Bone plate and bone plate system

Abstract

The invention relates to a bone plate and a bone plate system, a through hole is formed in the bone plate, a plurality of clamping units extend from the hole wall surface of the hole to the center of the hole, and the multiple clamping units are arranged at intervals in the circumferential direction of the hole; one side, far away from the hole wall, of each clamping unit is provided with an end part, and each end part is provided with at least two clamping parts which are arranged at intervals; wherein the clamping part of at least one clamping unit is used for being clamped with the thread groove of the fixing piece. When the bone lamella and the bone lamella system are used for fixing and repairing a fractured bone structure, the bone lamella is firstly abutted against the bone structure, and then the fixing piece is screwed, so that the locking rod part of the fixing piece penetrates through the hole and is fixedly connected with the bone structure. Meanwhile, in the screwing process, the at least two clamping parts on each clamping unit can be clamped in the threaded grooves of the fixing pieces, the clamping units and the threaded grooves of the fixing pieces are locked stably, the situation of locking failure is not prone to occurring, the rehabilitation treatment effect of the bone structure after fracture is good, and the period is short.

Description

Technical Field

[0001] The present application relates to the field of medical device technology, and in particular to bone plates and bone plate systems. Background Art

[0002] The bone plate system is a common device for treating fractures in clinical practice. The bone plate is fixed to the patient's bone through screws, thereby fixing and repairing the fractured bone. In order to match different bone contours, bone plates with screws that can deflect relative to the bone plate have appeared in the relevant technology. However, the screws in this type of bone plate are prone to locking failure with the holes on the bone plate, resulting in poor rehabilitation treatment effects for fractures and a long period of time. Summary of the invention

[0003] Based on this, it is necessary to provide a bone plate to address the problem that the screws in the bone plate in the prior art are prone to locking failure with the holes on the bone plate.

[0004] A bone plate, wherein a through hole is configured on the bone plate, and a plurality of clamping units are configured extending from the hole wall surface toward the hole center, and the plurality of clamping units are arranged at intervals along the circumference of the hole; each of the clamping units has an end on a side away from the hole wall, and each of the end portions is configured with at least two clamping portions arranged at intervals;

[0005] Wherein, the clamping portion of at least one of the clamping units is used to clamp with the thread groove of the fixing member.

[0006] In one embodiment, the end portion has a tapered surface extending toward the center of the hole.

[0007] In one embodiment, the tapered surface of the end portion has an upper surface and a lower surface arranged at an angle, and the angle θ1 between the upper surface and the lower surface satisfies the condition:

[0008] 20°≤θ1≤60°.

[0009] In one of the embodiments, a recess is formed between two adjacent clamping units spaced apart along the circumference of the hole, and one adjacent clamping unit and one recess can together form a group of clamping structures, and multiple groups of the clamping structures are evenly arranged along the circumference of the hole;

[0010] The length L1 of the clamping unit in each group of the clamping structures along the circumferential direction of the hole and the length L2 of the recess along the circumferential direction of the hole meet the condition:

[0011] 0.5L1≤L2≤2L1.

[0012] In one embodiment, the clamping units have at least two groups, the clamping units in each of the at least two groups are located on the same circumference, and the clamping units in different groups are spaced apart along the axial direction of the hole.

[0013] In one embodiment, the clamping units of different groups are arranged in an axially aligned manner along the hole; or

[0014] The clamping units of different groups are staggered along the axial direction of the hole.

[0015] In one embodiment, each of the clamping portions is configured with a peak on one side close to the center of the hole, each of the peaks is at the same distance from the center of the hole, and the peaks are used to clamp with a thread groove of a fixing member installed in the hole.

[0016] In one embodiment, the distance d1 between two adjacent peaks on each of the clamping units satisfies the condition:

[0017] 0.5mm≤d1≤1mm.

[0018] In one embodiment, the length d2 of the clamping unit along the radial direction of the hole satisfies the condition:

[0019] 1mm≤d2≤2mm.

[0020] In one of the embodiments, the clamping unit further comprises a root connected to the end, and the side of the root away from the end is connected to the hole wall of the hole; the upper surface and the lower surface of the root along the axial direction of the hole are both concave structures, and there is a thickness between the upper surface and the lower surface, and the thickness gradually decreases and then gradually increases from the hole wall to the center of the hole;

[0021] When the clamping portion of the clamping unit is clamped in the thread groove of the fixing member, the root portion can be bent.

[0022] In one embodiment, a minimum dimension h1 of the root portion along the axial direction of the hole is smaller than a minimum dimension h2 of the clamping portion along the axial direction of the hole.

[0023] In one embodiment, the length d3 of the root along the radial direction of the hole and the length d2 of the clamping unit along the radial direction of the hole meet the condition:

[0024] 0.3d2≤d3≤0.8d2.

[0025] In one embodiment, the bendable angle θ2 of the root satisfies the condition:

[0026] -15°≤θ2≤+15°;

[0027] The twistable angle θ3 of at least two spaced-apart clamping parts constructed on the end about the radial direction of the hole and the lead angle θ4 of the thread groove of the fixing member meet the conditions:

[0028] 0≤θ3≤2.5θ4.

[0029] The present application also provides a bone plate system, comprising the bone plate described in any one of the above embodiments, and also comprising a fixing member, wherein the fixing member comprises a locking rod and a locking head connected to each other; the locking rod is used to pass through the hole and be fixedly connected to the bone structure to be connected, and the locking head is configured with a threaded groove, and at least two ends of each of the clamping units can be clamped in the threaded groove on the locking head, which can solve at least one of the above technical problems.

[0030] When the bone plate and bone plate system are used to fix and repair the fractured bone structure, the bone plate is firstly brought into contact with the fractured bone structure, and then the fixing member, i.e., the locking screw, is screwed so that the locking rod of the locking screw passes through the hole and is fixedly connected to the bone structure. At the same time, during the screwing process, at least two clamping parts on each clamping unit can be clamped into the thread groove of the locking head of the locking screw. Since each clamping unit in the bone plate is constructed with at least two clamping parts, the locking of the clamping unit and the thread groove of the locking head of the locking screw is relatively stable, and locking failure is not likely to occur, so that the rehabilitation treatment effect of the bone structure after fracture is better and the cycle is shorter. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a bone plate provided in accordance with an embodiment of the present application.

[0032] Figure 2 for Figure 1 A top view of the bone plate is shown.

[0033] Figure 3 A schematic diagram of a bone plate provided in accordance with the second embodiment of the present application.

[0034] Figure 4 for Figure 3 A partial enlarged view of point A shown.

[0035] Figure 5 for Figure 3 A cross-sectional view at point B is shown.

[0036] Figure 6 for Figure 5 A local enlarged view of point C is shown.

[0037] Figure 7 This is a schematic diagram of a first state in which a bone plate and a locking screw in a bone plate system provided in an embodiment of the present application cooperate with each other.

[0038] Figure 8 for Figure 7 A local enlarged view of point D is shown.

[0039] Fig. 9 for Figure 7 The schematic diagram of the second state of the bone plate and the locking screw is shown.

[0040] Fig.10 for Fig. 9 A local enlarged view of point E is shown.

[0041] Fig.11 A schematic diagram of the cooperation between a bone plate and a compression screw in a bone plate system provided in one embodiment of the present application.

[0042] Fig.12 This is a schematic diagram of the cooperation between the clamping unit on the bone plate and the thread groove on the locking head of the locking screw in the bone plate system provided in one embodiment of the present application.

[0043] Fig.13 A schematic diagram of a bone plate provided in the third embodiment of the present application.

[0044] Fig.14 A schematic diagram of a bone plate provided in accordance with the fourth embodiment of the present application.

[0045] Fig.15 A schematic diagram of a bone plate provided in accordance with the fifth embodiment of the present application.

[0046] Fig.16 A schematic diagram of a bone plate provided in accordance with the sixth embodiment of the present application.

[0047] Fig.17 A schematic diagram of a bone plate provided in accordance with the seventh embodiment of the present application.

[0048] Fig.18 for Fig.17 A partial enlarged view of point F is shown.

[0049] Fig.19 A schematic diagram of a bone plate provided in the eighth embodiment of the present application.

[0050] Fig. 20 for Fig.19 A local enlarged view of point G is shown.

[0051] Fig.21 A schematic diagram of a bone plate provided in the ninth embodiment of the present application.

[0052] Fig. 22 for Fig.21 A local enlarged view of point H is shown.

[0053] Fig.23A schematic diagram of a bone plate provided in the tenth embodiment of the present application.

[0054] Fig.24 for Fig.23 A local enlarged view of point M is shown.

[0055] Fig.25 A schematic diagram of a bone plate provided in the eleventh embodiment of the present application.

[0056] Fig.26 for Fig.25 A local enlarged view of point N is shown.

[0057] Fig. 27 A schematic diagram of the connection between a bone plate system and a bone structure provided in one embodiment of the present application.

[0058] Figure markings: 100-bone plate; 110-hole; 120-clamping unit; 121-root; 1211-first curved surface; 1212-second curved surface; 122-end; 1221-upper surface; 1222-lower surface; 1223-peak; 130-chamfer; 140-recess; 200-fixing member; 210-locking rod; 220-locking head; 221-thread groove; 300-pressure screw; 310-pressure rod; 320-pressure head; 400-bone structure; 410-fracture site. DETAILED DESCRIPTION

[0059] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0060] In the description of the present application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 application.

[0061] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0063] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0064] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0065] See also Figure 1-Figure 6 , Figure 1 A schematic diagram of a bone plate 100 provided in an embodiment of the present application is shown. Figure 2 Shows Figure 1 A top view of the bone plate 100 is shown. Figure 3 FIG. 1 is a schematic diagram of a bone plate 100 provided in a second embodiment of the present application. Figure 4 Shows Figure 3A partial enlarged view of point A shown. Figure 5 Shows Figure 3 A cross-sectional view at point B is shown. Figure 6 Shows Figure 5 A local enlarged view of point C is shown.

[0066] A bone plate 100 provided in an embodiment of the present application is configured with a through hole 110, and a plurality of snap-in units 120 are configured extending from the hole wall surface toward the hole center of the hole 110, and the plurality of snap-in units 120 are arranged at intervals along the circumference of the hole 110; each snap-in unit 120 has an end 122 on a side away from the hole wall, and each end 122 is configured with at least two snap-in portions arranged at intervals; wherein, the snap-in portion of at least one snap-in unit 120 is used for snapping with the threaded groove 221 of the fixing member 200.

[0067] When the bone plate 100 is used to fix and repair the fractured bone structure 400, the bone plate 100 is firstly brought into contact with the fractured bone structure 400, and then the fixing member 200, i.e. the locking screw, is screwed so that the locking rod 210 of the locking screw passes through the hole 110 and is fixedly connected with the bone structure 400. At the same time, during the screwing process, at least two clamping parts on each clamping unit 120 can be clamped in the thread groove 221 of the locking head 220 of the locking screw. Since each clamping unit 120 in the bone plate 100 is configured with at least two clamping parts, the locking of the clamping unit 120 and the thread groove 221 of the locking head 220 of the locking screw is relatively stable, and locking failure is not likely to occur, so that the rehabilitation treatment effect of the bone structure 400 after the fracture is better and the cycle is shorter.

[0068] It should be noted that the clamping portion is located on the side surface of the end portion 122 facing the axial direction of the hole 110 .

[0069] See also Figure 6 In one specific embodiment, the projection of the clamping portion on the vertical plane in the axial direction of the through hole 110 is wedge-shaped. Specifically, the axial direction of the hole is Figure 1 , Figure 5 and Figure 6 The zz' direction, that is, the clamping part is in Figure 5 and Figure 6 The projection of the xx'zz' plane in is a wedge, and the length of the wedge ranges from 0.5mm to 1mm, that is, Figure 6 The length of d2 minus the length of d3 is 0.5 mm-1 mm, so that the clamping portion can be easily clamped into the thread groove 221 of the fixing member 200.

[0070] The structure of the bone plate 100 is described in detail below. Figure 7-Figure 27 , Figure 7A schematic diagram of a first state in which a bone plate 100 in a bone plate system provided by an embodiment of the present application cooperates with a locking screw is shown. Figure 8 Shows Figure 7 A local enlarged view of point D is shown. Fig. 9 Shows Figure 7 The bone plate 100 is shown in a second state schematically in cooperation with the locking screw. Fig.10 Shows Fig. 9 A local enlarged view of point E is shown.

[0071] Fig.11 A schematic diagram showing the cooperation between the bone plate 100 and the compression screw 300 in the bone plate system provided in one embodiment of the present application is shown. Fig.12 A schematic diagram showing the cooperation between the clamping unit 120 on the bone plate 100 and the thread groove 221 on the locking head 220 of the locking screw in the bone plate system provided in one embodiment of the present application is shown. Fig.13 FIG. 1 is a schematic diagram of a bone plate 100 provided in a third embodiment of the present application. Fig.14 A schematic diagram of a bone plate 100 provided in a fourth embodiment of the present application is shown. Fig.15 FIG. 1 is a schematic diagram of a bone plate 100 provided in a fifth embodiment of the present application. Fig.16 FIG. 1 is a schematic diagram of a bone plate 100 provided in a sixth embodiment of the present application. Fig.17 A schematic diagram of a bone plate provided in the seventh embodiment of the present application is shown. Fig.18 Shows Fig.17 A partial enlarged view of point F is shown. Fig.19 A schematic diagram of a bone plate provided in the eighth embodiment of the present application is shown. Fig. 20 Shows Fig.19 A local enlarged view of point G is shown. Fig.21 A schematic diagram of a bone plate provided in the ninth embodiment of the present application is shown. Fig. 22 Shows Fig.21 A local enlarged view of point H is shown. Fig.23 A schematic diagram of a bone plate provided in the tenth embodiment of the present application is shown. Fig.24 Shows Fig.23 A local enlarged view of point M is shown. Fig.25 A schematic diagram of a bone plate provided in the eleventh embodiment of the present application is shown. Fig.26 Shows Fig.25 A local enlarged view of point N is shown. Fig. 27 A schematic diagram showing the connection between a bone plate system provided by an embodiment of the present application and a bone structure 400 is shown.

[0072] See also Figure 6The end 122 of the bone plate 100 provided in one embodiment of the present application has a tapered surface extending toward the center of the hole 110. By providing the end 122 with a tapered surface structure extending toward the center of the hole 110, the clamping portion constructed on the end 122 can easily extend into and clamp into the thread groove 221 of the fixing member 200.

[0073] Optionally, the shape of the end portion 122 matches the thread profile of the thread groove 221 of the fixing member 200 .

[0074] See also Figure 6 The tapered surface of the end 122 of the bone plate 100 provided in one embodiment of the present application has an upper surface 1221 and a lower surface 1222 set at an angle, and the angle θ1 between the upper surface 1221 and the lower surface 1222 satisfies the condition: 20°≤θ1≤60°. By setting the angle θ1 between the upper surface 1221 and the lower surface 1222 to be within a range of greater than or equal to 20° and less than or equal to 60°, the inclination angle of the front end of the entire end 122 close to the thread groove 221 is more reasonable than the rear end away from the thread groove 221, thereby making it easy for the clamping portion on the end 122 to extend into and clamp into the thread groove 221 of the fixing member 200.

[0075] In one specific embodiment, the angle θ1 between the upper surface 1221 and the lower surface 1222 is 20°. Of course, in other embodiments, the angle θ1 may also be 45° or 60°.

[0076] See also Figure 1-Figure 3 , Fig.13 , Fig.16 The bone plate 100 provided in one embodiment of the present application has a recess 140 formed between two adjacent snap-fit ​​units 120 arranged at intervals along the circumference of the hole 110. An adjacent snap-fit ​​unit 120 and a recess 140 can together form a group of snap-fit ​​structures. Multiple groups of snap-fit ​​structures are evenly arranged along the circumference of the hole 110. By setting multiple groups of snap-fit ​​structures, the snap-fit ​​between the bone plate 100 and the thread groove 221 of the fixing member 200 is more stable and less prone to locking failure, so that the rehabilitation treatment effect of the fractured bone structure 400 fixed by the bone plate 100 is better and the cycle is shorter. Among them, please refer to Figure 3, the length L1 of the clamping unit 120 in each set of clamping structures along the circumferential direction of the hole 110 and the length L2 of the recess 140 along the circumferential direction of the hole 110 meet the condition: 0.5L1≤L2≤2L1. By setting the length L2 of the recess 140 along the circumferential direction of the hole 110 to be greater than or equal to 0.5 times the length L1 of the clamping unit 120 along the circumferential direction of the hole 110, and less than or equal to 2 times the length L1 of the clamping unit 120 along the circumferential direction of the hole 110, the length distribution of the clamping unit 120 and the recess 140 arranged along the circumference of the hole 110 is more reasonable, so that the connection strength between the clamping unit 120 and the thread groove 221 of the fixing member 200 can be effectively guaranteed.

[0077] In some of the embodiments, the number of groups of the snap-fitting structures is 3-8, and 3-8 groups of snap-fitting structures are evenly arranged along the circumference of the hole 110. In this case, there are 3-8 snap-fitting units 120 and 3-8 recesses 140. In some preferred embodiments, the number of groups of the snap-fitting structures is 4-6, and 4-6 groups of snap-fitting structures are evenly arranged along the circumference of the hole 110. In this case, there are 4-6 snap-fitting units 120 and 4-6 recesses 140.

[0078] In one embodiment, the length L2 of the recess 140 along the circumferential direction of the hole 110 is equal to 0.5 times the length L1 of the clamping unit 120 along the circumferential direction of the hole 110. Of course, in some other embodiments, the length L2 of the recess 140 along the circumferential direction of the hole 110 may also be equal to 0.7 times, 0.8 times, 1 times, 1.3 times, 1.5 times, 1.8 times or 2 times the length L1 of the clamping unit 120 along the circumferential direction of the hole 110.

[0079] See also Fig.14 and Fig.15 In some embodiments, the bone plate 100 has at least two groups of snap-fit ​​units 120, each group of snap-fit ​​units 120 in at least two groups is located on the same circumference, and the snap-fit ​​units 120 of different groups are arranged at intervals along the axial direction of the hole 110. By providing at least two groups of snap-fit ​​units 120 on the bone plate 100, and the snap-fit ​​units 120 of different groups are arranged at intervals along the axial direction of the hole 110, that is, the bone plate 100 can be snap-fitted with the multi-layer thread groove 221 of the fixing member 200, the connection strength between the bone plate 100 and the fixing member 200 is further improved.

[0080] See also Fig.14 and Fig.15 In some embodiments, the bone plate 100 has two groups of snap-fit ​​units 120, which are spaced apart along the axial direction of the hole 110. Of course, in other embodiments, the bone plate 100 may also have three or four groups of snap-fit ​​units 120, which is not particularly limited.

[0081] See also Figure 1 , Figure 5 and Figure 7-Figure 11 In some embodiments, the clip unit 120 on the bone plate 100 has a set.

[0082] See also Fig.14 In some embodiments, different groups of the snap-in units 120 of the bone plate 100 are arranged to be aligned along the axial direction of the hole 110. Fig.15 In some other embodiments, different groups of the snap-in units 120 of the bone plate 100 are staggered along the axial direction of the hole 110. It should be noted that there is no limitation on whether the different groups of snap-in units 120 are aligned or staggered along the axial direction of the hole 110, and it can be selected according to actual usage.

[0083] See also Figure 4 , Fig.12 and Fig.16 Each of the clamping parts of the bone plate 100 provided in one embodiment of the present application is configured with a peak 1223 on one side close to the center of the hole 110, and each peak 1223 is at the same distance from the center of the hole 110, and the peak 1223 is used to clamp with the thread groove 221 of the fixing member 200 installed in the hole 110. By configuring the peak 1223 on the clamping part, the clamping part can easily slide into the thread groove 221 under the guidance of the peak 1223.

[0084] In one specific embodiment, the peak 1223 abuts against the bottom wall of the thread groove 221. Since the end 122 of each clamping unit 120 is constructed with at least two spaced-apart clamping portions, each clamping unit 120 has at least two peaks 1223. Therefore, each clamping unit 120 has at least two peaks 1223, that is, two clamping points abut against the bottom wall of the thread groove 221. This makes the circumferential stability of the locking of the bone plate 100 and the fixing member 200 better. Compared with the situation where one clamping point abuts, the circumferential stability of the locking of the bone plate 100 and the fixing member 200 of the present application is greatly improved.

[0085] In one embodiment, the at least two peaks 1223 are configured with inner side surfaces facing the center of the hole, and when viewed along the axial direction of the hole, the inner side surface is at least two sections of convex arc surfaces that are closely connected or arranged at intervals. Fig.16 The figure shows three convex arc surfaces adjacent to each other; see Figure 4 The figure shows two sections of convex arc surfaces arranged at intervals, that is, the two sections of convex arc surfaces are smoothly transitioned by a plane or a concave surface.

[0086] See also Figure 4, the distance d1 between two adjacent peaks 1223 on each clamping unit 120 of the bone plate 100 provided in an embodiment of the present application satisfies the condition: 0.2mm≤d1≤2mm. By setting the distance d1 between two adjacent peaks 1223 to be greater than or equal to 0.2mm and less than or equal to 2mm, the two peaks 1223 are neither too close nor too far from each other, and can better match the thread of the thread groove 221 with a lead angle; at the same time, the two adjacent peaks 1223 cooperate together, so that the locking of the bone plate 100 and the fixing member 200 is more stable.

[0087] In one specific embodiment, the distance d1 between two adjacent peaks 1223 on each snap-fit ​​unit 120 is 0.2 mm. Of course, in other embodiments, the distance d1 between two adjacent peaks 1223 on each snap-fit ​​unit 120 may also be 0.5 mm, 1 mm or 2 mm.

[0088] See also Figure 1-Figure 4 , Fig.13 In some embodiments, each of the clamping units 120 is configured with two clamping portions, and thus each of the clamping units 120 is configured with two peaks 1223. Fig.16 In some other embodiments, each clamping unit 120 is constructed with three clamping parts, and thus each clamping unit 120 is constructed with three peaks 1223.

[0089] See also Figure 6 , the length d2 of the clamping unit 120 of the bone plate 100 provided in one embodiment of the present application along the radial direction of the hole 110 satisfies the condition: 0.5mm≤d2≤4mm. By setting the length d2 of the clamping unit 120 along the radial direction of the hole 110 to be greater than or equal to 0.5mm and less than or equal to 4mm, the length of the entire clamping unit 120 along the radial direction of the hole 110 is more reasonable, thereby making the screwing clamping process of the clamping unit 120 and the thread groove 221 of the fixing member 200 more convenient.

[0090] In one specific embodiment, the length d2 of the clamping unit 120 along the radial direction of the hole 110 is 0.5 mm. Of course, in other embodiments, the length d2 of the clamping unit 120 along the radial direction of the hole 110 may also be 1 mm, 2 mm, 3 mm or 4 mm.

[0091] See also Figure 6 , Figure 8 and Fig.10The snap-on unit 120 of the bone plate 100 provided in one embodiment of the present application further includes a root 121 connected to the end 122, and the side of the root 121 away from the end 122 is connected to the hole wall of the hole 110; the upper surface and the lower surface of the root 121 along the axial direction of the hole 110 are concave structures, and there is a thickness between the upper surface and the lower surface, and the thickness gradually decreases and then gradually increases from the hole wall to the center of the hole. Specifically, the upper surface of the root 121 along the axial direction of the hole 110 is Figure 6 The first curved surface 1211 in the hole 110 has a lower surface of the root 121 in the axial direction of the hole 110. Figure 6 when the snap-fitting portion of the snap-fitting unit 120 is snap-fitted into the thread groove 221 of the fixing member 200, the root portion 121 can be bent.

[0092] By setting the upper and lower surfaces of the root 121 as concave structures, and the thickness of the concave structure decreases first and then increases from the hole wall to the center of the hole, the root 121 can be bent more easily when the clamping portion is clamped in the thread groove 221 of the fixing member 200, so that the fixing member 200 deflects relative to the axial direction of the hole 110, thereby realizing the universal locking function to adapt to different shapes of bone structures 400 and meet different needs. At the same time, the deformation area of ​​the entire root 121 is fixed, the deformation stress is dispersed, and stress concentration is not easy to occur.

[0093] The clamping unit 120 has a thickness h3 along the axial direction of the hole at the boundary where the end 122 and the root 121 are connected. When the clamping unit 120 is matched with the thread groove of the fixing member, the thickness h3 is substantially equal to the tooth width at the mid-diameter of the thread groove.

[0094] See also Figure 1-4 In some embodiments, the snap-in unit 120 extends in the circumferential direction of the hole 110 and forms a length, and when observing the snap-in unit 120 in the axial direction of the hole 110, the length first gradually decreases from the hole wall to the center of the hole, then remains roughly unchanged, and finally gradually decreases again. The length from the hole wall to the junction of the root 121 and the end portion gradually decreases and then remains roughly unchanged; the length from the junction of the root 121 and the end portion to the snap-in portion of the end portion gradually decreases again, and finally smoothly connects with the peak of the snap-in portion. As a result, each recess 140 forms a petal shape, and multiple recesses 140 form a multi-petal flower shape. Of course, as an optional embodiment, the length has different trends when gradually decreasing in the radial direction. For example, the trend of gradually decreasing is constant. At this time, it is shown in the figure that the two side surfaces of the root 121 or the end 122 observed in the axial direction of the hole 110 are inclined surfaces at angles to each other (such as Fig.25 and Fig.26or, the trend of gradually decreasing is first rapid and then slow, that is, the length decreases from the hole wall to the hole center in a larger amplitude at first and then smaller amplitude, that is, the length decreases quickly at first and then decreases slowly, at this time, the side of the clamping unit 120 forms a concave arc, such as Figure 1-4 Alternatively, the trend of gradually decreasing is first slow and then rapid, that is, the length decreases from the hole wall to the hole center in a smaller amplitude first and then larger, that is, the length decreases slowly first and then decreases quickly, at this time, the side of the clamping unit 120 forms a convex arc, such as Figure 1-4 The two sides of the middle end 122. Optionally, the length may only gradually decrease in the radial direction, that is, the length gradually decreases from the connection between the root 121 and the hole wall to the peak 1223 of the end 122 without having a substantially constant region. Optionally, the length may first remain substantially constant and then gradually decrease in the radial direction; or, the length may first gradually decrease and then remain substantially constant in the radial direction.

[0095] See also Figure 3 In some other embodiments, the length remains approximately unchanged in the area adjacent to the root 121 and the end 122. In this case, the circle where the boundary line between the root 121 and the end 122 lies is used as a reference for calculating the length L2 of the recess 140 along the circumferential direction of the hole 110 and the length L1 of the snap-in unit 120 along the circumferential direction of the hole 110 mentioned above. It should be noted that remaining approximately unchanged means that the length may still vary slightly in this area, including a slight increase or decrease. In this case, the two side surfaces of the area have a smaller angle, such as an angle of -15° to 15° (the angle is 0° when the surfaces of the two side surfaces are parallel to each other; the angle is positive when the surfaces of the two side surfaces intersect on one side of the center of the hole, such as Fig.23 and Fig.24 As shown; when the two side surfaces intersect on one side of the hole wall, the angle is negative, such as Fig.21 and Fig. 22 As shown), optionally, the angle is ±5° or ±10°. When the small amplitude change is a uniform change, the angle between the two side surfaces is a certain value within the range of -15° to 15°. At this time, the two side surfaces form a wedge shape, and optionally, the angle is ±5° or ±10°.

[0096] In some other embodiments, the length of the clamping unit 120 changes in the radial direction so that the two sides of the clamping unit 120 are asymmetric, that is, when the length changes in the radial direction, the edge change trend or change range of the two sides of the clamping unit 120 is inconsistent, and the shape of the two sides can be selected from any one or more combinations of the shapes exemplified in the above text. For example, in a certain section of the clamping unit 120 in the radial direction, one side is a convex arc and the other is a concave arc; or, as Fig.19 and Fig. 20As shown, one side is an arc surface and the other side is an inclined surface (parallel to the hole axis but at an angle to the center line of the clamping unit 120).

[0097] In one specific embodiment, the cross-section of the upper and lower surfaces 1222 of the root 121 along the axial direction of the hole 110 can be circular arc, elliptical arc, triangle, polygon, wave (such as Fig.17 and Fig.18 As shown) or other arbitrary irregular shapes, without special limitation.

[0098] It should be noted that, by setting the concave surfaces of the upper and lower surfaces 1222 of the root 121 along the axial direction of the hole 110, the angle θ1 between the angled upper surface 1221 and the lower surface 1222 of the tapered surface of the end 122 can be set and selected in a wider range, thereby making the upper surface 1221 and the lower surface 1222 of the clamping part more closely fitted with the thread surface of the thread groove 221, making the axial fit of the fixing part 200 and the hole 110 tighter and making the locking of the two more stable.

[0099] See also Figure 6 , the minimum dimension h1 of the root 121 of the bone plate 100 provided in an embodiment of the present application along the axial direction of the hole 110 is less than or equal to the minimum dimension h2 of the clamping portion along the axial direction of the hole 110. By such a configuration, the clamping unit 120 is easy to bend from the root 121, thereby realizing the function of universal locking, and it is difficult to bend from the clamping portion, so that the clamping portion is only clamped, and does not break due to severe deformation to produce debris.

[0100] In one embodiment, the minimum dimension h1 of the root 121 along the axial direction of the hole 110 and the minimum dimension h2 of the clamping portion along the axial direction of the hole 110 meet the condition: 0.5h2≤h1≤5h2. In one specific embodiment, h1=h2. In another specific embodiment, h1=2h2. In another embodiment, h1=3h2. In yet another embodiment, h1=4h2. In one specific embodiment, h1=5h2.

[0101] See also Figure 6 The minimum dimension h1 of the root 121 of the bone plate 100 provided in an embodiment of the present application along the axial direction of the hole 110 satisfies the condition: 0.2 mm ≤ h1 ≤ 0.5 mm. By setting the minimum dimension h1 of the root 121 along the axial direction of the hole 110 to be greater than or equal to 0.2 mm and less than or equal to 0.5 mm, the root 121 of the clamping unit 120 is easy to bend.

[0102] In one specific embodiment, the minimum dimension h1 of the root portion 121 along the axial direction of the hole 110 is 0.2 mm. Of course, in other embodiments, the minimum dimension h1 of the root portion 121 along the axial direction of the hole 110 may also be 0.5 mm or 0.3 mm.

[0103] See also Figure 6 The minimum dimension h2 of the clamping portion of the bone plate 100 provided in an embodiment of the present application along the axial direction of the hole 110 satisfies the condition: 0.2 mm ≤ h2 ≤ 0.5 mm. By setting the minimum dimension h2 of the clamping portion along the axial direction of the hole 110 to be greater than or equal to 0.2 mm and less than or equal to 0.5 mm, the clamping portion can be easily clamped into the thread groove 221.

[0104] In one specific embodiment, the minimum dimension h2 of the clamping portion along the axial direction of the hole 110 is 0.2 mm. In another specific embodiment, the minimum dimension h2 of the clamping portion along the axial direction of the hole 110 is 0.5 mm. In yet another specific embodiment, the minimum dimension h2 of the clamping portion along the axial direction of the hole 110 is 0.3 mm.

[0105] In addition, in some embodiments, h2 is very small or even close to zero. In this case, to ensure that the clamping unit 120 has sufficient strength, h1 still needs to satisfy 0.2 mm ≤ h1.

[0106] See also Figure 6 , the length d3 of the root 121 of the bone plate 100 provided in one embodiment of the present application along the radial direction of the hole 110 and the length d2 of the clamping unit 120 along the radial direction of the hole 110 meet the condition: 0.3d2≤d3≤0.8d2. By defining the relationship between the length d3 of the root 121 along the radial direction of the hole 110 and the length d2 of the clamping unit 120 along the radial direction of the hole 110, the position of the bending deformation zone of the entire clamping unit 120 can be defined accordingly, and further, when the clamping portion is clamped in the thread groove 221 of the fixing member 200, the position of the bending deformation zone of the root 121 can be defined.

[0107] In one specific embodiment, the length d3 of the root 121 along the radial direction of the hole 110 is equal to 0.3 times the length d2 of the clamping unit 120 along the radial direction of the hole 110. Of course, in other embodiments, the length d3 of the root 121 along the radial direction of the hole 110 may also be equal to 0.4 times, 0.5 times, 0.6 times, 0.7 times, 0.75 times or 0.8 times the length d2 of the clamping unit 120 along the radial direction of the hole 110.

[0108] In one embodiment, when the clamping unit 120 is matched with the thread groove of the fixing member 200, the end 122 is tightly clamped with the thread groove 221, and the minor diameter, middle diameter and major diameter of the thread parameters of the fixing member 200 are D1, D2 and D3 respectively, and the difference d2-d3 between d2 and d3 is equal to or slightly greater than the difference D2-D1 between the middle diameter and the minor diameter. Specifically, the difference d2-d3 is equal to 1-1.2 times the difference D2-D1.

[0109] See also Fig. 9 and Fig.10 , the bendable angle θ2 of the root 121 of the bone plate 100 provided in one embodiment of the present application satisfies the condition: -15°≤θ2≤+15°. By setting the bendable angle θ2 of the root 121 to be greater than or equal to -15° and less than or equal to 15°, the root 121 can be bent not only toward the outside of the bone plate 100, but also toward the inside of the bone plate 100, thereby enabling the bone plate 100 to meet different usage requirements and be more adaptable. It should be noted that the value of the bendable angle θ2 of the root 121 less than 0 here means that the root 121 bends downward counterclockwise along the horizontal plane, and the value of the bending angle θ2 of the root 121 greater than 0 means that the root 121 bends upward clockwise along the horizontal plane.

[0110] In one embodiment, the twistable angle θ3 of at least two spaced-apart clamping portions on the end portion 122 around the radial direction of the hole 110 and the lead angle θ4 of the thread groove 221 of the fixing member 200 meet the condition: 0≤θ3≤2.5θ4. By such a configuration, when the end portion 122 is twisted relative to the radial direction of the hole 110, it can better match the thread groove 221 of the fixing member 200.

[0111] In one specific embodiment, the minimum value of the twistable angle θ3 of the at least two spaced-apart clamping portions constructed on the end portion 122 around the radial direction of the hole 110 is 0°.

[0112] In one specific embodiment, the lead angle θ4 of the thread groove 221 of the fixing member 200 is 3°-10°.

[0113] In one specific embodiment, the maximum value of the radial torsion angle θ3 of the at least two spaced-apart clamping portions constructed on the end portion 122 around the hole 110 is the lead angle θ4 of the thread groove 221 of the fixing member 200 + 15°.

[0114] See also Fig. 27 One embodiment of the present application further provides a bone plate system, which includes the bone plate 100 described in any of the above embodiments, and also includes a fixing member 200, see Figure 7-10The fixing member 200 includes a locking rod 210 and a locking head 220 connected to each other. The locking rod 210 is used to pass through the hole 110 and be fixedly connected to the bone structure 400 to be connected. The locking head 220 is configured with a thread groove 221. At least two ends 122 of each clamping unit 120 can be clamped in the thread groove 221 on the locking head 220. Through the cooperation between the bone plate 100 and the fixing member 200, the locking of the bone plate 100 and the thread groove 221 of the locking head 220 of the fixing member 200 is relatively stable, and locking failure is not likely to occur, so that the rehabilitation treatment effect of the bone structure 400 after fracture is better and the cycle is shorter.

[0115] In one embodiment, the locking rod 210 on the fixing member 200 is configured with threads for engagement with the bone structure 400 .

[0116] In one embodiment, the thread provided on the locking head 220 on the fixing member 200 may be continuous or discontinuous; may be single-pitch or multi-pitch; may be a self-tapping groove; and the pitch of the thread may be fixed or gradually decrease from bottom to top.

[0117] In one embodiment, the locking head 220 is gradually reduced from top to bottom, so that when the locking head 220 is screwed into the hole 110 on the bone plate 100, the engagement strength becomes stronger as the locking head 220 is screwed in until it is completely locked.

[0118] In some embodiments, the locking head 220 may be conical, spherical, or tapered in shape.

[0119] In some of the embodiments, the thread of the thread groove 221 on the locking head 220 is generally sharp, and the thread width can be 0.05mm-0.5mm. The thread lead of the locking head 220 is the same as the thread lead of the locking rod 210. The driving connection mode of the fixing member 200 can be hexagonal, plum blossom, cross, etc.

[0120] In some embodiments, the bone plate 100 can be made of pure titanium, titanium alloy, stainless steel, polyetheretherketone or composite materials. The clamping unit 120 can be made using a 3D printing process or a traditional machining process. The bone plate 100 of the present invention is suitable for fractures of multiple parts of the human humerus, tibia, femur, clavicle, fibula, ulna, radius, hands and feet, etc. The surface shape of the bone plate 100 can be straight, curved, arched, flat or contoured according to the shape of the bone. The overall shape of the bone plate 100 can be T-shaped, Y-shaped, L-shaped or other shapes.

[0121] When the bone plate 100 in the bone plate system provided in the present application cooperates with the fixing member 200, the root 121 of the snap-in unit 120 can bend, thereby causing the fixing member 200 to deflect axially relative to the hole 110, thereby enabling the bone plate system to adapt to different bone structure 400 shapes and meet different needs.

[0122] See also Fig.11 and Fig. 27 The bone plate system provided in one embodiment of the present application further includes a compression screw 300, which includes a compression rod 310 and a compression head 320 connected to each other; the compression rod 310 is used to pass through the hole 110 on the bone plate 100 and be fixedly connected to the bone structure 400 to be connected. It should be noted that the compression rod 310 of the compression screw 300 is not configured with a thread groove 221, while the locking rod 210 of the fixing member 200, that is, the locking rod 210 of the locking screw is configured with a thread groove 221. The compression screw 300 pulls the bone plate 100 toward the surface of the bone structure 400, and the relative stability of the bone plate 100 and the bone structure 400 is achieved through the friction between the bone plate 100 and the bone structure 400.

[0123] In the bone plate system provided by the present application, when the axis of the fixing member 200 coincides with the axis of the hole 110 on the bone plate 100, the fixing member 200 achieves vertical locking, such as Figure 7 When the axis of the fixing member 200 and the axis of the hole 110 on the bone plate 100 form an acute angle, the fixing member 200 achieves universal locking.

[0124] See also Fig. 27 It should be noted that when a patient's fracture occurs, bone cracks are generally generated. When fixing the bone plate 100, the cracks at the fracture site 410 must first be spliced. After the splicing is completed, a bone plate 100 of suitable size and shape is selected and placed at the fracture site 410. According to the direction of the crack, a bottom hole is drilled through the hole 110 at a certain angle, and then the depth of the bottom hole is measured. A pressure screw 300 of suitable length is selected for screwing in. During the screwing in process, the fracture bone surface is pulled together, and the fracture fragment is reset. The bone plate 100 is completely pressed against the bone surface using the same method. Next, a hole 110 at a suitable position is selected from the remaining holes 110 of the bone plate 100 for implantation of the fixing member 200. In the same manner as above, a bottom hole with a maximum inclination angle of 15° is drilled with the aid of an instrument, and a matching driver is selected to screw the fixing member 200 along the bottom hole until a stable engagement and locking occurs between the locking head 220 and the clamping portion. At this time, a strong angle fixation is formed between the bone plate 100, the fixing member 200, the compression screw 300 and the bone.

[0125] It should be noted that the bone plate system provided in the present application allows the doctor to remove the already locked fixing member 200 and the compression screw 300 and perform a second locking implantation, and the second implantation can also achieve a stable locking effect.

[0126] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0127] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A bone plate, characterized in that: The bone plate is configured with a through hole (110), and a plurality of clamping units (120) are configured extending from the hole wall surface of the hole (110) toward the hole center, and the plurality of clamping units (120) are arranged at intervals along the circumference of the hole (110); each of the clamping units (120) has an end (122) on a side away from the hole wall, and each of the end (122) is configured with at least two clamping portions arranged at intervals; Wherein, the clamping portion of at least one of the clamping units (120) is used for clamping with the thread groove (221) of the fixing member (200).

2. The bone plate according to claim 1, characterized in that The end portion (122) has a tapered surface extending toward the center of the hole (110).

3. The bone plate according to claim 2, characterized in that: The tapered surface of the end portion (122) comprises an upper surface (1221) and a lower surface (1222) arranged at an angle, and an angle θ1 between the upper surface (1221) and the lower surface (1222) satisfies the condition: 20°≤θ1≤60°.

4. The bone plate according to claim 1, characterized in that: A recess (140) is formed between two adjacent clamping units (120) arranged at intervals along the circumference of the hole (110); an adjacent clamping unit (120) and a recess (140) can together form a group of clamping structures, and a plurality of groups of the clamping structures are evenly arranged along the circumference of the hole (110); Wherein, the length L1 of the clamping unit (120) in each group of the clamping structures along the circumferential direction of the hole (110) and the length L2 of the recess (140) along the circumferential direction of the hole (110) satisfy the condition: 0.5L1≤L2≤2L1.

5. The bone plate according to claim 1, characterized in that: The clamping units (120) have at least two groups, and the clamping units (120) in each of the at least two groups are located on the same circumference, and the clamping units (120) in different groups are arranged at intervals along the axial direction of the hole (110).

6. The bone plate according to claim 5, characterized in that Different groups of the clamping units (120) are arranged in an aligned manner along the axial direction of the hole (110); or The clamping units (120) of different groups are arranged in an axially staggered manner along the hole (110).

7. The bone plate according to claim 1, characterized in that A peak (1223) is constructed on one side of each of the clamping portions close to the center of the hole (110); each of the peaks (1223) is at the same distance from the center of the hole (110); and the peaks (1223) are used to clamp with a thread groove (221) of a fixing member (200) installed in the hole (110).

8. The bone plate according to any one of claims 1 to 7, characterized in that: The clamping unit (120) further comprises a root portion (121) connected to the end portion (122), and a side of the root portion (121) facing away from the end portion (122) is connected to the hole wall of the hole (110); the upper surface and the lower surface of the root portion (121) along the axial direction of the hole (110) are both concave structures, and there is a thickness between the upper surface and the lower surface, and the thickness gradually decreases and then gradually increases from the hole wall to the hole center; When the clamping portion of the clamping unit (120) is clamped in the thread groove (221) of the fixing member (200), the root portion (121) can be bent.

9. The bone plate according to claim 8, characterized in that The radial length d3 of the root portion (121) along the hole (110) and the radial length d2 of the clamping unit (120) along the hole (110) satisfy the following condition: 0.3d2≤d3≤0.8d2.

10. The bone plate according to claim 8 or 9, characterized in that: The bendable angle θ2 of the root (121) satisfies the condition: -15°≤θ2≤+15°; The torsion angle θ3 of at least two spaced-apart clamping portions constructed on the end portion (122) around the radial direction of the hole (110) and the lead angle θ4 of the thread groove (221) of the fixing member (200) satisfy the following conditions: 0≤θ3≤2.5θ4.

11. A bone plate system, characterized in that: A bone plate comprising any one of claims 1 to 10, further comprising a fixing member (200), wherein the fixing member (200) comprises a locking rod (210) and a locking head (220) connected to each other; The locking rod portion (210) is used to pass through the hole (110) and be fixedly connected to the bone structure (400) to be connected, and the locking head (220) is configured with a thread groove (221), and at least two end portions (122) of each of the snap-in units (120) can be snap-fitted into the thread groove (221) on the locking head (220).

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