclined flat plate portion between adjacent upper positioning holes and the second lower positioning holes constitutes a second connecting portion that straddles the bone fracture; It is characterized in that: the lower end of the vertical flat plate portion and the lower end of the inclined flat plate portion are connected by a connecting plate portion, and the connecting plate portion, the vertical flat plate portion and the inclined flat plate portion jointly enclose an annular space.

[0007] The outer side surface of the above-mentioned connecting plate portion is a concave arc surface.

[0008] Preferably, there are two upper positioning holes, two first lower positioning holes and two second lower positioning holes respectively.

[0009] As an improvement, the above-mentioned vertical flat plate portion, inclined flat plate portion and connecting plate portion are an integral plate member. The integrity is better.

[0010] Preferably, the upper positioning hole closest to the first lower positioning hole is arranged at the staggered position of the vertical flat plate portion and the inclined flat plate portion. In this way, when arranging the upper positioning holes of the same grid, the overall length of the vertical plate portion can be shorter.

[0011] Further improvement, the lower part of the above-mentioned inclined flat plate portion has an inclined fixing portion that is further inclined downward and outward. The first included angle between the inclined fixing portion and the first connecting portion is greater than the second included angle between the second connecting portion and the first connecting portion. The second lower positioning hole is arranged on the inclined fixing portion, and the connecting plate portion is connected between the outer end of the inclined fixing portion and the lower end of the vertical flat plate portion. This structure can increase the coverage area of the internal fixation titanium plate, make the fixation more reliable, the length of the connecting plate portion is also longer, and the strength of the overall structure is better.

[0012] If the included angle is too large, it is not conducive to the fixation of the internal fixation titanium plate. If it is too small, the range of the internal fixation titanium plate covering the mandibular condyle neck will be reduced. Preferably, the above-mentioned first included angle is 61-67°, the best is 64°, and the second included angle is 56-62°, the best is 59°.

[0013] Preferably, the external connection surface and the internal connection surface of the above-mentioned vertical flat plate portion and the inclined flat plate portion are both arc surfaces. The circular arc transition at the periphery can better protect the skin tissue.

[0014] Preferably, the upper positioning holes, the first lower positioning holes, and the second lower positioning holes are all through holes with a larger upper surface circle diameter than the lower surface circle diameter. In this way, ordinary screws can be used to complete the installation and fixation, which is convenient to use.

[0015] Preferably, the adjacent two upper positioning holes are connected by an inward concave arc surface, the adjacent two first lower positioning holes are connected by an inward concave arc surface, and the adjacent two second lower positioning holes are connected by an inward concave arc surface. The arc transition at the periphery can better protect the skin tissue.

[0016] Compared with the prior art, the advantages of the present utility model are as follows: in addition to the advantages of the background patent itself, it also has the following advantages. Since the lower end of the vertical flat plate portion and the lower end of the inclined flat plate portion are connected by a connecting plate portion, the connecting plate portion, the vertical flat plate portion, and the inclined flat plate portion jointly enclose an annular space, and the overall structure is in a closed-loop shape, with better structural strength, so that the titanium plate can cover as large a range as possible along the length direction of the bone crack; due to the existence of the connecting plate portion, the strength of the lower end of the bone plate is increased, so even if the number of the first lower positioning holes is reduced, the overall fixation stability can be ensured. During the operation, fewer fixing screws can be used, saving the patient's cost and reducing the trauma during the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0018] Figure 2 is Figure 1 a sectional view taken along the line A-A of

[0019] Figure 3 is a usage state diagram of an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described in detail below in conjunction with the embodiments of the drawings.

[0021] As Figures 1 to 3 shown, it is a preferred embodiment of the present utility model.

[0022] A condylar bone plate includes a substrate 1 with a thickness of 1 mm, made of pure titanium material conforming to GB / T 13810-2017, and having good biocompatibility.

[0023] The substrate 1 has a vertical flat plate portion 11 and an inclined flat plate portion 12 that is inclined downward and outward from one side of the middle of the vertical flat plate portion 11. The outer connecting surface 4a and the inner connecting surface 4b of the vertical flat plate portion 11 and the inclined flat plate portion 12 are both arc surfaces. The length of the vertical flat plate portion 11 is 30 mm.

[0024] The upper part of the vertical flat plate portion 11 is provided with a plurality of upper positioning holes 2 that are vertically spaced from each other. The lower part of the vertical flat plate portion 11 is provided with a plurality of first lower positioning holes 3a that are vertically spaced from each other. The upper positioning holes 2, the first lower positioning holes 3a, and the second lower positioning holes 3b are all through holes with a larger diameter of the upper surface circle than that of the lower surface circle, similar to countersunk holes.

[0025] The vertical flat plate portion 11 between adjacent upper positioning holes 2 and first lower positioning holes 3a forms a first connection portion 1a that straddles the bone crack. Among them, the upper positioning hole 2 closest to the first lower positioning hole 3a is arranged at the intersection position of the vertical flat plate portion 11 and the inclined flat plate portion 12. The lower part of the inclined flat plate portion 12 is provided with a plurality of second lower positioning holes 3b that are vertically spaced from each other. The inclined flat plate portion 12 between adjacent upper positioning holes 2 and second lower positioning holes 3b forms a second connection portion 1b that straddles the bone crack.

[0026] The lower end of the vertical flat plate portion 11 and the lower end of the inclined flat plate portion 12 are connected by a connection plate portion 13. The connection plate portion 13, the vertical flat plate portion 11, and the inclined flat plate portion 12 jointly enclose an annular space. The outer side surface 131 of the connection plate portion 13 is a concave arc surface. There are two upper positioning holes 2, two first lower positioning holes 3a, and two second lower positioning holes 3b respectively. The center distance between adjacent two upper positioning holes 2, between adjacent two first lower positioning holes 3a, and between adjacent two second lower positioning holes 3b is 5 millimeters. The connection plate portion 13 is connected between the outer end of the inclined fixing portion 121 and the lower end of the vertical flat plate portion 11.

[0027] The lower part of the inclined flat plate portion 12 has an inclined fixing portion 121 that is further inclined downward and outward. The first included angle α between the inclined fixing portion 121 and the first connection portion 1a is greater than the second included angle β between the second connection portion 1b and the first connection portion 1a. The second lower positioning holes 3b are arranged on the inclined fixing portion 121. The first included angle α is 61 - 67°, preferably 64°. The second included angle β is 56 - 62°, preferably 59°.

[0028] The adjacent two upper positioning holes 2 are connected by a concave arc surface in a transitional manner. The adjacent two first lower positioning holes 3a are connected by a concave arc surface in a transitional manner. The adjacent two second lower positioning holes 3b are connected by a concave arc surface in a transitional manner.

[0029] The substrate 1 that constitutes this fixed titanium plate has a vertical flat plate portion 11 and an inclined flat plate portion 12 that is inclined downward and outward from one side of the middle of the vertical flat plate portion 11. The vertical flat plate portion 11 and the inclined flat plate portion 12 respectively form a first connection portion 1a and a second connection portion 1b that straddle the bone fracture X. The first connection portion 1a and the second connection portion 1b form a certain angle with each other, creating a space between them, and ultimately enabling the titanium plate to cover as large a range as possible along the length direction of the bone fracture X. The vertical flat plate portion 11 and the inclined flat plate portion 12 are fixed to the bone by titanium nails inserted into the positioning holes to ensure reliable fixation.

[0030] Since the lower end of the vertical flat plate portion 11 and the lower end of the inclined flat plate portion 12 are connected by a connection plate portion 13, the connection plate portion 13, the vertical flat plate portion 11, and the inclined flat plate portion 12 together enclose an annular space, and the overall structure of the bone plate is in a closed-loop shape, with better structural strength, enabling the titanium plate to cover as large a range as possible along the length direction of the bone fracture; due to the existence of the connection plate portion 13, the strength of the lower end of the bone plate is increased, so even if the number of the first lower positioning holes 3a is reduced, the overall fixation stability can be ensured. During the operation, fewer fixing screws can be used, saving the patient's cost and reducing the trauma during the operation.

[0031] It should be noted that in the description of this embodiment, the orientation or positional relationship indicated by terms such as "front, back", "left, right", "inside, outside", "up, down", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model. The terms "installation", "connection", and "connection" 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 directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

Claims

1. A condylar bone fracture plate, comprising a base plate (1), the base plate (1) comprising a vertical flat plate portion (11) and an inclined flat plate portion (12) arranged downward and outward from one side of the middle portion of the vertical flat plate portion (11), the upper portion of the vertical flat plate portion (11) being provided with a plurality of upper positioning holes (2) arranged at intervals from one another up and down, the lower portion of the vertical flat plate portion (11) being provided with a plurality of first lower positioning holes (3a) arranged at intervals from one another up and down, the vertical flat plate portion (11) between adjacent upper positioning holes (2) and first lower positioning holes (3a) forming a first connecting portion (1a) spanning a bone crack (X), the lower portion of the inclined flat plate portion (12) being provided with a plurality of second lower positioning holes (3b) arranged at intervals from one another up and down, the inclined flat plate portion (12) between adjacent upper positioning holes (2) and second lower positioning holes (3b) forming a second connecting portion (1b) spanning a bone crack (X); characterized in that: The lower end of the vertical flat plate portion (11) and the lower end of the inclined flat plate portion (12) are connected via a connecting plate portion (13), and the connecting plate portion (13), the vertical flat plate portion (11) and the inclined flat plate portion (12) together enclose an annular space.

2. The condylar bone plate according to claim 1, characterized in that: The outer side surface (131) of the connecting plate portion (13) is an inwardly concave arc surface.

3. The condylar bone plate according to claim 1, characterized in that: There are two upper positioning holes (2), two first lower positioning holes (3a) and two second lower positioning holes (3b).

4. The condylar bone fracture plate according to claim 1, characterized in that: The vertical flat plate portion (11), the inclined flat plate portion (12) and the connecting plate portion (13) are an integrated plate component.

5. The condylar bone plate according to claim 1, characterized in that: The upper positioning hole (2) most adjacent to the first lower positioning hole (3a) is arranged at the staggered position of the vertical flat plate portion (11) and the inclined flat plate portion (12).

6. The condylar bone plate according to claim 1, characterized in that: The lower part of the inclined flat plate part (12) has an inclined fixing part (121) which is further inclined downward and outward, the first angle (α) between the inclined fixing part (121) and the first connecting part (1a) is greater than the second angle (β) between the second connecting part (1b) and the first connecting part (1a), the second lower positioning hole (3b) is arranged on the inclined fixing part (121), and the connecting plate part (13) is connected between the outer end of the inclined fixing part (121) and the lower end of the vertical flat plate part (11).

7. The condylar bone plate according to claim 6, characterized in that: The first angle (α) is 61 to 67°, and the second angle (β) is 56 to 62°.

8. The condylar bone plate according to claim 1, characterized in that: The outer connecting surface (4a) and the inner connecting surface (4b) of the vertical flat plate portion (11) and the inclined flat plate portion (12) are both arc surfaces.

9. The condylar bone plate according to claim 1, characterized in that: The upper positioning hole (2), the first lower positioning hole (3a) and the second lower positioning hole (3b) are all through holes with an upper surface circular diameter greater than a lower surface circular diameter.

10. The condylar bone fracture plate according to claim 1, characterized in that: Two adjacent upper positioning holes (2) are connected by a concave arc transition, two adjacent first lower positioning holes (3a) are connected by a concave arc transition, and two adjacent second lower positioning holes (3b) are connected by a concave arc transition.

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