Bone plate

Abstract

This application discloses a bone plate, including an inner surface facing the bone, an outer surface opposite to the inner surface, and an inner surface extending between the inner and outer surfaces. The inner surface forms a locking hole, which includes a locking segment. The locking segment includes a first sub-hole segment and a second sub-hole segment sequentially distributed along the direction from the outer surface to the inner surface. The first and second sub-hole segments are conical holes with gradually increasing diameters along the direction from the inner surface to the outer surface. The inner surface includes a first surface forming the first sub-hole segment and a second surface forming the second sub-hole segment. The first surface includes a plurality of sub-surfaces sequentially distributed along the circumference of the first sub-hole segment and spaced apart by grooves. The second surface has a first internal thread continuously distributed along the circumference of the second sub-hole segment. By providing a continuously distributed first internal thread on the first surface, this application increases the locking force of the first internal thread on the screw, preventing the screw from loosening and coming out of the bone plate.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a bone plate. Background Technology

[0002] With the development of medical technology, the use of bone plates in orthopedic treatment is becoming increasingly common. Bone plates typically have locking holes; screws are threaded through these holes and connected to the bone, thus fixing the bone plate to the bone.

[0003] Universal locking holes are commonly used in existing bone plates. When a screw is inserted into the locking hole, the tilt angle of the screw can be adjusted. As a result, the locking force between the locking hole and the screw on the bone plate is poor, which poses a risk that the screw may loosen and come out of the bone plate after surgery. Summary of the Invention

[0004] This application provides a bone plate designed to address the problem that existing bone plates have poor locking force between the locking holes and screws, leading to the screws loosening and coming out of the bone plate after surgery.

[0005] This application provides a bone plate, which includes an inner surface, an outer surface, and an inner surface. The inner surface faces the bone, the outer surface is disposed opposite to the inner surface, and the inner surface extends between the inner surface and the outer surface. The inner surface forms a locking hole, which includes a locking hole segment.

[0006] The locking hole segment includes a first sub-hole segment and a second sub-hole segment sequentially distributed along the direction from the outer surface toward the inner surface. The first sub-hole segment and the second sub-hole segment are conical holes, and their diameters gradually increase along the direction from the inner surface toward the outer surface. The inner surface includes a first surface and a second surface. The first surface forms the first sub-hole segment, and the second surface forms the second sub-hole segment. The first surface includes a plurality of sub-surfaces sequentially distributed along the circumference of the first sub-hole segment, and adjacent sub-surfaces are separated by grooves. The second surface is provided with a first internal thread continuously distributed along the circumference of the second sub-hole segment.

[0007] In some embodiments, the distance between the end of the first sub-hole segment near the inner surface and the inner surface is L, and the distance between the inner surface and the outer surface is H, wherein 1 / 8 ≤ L / H ≤ 1 / 2.

[0008] In some embodiments, the length of the second sub-hole segment along the outer surface toward the inner surface is greater than or equal to 0.3 mm; the length of the second sub-hole segment along the outer surface toward the inner surface is less than or equal to 1 mm; or,

[0009] The first internal thread has a thread count greater than or equal to 1 turn and less than or equal to 4 turns.

[0010] In some embodiments, the locking hole segment further includes a third sub-hole segment, which is connected to the end of the second sub-hole segment away from the first sub-hole segment, and the third sub-hole segment is a cylindrical hole; the internal surface further includes a third surface, which forms the third sub-hole segment, and the third surface is provided with a second internal thread continuously distributed in the circumferential direction of the third sub-hole segment.

[0011] In some embodiments, the length of the third sub-hole segment along the outer surface toward the inner surface is greater than or equal to 0.1 mm; the length of the third sub-hole segment along the outer surface toward the inner surface is less than or equal to 0.5 mm; or,

[0012] The second internal thread has a number of turns greater than or equal to 1 / 3 turns and less than or equal to 3 turns.

[0013] In some embodiments, the number of grooves is multiple;

[0014] The first surface is provided with threads; or,

[0015] The first surface is a smooth surface.

[0016] In some embodiments, the radial cross-sectional area of ​​the groove gradually increases along the direction from the inner surface toward the outer surface.

[0017] In some embodiments, the locking hole further includes a first hole segment formed by the inner surface, the first hole segment extending between the outer surface and the locking hole segment and communicating with the locking hole segment, wherein the minimum diameter of the first hole segment is greater than or equal to the maximum diameter of the locking hole segment;

[0018] The first hole segment is a conical hole, and the diameter of the first hole segment gradually increases in the direction away from the locking hole segment; or, the first hole segment is a cylindrical hole.

[0019] In some embodiments, the locking hole further includes a second hole segment formed by the inner surface, the second hole segment extending between the inner surface and the locking hole segment and communicating with the locking hole segment, the second hole segment being a conical hole, the diameter of the second hole segment gradually increasing in a direction away from the locking hole segment.

[0020] In some embodiments, the inner surface is further formed with a through hole extending between the inner surface and the outer surface. The minimum diameter of the through hole is D1, the minimum diameter of the locking hole is D2, and the distance between the axis of the through hole and the axis of the locking hole is P, where P < (D1 + D2) / 2.

[0021] The bone plate provided in this embodiment of the application has its first and second sub-hole segments of the locking hole section having gradually increased diameters along the direction from the inner surface to the outer surface. This allows the screw to be inserted into the locking hole segment and tilted at a certain angle relative to the axial direction of the locking hole. This allows the screw to flexibly adjust its tilt angle relative to the bone plate according to the shape of the bone, thereby better fixing the bone plate to the bone. Furthermore, by providing a first internal thread continuously distributed circumferentially on the first surface corresponding to the second sub-hole segment of the locking hole section, compared to bone plates in the prior art where the groove extends directly from the inner surface to the outer surface, the bone plate in this embodiment of the application allows for a larger meshing area between the first internal thread in the second sub-hole segment and the external thread on the screw. This increases the locking force of the first internal thread on the screw, preventing the screw from loosening and dislodging from the bone plate after surgery. Attached Figure Description

[0022] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0023] Figure 1 This is a schematic diagram of the structure of the first embodiment of the bone plate provided in this application.

[0024] Figure 2 for Figure 1 A sectional view of the middle bone plate, which is sectional along the length of the bone plate;

[0025] Figure 3 for Figure 1 A partial sectional view of the middle bone plate, which is sectionally viewed along the axial direction of the locking hole;

[0026] Figure 4 for Figure 3 A simplified partial sectional view of the middle bone plate, in which the threaded portion of the locking hole section has been simplified;

[0027] Figure 5 A partial sectional view of a second embodiment of the bone plate provided in this application, which is sectionally viewed along the axial direction of the locking hole;

[0028] Figure 6 This is a partial sectional view of a third embodiment of the bone plate provided in this application, which is sectionally viewed along the axial direction of the locking hole;

[0029] Figure 7 This is a partial sectional view of a fourth embodiment of the bone plate provided in this application, which is sectional along the axial direction of the locking hole;

[0030] Figure 8 for Figure 7 A simplified partial sectional view of the middle bone plate, in which the threaded portion of the locking hole section has been simplified;

[0031] Figure 9 A partial structural schematic diagram of the fifth embodiment of the bone plate provided in this application;

[0032] Figure 10 for Figure 9 A partial structural cross-sectional view of the middle bone plate, which is viewed along the axial direction of the locking hole.

[0033] Bone plate 100 Bone plate 100a Bone plate 100b Bone plate 100c Bone plate 100d inner surface 110 inner surface 110a inner surface 110c inner surface 110d outer surface 120 outer surface 120c outer surface 120d internal surface 130 internal surface 130c internal surface 130d First surface 131 First surface 131a First surface 131b Sub-surface 1311 Sub-surface 1311a Sub-surface 1311b Second surface 132 Third Surface 133 First hole surface 134 First hole surface 134a Pressurized surface 135 Locking hole 140 Locking hole 140a Locking hole 140b Locking hole 140c Locking hole 140d Locking hole section 141 Locking hole section 141a Locking hole section 141b Locking hole section 141c First sub-hole segment 1411 First sub-hole segment 1411a First sub-hole segment 1411b First sub-hole segment 1411c Second sub-hole segment 1412 Second sub-hole segment 1412a Second sub-hole segment 1412b Second sub-hole segment 1412c Third son Kongduan 1413 First section 142 First section 142a First section 142c Second section 143 Second section 143a Second section 143b Second section 143c Second hole surface 144 groove 150 Through hole 160 Pressure-increasing orifice section 161 Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0035] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0037] In this application, unless otherwise expressly specified, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0039] This application provides a bone plate. Detailed descriptions follow.

[0040] Figure 1 This is a schematic diagram of one embodiment of the bone plate provided in this application. Figure 3 for Figure 1 A partial sectional view of the middle bone plate, which is sectionally viewed along the axial direction of the locking hole. (See attached image.) Figure 1 and Figure 3 As shown, the bone plate 100 includes an inner surface 110, an outer surface 120 and an inner surface 130. The inner surface 110 faces the bone, the outer surface 120 is disposed opposite to the inner surface 110, and the inner surface 130 extends between the inner surface 110 and the outer surface 120.

[0041] A locking hole 140 is formed on the inner surface 130 of the bone plate 100. The locking hole 140 extends between and through the inner surface 110 and the outer surface 120 of the bone plate 100, and the locking hole 140 has openings on the inner surface 110 and the outer surface 120 of the bone plate 100. The bone plate 100 is fixed to the bone by abutting the inner surface 110 of the bone plate 100 against the surface of the bone, and then threading a screw (not shown) through the opening of the locking hole 140 on the outer surface 120 and into the bone.

[0042] In some embodiments, such as Figure 3 and Figure 4 As shown, the locking hole 140 includes a locking hole section 141. The locking hole section 141 includes a first sub-hole section 1411 and a second sub-hole section 1412 sequentially distributed along the direction from the outer surface 120 toward the inner surface 110. The first sub-hole section 1411 and the second sub-hole section 1412 are conical holes, and the diameter of the first sub-hole section 1411 and the second sub-hole section 1412 gradually increases along the direction from the inner surface 110 toward the outer surface 120. Thus, the locking hole 140 is a universal locking hole. When the screw passes through the locking hole 140 and connects to the bone, the screw can tilt at a certain angle relative to the axial direction of the locking hole 140 within the locking hole 140, so that the screw can flexibly adjust the tilt angle of the screw relative to the bone plate 100 according to the shape of the bone, thereby allowing the screw to better fix the bone plate 100 to the bone.

[0043] It should be noted that the radial cross-sectional shape of the first sub-hole segment 1411 and the second sub-hole segment 1412 of the locking hole segment 141 can also be an elliptical cross-section or other non-circular cross-section. In this case, the hole diameter of the first sub-hole segment 1411 and the second sub-hole segment 1412 is the diameter of the inscribed circle or the circumscribed circle of the radial cross-section of the first sub-hole segment 1411 and the second sub-hole segment 1412.

[0044] In some embodiments, the bone plate 100 has multiple locking holes 140, which are sequentially distributed along the length of the bone plate 100 to facilitate screws being threaded into appropriate positions on the bone through different locking holes 140 according to the shape of the bone. It should be noted that the shape of the bone plate 100 is not limited to a strip-shaped plate; it can also be a rectangular plate, an arc-shaped plate, or other shapes. The multiple locking holes 140 on the bone plate 100 can also be distributed in a matrix or randomly on the bone plate 100.

[0045] like Figure 3 and Figure 4As shown, the inner surface 130 of the bone plate 100 includes a first surface 131 and a second surface 132. The first surface 131 forms a first sub-hole segment 1411, and the second surface 132 forms a second sub-hole segment 1412. The first surface 131 includes a plurality of sub-surfaces 1311 sequentially distributed along the circumference of the first sub-hole segment 1411, and adjacent sub-surfaces 1311 are spaced apart by a groove 150. The groove 150 is used to mate with a guide (not shown) to position the guide.

[0046] like Figure 1 and Figure 2 As shown, there are multiple grooves 150. The multiple grooves 150 are distributed sequentially along the circumference of the locking hole 140. Correspondingly, the guide includes multiple guide posts, the number of which is equal to the number of grooves 150 and they are matched one-to-one. The guide is positioned by inserting the multiple guide posts of the guide into the corresponding grooves 150.

[0047] In some embodiments, such as Figure 3 and Figure 4 As shown, the second surface 132 of the inner surface 130 is provided with a first internal thread continuously distributed in the circumferential direction of the second sub-hole section 1412. It can be understood that by providing the first internal thread continuously distributed in the circumferential direction of the second sub-hole section 1412 on the second surface 132 corresponding to the second sub-hole section 1412 of the locking hole section 141, compared with the bone plate in the prior art where the groove extends directly from the inner surface to the outer surface, the bone plate 100 in this embodiment can make the meshing area between the first internal thread in the second sub-hole section 1412 and the external thread on the screw larger, thereby increasing the locking force of the first internal thread on the screw and avoiding the problem of the screw loosening and coming out of the bone plate 100 after surgery.

[0048] It should be noted that the first internal thread of the second surface 132 is continuously distributed in the circumferential direction of the second sub-hole section 1412, which means that the thread teeth of the first internal thread extend continuously spirally in the circumferential direction of the first sub-hole section 1411 and are not divided into multiple segments.

[0049] In some embodiments, such as Figure 3As shown, the distance between the end of the first sub-hole segment 1411 near the inner surface 110 and the inner surface 110 is L, and the distance between the inner surface 110 and the outer surface 120 of the bone plate 100 is H, where 1 / 8 ≤ L / H ≤ 1 / 2. In this embodiment, by ensuring that the ratio of the distance L between the end of the first sub-hole segment 1411 near the inner surface 110 and the inner surface 110 to the distance H between the inner surface 110 and the outer surface 120 of the bone plate 100 is less than or equal to 1 / 2, it is possible to ensure that the groove 150 has sufficient length along the direction from the outer surface 120 towards the inner surface 110, thereby ensuring a stable fit between the groove 150 and the guide and improving the limiting effect of the groove 150 on the guide.

[0050] In addition, by making the ratio of the distance L between the end of the first sub-hole segment 1411 near the inner surface 110 and the inner surface 110 to the distance H between the inner surface 110 and the outer surface 120 of the bone plate 100 greater than or equal to 1 / 8, it can be ensured that the second sub-hole segment 1412 formed on the second surface 132 has sufficient length in the direction from the outer surface 120 toward the inner surface 110, so as to ensure the locking effect of the first internal thread of the second surface 132 on the screw.

[0051] In some embodiments, such as Figure 3 and Figure 4 As shown, the second sub-hole segment 1412 is oriented along the outer surface 120 toward the inner surface 110 (and...). Figure 3 and Figure 4 The length of the first internal thread on the second surface 132 forming the second sub-hole segment 1412 is greater than or equal to 0.3 mm, so that the first internal thread has a sufficient length of thread teeth to engage with the thread on the screw, ensuring that the first internal thread has a good locking effect on the screw.

[0052] Alternatively, the number of turns of the first internal thread can be greater than or equal to 1 turn to ensure that the first internal thread has a better locking effect on the screw.

[0053] It should be noted that the thread teeth formed by the complete spiral extension of the first internal thread along the circumference of the second sub-hole section 1412 for one turn is called one turn of thread teeth.

[0054] In some embodiments, the length of the second sub-hole segment 1412 along the direction from the outer surface 120 toward the inner surface 110 is less than or equal to 1 mm, thereby avoiding an excessive number of threads in the first internal thread of the second surface 132, which would result in a greater force required to screw the screw into the second sub-hole segment 1412, making it easier to screw the screw into the second sub-hole segment 1412 of the locking hole 140.

[0055] Alternatively, the number of turns of the first internal thread can be less than or equal to 4 turns to make it easier to screw the screw into the second sub-hole section 1412 of the locking hole 140.

[0056] In some embodiments, the radial cross-sectional area of ​​the groove 150 gradually increases along the direction from the inner surface 110 toward the outer surface 120, so that the guide post of the guide can be inserted into the groove 150 from the opening of the groove 150 on the outer surface 120. Wherein, as Figure 4 As shown, the angle α formed by the side surface and bottom surface of the groove 150 is less than or equal to 30°, so that after the guide post of the guide is inserted into the groove 150, the inner surface 110 of the groove 150 and the guide post fit better, thereby positioning the guide more stably.

[0057] like Figure 3 and Figure 4 As shown, the locking hole 140 also includes a first hole segment 142 formed by the inner surface 130. The first hole segment 142 extends between the outer surface 120 and the locking hole segment 141 and communicates with the locking hole segment 141. The minimum diameter of the first hole segment 142 is greater than or equal to the maximum diameter of the locking hole segment 141. When the screw passes through the locking hole 140 and is threaded into the bone, the first hole segment 142 can accommodate the head of the screw, and the head of the screw can apply pressure to the inner surface of the first hole segment 142, so that the inner surface 110 of the bone plate 100 more stably abuts against the bone surface.

[0058] In some embodiments, the first hole segment 142 is a conical hole, and the diameter of the first hole segment 142 gradually increases in the direction away from the locking hole segment 141. The screw head applies pressure to the first hole surface 134 forming the first hole segment 142 on the inner surface 130, making the inner surface 110 of the bone plate 100 more stably abut against the bone surface. Furthermore, even when the screw is tilted within the locking hole 140, the screw head can still stably abut against and apply pressure to the first hole surface 134.

[0059] It should be noted that the radial cross-sectional shape of the first hole segment 142 can be elliptical or other non-circular. In this case, the diameter of the first hole segment 142 is the diameter of the inscribed circle or circumscribed circle of the radial cross-section of the first hole segment 142.

[0060] Alternatively, the locking hole 140 in this embodiment may not include the first hole segment 142. In this case, the head of the screw can abut against the outer surface 120 of the bone plate 100 and apply pressure to the outer surface 120, so that the inner surface 110 of the bone plate 100 can abut against the bone surface more stably.

[0061] In some embodiments, such as Figure 3 and Figure 4As shown, the locking hole 140 also includes a second hole segment 143 formed by the inner surface 130. The second hole segment 143 extends between the inner surface 110 and the locking hole segment 141 and communicates with the locking hole segment 141. The second hole segment 143 is a conical hole, and the diameter of the second hole segment 143 gradually increases in the direction away from the locking hole segment 141. Thus, when the screw is tilted at a certain angle in the locking hole 140, the second hole surface 144 of the inner surface 130 forming the second hole segment 143 can avoid the screw without interfering with it, so as to facilitate the adjustment of the tilt angle of the screw in the locking hole 140.

[0062] It should be noted that the radial cross-sectional shape of the second hole segment 143 can be elliptical or other non-circular, etc. In this case, the diameter of the second hole segment 143 is the diameter of the inscribed circle or circumscribed circle of the radial cross-section of the second hole segment 143.

[0063] Alternatively, in this embodiment, the locking hole 140 may not include the second hole segment 143. In this case, the locking hole segment 141 of the locking hole 140 can extend directly to the inner surface 110, which also makes it convenient to adjust the tilt angle of the screw in the locking hole 140.

[0064] Figure 5 This is a partial sectional view of a second embodiment of the bone plate provided in this application, taken along the axial direction of the locking hole. In other embodiments, such as Figure 5 As shown, the locking hole 140a of the bone plate 100a includes a first hole segment 142a, a locking hole segment 141a, and a second hole segment 143a. The locking hole segment 141a includes a first sub-hole segment 1411a and a second sub-hole segment 1412a. The structures of the first hole segment 142a, the second hole segment 143a, the first sub-hole segment 1411a, and the second sub-hole segment 1412a can refer to the structures of the first hole segment 142, the second hole segment 143, the first sub-hole segment 1411, and the second sub-hole segment 1412 described above, and will not be repeated here. The difference is that the first hole segment 142a of the locking hole 140a in this embodiment is a cylindrical hole. There is a stepped surface between the sub-surface 1311a of the first surface 131a and the first hole surface 134a forming the first hole segment 142a. The screw head applies pressure to the stepped surface, making the inner surface 110a of the bone plate 100a more stably abut against the bone surface.

[0065] In some embodiments, such as Figure 3 and Figure 4 As shown, a threaded area is formed on the first surface 131 of the inner surface 130. When the screw passes through the locking hole 140 of the bone plate 100 and is threadedly connected to the bone, the threaded area of ​​the first surface 131 can engage with the thread on the outer peripheral surface of the screw, thereby further improving the locking effect of the screw.

[0066] Specifically, the first surface 131 is provided with threads. The threads of the first surface 131 extend circumferentially spirally along the first sub-hole segment 1411 to form multiple turns of threads, each turn of threads being spaced by multiple grooves 150 to form multiple segments of sub-threads located on different sub-surfaces 1311. Each sub-surface 1311 has multiple segments of threads, which are sequentially distributed along the outer surface 120 toward the inner surface 110 to form a thread row.

[0067] Figure 6 This is a partial sectional view of a third embodiment of the bone plate provided in this application, which is sectionally viewed along the axial direction of the locking hole. In other embodiments, such as Figure 6 As shown, the locking hole 140b of the bone plate 100b includes a second hole segment 143b and a locking hole segment 141b. The locking hole segment 141b includes a first sub-hole segment 1411b and a second sub-hole segment 1412b. The structures of the second hole segment 143b and the second sub-hole segment 1412b can refer to the structures of the second hole segment 143b and the second sub-hole segment 1412b described above, and will not be repeated here. The difference is that the first surface 131b of the bone plate 100b used to form the first sub-hole segment 1411b is a smooth surface. Specifically, each sub-surface 1311b of the first surface 131b is a smooth surface. Among them, the sub-surface 1311b can be a smooth curved surface without threads, a smooth arc surface, etc. In this case, when the screw passes through the locking hole 140b and connects with the bone thread, the external thread on the outer circumference of the screw can tap the internal thread on the first surface 131b.

[0068] It should be noted that the bone plate 100b in the embodiments of this application may also include a first hole segment 142. The structure of the first hole segment 142 can be referred to other embodiments in this application, and will not be repeated here.

[0069] Figure 7 This is a partial sectional view of a fourth embodiment of the bone plate provided in this application, which is sectionally viewed along the axial direction of the locking hole. Figure 8 for Figure 7 A simplified partial sectional view of the middle bone plate, wherein the threaded portion of the locking hole section is simplified. In other embodiments, such as Figure 7 and Figure 8 As shown, the locking hole 140c of the bone plate 100c includes a first hole segment 142c, a second hole segment 143c, and a locking hole segment 141c. The locking hole segment 141c includes a first sub-hole segment 1411c and a second sub-hole segment 1412c. The structure of the first hole segment 142c, the second hole segment 143c, the first sub-hole segment 1411c, and the second sub-hole segment 1412c can refer to the structure of the first hole segment 142, the second hole segment 143, the first sub-hole segment 1411, and the second sub-hole segment 1412 described above, and will not be repeated here.

[0070] The difference lies in that the locking hole section 141c of the bone plate 100c also includes a third sub-hole section 1413, which is connected to the end of the second sub-hole section 1412c away from the first sub-hole section 1411c. The third sub-hole section 1413 is a cylindrical hole. The internal surface 130c of the bone plate 100c includes a third surface 133, which forms the third sub-hole section 1413. A second internal thread is provided on the third surface 133, which is continuously distributed in the circumferential direction of the third sub-hole section 1413.

[0071] In this embodiment, a cylindrical third sub-hole section 1413 is connected to the end of the second sub-hole section 1412c away from the first sub-hole section 1411c, and a second internal thread is provided in the third sub-hole section 1413. When the screw passes through the third sub-hole section 1413, the second internal thread in the third sub-hole section 1413 can engage more tightly with the external thread of the screw, thereby further improving the locking effect of the screw.

[0072] In some embodiments, the length of the third sub-hole segment 1413 along the direction from the outer surface 120c toward the inner surface 110c is greater than or equal to 0.1 mm, so that the second internal thread of the third surface 133 forming the third sub-hole segment 1413 has a sufficient length of thread teeth and thread core on the screw, ensuring that the second internal thread has a good locking effect on the screw.

[0073] Alternatively, the number of turns of the second internal thread on the third surface 133 can be greater than or equal to 1 / 3 turns to ensure that the second internal thread has a better locking effect on the screw.

[0074] It should be noted that one turn of thread is the thread formed by the complete spiral extension of the second internal thread along the circumference of the third sub-hole section 1413. One-third turn of thread refers to the thread formed by the spiral extension of the second internal thread along the circumference of the third sub-hole section 1413 for one-third of a turn.

[0075] In some embodiments, the length of the third sub-hole segment 1413 along the direction from the outer surface 120c toward the inner surface 110c is less than or equal to 0.5 mm, in order to avoid the problem that the length of the third sub-hole segment 1413 is too long, which would prevent the screw from tilting within the third sub-hole segment 1413 after passing through it, and to allow the screw to flexibly adjust the tilt angle according to the shape of the bone within the third sub-hole segment 1413.

[0076] Alternatively, the number of turns of the second internal thread can be less than or equal to 3 turns, allowing the screw to flexibly adjust its tilt angle within the third sub-hole segment 1413 according to the shape of the bone.

[0077] Figure 9This is a partial structural diagram of the fifth embodiment of the bone plate provided in this application. Figure 10 for Figure 9 A partial sectional view of the middle bone plate, showing the section along the axial direction of the locking hole. (See attached image.) Figure 9 and Figure 10 As shown, the bone plate 100d includes an inner surface 110d, an outer surface 120d and an inner surface 130d. The inner surface 110d has a locking hole 140d. The structure of the locking hole 140d can refer to the locking hole 140 structure in the above embodiment, and will not be described again here.

[0078] The difference lies in that, in the embodiment of this application, the inner surface 130d of the bone plate 100d is also formed with a through hole 160, which extends between the inner surface 110d and the outer surface 120d. The minimum diameter of the through hole 160 is D1, the minimum diameter of the locking hole 140d is D2, and the distance between the axis of the through hole 160 and the axis of the locking hole 140d is P, where P < (D1 + D2) / 2.

[0079] In this embodiment, by making half of the sum of the minimum diameter D1 of the through hole 160 and the minimum diameter D2 of the locking hole 140d greater than the distance P between the axis of the through hole 160 and the axis of the locking hole 140d, the through hole 160 and the locking hole 140d can be interconnected to form a connecting hole, thereby reducing the space occupied by the through hole 160 and the locking hole 140d when they are spaced apart, so as to reduce the impact of simultaneously opening the through hole 160 and the locking hole 140d on the bone plate 100d on the structural strength of the bone plate 100d.

[0080] In some embodiments, the through-hole 160 is a pressure hole extending from the inner surface 110d to the outer surface 120d to penetrate the bone plate 100d. By threading a pressure screw through the pressure hole and connecting it to the bone, the pressure screw can abut against the pressure surface 135 of the inner surface 130d forming the pressure hole, thereby applying a radial force along the through-hole 160 to the bone plate 100d. This can temporarily position the bone plate 100d so that other screws can be connected to the bone plate 100d through the locking hole 140d. Subsequently, the pressure screw can be removed from the pressure hole.

[0081] Specifically, the through hole 160 includes a pressure hole section 161, the diameter of which gradually decreases along the outer surface 120d toward the inner surface 110d, so as to facilitate the contact between the pressure screw and the pressure surface 135 forming the pressure hole on the inner surface 130d. The number of mating holes formed by the through hole 160 and the locking hole 140d on the bone plate 100d is multiple, and these multiple mating holes are distributed sequentially along the length of the bone plate 100d.

[0082] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0083] The above provides a detailed description of a bone plate provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A bone plate, characterized in that, The bone plate includes an inner surface, an outer surface, and an inner surface. The inner surface faces the bone, the outer surface is disposed opposite to the inner surface, and the inner surface extends between the inner surface and the outer surface. The inner surface forms a locking hole, and the locking hole includes a locking hole segment. The locking hole segment includes a first sub-hole segment and a second sub-hole segment sequentially distributed along the direction from the outer surface toward the inner surface. The first and second sub-hole segments are conical holes, and their diameters gradually increase along the direction from the inner surface toward the outer surface. The inner surface includes a first surface and a second surface. The first surface forms the first sub-hole segment, and the second surface forms the second sub-hole segment. The first surface includes a plurality of sub-surfaces sequentially distributed along the circumference of the first sub-hole segment, with adjacent sub-surfaces connected by grooves. The second surface is provided with a first internal thread continuously distributed in the circumferential direction of the second sub-hole segment; the number of turns of the first internal thread is greater than or equal to 1 turn; the locking hole segment further includes a third sub-hole segment, which is connected to the end of the second sub-hole segment away from the first sub-hole segment, and the third sub-hole segment is a cylindrical hole; the groove is used to cooperate with the guide to position the guide; the inner surface further includes a third surface, which forms the third sub-hole segment, and the third surface is provided with a second internal thread continuously distributed in the circumferential direction of the third sub-hole segment.

2. The bone plate as described in claim 1, characterized in that, The distance between the end of the first sub-hole segment closest to the inner surface and the inner surface is L, and the distance between the inner surface and the outer surface is H, wherein 1 / 8≤L / H≤1 / 2.

3. The bone plate as described in claim 1, characterized in that, The number of turns of the first internal thread is less than or equal to 4.

4. The bone plate as described in claim 1, characterized in that, The length of the third sub-hole segment along the outer surface toward the inner surface is greater than or equal to 0.1 mm; the length of the third sub-hole segment along the outer surface toward the inner surface is less than or equal to 0.5 mm; or, The second internal thread has a number of turns greater than or equal to 1 / 3 turns and less than or equal to 3 turns.

5. The bone plate according to any one of claims 1 to 4, characterized in that, The number of grooves is multiple; The first surface is provided with threads; or, The first surface is a smooth surface.

6. The bone plate according to any one of claims 1 to 4, characterized in that, The radial cross-sectional area of ​​the groove gradually increases along the direction from the inner surface toward the outer surface.

7. The bone plate according to any one of claims 1 to 4, characterized in that, The locking hole further includes a first hole segment formed by the inner surface, the first hole segment extending between the outer surface and the locking hole segment and communicating with the locking hole segment, wherein the minimum diameter of the first hole segment is greater than or equal to the maximum diameter of the locking hole segment; The first hole segment is a conical hole, and the diameter of the first hole segment gradually increases in the direction away from the locking hole segment; or, the first hole segment is a cylindrical hole.

8. The bone plate according to any one of claims 1 to 4, characterized in that, The locking hole further includes a second hole segment formed by the inner surface, the second hole segment extending between the inner surface and the locking hole segment and communicating with the locking hole segment, the second hole segment being a conical hole, the diameter of the second hole segment gradually increasing in the direction away from the locking hole segment.

9. The bone plate according to any one of claims 1 to 4, characterized in that, The inner surface is also formed with a through hole that extends between the inner surface and the outer surface. The minimum diameter of the through hole is D1, the minimum diameter of the locking hole is D2, and the distance between the axis of the through hole and the axis of the locking hole is P, where P < (D1 + D2) / 2.

10. A bone plate, characterized in that, The bone plate includes an inner surface, an outer surface, and an inner surface. The inner surface faces the bone, the outer surface is disposed opposite to the inner surface, and the inner surface extends between the inner surface and the outer surface. The inner surface forms a locking hole, and the locking hole includes a locking hole segment. The locking hole segment includes a first sub-hole segment and a second sub-hole segment sequentially distributed along the direction from the outer surface toward the inner surface. The first and second sub-hole segments are conical holes, and their diameters gradually increase along the direction from the inner surface toward the outer surface. The inner surface includes a first surface and a second surface. The first surface forms the first sub-hole segment, and the second surface forms the second sub-hole segment. The first surface includes a plurality of sub-surfaces sequentially distributed along the circumference of the first sub-hole segment, with adjacent sub-surfaces separated by grooves. The surface is provided with a first internal thread continuously distributed in the circumferential direction of the second sub-hole segment; the length of the second sub-hole segment along the outer surface toward the inner surface is greater than or equal to 0.3 mm; the locking hole segment also includes a third sub-hole segment, the third sub-hole segment being connected to the end of the second sub-hole segment away from the first sub-hole segment, the third sub-hole segment being a cylindrical hole; the groove is used to cooperate with the guide to position the guide; the inner surface also includes a third surface, the third surface forming the third sub-hole segment, the third surface being provided with a second internal thread continuously distributed in the circumferential direction of the third sub-hole segment.

11. The bone plate as described in claim 10, characterized in that, The distance between the end of the first sub-hole segment closest to the inner surface and the inner surface is L, and the distance between the inner surface and the outer surface is H, wherein 1 / 8≤L / H≤1 / 2.

12. The bone plate as described in claim 10, characterized in that, The length of the second sub-hole segment along the direction from the outer surface toward the inner surface is less than or equal to 1 mm.

13. The bone plate as described in claim 10, characterized in that, The length of the third sub-hole segment along the outer surface toward the inner surface is greater than or equal to 0.1 mm; the length of the third sub-hole segment along the outer surface toward the inner surface is less than or equal to 0.5 mm; or, The second internal thread has a number of turns greater than or equal to 1 / 3 turns and less than or equal to 3 turns.

14. The bone plate according to any one of claims 10 to 13, characterized in that, The number of grooves is multiple; The first surface is provided with threads; or, The first surface is a smooth surface.

15. The bone plate according to any one of claims 10 to 13, characterized in that, The radial cross-sectional area of ​​the groove gradually increases along the direction from the inner surface toward the outer surface.

16. The bone plate according to any one of claims 10 to 13, characterized in that, The locking hole further includes a first hole segment formed by the inner surface, the first hole segment extending between the outer surface and the locking hole segment and communicating with the locking hole segment, wherein the minimum diameter of the first hole segment is greater than or equal to the maximum diameter of the locking hole segment; The first hole segment is a conical hole, and the diameter of the first hole segment gradually increases in the direction away from the locking hole segment; or, the first hole segment is a cylindrical hole.

17. The bone plate according to any one of claims 10 to 13, characterized in that, The locking hole further includes a second hole segment formed by the inner surface, the second hole segment extending between the inner surface and the locking hole segment and communicating with the locking hole segment, the second hole segment being a conical hole, the diameter of the second hole segment gradually increasing in the direction away from the locking hole segment.

18. The bone plate according to any one of claims 10 to 13, characterized in that, The inner surface is also formed with a through hole that extends between the inner surface and the outer surface. The minimum diameter of the through hole is D1, the minimum diameter of the locking hole is D2, and the distance between the axis of the through hole and the axis of the locking hole is P, where P < (D1 + D2) / 2.

Images