Bone fixation plate

Abstract

A bone fixation plate may be configured to be secured to a bone. The plate body may include a first portion that is substantially planar for placement on a long portion of the bone. The plate body may include a second portion that is disposed at an angle to the first portion for placement on a head of the bone. The second portion may define a distal edge that is distal from the first portion. The bone fixation plate may include a fragment hook extension that extends from the distal edge of the plate body. The fragment hook extension may be configured to secure a fracture on a distal portion of the bone. The fragment hook extension may include one or more hooks that extend beyond the plate body. Each of the one or more hooks may be configured to engage the distal portion of the bone.

Description

BONE FIXATION PLATECROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims the benefit of Provisional U.S. Patent Application No. 63 / 650,092, filed May 21, 2024, the entire disclosure of which is hereby incorporated by reference herein in its entirety.BACKGROUND

[0002] A variety of fixation devices for the reduction of bone or bone fragments are well known. Some fractures, including wrist fractures, can be difficult to align and treat. Alignment and fixation have been typically performed by one of several methods, including casting, external fixation, and interosseous wiring. Casting is noninvasive, but may not be able to maintain alignment of the fracture where many bone fragments exist. Therefore, as an alternative, external fixators may be used. External fixators utilize a method known as ligamentotaxis, which provides distraction forces across the joint and permits the fracture to be aligned based upon the tension placed on the surrounding ligaments. However, while external fixators can maintain position, it may nevertheless be difficult in certain fractures to first properly align the bones. In addition, external fixators are often not suitable for fractures resulting in multiple bone fragments. In addition, external fixation is associated with reflex sympathetic dystrophy, stiffness, and pin complications. Moreover, with some fractures, movement helps to facilitate rehabilitation, and this movement is prevented by external fixation. Interosseous wiring is an invasive procedure whereby screws are positioned into the various fragments and the screws are then wired together as bracing. This is a difficult and time consuming procedure. Moreover, unless the bracing is quite complex, the fracture may not be properly stabilized.

[0003] As a result, fixation of fractures, including those of the wrist have more recently been performed using bone fixation plates. Attachment of a bone fixation plate to a fractured bone is accomplished by first reducing the fracture fragment(s) and subsequently attaching the bone fixation plate to the bone on opposite sides of the fracture site(s) using bone screws or the like. It is therefore important in many instances to ensure that the bone fixation plate is properly positioned on the bone to ensure that the bone fragment(s) are adequately reduced. Thus, the bone fixation plate is temporarily affixed to the bone, and a medical image (e.g., X-ray)determines whether the fracture site is adequately reduced before the bone fixation plate is permanently affixed to the bone.SUMMARY

[0004] The application is generally related to devices and methods used to hold bone fragments to bones, for example, such as volar distal radius fixation.

[0005] A bone fixation plate may be configured to be secured to a bone. The bone fixation plate may include a plate body having a top surface and a bottom surface. The bottom surface may be a bone abutment surface. The plate body may include a first portion that is substantially planar for placement on a long portion of the bone. The plate body may include a second portion that is disposed at an angle to the first portion for placement on a head of the bone. The second portion may define a distal edge that is distal from the first portion. The plate body may include a first plurality of bone screw holes arranged in the second portion. Each of the first plurality of bone screw holes may extend from the top surface to the bottom surface. The plate body may include a second plurality of bone screw holes arranged in the first portion. Each of the second plurality of bone screw holes may extend from the top surface to the bottom surface. The bone fixation plate may include a fragment hook extension that extends from the distal edge of the plate body. The fragment hook extension may be configured to secure a fracture on a distal portion of the bone. The fragment hook extension may include one or more hooks that extend beyond the plate body. Each of the one or more hooks may be configured to engage the distal portion of the bone.

[0006] The fragment hook extension may include a plate portion disposed between the one or more hooks and the plate body. The fragment hook extension may be rounded such that the plate defines a cross-sectional shape that matches the distal portion of the bone. The fragment hook extension may be monolithic with the plate body. The fragment hook extension may include three hooks. The hooks may be evenly spaced. Each of the hooks may define a pointed end. The pointed end may define a portion of the respective hook that tapers to a point. The hooks may be oriented to restrict movement of a bone fragment associated with the fracture on the distal portion of the bone. The plate body may include an opening through at least a portion of the first portion and a portion of the second portion. The opening may define a profile that substantially matches an outer profile of the plate body. The opening may be configured toenable viewing of a fracture in the bone. The first portion may extend along a longitudinal direction defined by a longitudinal axis. The fragment hook extension may extend from a side portion of the distal edge of the plate body. The fragment hook extension may extend beyond the distal edge of the plate body. The side portion may be offset from a center of the plate body in a transverse direction that is perpendicular to the longitudinal direction. At least one of the one or more hooks extends beyond the plate body in the transverse direction. The bone fixation plate may include an attachment hole configured to receive a fastener to secure a guide block to the bone fixation plate. The second portion may be curved away from the longitudinal axis. The bone fixation plate may include a plurality of bone screws configured to be received by the plurality of bone screw holes. The bone abutment surface may define a contour that corresponds to a shape of the bone.

[0007] A first bone fixation plate may include an asymmetric plate body and a first aperture extending through the plate body. The asymmetric plate body may include an attachment portion configured to be secured to a second bone fixation plate that is attached to a bone. The asymmetric plate body may include a hook portion configured to extend from the attachment portion at an angle to engage a bone fragment that is proximate to a distal end of the bone. The first aperture may be configured to receive a fastener to enable proximal-distal adjustment of the hook portion with respect to the bone while the attachment portion remains aligned with the bone.

[0008] Additional features and advantages are realized through the system of the present invention. Other embodiments and aspects of the disclosure are described in detail herein. For a better understanding of the disclosure with advantages and features, refer to the description and to the drawings.BRIEF DESCRIPTION OF THE DRAWINGS

[0009] FIG. 1 A is a top view of an example hook attachment plate attached to an example two-column volar distal radius plate (TCP) that is attached to a radius bone.

[0010] FIG. IB is a side view of the example hook attachment plate of FIG. 1 A attached to the example TCP that is attached to the radius bone.

[0011] FIG. 1C is a top view of the example hook attachment plate of FIG. 1A.

[0012] FIG. ID is a side perspective view of the hook attachment plate of FIG. 1A.

[0013] FIG. IE is a front perspective view of the hook attachment plate of FIG. 1 A.

[0014] FIG. IF is a top view of another example hook attachment plate.

[0015] FIG. 1G is a perspective view of an example fastener for use with a hook attachment plate.

[0016] FIG. 2A is a top view of another example hook attachment plate.

[0017] FIG. 2B is a side perspective view of the hook attachment plate of FIG. 2A.

[0018] FIG. 2C is a front perspective view of the hook attachment plate of FIG. 2A.

[0019] FIG. 3A is a perspective view of an example TCP with an articular fragment hook extension.

[0020] FIG. 3B is a front view of another example TCP with an articular fragment hook extension.

[0021] FIG. 3C is a side view of the example TCP of FIG. 3B.

[0022] FIG. 3D is a front view of another example TCP with an articular fragment hook extension shown attached to a radius bone.

[0023] FIG. 3E is a top view of the example TCP of FIG. 3 A.

[0024] FIG. 3F is a top view of the example TCP of FIG. 3B.

[0025] FIG. 3G is a top view of the example TCP of FIG. 3D.

[0026] FIG. 4A is a perspective view of an example articular fragment hook plate used with a TCP and shown attached to a radius bone.

[0027] FIG. 4B is a top view of another example articular fragment hook plate used with a TCP and shown attached to a radius bone.

[0028] FIG. 4C is a perspective view of the example articular fragment hook plate of FIG. 4B.

[0029] FIG. 4D is a perspective view of the example articular fragment hook plate of FIG. 4A.

[0030] FIG. 4E is a top view of the example articular fragment hook plate of FIG. 4B.

[0031] FIG. 4F is a front view of the example articular fragment hook plate of FIG. 4B.

[0032] FIG. 4G is a side view of the example articular fragment hook plate of FIG. 4B.

[0033] FIG. 5A is a side view of an example volar ulnar corner plate shown attached to a radius bone.

[0034] FIG. 5B is a perspective view of the example volar ulnar corner plate of FIG. 5 A.

[0035] FIG. 5C is a top view of the example volar ulnar corner plate of FIG. 5 A.

[0036] FIG. 6A is a top perspective view of an example volar radial column plate shown attached to a radius bone next to the example volar ulnar corner plate of FIG. 5 A.

[0037] FIG. 6B is a side view of the example volar radial column plate of FIG. 6A.

[0038] FIG. 6C is a top view of the example volar radial column plate of FIG. 6A.

[0039] FIG. 7A is a top view of an example TCP guide block shown mounted over an example TCP.

[0040] FIG. 7B is a side view of the example TCP guide block of FIG. 7A.DETAILED DESCRIPTION

[0041] In furtherance of the brief description provided above and associated textual detail of each of the figures, the following description provides additional details of example embodiments.

[0042] Detailed illustrative examples are disclosed herein. However, specific functional details disclosed herein are merely representative for purposes of describing exampleembodiments. Examples may, however, be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.

[0043] Accordingly, while examples are capable of various modifications and alternative forms, embodiments are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that there is no intent to limit examples to the particular forms disclosed. To the contrary, examples are to cover all modifications, equivalents, and alternatives falling within the scope of examples.

[0044] It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, steps, and / or calculations, these elements, steps, and / or calculations should not be limited by these terms. These terms are only used to distinguish one element, step, and / or calculation from another. For example, a first calculation could be termed a second calculation, and, similarly, a second step could be termed a first step, without departing from the scope of this disclosure. As used herein, the term “and / or” and the “ / ” symbol includes any and all combinations of one or more of the associated listed items.

[0045] As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises.” “comprising,” “includes"” and / or “including,” when used herein, specify the presence of stated features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. Therefore, the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments.

[0046] It should also be noted that in some alternative implementations, the functions / acts noted may occur out of the order noted in the figures. For example, two figures shown in succession may in fact be executed substantially concurrently or may sometimes be executed in the reverse order, depending upon the functionality / acts involved.

[0047] Herein, example embodiments of the present disclosure will be described in detail.

[0048] The exemplary embodiments described herein relate to a system and method for the fixation of bone fractures of the distal radius and other bones of a body. The exemplary systemsand methods described herein may also be used to strengthen poor quality bone such as, for example, osteoporotic bone. An exemplary bone fixation plate may be formed with a substantially triangular profile and comprises a window extending therethrough to aid in positioning of the bone plate over a target portion of a bone. In an exemplary embodiment, the bone plate may be generally shaped as an isosceles triangle with a first wall thereof configured to rest substantially perpendicular to a longitudinal axis of the radius while second and third walls thereof extend away from the first wall to converge at an intersection which, when the plate is positioned in a desired location, is located substantially over a longitudinal axis of the radius. The first wall may include a plurality of locking holes extending therethrough to receive fixation elements (e.g., bone screws and / or pins) for securing the bone plate to a condyle of a target radius. In addition, a compression hole and / or a variable angle plate hole is included at the intersection of the second and third walls to secure the bone plate to the shaft of the radius.

[0049] During fixation of a distal radius fracture, surgeons may encounter (e.g., at the end of fixation using a two-column volar distal radius plate (TCP)) that a previously undetected mobile fragment exists, often on the volar distal ulnar corner. Such fragment mobility is often obscured by soft tissue.

[0050] An articular fragment hook plate may be attached to an already implanted TCP. The articular fragment hook plate may include features to address a mobile fragment (e.g., at the volar distal ulnar corner), for example, without removing the already implanted TCP.

[0051] FIGs. 1A-1E depict an example hook attachment plate 100. The hook attachment plate 100 may be configured to be secured to a second bone fixation plate 150 (e.g., such as a TCP) that is already attached to a bone 105 (e.g., such as a radius bone). The hook attachment plate 100 may be a bone fixation plate that is configured to engage a bone fragment 107 that is proximate to a distal end 106 of the bone 105. The hook attachment plate 100 may be configured to conform to the distal radius of a right or left arm. FIG. 1 A is a top view of the hook attachment plate 100 attached to the second bone fixation plate 150 that is attached to the bone 105. FIG. IB is a side view of the hook attachment plate 100 attached to the second bone fixation plate 150 that is attached to the bone 105. FIG. 1C is a top view of the hook attachment plate 100. FIG. ID is a side perspective view of the hook attachment plate 100. FIG. IE is a front perspective view of the hook attachment plate 100. The hook attachment plate 100 may beformed, for example, of titanium, a titanium alloy, a stainless steel, or polyehteretherketone (“PEEK”).

[0052] The hook attachment plate 100 may include an asymmetric plate body 110 and a plurality of apertures 111, 113, 115, 117. In particular, the hook attachment plate 100 may define a first bone screw hole 111 having a first diameter, a first aperture 115 that is defines a width that corresponds with the first diameter, a plurality of second apertures 113, and a second bone screw hole 117. The first bone screw hole 111 and / or the second bone screw hole 117 may be variable angle locking holes.

[0053] The hook attachment plate 100 (e.g., the asymmetric plate body 110) may define a top surface 112 (e.g., an upper surface) and a bottom surface 114 (e.g., an opposing lower surface). The bottom surface 114 may be a bone contacting (e.g., abutment) surface and / or a plate contacting (e.g., abutment) surface. The hook attachment plate 100 (e.g., the asymmetric plate body 110) may include a first portion 120, a second portion 132, and a third portion 130. The first portion 120 may define a convex portion of the bottom surface 114. The second portion 132 and the third portion 130 may define a concave portion of the bottom surface 114. The first portion 120 may extend along a first axis 121 (e.g., a longitudinal axis). The first portion 120 may include the first bone screw hole 111 and the first aperture 115. The first portion 120 may be configured to attach the hook attachment plate 100 to the bone 105 and / or the second bone fixation plate 150 that is attached to the bone 105. The first portion 120 may be configured to be secured to the second bone fixation plate 150. The first portion 120 may be located proximate to an opening 152 on the second bone fixation plate 150, for example, to align the first bone screw hole 111 with the opening 152. The first portion 120 (e.g., part of the bottom surface 114) may rest on the portion of the second bone fixation plate 150 proximate to the opening 152, for example, to keep the hook attachment plate 100 from rocking when biomechanical tension is applied.

[0054] The second bone screw hole 117 may be configured to receive a fastener 129 (e.g., such as a bone screw) that is configured to be secured to the bone 105 (e.g., proximate to the distal end 106). The second bone screw hole 117 may be angled back toward the bone 105 such that the fastener 129 can securely hold the bone fragment 107 to the bone 105.

[0055] The first portion 120 (e.g., the first aperture 115) may be configured to receive a fastener (e.g., such as fastener 127 and / or fastener 160 shown in FIG. 1G) for securing the hook attachment plate 100 to the second bone fixation plate 150. For example, the fastener may be received by the first aperture 115 of the hook attachment plate 100 and a machine treaded hole on the second bone fixation plate 150. The fastener may be a machine threaded fastener, an anchor, a rivet, a bayonet, etc. The first aperture 115 may be slotted. For example, the first aperture 115 may extend along the first axis 121. The first aperture 115 may allow proximal- distal adjustment of the third portion 130, for example, to accommodate varying anatomy and / or allow for fragment reduction. The hook attachment plate 100 (e.g., the first portion 120) may define a recess 116 that surrounds the first aperture 115. The recess 116 may be configured to countersink a head of the fastener.

[0056] The first bone screw hole 111 may be located on the first portion 120. The first portion 120 (e.g., the first bone screw hole 111) may be configured to receive a fastener 125 that is configured to be secured to the bone 105 (e.g., through the second bone fixation plate 150). The first bone screw hole 111 may define a threaded region that is configured to correspond with the threads of the fastener 125. The first aperture 115 and the second bone screw hole 117 may enable positioning of the third portion 130 proximate to different areas on the distal end 106 of the bone 105. The second apertures 113 (e.g., k-wire holes) may be holes that are configured to receive k-wire or a hook instrument, for example, during fixation. For example, the second apertures 113 may permit insertion of a K-wire (not shown) therethrough to aid in positioning the hook attachment plate 100.

[0057] The hook attachment plate 100 may include one or more hooks 134 (e.g., a hook portion) that extend from a distal edge 122 of the asymmetric plate body 110. The third portion 130 may extend along a third axis 125 that is disposed a second angle A2 from the second axis 123. The third portion 130 may define the distal edge 122 of the asymmetric plate body 110. The third portion 130 may include the second bone screw hole 117. The third portion 130 (e.g., the one or more hooks 134) may be configured to engage with an articular fragment (e.g., such as a volar lip fragment). For example, each of the plurality of hooks 134 may define a hook end 135 that is configured to engage the bone fragment 107. The hook end 135 may taper to a pointsuch that the hook end 135 is a pointed end of the respective on of the plurality of hooks 134. The plurality of hooks 134 may include a first hook that extends from the distal edge 122 proximate to a first side 126 of the asymmetric plate body 110 and a second hook that extends from the distal edge 122 proximate to a second side 128 of the asymmetric plate body 110.

[0058] The first bone screw hole 111 may be offset from a center of the first portion 120 defined by the first axis 121 in a transverse direction that is perpendicular to the first axis 121. For example, the first bone screw hole 111 may be configured (e.g., offset) to allow a bone screw to extend through the first bone screw hole 111, through a viewing hole opening 152 in the second bone fixation plate 150, and into the bone 105.

[0059] The hook attachment plate 100 (e.g., the asymmetric plate body 110) may define a cross-sectional shape that matches the distal end 106 of the bone 105. Each of the plurality of hooks 134 may continue the cross-sectional shape of the hook attachment plate 100 (e.g., the asymmetric plate body 110). Alternatively, the plurality of hooks 134 may define an alternate cross-sectional shape (e.g., a different radius, angle, etc. than the asymmetric plate body 110). Additionally or alternatively, the plurality of hooks 134 may be straight. For example, the plurality of hooks 134 may extend (e.g., from the distal edge 122) at an angle toward the bone 105 (e.g., bone fragment 107).

[0060] The third portion 130 may be offset from the first portion 120 in a transverse direction that is substantially perpendicular to the longitudinal direction. The third portion 130 may define a first side 126 (e.g., an ulnar side) and an opposed second side 128 (e.g., a radial side). The second side 128 of the third portion 130 may be offset from a radial side 136 of the first portion 120 by a range of 40 to 80 percent (e.g., such as 60 percent) of a distance DI between an ulnar side 134 of the first portion 120 and the radial side 136 of the first portion 120. The second portion 132 may be an angled section of the hook attachment plate 100. The hook attachment plate 100 (e.g., the second portion 132) may define a lateral jog to place the hooks 134 ulnarly relative to the attachment screw 127 while keeping the direction of the first aperture 115 in line with the shaft of the bone 105. The second portion 132 may be configured to extend from the first portion 120 at an angle Al, for example, to enable the hooks 134 to engage the bone fragment 107 that is proximate to the distal end 106 of the bone 105.

[0061] The hook attachment plate 100 (e.g., the second portion 132) may provide an offset (e.g., an angled or parallel offset) for the plurality of hooks 134 from the first portion 120. For example, the second portion 132 may offset the plurality of hooks 134 from the first portion 120 relative to the diaphysis of the bone 105. The second portion 132 may be configured to enable the plurality of hooks 134 to anchor a bone fragment (e.g., such as the bone fragment 107) that is spaced away from a center portion 108 of the distal end 106 of the bone 105. For example, the offset may be configured to enable the plurality of hooks 134 to engage the bone fragment 107 proximate to the distal end 106 of the bone 105. The amount of the offset provided by the second portion 132 may vary depending on the amount of offset required. As such, the hook attachment plate 100 may be made with different offsets and / or angles (e.g., such as angle Al) to accommodate desired outcomes.

[0062] The hook attachment plate 100 may define a first angle Al that is measured between the second side 128 (e.g., a third axis 125 extending along the second side 128) of the third portion 130 and a second axis 123 extending through a center of the second bone screw hole 117 and an upper (e.g., distal) center of the first aperture 115. The third portion 130 may define the second bone screw hole 117 that is configured to receive the fastener 129 that secures the bone fragment 107 to the second bone fixation plate 150. For example, the second bone screw hole 117 may be located on the third portion 132 of the asymmetric plate body 110. It should be appreciated that although the second portion 132 of the asymmetric plate body 110 is shown as angled, the second portion 132 may be curved to provide the offset for the plurality of hooks 134.

[0063] The first portion 120 may define the first axis 121. The first axis 121 may extend through a midpoint (e.g., equal distance from the ulnar side 134 of the first potion 120 and the radial side 136 of the first portion 120) of the first portion 120. The second axis 123 may extend through a midpoint of the second portion 132. The second axis 123 may extend at the first angle Al relative to the third axis 125. For example, the second portion 132 may extend along the second axis 123 that is disposed at a first angle Al from the third axis 125. The first angle Al may be in a range of 10 to 50 degrees, for example, such as 25 degrees. The first aperture 115 may be slotted (e.g., elongated) along a direction defined by the first axis 121. When the first aperture 115 is slotted, the first aperture 115 may enable proximal- distal adjustment of theplurality of hooks 134, for example, to accommodate varying anatomy and allow for fragment reduction. The proximal-distal adjustment of the plurality of hooks 134 may be along the first axis 121.

[0064] The first portion 120 may define a lower surface 124 that is convex. The third portion 130 may define a lower surface 136 that is concave. The bottom surface 114 of the hook attachment plate 100 (e.g., the asymmetric plate body 110) may include the lower surface 124 and the lower surface 136. For example, the lower surface 124 of the first portion 120 and the lower surface 136 of the third portion 130 may be configured to match the contours of the bone 105 (e.g., and the second bone fixation plate 150) such that the first portion 120 and the third portion 130 abut the second bone fixation plate 150 and / or engage (e.g., abut or penetrate) the bone 105 when secured to the bone 105 and / or the second bone fixation plate 150.

[0065] When the hook attachment plate 100 is subject to physiological loading (e.g., repeated physiological loading), an attachment fastener (e.g., a fastener received through the first aperture 115) may loosen. The hook attachment plate 100 may be configured with one or more methods to prevent loosening of a fastener received through the first aperture 115. For example, the hook attachment plate (e.g., the first aperture 115) may include a pattern of repeating circumferential peaks and valleys as shown in FIG. IF, thread deformation by staking or swaging, conical thread pullout, variable pitch thread, and / or a recess in the thread of the fastener fitted with a polymeric plug that interferes with the mating thread.

[0066] FIG. IF depicts another example hook attachment plate 100' that is configured similarly to the hook attachment plate 100. The hook attachment plate 100' (e.g., the first aperture 115') may be configured to prevent loosening of a fastener (e.g., such as the fastener 160 shown in FIG. 1G) received in the first aperture 115'. The first portion 110 (e.g., the first aperture 115') may include a pattern of repeating peaks 119' (e.g., circumferential peaks) and valleys 118' (e.g., circumferential valleys) that surround the first aperture 115'. The peaks 119' may be referred to as ridges or raised areas between respective valleys 118'. For example the peaks 119' and valleys 118' may be located within the recess 116' that surrounds the first aperture 115'. When the fastener is tightened, interference between peaks 119' and valleys 118' with corresponding features of the fastener may create a form fit engagement between the fastener and the hook attachment plate 100' which has to be overcome when outside forces are attempting toloosen the fastener. For example, the peaks 119' may abut respective peaks (e.g., such as the peaks 165 shown in FIG. 1G) of the fastener to resist a loosening rotational force applied to the fastener.

[0067] It should be appreciated that the hook attachment plate 100' is not limited to the number, size, and / or geometrical shape of the peaks 119' and valleys 118' shown in FIG. IF. Rather, the hook attachment plate 100' may include more or less of the peaks 119' and valleys 118' and / or the peaks 119' and valleys 118' may be alternatively sized and / or shaped.

[0068] FIG. 1G depicts an example fastener 160 for use with a bone fixation plate (e.g., such as the hook attachment plate 100 shown in FIGs. 1A-1E and / or the hook attachment plate 100' shown in FIG. IF). The fastener 160 may include a shank 161 extending from a head 162. The shank 161 may be threaded (e.g., the entire length of the shank 161 may be threaded). The head 162 may define a lower surface 163 that is proximate to the shank 161. The lower surface 163 may include a pattern of repeating peaks 165 (e.g., circumferential peaks) and valleys 164 (e.g., circumferential valleys) that surround the shank 161. The peaks 165 may be referred to as ridges or raised areas between respective valleys 164. The fastener 160 (e.g., the peaks 165 and valleys 164) may be configured to prevent loosening of the fastener 160 from the bone fixation plate. The peaks 165 may be configured to engage (e.g., be received within) respective valleys (e.g., such as valleys 118' shown in FIG. IF) of the bone fixation plate. The valleys 164 may be configured to engage (e.g., receive) respective peaks (e.g., such as peaks 119' shown in FIG. IF) of the bone fixation plate. For example, the peaks 165 may abut respective peaks (e.g., such as the peaks 119' shown in FIG. IF) of the bone fixation plate to resist a loosening rotational force applied to the fastener 160.

[0069] It should be appreciated that the fastener 160 is not limited to the number, size, and / or geometrical shape of the peaks 165 and valleys 164 shown in FIG. 1G. Rather, the fastener 160 may include more or less of the peaks 165 and valleys 164 and / or the peaks 165 and valleys 165 may be alternatively sized and / or shaped.

[0070] FIGs. 2A-2C depict another example hook attachment plate 200. FIG. 2A is a top view of the hook attachment plate 200. The hook attachment plate 200 may be configured to be secured to a TCP (e.g., such as the second bone fixation plate 150 shown in FIGs. 1 A and IB) that is already attached to a bone (e.g., such as the bone 105 shown in FIGs. 1A and IB). Thehook atachment plate 200 may be a bone fixation plate that is configured to engage a bone fragment (e.g., such as bone fragment 107 shown in FIGs. 1A and IB) that is proximate to a distal end (e.g., such as distal end 106 shown in FIGs. 1A and IB) of the bone. FIG. 2B is a side perspective view of the hook attachment plate 200. FIG. 2C is a front perspective view of the hook atachment plate 200. The hook attachment plate 200 may be formed, for example, of titanium, a titanium alloy, a stainless steel, or PEEK.

[0071] The hook attachment plate 200 may include an asymmetric plate body 210 and a plurality of apertures 211, 215, 217. In particular, the hook attachment plate 200 may define a first aperture 211 having a first diameter, a second aperture 215 that defines a width that corresponds with the first diameter, and a plurality of bone screw holes 217.

[0072] The hook attachment plate 200 (e.g., the asymmetric plate body 210) may define a top surface 212 (e.g., an upper surface) and a botom surface 214 (e.g., an opposing lower surface). The bottom surface 214 may be a bone contacting surface and / or a plate contacting surface. The hook attachment plate 200 (e.g., the asymmetric plate body 210) may include a first portion 220, a second portion 232, and a third portion 230. The first portion 220 may define a convex portion of the botom surface 214. The second portion 232 and the third portion 230 may define a concave portion of the bottom surface 214. The first portion 220 may extend along a first axis 221 (e.g., a longitudinal axis). The first portion 220 may include the first aperture 211 and the second aperture 215. The first portion 220 may be configured to attach the hook attachment plate 200 to the bone and / or the second bone fixation plate that is atached to the bone. The first portion 220 may be configured to be secured to the second bone fixation plate. The first portion 220 may be located proximate to an opening (e.g., such as opening 152 of the second bone fixation plate 150 shown in FIG. 1A) on the second bone fixation plate, for example, to align the first aperture 211 with the opening. The first portion 220 (e.g., part of the bottom surface 114) may rest on the portion of the second bone fixation plate proximate to the opening, for example, to keep the hook atachment plate 200 from moving (e.g., rocking) when biomechanical tension is applied.

[0073] The bone screw holes 217 may be configured to receive respective fasteners (e.g., bone screws such as fastener 129 shown in FIG. 1 A) that are configured to be secured to thebone (e.g., proximate to the distal end of the bone). The bone screw holes 217 may be angled back toward the bone such that the fasteners can securely hold the bone fragment to the bone.

[0074] The first portion 220 (e.g., the first aperture 215) may be configured to receive a fastener (e.g., such as fastener 127 shown in FIG. 1 A) for securing the hook attachment plate 200 to the second bone fixation plate. For example, the fastener may be received by the second aperture 215 of the hook attachment plate 200 and a machine treaded hole on the second bone fixation plate. The second aperture 215 may be slotted. For example, the second aperture 215 may extend along the first axis 221 defined by the first portion 220. The second aperture 215 may allow proximal-distal adjustment of the third portion 230, for example, to accommodate varying anatomy and / or allow for fragment reduction.

[0075] The first aperture 211 may be located on the first portion 220. The first portion 220 (e.g., the second aperture 215) may be configured to receive a fastener (e.g., such as fastener 125 shown in FIG. 1 A) that is configured to be secured to the bone (e.g., through the second bone fixation plate). The second aperture 215 and the bone screw holes 217 may enable positioning of the third portion 230 proximate to different areas on the distal end of the bone. The first aperture 211 (e.g., a k-wire hole) may be configured to receive k-wire or a hook instrument, for example, during fixation. For example, the first aperture 211 may permit insertion of a K-wire (not shown) therethrough to aid in positioning the hook attachment plate 200.

[0076] The hook attachment plate 200 may include hooks 234 (e.g., a hook portion) that extend from a distal edge 222 of the asymmetric plate body 210. The third portion 230 may extend along a third axis 225 that is disposed a fourth angle A4 from the second axis 223. The third portion 230 may define the distal edge 222 of the asymmetric plate body 210. The third portion 230 may include the bone screw holes 117. The third portion 230 (e.g., the hooks 234) may be configured to engage with an articular fragment (e.g., such as a volar lip fragment). For example, the hooks 234 may define a hook end 235 that is configured to engage the bone fragment. The hook end 235 may taper to a point such that the hook end 235 is a pointed end of the respective on of the hooks 234. The hooks 234 may include a first hook that extends from the distal edge 222 proximate to a first side 226 of the asymmetric plate body 210 and a second hook that extends from the distal edge 222 proximate to a second side 228 of the asymmetric plate body 210.

[0077] The hook attachment plate 200 (e.g., the asymmetric plate body 210) may define a cross-sectional shape that matches the distal end of the bone. The hooks 234 may continue the cross-sectional shape of the hook attachment plate 200 (e.g., the asymmetric plate body 210). Alternatively, the hooks 234 may define an alternate cross-sectional shape (e.g., a different radius, angle, etc. than the asymmetric plate body 210). Additionally or alternatively, the hooks 234 may be straight. For example, the hooks 234 may extend (e.g., from the distal edge 222) at an angle toward the bone (e.g., bone fragment).

[0078] The third portion 230 may be offset from the first portion 220 in a transverse direction that is substantially perpendicular to the longitudinal direction. The third portion 230 may define a first side 226 (e.g., an ulnar side) and an opposed second side 228 (e.g., a radial side). The second side 228 of the third portion 230 may be offset from a radial side 236 of the first portion 220 by a range of 40 to 80 percent (e.g., such as 60 percent) of a distance D2 between an ulnar side 234 of the first portion 220 and the radial side 236 of the first portion 220. The second portion 232 may be an angled section of the hook attachment plate 200. The hook attachment plate 200 (e.g., the second portion 232) may define a lateral jog to place the hooks 234 ulnarly relative to the attachment screw (e.g., such as the attachment screw 127 shown in FIG. 1A) while keeping the direction of the second aperture 215 in line with the shaft of the bone. The second portion 232 may be configured to extend from the first portion 220, for example, to enable the hooks 234 to engage the bone fragment that is proximate to the distal end of the bone.

[0079] The hook attachment plate 200 (e.g., the second portion 232) may provide an offset (e.g., an angled or parallel offset) for the hooks 234 from the first portion 220. For example, the second portion 232 may offset the hooks 234 from the first portion 220 relative to the diaphysis of the bone. The second portion 232 may be configured to enable the hooks 234 to anchor a bone fragment (e.g., such as the bone fragment 107 shown in FIGs. 1A and IB) that is spaced away from a center portion of the distal end of the bone. For example, the offset may be configured to enable the hooks 234 to engage the bone fragment proximate to the distal end of the bone. The amount of the offset provided by the second portion 232 may vary depending on the amount of offset required. As such, the hook attachment plate 200 may be made with different offsets and / or angles (e.g., such as angle A2) to accommodate desired outcomes.

[0080] The hook attachment plate 200 (e.g., the second portion 232) may define the angle A2 that is measured between the second side 228 (e.g., a third axis 225 extending along the second side 228) of the third portion 230 and a second axis 223 extending through a midpoint between the bone screw holes 217 and an upper (e.g., distal) center of the second aperture 215. The third portion 230 (e.g., the angled section 232) may define the bone screw holes 217 that are configured to receive the fastener that secures the bone fragment to the second bone fixation plate. For example, the bone screw holes 217 may be located on the third portion 230 of the asymmetric plate body 210. It should be appreciated that although the second portion 232 of the asymmetric plate body 210 is shown as angled, the second portion 232 may be curved to provide the offset for the hooks 234.

[0081] The first portion 220 may define the first axis 221. The first axis 221 may extend through a midpoint of the first portion 220. The second portion 232 may define a second axis 223. The second axis 223 may extend through a midpoint of the second portion 232. The second axis 223 may extend at the angle A3 relative to the first axis 221. For example, the second portion 232 may extend along the second axis 223 that is disposed at the angle A3 from the first axis 221. The angle A3 may be in a range of 10 to 30 degrees. The second aperture 215 may be slotted (e.g., elongated) along a direction defined by the first axis 221. When the second aperture 215 is slotted, the second aperture 215 may enable proximal- distal adjustment of the hooks 234, for example, to accommodate varying anatomy and allow for fragment reduction. The proximal-distal adjustment of the hooks 234 may be along the first axis 221.

[0082] The first portion 220 may define a lower surface 224 that is convex. The third portion 230 (e.g., and / or the second portion 232) may define a lower surface 236 that is concave. The bottom surface 214 of the hook attachment plate 200 (e.g., the asymmetric plate body 210) may include the lower surface 224 and the lower surface 236. For example, the lower surface 224 of the attachment portion 220 and the lower surface 236 of the third portion 230 may be configured to match the contours of the bone (e.g., and the second bone fixation plate) such that the first portion 220 and the third portion 230 abut the second bone fixation plate and / or engage (e.g., abut or penetrate) the bone when secured to the bone and / or the second bone fixation plate.

[0083] FIGs. 3A-3G depict example bone fixation plates (e.g., TCPs) 300A, 300B, 300C with an articular fragment hook extension 350A, 350B, 350C. The TCPs 300 A, 300B, 300Cmay be configured to be secured to a bone 305. The TCPs 300A, 300B, 300C may be a bone fixation plate that is configured to fixate a distal radius fracture and engage a bone fragment 307 that is proximate to a distal end 306 of the bone 305. The TCPs 300A, 300B, 300C may be designed to sit below a watershed line of the bone 305. FIG. 3 A is a perspective view of the example TCP 300A attached to the bone 305 (e.g., a left radius bone). FIG. 3B is a front view of the example TCP 300C. FIG. 3C is a side view of the example TCP 300C. FIG. 3D is a front view of the example TCP 300B shown attached to the bone 305 (e.g., a right radius bone).

[0084] The TCP 300A may define a plate body 340A and the articular fragment hook extension 350A. The TCP 300A (e.g., the articular fragment hook extension 350A) may be configured to securely hold distal fractures (e.g., such as volar lip fractures) while avoiding the articular space. For example, the TCP 300A may enable fixation of a distal radius fracture with an instable volar lip component.

[0085] The plate body 340A may define a top surface 332 and a bottom surface 333. The bottom surface 333 may be referred to as a bone abutment surface. The bottom surface 333 may be configured to abut the bone 305. The bottom surface 333 may define a contour that corresponds to a shape of the bone 305. The plate body 340A may define a substantially triangular outer profile when viewed from above a surface of the TCP 300A (e.g., the plate body 340A) which, when in a desired location on a target bone, faces away from the bone 305. As would be understood by those skilled in the art, when viewed from a side thereof, the plate body 340A may define a curve (e.g., curved cross-section) corresponding to a shape of the portion of bone 305 to which it is to be secured. For example, the plate body 340A may define a first portion 321 A that is substantially planar and a second portion 322A that is curved. The first portion 321 A may be configured for placement on a long portion of the bone 305. The first portion 321 A may extend along a longitudinal direction defined by a longitudinal axis 304.

[0086] The second portion 322A may be disposed at an angle to the first portion 321A, for example, for placement on a head of the bone 305. The second portion 321 A may define a distal edge 324A that is distal from the first portion 321 A. The second portion 322A may be angled relative to the first portion 321 A, for example, a plane defined by an upper surface of the second portion 322A may be angled relative to a plane defined by an upper surface of the first portion321 A. The second portion 322A may extend along a second axis 307. The second axis 303 may be disposed an angle A3 from the longitudinal axis 304. The angle A3 may be in the range of 5 to 40 degrees. The angle A3 may be configured such that the second portion 322A corresponds to the shape of the head of the bone 305.

[0087] The second portion 322A may define a first plurality of bone screw holes 325A. For example, the first plurality of bone screw holes 325A may be arranged in the second portion 322A. Each of the first plurality of bone screw holes 325 A may extend from the top surface 332A to the bottom surface 333A. The first portion 321 A may define a second plurality of bone screw holes 327A that extend from the top surface 332A to the bottom surface 333A. The opening 308A may extend through at least a portion of the first portion 321 A and at least a portion of the second portion 322A. The opening 308 A may have a profile that substantially matches an outer profile of the plate body 340A. The opening 308A may be configured to enable viewing of a fracture in the bone 305, for example, when the TCP 300A is inserted into abutment with the bone 305. The opening 308 may be configured to permit viewing of a bone fracture line therethrough to aid in positioning of the TCP 300A over a target portion of the bone 305 as would be understood by those skilled in the art. The TCP 300A (e.g., the second portion 322A) may define a width defined by a distance D3 between a first side 317A of the second portion 322A and a second side 318A of the second portion 322A. The distance D3 may represent a maximum width of the TCP 300A (e.g., the second portion 322A).

[0088] The TCP 300A may be formed, for example, of titanium, a titanium alloy, a stainless steel, or PEEK.

[0089] The first plurality of bone screw holes 325A and the second plurality of bone screw holes 327A may define substantially the same diameter (e.g., 3.5 mm.) or, in another embodiment, may define different diameters to permit the insertion of different sized bone screws therethrough.

[0090] Each of the first plurality of bone screw holes 325A and / or the second plurality of bone screw holes 327A may define an axis angled to guide a bone fixation element (e.g., such as a bone screw) therethrough into the bone 305 along a desired axis which preferably does not intersect within the bone 305 with any of the other screw hole axes. In addition, each of the bonescrew holes 325 A, 327A may be configured so that a bone screw (e.g., such as bone screws 335) inserted therethrough extends to an extremity of the bone 305 without interfering with any of the other bone. For example, one or more of the bone screw holes 325A (e.g., adjacent to the right and left lateral walls of the plate body 340 A) may be angled so that bone screws (e.g., such as bone screws 335) inserted therethrough extend outward toward the respective right and left lateral edges of the bone 305. Each of the first plurality of bone screw holes 325A and / or the second plurality of bone screw holes 327A may define internal threading configured to permit locking, screwable insertion of the heads of the bone screws therein.

[0091] The TCP 300A may be attached to the bone 305 using a guide block 310. The guide block 310 may be the same guide block used to attach other TCPs (e.g., such as the TCP 150 shown in FIGs. 1A-1B). The guide block 310 may be configured to provide axes for bone screws to be inserted into the respective holes 325A in the correct respective angles relative to the bone 305. The TCP 300A (e.g., the second portion 322A) may include an attachment hole 329 that is configured to receive a fastener to attach the guide block 310 to the TCP 300A. Additionally or alternatively, the attachment hole 329 may be used to secure another bone fixation plate to the TCP 300A.

[0092] Accordingly, the TCP 300A finds particular utility in bone fractures resulting in two or more bone fragments, as will be described in greater detail with respect to the exemplary method of the present invention. The angles of the screw holes 325A may also be affected by a contour of the TCP 300 A. Specifically, as shown in FIG. 3A, the TCP 300A (e.g., the body 340A) may be contoured so that the bottom surface 333 is seated against the bone 305 in an operative configuration. The TCP 300A (e.g., the body 340A) may define a plurality of Kirschner- wire (“K-wire”) holes 313 adjacent to the screw holes 310. The K-wire holes 313 may be configured to permit the insertion of a K-wire (not shown) therethrough to aid in positioning the TCP 300A over the target portion of the bone 305, as those skilled in the art will understand.

[0093] The TCP 300A (e.g., the plate body 340A) may define one or more threaded locking holes 324 extending therethrough. The locking holes 324 may be variable angle or fixed angle holes. The locking holes 324 may be configured so that bone screws 335 inserted therethroughextend substantially perpendicular to a plane of the plate body 340A. The plate body 340A may define a combination hole 326 having a first substantially obround compression hole portion 328 and a second substantially circular threaded portion 330. The hole portion 328 may be slotted, for example, to enable proximal-distal adjustment of the articular fragment hook extension 350A, for example, to accommodate varying anatomy and allow for fragment reduction. An axis of the combination hole 326 may extend substantially perpendicularly through the plate body 340A. As those skilled in the art will understand, the combination hole portion 328 may be altered to permit insertion of a bone screw 335 therethrough at any desired angle relative to a plane of the plate body 340 A. Specifically, the combination hole portion 328 may include a substantially rounded tapered portion 334 extending into the plate body 340A from a first surface 332 by a predetermined distance.

[0094] The fragment hook extension 350A may be configured to secure a fracture (e.g., such as the bone fragment 307) on a distal portion 306 of the bone 305. The fragment hook extension 350A may be a radial extension from the plate body 340A. For example, the articular fragment hook extension 350A may define a plate portion 352A and one or more hooks 355A extending from the plate portion 352A. For example, the hooks 355A may extend beyond the plate body 340 A. Each of the one or more hooks 355A may be configured to engage the distal portion 306 (e.g., the bone fragment 307) of the bone 305. The fragment hook extension 350A may extend proximate to one of the first plurality of bone screw holes 325A in the first row. For example, the fragment hook extension 350A (e.g., the plate portion 352A) may extend from the distal edge 324A of the plate body 340A (e.g., the second portion 322A). The fragment hook extension 350A (e.g., the plate portion 352A) may be rounded such that the plate 352A defines a cross- sectional shape that matches the distal portion 306 of the bone 305. The one or more hooks 355A may continue the cross-sectional shape of the plate 352A. Alternatively, the one or more hooks 355A may define an alternate cross-sectional shape (e.g., a different radius than the plate 352A). Additionally or alternatively, the one or more hooks 355A may be straight. For example, the one or more hooks 355A may extend (e.g., from the plate 352A) at an angle toward the bone 305 (e.g., bone fragment 307).

[0095] The fragment hook extension 350A may be monolithic with the plate body 340A. The fragment hook extension 350A (e.g., the one or more hooks 355A) may comprise threehooks 355A. The one or more hooks 355 A may be evenly spaced, for example, as shown. It should be appreciated that the one or more hooks 355A may also be arranged such that they are not evenly spaced. Each of the one or more hooks 355 A may define a pointed end 357A. The pointed end 357A may define a portion of the respective one of the hooks 355 A that tapers to a point. The one or more hooks 355A may be oriented to restrict movement of a bone fragment (e.g., such as the bone fragment 307) associated with the fracture on the distal portion 306 of the bone 305. The fragment hook extension 350A may extend from a side portion 319A of the distal edge 324A of the plate body 340A. The fragment hook extension 350A extends beyond the distal edge 324A of the plate body 340A. The side portion 319A may be offset from a center of the plate body 340A in a transverse direction that is perpendicular to the longitudinal direction. At least one of the one or more hooks 355A may extend beyond the plate body 340A in the transverse direction. For example, a portion of one or more hooks 355A may extend beyond the first side 317A of the second portion 322A.

[0096] FIG. 3F is a top view of another example TCP 300B with an articular fragment hook extension 350B. The example TCP 300B may include similar features as the TCP 300A. For example, the TCP 300B may define a plate body 340B that is structured similar to the plate body 340A of the TCP 300A. The TCP 300B (e.g., the plate body 340B) may define a first portion 321B that is substantially planar and a second portion 322B that is disposed at an angle to the first portion 321B. The body 340B may define the same number, more, or less screw holes 325B than the body 340A of the TCP 300A. The second portion 322B may define the screw holes 325B. The opening 308B may extend through a portion of the first portion 321B and a portion of the second portion 322B. The opening 308B of the TCP 300B may be larger than the opening 308 A of the TCP 300A.

[0097] The articular fragment hook extension 350B may be similar (e.g., have a similar structure) to the articular fragment hook extension 350A of the TCP 300 A. The articular fragment hook extension 350B may be a radial extension from the body 340B. For example, the articular fragment hook extension 350B may define a plate 352B with one or more hooks 355B extending from the plate 352B. The articular fragment hook extension 350B may extend proximate to one of the screw holes 325B in the first row. For example, the articular fragment hook extension 350B (e.g., the plate 352B) may extend from a distal edge 324B of the body340B (e.g., the second portion 322B). The plate 352B may be rounded such that the plate 352B defines a cross-sectional shape that matches the distal end 306 of the bone 305. The one or more hooks 355B may continue the cross-sectional shape of the plate 352B. Alternatively, the one or more hooks 355B may define an alternate cross-sectional shape (e.g., a different radius than the plate 352B). The articular fragment hook extension 350B may define a different cross-sectional shape than the articular fragment hook extension 350A. The articular fragment hook extension 350B may be wider than the articular fragment hook extension 350A. The one or more hooks 355B of the articular fragment hook extension 350B may be spaced farther apart than the one or more hooks 355A of the articular fragment hook extension 350A.

[0098] The TCP 300B (e.g., the second portion 322B) may define a width defined by a distance D4 between a first side 317B of the second portion 322B and a second side 318B of the second portion 322B. The distance D4 may represent a maximum width of the TCP 300B (e.g., the second portion 322B). At least one of the one or more hooks 355B may extend beyond the plate body 340B in the transverse direction. For example, a portion of one or more hooks 355B may extend beyond the first side 317B of the second portion 322B.

[0099] FIG. 3G is a top view of another example TCP 300C with an articular fragment hook extension 350C. The example TCP 300C may include similar features as the TCP 300B and / or the TCP 300A. For example, the TCP 300C may define a body 340C that is structured similar to the body 340A of the TCP 300A and / or the body 340B of the TCP 300B. The TCP 300C (e.g., the body 340C) may define a first portion 321 C that is substantially planar and a second portion 322C that is curved. The body 340C may define the same number, more, or less screw holes 325C than the body 340A of the TCP 300A and / or the body 340B of the TCP 300B. The second portion 322C may define the screw holes 325C. The opening 308C may extend through a portion of the first portion 321 C and a portion of the second portion 322C. The opening 308C of the TCP 300C may be larger than the opening 308A of the TCP 300A and / or the opening 308B of the TCP 300B.

[0100] The articular fragment hook extension 350C may be similar (e.g., have a similar structure) to the articular fragment hook extension 350A of the TCP 300A and / or the articular fragment hook extension 350B of the TCP 300B. The articular fragment hook extension 350Cmay be a radial extension from the body 340C. For example, the articular fragment hook extension 350C may define a rounded plate 352C with one or more hooks 355C extending from the rounded plate 352C. The articular fragment hook extension 350C may extend proximate to one of the screw holes 310 in the first row. For example, the articular fragment hook extension 350C (e.g., the rounded plate 352C) may extend from a distal edge 324C of the body 340C (e.g., the second portion 322C). The rounded plate 352C may define a cross-sectional shape that matches the distal end 306 of the bone 305. The one or more hooks 355C may continue the cross-sectional shape of the rounded plate 352C. Alternatively, the one or more hooks 355C may define an alternate cross-sectional shape (e.g., a different radius than the rounded plate 352C). The articular fragment hook extension 350C may define a different cross-sectional shape than the articular fragment hook extension 350A and / or the articular fragment hook extension 350B. The articular fragment hook extension 350C may be wider than the articular fragment hook extension 350A and / or the articular fragment hook extension 350B. The one or more hooks 355C of the articular fragment hook extension 350C may be spaced farther apart than the one or more hooks 355A of the articular fragment hook extension 350A and / or the one or more hooks 355B of the articular fragment hook extension 350B.

[0101] The TCP 300C (e.g., the second portion 322C) may define a width defined by a distance D5 between a first side 317C of the second portion 322C and a second side 318C of the second portion 322C. The distance D5 may represent a maximum width of the TCP 300C (e.g., the second portion 322C). At least one of the one or more hooks 355C may extend beyond the plate body 340C in the transverse direction. For example, a portion of one or more hooks 355C may extend beyond the first side 317C of the second portion 322C.

[0102] FIGs. 4A-4G depict example articular fragment hook plates 400A, 400B. The articular fragment hook plates 400A, 400B may be configured to be secured between a TCP 450 that is attached to a bone 405 (e.g., such as a radius bone) and the bone 405. The articular fragment hook plates 400A, 400B may be a bone fixation plate that is configured to engage a bone fragment 407 that is proximate to a distal end 406 of the bone 405. For example, the articular fragment hook plates 400A, 400B may be configured to be secured between a second bone fixation plate (e.g., such as the TCP 450) and a distal portion (e.g., the distal end 406) of the intermediate column of the distal radius (e.g., the bone 405) to which the second bonefixation plate is attached. FIG. 4A is a perspective view of the articular fragment hook plate 400A used with the TCP 450 and shown attached to the bone 405. FIG. 4B is a top view of the articular fragment hook plate 400B used with the TCP 450 and shown attached to the bone 405. FIG. 4C is a perspective view of the articular fragment hook plate 400B. FIG. 4D is a perspective view of the articular fragment hook plate 400A. FIG. 4E is a top view of the articular fragment hook plate 400B. FIG. 4F is a front view of the articular fragment hook plate 400B. FIG. 4G is a side view of the articular fragment hook plate 400B. The articular fragment hook plates 400A, 400B may be formed, for example, of titanium, a titanium alloy, a stainless steel, or polyehteretherketone (“PEEK”). It should be appreciated that although FIGs. 4A and 4B depict the articular fragment hook plates 400 A, 400B being used with the TCP 450, the articular fragment hook plates 400A, 400B may be used without the TCP 450 or any other plate.

[0103] The articular fragment hook plate 400A may define a plate body 440 A. The articular fragment hook plate 400B may define a plate body 440B. The plate body 440 A, 440B may be configured to be secured between a second bone fixation plate 450 (e.g., such as the TCP 150 shown in FIGS. 1 A and IB) and a bone 405 to which the second bone fixation plate 450 is attached. The articular fragment hook plate 400A, 400B (e.g, the plate body 440A, 440B) may define a plurality of first apertures 410 and one or more second apertures 420 through the plate body 440A, 440B. Each of the plurality of first apertures 410 may be configured to receive one or more fasteners 415 that attach the articular fragment hook plate 400 A, 400B to the bone 405. The one or more second apertures 420 may be defined between a group (e.g, set) of (e.g., four) first apertures 410. For example, the plurality of first apertures 410 may be arranged in sets of four first apertures 410. Each set of four first apertures 410 may be arranged in a rectangular pattern. Each of the one or more second apertures 420 may define a concave section arranged between each respective pair of first apertures 410 and a convex section that corresponds to an outer edge of each respective first aperture 410.

[0104] The articular fragment hook plate 400A, 400B may define a hook portion 430 A, 430B configured to extend from the plate body 440A, 440B. The hook portion 430A, 430B may define one or more hooks 434. The one or more hooks 434 may extend from the plate body 440 A, 440B. For example, two hooks 434 may extend from each set of four first apertures 410. The one or more hooks 434 may be configured to anchor a bone fragment that is spaced awayfrom a center portion of a distal end 406 of the bone 405. Additionally or alternatively, the one or more hooks 434 may be straight. For example, the one or more hooks 434 may extend (e.g., from the plate body 440A) at an angle toward the bone 405 (e.g., bone fragment).

[0105] Each of the one or more hooks 434 may be aligned with a respective one of the plurality of apertures 410. For example, each of the one or more hooks 434 may extend from the plate body 440 A proximate to an aperture of the plurality of apertures 410. Each of the one or more hooks 434 may define a hook end 436 that is configured to engage the bone fragment. The hook end 436 may be a tapered section of the respective hook 434. For example, the hook end 436 may define a point at a distal portion of the respective hook 434.

[0106] FIGs. 5A-5C depict example volar ulnar corner plates 500A, 500B. FIG. 5A is a side view of an example volar ulnar corner plate 500A shown attached to a bone 505 (e.g., such as a radius bone). FIG. 5B is a perspective view of the example volar ulnar corner plate 500A. The volar ulnar corner plate 500A may be configured to be secured to a bone 505. The volar ulnar corner plate 500A may be a bone fixation plate that is configured to fixate a distal radius fracture and engage a bone fragment 507 that is proximate to a distal end 506 of the bone 505. The volar ulnar corner plate 500A may be configured to securely hold distal fractures (e.g., such as volar lip fractures) while avoiding the articular space. For example, the volar ulnar corner plate 500A may enable fixation of a distal radius fracture with an instable volar lip component.

[0107] The volar ulnar corner plate 500A may define a body 510A (e.g., a plate body). The body 510A may define a top surface 514A and a bottom surface 516A. The bottom surface 516A may be referred to as a bone abutment surface. For example, the bottom surface 516A may define a contour that corresponds to the shape of the bone 505. As would be understood by those skilled in the art, when viewed from a side thereof, the body 510A may define a curve (e.g., curved cross-section) corresponding to a shape of the portion of bone 505 to which it is to be secured. For example, the body 510A may define a first portion 520A that is substantially planar, a second portion 525A that is disposed at an angle to the first portion 520A, and a third portion 540A that is substantially planar. The second portion 525A may extend between the first portion 520A and the third portion 540A. A hook portion 540A of the volar ulnar corner plate 500A may extend from the third portion 540A. The third portion 540A may define an end 546Athat is distal from the first portion 520A. The third portion 540A may define one or more first bone screw holes 517. The one or more first bone screw holes 517 may include two bone screw holes 517 that are arranged side by side on the third portion 540A such that each of the one or more first bone screw holes 517 is the same distance D6 in the longitudinal direction from the first portion 520 A.

[0108] The first portion 520A may extend along a longitudinal direction that is defined by a longitudinal axis 511 A. The longitudinal axis 511 A may extend along a center of the first portion 520A. The second portion 525A may be disposed at an angle (e.g., such as the angle A6 shown in FIG. 5C), for example, in a transverse direction that is perpendicular to the longitudinal direction, from the first portion 520A (e.g., the longitudinal axis 511 A). The transverse direction may be defined along a width of the first portion 520A (e.g., between a first side 522A and a second side 523A of the first portion 520 A). The second portion 525A may extend along a second axis (e.g., such as the second axis 515B shown in FIG. 5C). The second axis may extend along a center of the second portion 525 A. The third portion 540A may extend along a third axis (e.g., such as the third axis 521B shown in FIG. 5C). The third axis may extend along a center of the third portion 540A. The third axis may be substantially parallel to the longitudinal axis 511A.

[0109] The second portion 525A and the third portion 540A may be disposed at an angle A5 (e.g., in an axial direction that is perpendicular to the longitudinal direction and the transverse direction) from the first portion 520A. The angle A5 may be in the range of 5 to 40 degrees. For example, the second portion 525A and the third portion 540A may extend along a second axis 512A. The second axis 512A may be offset (e.g., in a plane defined by the longitudinal direction and the transverse direction) from the longitudinal axis 511 A by the angle A4.

[0110] The volar ulnar corner plate 500A may be formed, for example, of titanium, a titanium alloy, a stainless steel, or PEEK. The volar ulnar corner plate 500A (e.g., the body 510A) may include a plurality of second bone screw holes 535 extending therethrough, the plurality of second bone screw holes 535 may define substantially the same diameter (e.g., 3.5 mm.) or, in another embodiment, may define different diameters to permit the insertion of different sized bone screws therethrough.

[0111] Each of the plurality of second bone screw holes 535 may define an axis angled to guide a bone fixation element (e.g., such as a bone screw 524) therethrough into the bone 505 along a desired axis which preferably does not intersect within the bone 505 with any of the other screw hole axes. In addition, each of the second bone screw holes 535 may be configured so that a bone screw 524 inserted therethrough at a nominal trajectory extends to an extremity of the bone 505 without interfering with any of the other bone screws 524 and without extending through an opposing cortical surface of the bone 505. One or more of the plurality of second bone screw holes 535 may define internal threading configured to permit locking, screwable insertion of the heads of the bone screws 524 therein.

[0112] The volar ulnar corner plate 500A (e.g., the body 510A) may define a plurality of Kirschner- wire (“K-wire”) holes 513. The K-wire holes 513 may be configured to permit the insertion of a K-wire (not shown) therethrough to reduce the fragment 507 and / or to aid in positioning the volar ulnar corner plate 500A over the target portion of the bone 505, as those skilled in the art will understand.

[0113] The volar ulnar corner plate 500A (e.g., the body 510A) may define a combination hole 526 having a first substantially obround compression hole portion 528 and a second substantially circular threaded portion 530. The hole portion 528 may be slotted, for example, to enable proximal-distal adjustment of the second portion 540A (e.g., the hook portion 550A), for example, to accommodate varying anatomy and allow for fragment reduction. An axis of the combination hole 526 may extend substantially perpendicularly through the body 510A. As those skilled in the art will understand, the combination hole portion 528 may be altered to permit insertion of a bone screw therethrough at any desired angle relative to a plane of the body 510A.

[0114] The hook portion 550A may be a radial extension from the first portion 520A of the body 510A. For example, the hook portion 550A may extend beyond the body 510A in the longitudinal direction. The hook portion 550A may be configured to engage a distal portion 506 of the bone 505. The hook portion 550A may define one or more first hooks 554 and one or more second hooks 556 extending from the body 510A. The one or more first hooks 554 may extend from the body 510A (e.g., the upper edge 542A of the third portion 540A) in a direction that is substantially parallel to the longitudinal direction (e.g., longitudinal axis 511A) definedthrough a middle of the first portion 520A. The one or more first hooks 554 may extend from the end 546B of the third portion 540B that is distal from the first portion 520B. The one or more first hooks 554 may comprise three hooks. The three hooks may be substantially parallel to one another and / or may be evenly spaced. The one or more second hooks 556 may extend from the body 510A in a transverse direction that is substantially perpendicular to the longitudinal direction (e.g., longitudinal axis 511A). The transverse direction may be defined along a width of the body 510A (e.g., between a first side 522A and a second side 523 A). The one or more second hooks 556 may extend from a side edge 544 A of the third portion 540A that is proximate to the distal edge 542A of the third portion 540A. For example, the one or more second hooks 556 may extend only from one side (e.g., side edge 544 A) of the third portion 540 A.

[0115] The hook portion 550A may extend proximate to two of the first bone screw holes 517. The hook portion 550A may define a cross-sectional shape that matches the distal end 506 of the bone 505. The one or more first hooks 554 and / or the one or more second hooks 556 may continue the cross-sectional shape of the third portion 540A. Alternatively, the one or more first hooks 554 and / or the one or more second hooks 556 may define an alternate cross-sectional shape (e.g., a different radius than the third portion 540A). Additionally or alternatively, the one or more first hooks 554 and / or the one or more second hooks 556 may be straight. For example, the one or more first hooks 554 and / or the one or more second hooks 556 may extend (e.g., from the distal edge 542A of the third portion 540A) at an angle toward the bone 505 (e.g., bone fragment 507).

[0116] FIG. 5C is a top view of the example volar ulnar corner plate 500B. The volar ulnar corner plate 500B may be similar to the volar ulnar corner plate 500A shown in FIGs. 5A and 5B. The body 510B (e.g., plate body) of the volar ulnar corner plate 500B may have less bone screw holes 535 than the volar ulnar corner plate 500A. The hook portion 550B of the volar ulnar corner plate 500B may have the same number of hooks 554, 556 as the volar ulnar corner plate 500A. The volar ulnar corner plate 500B may be configured to be secured to a bone 505. The volar ulnar corner plate 500B may be a bone fixation plate that is configured to fixate a distal radius fracture and engage a bone fragment that is proximate to a distal end 506 of the bone 505. The volar ulnar corner plate 500B may be configured to securely hold distal fractures(e.g, such as volar lip fractures) while avoiding the articular space. For example, the volar ulnar corner plate 500B may enable fixation of a distal radius fracture with an instable volar lip component.

[0117] The volar ulnar corner plate 500B may define a body 51 OB (e.g, a plate body). The body 51 OB may define a top surface 514B and a bottom surface (e.g., such as the bottom surface 516A). The bottom surface may be referred to as a bone abutment surface. For example, the bottom surface may define a contour that corresponds to the shape of the bone 505. As would be understood by those skilled in the art, when viewed from a side thereof, the body 510B may define a curve (e.g., curved cross-section) corresponding to a shape of the portion of bone 505 to which it is to be secured. For example, the body 510B may define a first portion 520B that is substantially planar, a second portion 525B that is disposed at an angle to the first portion 520B, and a third portion 540B that is substantially planar. The second portion may extend between the first portion 520B and the third portion 540B. The hook portion 540B of the volar ulnar corner plate 500B may extend from the third portion 540B. The third portion 540B may define a first plurality of screw holes 517. The one or more first bone screw holes 517 may include two bone screw holes 517 that are arranged side by side on the third portion 540B such that each of the first plurality of bone screw holes 517 is the same distance D6 in the longitudinal direction from the first portion 520B.

[0118] The first portion 520B may extend along a longitudinal direction that is defined by a longitudinal axis 51 IB. The longitudinal axis 51 IB may extend along a center of the first portion 520B.

[0119] The third portion 540B may be offset from the first portion 520B in a transverse direction that is substantially perpendicular to the longitudinal direction. The third portion 540B may define a first side 544B and an opposed second side 543B. The second side 543B of the third portion 540B may be offset from a first side 523B of the first portion 520B by a range of 40 to 80 percent (e.g., such as 60 percent) of a distance D7 between a second side 522B of the first portion 520B and the first side 523B of the first portion 520B. The second portion 525B may be an angled section of the volar ulnar corner plate 500B. The volar ulnar corner plate 500B (e.g., the second portion 525B) may define a lateral jog to place the hooks 554, 556 laterally relative tothe attachment screw (e.g., such as the attachment screw 127 shown in FIG. 1A) while keeping the direction of the second aperture 528 in line with the shaft of the bone. The second portion 525B may be configured to extend from the first portion 520B, for example, to enable the hooks 554, 556 to engage the bone fragment that is proximate to the distal end of the bone.

[0120] The volar ulnar corner plate 500B (e.g., the second portion 525B) may provide an offset (e.g., an angled or parallel offset) for the hooks 554, 556 from the first portion 520B. For example, the second portion 525B may offset the hooks 554, 556 from the first portion 520B relative to the diaphysis of the bone. The second portion 525B may be configured to enable the hooks 554, 556 to anchor a bone fragment that is spaced away from a center portion of the distal end of the bone. For example, the offset may be configured to enable the hooks 554, 556 to engage the bone fragment proximate to the distal end of the bone. The amount of the offset provided by the second portion 525B may vary depending on the amount of offset required. As such, the volar ulnar corner plate 500B may be made with different offsets and / or angles (e.g., such as angle A4) to accommodate desired outcomes.

[0121] The volar ulnar corner plate 500B (e.g., the second portion 525B) may define the angle A4 that is measured between the second side 543B (e.g., a third axis 509 extending along the second side 543B) of the third portion 540B and a second axis 52 IB extending through a midpoint between the bone screw holes 517 and an upper (e.g., distal) center of the combination hole 526 (e.g., the second substantially circular threaded portion 530). The angle A4 may be in the range of 10 to 50 degrees.

[0122] The volar ulnar corner plate 500B may be formed, for example, of titanium, a titanium alloy, a stainless steel, or PEEK. The volar ulnar corner plate 500B (e.g., the body 510B) may include a plurality of second bone screw holes 535 extending therethrough. For example, each of the plurality of second bone screw holes 535 may extend from the top surface , the plurality of second bone screw holes 535 may define substantially the same diameter (e.g., 3.5 mm.) or, in another embodiment, may define different diameters to permit the insertion of different sized bone screws therethrough.

[0123] Each of the plurality of second bone screw holes 535 may define an axis angled to guide a bone fixation element (e.g., such as a bone screw 524) therethrough into the bone 505along a desired axis which preferably does not intersect within the bone 505 with any of the other screw hole axes. In addition, each of the plurality of second bone screw holes 535 may be configured so that a bone screw 524 inserted therethrough extends to an extremity of the bone 505 without interfering with any of the other bone screws 524 and without extending through an opposing cortical surface of the bone 505. One or more of the plurality of second bone screw holes 535 may define internal threading configured to permit locking, screwable insertion of the heads of the bone screws 524 therein.

[0124] The volar ulnar corner plate 500B (e.g., the body 510B) may define a plurality of Kirschner- wire (“K-wire”) holes 513. The K-wire holes 513 may be configured to permit the insertion of a K-wire (not shown) therethrough to aid in positioning the volar ulnar corner plate 500B over the target portion of the bone 505, as those skilled in the art will understand.

[0125] The volar ulnar corner plate 500B (e.g., the body 510B) may define a combination hole 526 having a first substantially elliptical compression hole portion 528 and a second substantially circular threaded portion 530. The hole portion 528 may be slotted, for example, to enable proximal-distal adjustment of the second portion 540B (e.g., the hook portion 550B), for example, to accommodate varying anatomy and allow for fragment reduction. An axis of the combination hole 526 may extend substantially perpendicularly through the body 510B. As those skilled in the art will understand, the combination hole portion 528 may be altered to permit insertion of a bone screw therethrough at any desired angle relative to a plane of the body 510B.

[0126] The hook portion 550B may be a radial extension from the first portion 520B of the body 510B. For example, the hook portion 550B may extend beyond the body 510B in the longitudinal direction. The hook portion 550B may be configured to engage a distal portion 506 of the bone 505. The hook portion 550B may define one or more first hooks 554 extending from the body 510B. The one or more hooks 554 may extend from the body 510B (e.g., the distal edge 542B of the third portion 540B) in a direction that is substantially parallel to the longitudinal direction (e.g., the longitudinal axis 51 IB) defined through a middle of the first portion 520B. The one or more first hooks 554 may extend from the end 546A of the third portion 540A that is distal from the first portion 520A. The one or more first hooks 554 may comprise three hooks. The three hooks may be substantially parallel to one another and / or maybe evenly spaced. The one or more second hooks 556 may extend from the body 51 OB in a transverse direction that is substantially perpendicular to the longitudinal direction (e.g., the longitudinal axis 51 IB). The transverse direction may be defined along a width of the body 51 OB (e.g., between a first side 522B and a second side 523B). The one or more second hooks 556 may extend from a side edge 544B of the third portion 540B that is proximate to a distal edge 542B of the third portion 540B. For example, the one or more second hooks 556 may extend only from one side (e.g., side edge 544B) of the third portion 540B.

[0127] The hook portion 55 OB may extend proximate to two of the first bone screw holes 517. The hook portion 550B may define a cross-sectional shape that matches the distal end 506 of the bone 505. The one or more first hooks 554 and / or the one or more second hooks 556 may continue the cross-sectional shape of the third portion 540B. Alternatively, the one or more first hooks 554 and / or the one or more second hooks 556 may define an alternate cross-sectional shape (e.g., a different radius than the third portion 540B). Additionally or alternatively, the one or more first hooks 554 and / or the one or more second hooks 556 may be straight. For example, the one or more first hooks 554 and / or the one or more second hooks 556 may extend (e.g., from the distal edge 542B of the third portion 540B) at an angle toward the bone 505 (e.g., bone fragment 507).

[0128] FIGs. 6A-6C depict an example volar radial column plate 600. FIG. 6A is a top perspective view of the example volar radial column plate 600 shown attached to a radius bone next to a volar ulnar corner plate 650 (e.g., such as one of the example volar ulnar corner plates 500 A, 500B, 500C, 500D of FIG. 5A). FIG. 6B is a side view of the example volar radial column plate 600. FIG. 6C is a top view of the example volar radial column plate 600. The volar radial column plate 600 may be used with the volar radial ulnar corner plate 650 such that each of the volar radial column plate 600 and the volar radial ulnar corner plate 650 function as half of a TCP (e.g., such as the TCPs 300 A, 300B, 300C shown in figures 3A-3G), for example, in multi-fragmentary distal radius fracture with a radial and ulnar component. Although shown in FIG. 6A being used with the volar radial ulnar corner plate 650, it should be appreciated that the volar radial column plate 600 may be used alone, for example, in isolated radial styloid fractures. The volar radial column plate 600 may be configured to receive two distal screws (e.g., in a joint hole) which are directed to target a styloid tip of the bone 605 when the variable angle functionof the hole is used. When using this feature, the plate-screw construct will not expose any screw threads protruding from the top surface of the volar radial column plate 600 to reduce risk of soft tissue irritation. The volar radial column plate 600 may be designed to sit below a watershed line of the distal radius.

[0129] The volar radial column plate 600 may define a body 610 having a first portion 620 and a second portion 640. The body 610 may provide an offset (e.g., an angled or parallel offset) for the second portion 640 from the first portion 620. The amount of the offset provided by the body 610 may vary depending on the amount of offset required. As such, the volar radial column plate 600 may be made with different offsets and / or angles A3 to accommodate desired outcomes. The offset of the second portion 640 from the first portion 610 may define the angle A3.

[0130] The first portion 620 may define the first longitudinal axis 621. The first longitudinal axis 621 may extend through a midpoint of the first portion 620. The second portion 640 may define a second longitudinal axis 623. The second longitudinal axis 623 may extend through a midpoint of the second portion 640. The second longitudinal axis 623 may extend at the angle A5 relative to the first longitudinal axis 621. The angle A5 may be in a range of 0 to 30 degrees.

[0131] As would be understood by those skilled in the art, when viewed from a side thereof, the body 610 may define a curve (e.g., curved cross-section) corresponding to a shape of the portion of bone 605 to which it is to be secured. For example, the body 610 may define a first portion 620 that is substantially planar and a second portion 640 that is curved. The second portion 640 may define a first plurality of screw holes 617.

[0132] The volar radial column plate 600 may be formed, for example, of titanium, a titanium alloy, a stainless steel, or PEEK. The volar radial column plate 600 (e.g., the body 610) may include a second plurality of screw holes 635 extending therethrough, the second plurality of screw holes 635 may define substantially the same diameter (e.g., 3.5 mm.) or, in another embodiment, may define different diameters to permit the insertion of different sized bone screws therethrough.

[0133] Each of the second plurality of screw holes 635 may define an axis angled to guide a bone fixation element (e.g., such as a bone screw 624) therethrough into the bone 605 along adesired axis which preferably does not intersect within the bone 605 with any of the other screw hole axes. In addition, each of the screw holes 635 may be configured so that a bone screw 624 inserted therethrough extends to an extremity of the bone 605 without interfering with any of the other bone screws 624 and without extending through an opposing cortical surface of the bone 605. One or more of the second plurality of screw holes 635 may define internal threading configured to permit locking, screwable insertion of the heads of the bone screws 624 therein.

[0134] The volar radial column plate 600 (e.g., the body 610) may define a plurality of Kirschner- wire (“K-wire”) holes 613. The K-wire holes 613 may be configured to permit the insertion of a K-wire (not shown) therethrough to aid in positioning the volar radial column plate 600 over the target portion of the bone 605, as those skilled in the art will understand.

[0135] The volar radial column plate 600 (e.g., the body 610) may define a combination hole 626 having a first substantially elliptical compression hole portion 628 and a second substantially circular threaded portion 630. The combination hole 626 may enable plate positioning by fitting the volar radial column plate 600 with a cortical screw in the dynamic compression unit (DCU) portion. The hole portion 628 may be slotted, for example, to enable proximal-distal adjustment of the second portion 640, for example, to accommodate varying anatomy and allow for fragment reduction. An axis of the combination hole 626 may extend substantially perpendicularly through the body 610. As those skilled in the art will understand, the combination hole portion 628 may be altered to permit insertion of a bone screw therethrough at any desired angle relative to a plane of the body 610.

[0136] FIGs. 7A-7B depict an example bone fixation plate guide block 700. FIG. 7A is a top view of the example bone fixation plate guide block 700 shown mounted over an example TCP 750 (e.g., such as the TCP 150 shown in FIGs. 1A and IB, the TCP 300A shown in FIGs. 3A- 3E, the TCP 300B shown in FIG. 3F, the TCP 300C shown in FIG. 3G, and / or the TCP 450 shown in FIGs. 4A and 4B). FIG. 7B is a side view of the example bone fixation plate guide block 700 shown mounted over the TCP 750. Although FIGs. 7A and 7B depict the bone fixation guide block 700 mounted over the TCP 750, it should be appreciated that the bone fixation plate guide block 700 may be mounted to other bone fixation plates (e.g., such as the articular fragment hook plate 200 shown in FIGs. 2A-2C, the volar ulnar corner plates 500A,500B shown in FIGs. 5A-5C, and / or the volar radial column plate 600 shown in FIGs. 6A-6C). The bone fixation plate guide block 700 may define a body 710 having an upper surface 712 and a lower surface 714. The lower surface 714 may be configured to abut the TCP 750. The bone fixation plate guide block 700 may define a plurality of holes 715 from the upper surface 712 to the lower surface 714.

[0137] The bone fixation plate guide block 700 may be configured to enable attachment of a bone fixation plate (e.g., such as the TCP 750) to a bone. For example, the bone fixation plate guide block 700 may be configured to provide axes for bone screws to be inserted into the respective holes 715 in the correct respective angles relative to the bone. For example, some of the axes defined by the respective holes 715 may be aligned with corresponding holes in the bone fixation plate while other axes defined by respective holes may be misaligned (e.g., purposefully offset) from the corresponding holes in the bone fixation plate. The bone fixation plate guide block 700 may be configured to be secured to the TCP 750 via a securing screw 720. The securing screw 720 may secure the bone fixation plate guide block 700 to the TCP 750 in a correct alignment (e.g., such that the holes 715 are aligned with respective screw holes of the TCP 750).

[0138] List of Enumerated Embodiments (EEs)EEL A bone fixation plate configured to be secured to a bone, the bone fixation plate comprising: a plate body having a top surface and a bottom surface, wherein the bottom surface is a bone abutment surface, the plate body comprising: a first portion that is substantially planar and extends along a longitudinal direction that is defined by a longitudinal axis; a second portion that is substantially planar and extends substantially in the longitudinal direction, wherein the second portion defines a distal edge that is distal from the first portion; and a plurality of bone screw holes arranged in the first portion and the second portion that extend from the top surface to the bottom surface; and a hook portion that extends from the second portion, the hook portion comprising:a plurality of first hooks that extend beyond the plate body substantially in the longitudinal direction, configured to engage a distal portion of a bone to secure a fracture; and a plurality of second hooks that extend beyond the plate body substantially in a transverse direction that is perpendicular to the longitudinal direction wherein the distal edge and the hook portion are offset from the first portion in the transverse direction.EE2. The bone fixation plate of EE1, wherein the plurality of second hooks extend from a side edge of the second portion proximate to the distal edge of the second portion.EE3. The bone fixation plate of EE1, wherein the plurality of second hooks extend only from one side edge of the second portion.EE4. The bone fixation plate of EE1 , wherein two of the plurality of bone screw holes are arranged side by side on the second portion such that they are the same distance in the longitudinal direction from the first portion.EE5. The bone fixation plate of EE1, wherein the plurality of first hooks extend from an end of the second portion that is distal from the first portion.EE6. The bone fixation plate of EE5, wherein the plurality of first hooks comprise three hooks extending from the end of the second portion that is distal from the first portion.EE7. The bone fixation plate of EE6, wherein the three hooks are substantially parallel with one another.EE8. The bone fixation plate of EE1, further comprising a plurality of bone screws configured to be received by the plurality of bone screw holes.EE9. The bone fixation plate of EE1, wherein the plurality of bone screw holes comprises a combination hole that defines an elongated compression hole portion and a substantially circular threaded portion.EE10. The bone fixation plate of EE9, wherein the first portion defines one bone screw hole and the combination hole.EE11. The bone fixation plate of EE10, wherein the combination hole is located on the first portion proximate to the third portion.EE12. The bone fixation plate of EE10, wherein the combination hole is located between the one bone screw hole and the third portion.EE13. The bone fixation plate of EE1, further comprising a third portion between the first portion and the second portion.EE14. The bone fixation plate of EE13, wherein the third portion is disposed at an angle to the first portion.EE15. The bone fixation plate of EE 14, wherein the third portion defines the offset of the distal edge and the hook portion from the first portion in the transverse direction.EE16. The bone fixation plate of EE13, wherein the third portion defines one bone screw hole.EE17. The bone fixation plate of EE1, wherein the second portion defines two bone screw holes.EE18. The bone fixation plate of EE17, wherein the two bone screw holes on the second portion are located proximate to the hook portion.EE19. The bone fixation plate of EE1, wherein the second portion extends along a third axis that is substantially parallel to the longitudinal axis.EE20. The bone fixation plate of EE1, wherein the distal edge and the hook portion are offset from the first portion in the transverse direction by a distance in the range of 1 to 5mm.EE21. A first bone fixation plate comprising: an asymmetric plate body having a top surface and a bottom surface, the asymmetric plate body configured to be secured to a second bone fixation plate that is attached to a bone, the asymmetric plate body comprising: a first portion extending along a longitudinal axis that defines a longitudinal direction, the first portion comprising a first bone screw hole; a second portion that is offset from the first portion in a transverse direction that is substantially perpendicular to the longitudinal direction such that a radial side of the second portion is offset from a radial side of the first portion by a range of 40 to 80 percent of a distance between an ulnar side of the first portion and the radial side of the first portion, the second portion defining a distal edge of the plate body, the second portion comprising a second bone screw hole proximate to the distal edge of the plate body; a plurality of hooks extending from the distal edge of the plate body, the plurality of hooks configured to engage a bone fragment that is proximate to a distal end of the bone; and a first aperture extending through the plate body, the aperture configured to receive a fastener to secure the first bone fixation plate to the second bone fixation plate and enable proximal-distal adjustment of the plurality of hooks with respect to the bone.EE22. The first bone fixation plate of EE21, wherein each of the plurality of hooks defines a hook end that is configured to engage the bone fragment.EE23. The first bone fixation plate of EE22, wherein the hook end tapers to a point such that the hook end is a pointed end.EE24. The first bone fixation plate of EE21, wherein the plurality of hooks comprises a first hook that extends from the distal edge of the plate body proximate to the radial side of the second portion and a second hook that extends from the distal edge of the plate body proximate to an ulnar side of the second portion.EE25. The first bone fixation plate of EE21, wherein the first bone screw hole is offset from a center of the first portion defined by the longitudinal axis in the transverse direction.EE26. The first bone fixation plate of EE25, wherein the first bone screw hole is configured to allow a bone screw to extend through the first bone screw hole, through a viewing hole opening in the second bone fixation plate, and into the bone.EE27. The first bone fixation plate of EE21, wherein the proximal-distal adjustment of the hook portion is along the longitudinal axis.EE28. The first bone fixation plate of EE21, further comprising a third portion between the first portion and the second portion, the third portion disposed at an angle to the first portion wherein the third portion is configured to enable the plurality of hooks to anchor the bone fragment that is spaced away from a center portion of the distal end of the bone.EE29. The first bone fixation plate of EE28, wherein the third portion enables the offset of the second portion in the transverse direction.EE30. The first bone fixation plate of EE28, wherein the angle is in a range of 10 to 30 degrees.EE31. The first bone fixation plate of EE28, wherein the third portion is configured to enable the one or more hooks to engage the bone fragment proximate to the distal end of the bone.EE32. The first bone fixation plate of EE28, wherein the second portion and the third portion define a concave portion of the bottom surface.EE33. The first bone fixation plate of EE31, wherein the first aperture is slotted along a direction defined by the longitudinal axis.EE34. The first bone fixation plate of EE31, wherein the first portion defines a convex portion of the bottom surface.EE35. The first bone fixation plate of EE31, wherein the first portion comprises a second aperture.EE36. The first bone fixation plate of EE35, wherein the second aperture is a k-wire hole.EE37. The first bone fixation plate of EE31, wherein the radial side of the second portion is offset from a radial side of the first portion by 60 percent of the distance between the ulnar side of the first portion and the radial side of the first portion.EE38. The first bone fixation plate of EE31, wherein the first aperture is configured to prevent loosening of a fastener received therein.EE39. The first bone fixation plate of EE38, wherein the first portion comprises a pattern of repeating peaks and valleys that surround the first aperture.EE40. A bone fixation system comprising: a first bone fixation plate attached to a bone, the first bone fixation plate defining a plurality of first bone screw holes and a plate attachment hole; a second bone fixation plate comprising: an asymmetric plate body having a top surface and a bottom surface, the asymmetric plate body configured to be secured to a second bone fixation plate that is attached to a bone, the asymmetric plate body comprising:a first portion extending along a longitudinal axis that defines a longitudinal direction, the first portion comprising a second bone screw hole; and a second portion that is offset from the first portion in a transverse direction that is substantially perpendicular to the longitudinal direction such that a radial side of the second portion is offset from a radial side of the first portion by a range of 40 to 80 percent of a distance between an ulnar side of the first portion and the radial side of the first portion, the second portion defining a distal edge of the plate body, the second portion comprising a third bone screw hole proximate to the distal edge of the plate body; a plurality of hooks extending from the distal edge of the plate body, the plurality of hooks configured to engage a bone fragment that is proximate to a distal end of the bone; and a first aperture extending through the plate body, the aperture configured to receive a fastener that is received by the plate attachment hole to secure the second bone fixation plate to the first fixation plate and enable proximal-distal adjustment of the hook portion with respect to the bone.EE41. The bone fixation system of EE40, further comprising a plurality of bone screws configured to be received by the first bone fixation plate or the second bone fixation plate.EE42. A first bone fixation plate comprising: a plate body configured to be secured between a second bone fixation plate and a distal portion of a bone to which the second bone fixation plate is attached; a plurality of first apertures through the plate body that are configured to receive one or more fasteners that attach the first bone fixation plate to the bone, the plurality of first apertures arranged in sets of four first apertures; one or more second apertures through the plate body between each set of four first apertures, the one or more second apertures and a hook portion configured to extend from the plate body, the hook portion comprising two hooks extending from each set of four first apertures that are configuredto anchor a bone fragment that is spaced away from a center portion of a distal end of the bone.EE43. The first bone fixation plate of EE42, wherein the distal portion of the bone is a distal portion of an intermediate column of a distal radius.EE44. The first bone fixation plate of EE42, wherein each of the one or more second apertures comprises: a concave section arranged between each respective pair of the first apertures; and a convex section that corresponds to an outer edge of each respective first aperture.EE45. The first bone fixation plate of EE42, wherein each set of four first apertures are arranged in a rectangular pattern.EE46. The first bone fixation plate of EE42, wherein each of the one or more hooks defines a hook end that is configured to engage the bone fragment.EE47. A bone fixation system comprising: a first bone fixation plate comprising: a plate body; a plurality of first apertures through the plate body that are configured to receive one or more fasteners that attach the first bone fixation plate to the bone, the plurality of first apertures arranged in sets of four first apertures; one or more second apertures through the plate body between each set of four first apertures, the one or more second apertures; a hook portion configured to extend from the plate body, the hook portion comprising two hooks extending from each set of four first apertures that are configured to anchor a bone fragment that is spaced away from a center portion of a distal end of the bone; and the second bone fixation plate comprising:a plate body having a top surface and a bottom surface, wherein the bottom surface is a bone abutment surface, the plate body comprising: a first portion that is substantially planar for placement on a long portion of the bone; a second portion that is disposed at an angle to the first portion for placement on a head of the bone, wherein the second portion defines a distal edge that is distal from the first portion; a first plurality of bone screw holes arranged in the second portion, wherein each of the first plurality of bone screw holes extends from the top surface to the bottom surface; and a second plurality of bone screw holes arranged in the first portion, wherein each of the second plurality of bone screw holes extends from the top surface to the bottom surface, wherein the first bone fixation plate is secured between the second bone fixation plate and a distal portion of the bone to which the second bone fixation plate is attached.EE48. The bone fixation system of EE47, further comprising a plurality of bone screws configured to be received by the first bone fixation plate and the second bone fixation plate.EE49. A method of affixing a first bone fixation plate and a second bone fixation plate to an underlying bone, the method comprising: aligning a first bone fixation plate with an underlying bone, the first bone fixation plate defining a first portion that is substantially planar, a second portion that is curved, a first plurality of bone screw holes arranged on the second portion of the asymmetric plate body, and a second plurality of bone screw holes arranged on the first portion; inserting a first plurality of bone screws into the first plurality of bone screw holes and the second plurality of bone screw holes to secure the first bone fixation plate to the underlying bone; inserting the first bone fixation plate into abutment with the underlying bone;aligning a second bone fixation plate with the underlying bone proximate to the first bone fixation plate, the second bone fixation plate defining a third plurality of bone screw holes, a third portion that is substantially planar, a fourth portion that is disposed at an angle from the third portion, a plurality of third plurality of bone screw holes, one or more first hooks extending from a distal edge of the second bone fixation plate distal from the third portion, and one or more second hooks extending from a side edge of the second portion proximate to the distal edge, wherein the second bone fixation plate is aligned such that one side of the first bone fixation plate is proximate to one side of the second bone fixation plate and such that the one or more first hooks extending from the distal edge of the second bone fixation plate abut a distal portion of the underyling bone and the one or more second hooks extending from the side edge of the second bone fixation plate abut a side of the distal portion of the underlying bone; and inserting a second plurality of bone screws into the third plurality of bone screw holes to secure the second bone fixation plate to the underlying bone.EE50. The method of EE49, wherein the first bone fixation plate is configured to cover only a radial side of the bone.

[0139] It should be emphasized that the above-described embodiments of the present disclosure, particularly, any detailed discussion of particular examples are merely possible examples of implementations and are set forth for a clear understanding of the principles of the disclosure. Many variations and modifications may be made to the above-described embodiment(s) of the disclosure without departing substantially from the spirit and principles of the disclosure. All such modifications and variations are intended to be included herein within the scope of this disclosure and the present disclosure and protected by the following claims.

Claims

What is claimed is:

1. A bone fixation plate configured to be secured to a bone, the bone fixation plate comprising: a plate body having a top surface and a bottom surface, wherein the bottom surface is a bone abutment surface, the plate body comprising: a first portion that is substantially planar for placement on a long portion of the bone; a second portion that is disposed at an angle to the first portion for placement on a head of the bone, wherein the second portion defines a distal edge that is distal from the first portion; a first plurality of bone screw holes arranged in the second portion, wherein each of the first plurality of bone screw holes extends from the top surface to the bottom surface; and a second plurality of bone screw holes arranged in the first portion, wherein each of the second plurality of bone screw holes extends from the top surface to the bottom surface; and a fragment hook extension that extends from the distal edge of the plate body, the fragment hook extension configured to secure a fracture on a distal portion of the bone, the fragment hook extension comprising one or more hooks that extend beyond the plate body, each of the one or more hooks configured to engage the distal portion of the bone.

2. The bone fixation plate of claim 1 , wherein the fragment hook extension further comprises a plate portion disposed between the one or more hooks and the plate body, and wherein the fragment hook extension is rounded such that the plate defines a cross-sectional shape that matches the distal portion of the bone.

3. The bone fixation plate of claim 1 or 2, wherein the fragment hook extension is monolithic with the plate body.

4. The bone fixation plate of any of claims 1 to 3, wherein the fragment hook extension comprises three hooks.

5. The bone fixation plate of claim 4, wherein the one or more hooks are evenly spaced.

6. The bone fixation plate of any of claims 1 to 5, wherein each of the one or more hooks defines a pointed end.

7. The bone fixation plate of claim 6, wherein the pointed end defines a portion of the respective hook that tapers to a point.

8. The bone fixation plate of any of claims 1 to 7, wherein the one or more hooks are oriented to restrict movement of a bone fragment associated with the fracture on the distal portion of the bone.

9. The bone fixation plate of any of claims 1 to 8, wherein the plate body further comprises an opening through at least a portion of the first portion and a portion of the second portion, the opening having a profile that substantially matches an outer profile of the plate body, wherein the opening is configured to enable viewing of a fracture in the bone.

10. The bone fixation plate of any of claims 1 to 9, wherein the first portion extends along a longitudinal direction defined by a longitudinal axis.

11. The bone fixation plate of claim 10, wherein the fragment hook extension extends from a side portion of the distal edge of the plate body, and wherein the fragment hook extension extends beyond the distal edge of the plate body .

12. The bone fixation plate of claim 11, wherein the side portion is offset from a center of the plate body in a transverse direction that is perpendicular to the longitudinal direction.

13. The bone fixation plate of claim 12, wherein at least one of the one or more hooks extends beyond the plate body in the transverse direction.

14. The bone fixation plate of any of claims 1 to 13, further comprising an attachment hole configured to receive a fastener to secure a guide block to the bone fixation plate.

15. The bone fixation plate of any of claims 1 to 14, wherein the second portion is curved away from the longitudinal axis.

16. The bone fixation plate of any of claims 1 to 15, further comprising a plurality of bone screws configured to be received by the plurality of bone screw holes.

17. The bone fixation plate of any of claims 1 to 16, wherein the bone abutment surface defines a contour that corresponds to a shape of the bone.

18. A bone fixation plate configured to be secured to a bone, the bone fixation plate comprising: a plate body having a top surface and a bottom surface, wherein the bottom surface is a bone abutment surface, the plate body comprising: a first portion that is substantially planar and extends along a longitudinal direction that is defined by a longitudinal axis; a second portion that is substantially planar and extends substantially in the longitudinal direction, wherein the second portion defines a distal edge that is distal from the first portion; a plurality of bone screw holes arranged in the first portion and the second portion that extend from the top surface to the bottom surface; and a hook portion that extends from the second portion, the hook portion comprising: a plurality of first hooks that extend beyond the plate body substantially in the longitudinal direction, configured to engage a distal portion of a bone to secure a fracture; anda plurality of second hooks that extend beyond the plate body substantially in a transverse direction that is perpendicular to the longitudinal direction, wherein the distal edge and the hook portion are offset from the first portion in the transverse direction.

19. The bone fixation plate of claim 18, wherein the plurality of second hooks extend from a side edge of the second portion proximate to the distal edge of the second portion.

20. The bone fixation plate of claim 18 or 19, wherein the plurality of second hooks extend only from one side edge of the second portion.

21. The bone fixation plate of any of claims 18 to 20, wherein two of the plurality of bone screw holes are arranged side by side on the second portion such that they are the same distance in the longitudinal direction from the first portion.

22. The bone fixation plate of any of claims 18 to 21, wherein the plurality of first hooks extend from an end of the second portion that is distal from the first portion.

23. The bone fixation plate of claim 22, wherein the plurality of first hooks comprise three hooks extending from the end of the second portion that is distal from the first portion.

24. The bone fixation plate of claim 23, wherein the three hooks are substantially parallel with one another.

25. The bone fixation plate of any of claims 18 to 24, further comprising a plurality of bone screws configured to be received by the plurality of bone screw holes.

26. The bone fixation plate of any of claims 18 to 25, wherein the plurality of bone screw holes comprises a combination hole that defines an elongated compression hole portion and a substantially circular threaded portion.

27. The bone fixation plate of claim 26, wherein the first portion defines one bone screw hole and the combination hole.

28. The bone fixation plate of claim 27, wherein the combination hole is located on the first portion proximate to the third portion.

29. The bone fixation plate of claim 27, wherein the combination hole is located between the one bone screw hole and the third portion.

30. The bone fixation plate of any of claims 1 to 29, further comprising a third portion between the first portion and the second portion.

31. The bone fixation plate of claim 30, wherein the third portion is disposed at an angle to the first portion.

32. The bone fixation plate of claim 31 , wherein the third portion defines the offset of the distal edge and the hook portion from the first portion in the transverse direction.

33. The bone fixation plate of claim 30, wherein the third portion defines one bone screw hole.

34. The bone fixation plate of any of claims 18 to 33, wherein the second portion defines two bone screw holes.

35. The bone fixation plate of claim 34, wherein the two bone screw holes on the second portion are located proximate to the hook portion.

36. The bone fixation plate of any of claims 18 to 35, wherein the second portion extends along a third axis that is substantially parallel to the longitudinal axis.

37. The bone fixation plate of any of claims 18 to 35, wherein the distal edge and the hook portion are offset from the first portion in the transverse direction by a distance in the range of 1 to 5mm.

38. A first bone fixation plate comprising: an asymmetric plate body having a top surface and a bottom surface, the asymmetric plate body configured to be secured to a second bone fixation plate that is attached to a bone, the asymmetric plate body comprising: a first portion extending along a longitudinal axis that defines a longitudinal direction, the first portion comprising a first bone screw hole; and a second portion that is offset from the first portion in a transverse direction that is substantially perpendicular to the longitudinal direction such that a radial side of the second portion is offset from a radial side of the first portion by a range of 40 to 80 percent of a distance between an ulnar side of the first portion and the radial side of the first portion, the second portion defining a distal edge of the plate body, the second portion comprising a second bone screw hole proximate to the distal edge of the plate body; and a plurality of hooks extending from the distal edge of the plate body, the plurality of hooks configured to engage a bone fragment that is proximate to a distal end of the bone; and a first aperture extending through the plate body, the aperture configured to receive a fastener to secure the first bone fixation plate to the second bone fixation plate and enable proximal-distal adjustment of the plurality of hooks with respect to the bone.

39. The first bone fixation plate of claim 38, wherein each of the plurality of hooks defines a hook end that is configured to engage the bone fragment.

40. The first bone fixation plate of claim 39, wherein the hook end tapers to a point such that the hook end is a pointed end.

41. The first bone fixation plate of any of claims 38 to 40, wherein the plurality of hooks comprises a first hook that extends from the distal edge of the plate body proximate to the radial side of the second portion and a second hook that extends from the distal edge of the plate body proximate to an ulnar side of the second portion.

42. The first bone fixation plate of any of claims 38 to 41, wherein the first bone screw hole is offset from a center of the first portion defined by the longitudinal axis in the transverse direction.

43. The first bone fixation plate of claim 42, wherein the first bone screw hole is configured to allow a bone screw to extend through the first bone screw hole, through a viewing hole opening in the second bone fixation plate, and into the bone.

44. The first bone fixation plate of any of claims 38 to 43, wherein the proximal- distal adjustment of the hook portion is along the longitudinal axis.

45. The first bone fixation plate of any of claims 38 to 44, further comprising a third portion between the first portion and the second portion, the third portion disposed at an angle to the first portion wherein the third portion is configured to enable the plurality of hooks to anchor the bone fragment that is spaced away from a center portion of the distal end of the bone.

46. The first bone fixation plate of claim 45, wherein the third portion enables the offset of the second portion in the transverse direction.

47. The first bone fixation plate of claim 45, wherein the angle is in a range of 10 to 30 degrees.

48. The first bone fixation plate of claim 45, wherein the third portion is configured to enable the one or more hooks to engage the bone fragment proximate to the distal end of the bone.

49. The first bone fixation plate of claim 45, wherein the second portion and the third portion define a concave portion of the bottom surface.

50. The first bone fixation plate of any of claims 38 to 49, wherein the first aperture is slotted along a direction defined by the longitudinal axis.

51. The first bone fixation plate of any of claims 38 to 50, wherein the first portion defines a convex portion of the bottom surface.

52. The first bone fixation plate of any of claims 38 to 51, wherein the first portion comprises a second aperture.

53. The first bone fixation plate of claim 52, wherein the second aperture is a k-wire hole.

54. The first bone fixation plate of any of claims 38 to 53, wherein the radial side of the second portion is offset from a radial side of the first portion by 60 percent of the distance between the ulnar side of the first portion and the radial side of the first portion.

55. The first bone fixation plate of any of claims 38 to 54, wherein the first aperture is configured to prevent loosening of a fastener received therein.

56. The first bone fixation plate of claim 55, wherein the first portion comprises a pattern of repeating peaks and valleys that surround the first aperture.

57. A bone fixation system comprising: a first bone fixation plate attached to a bone, the first bone fixation plate defining a plurality of first bone screw holes and a plate attachment hole; a second bone fixation plate comprising: an asymmetric plate body having a top surface and a bottom surface, the asymmetric plate body configured to be secured to a second bone fixation plate that is attached to a bone, the asymmetric plate body comprising:a first portion extending along a longitudinal axis that defines a longitudinal direction, the first portion comprising a second bone screw hole; and a second portion that is offset from the first portion in a transverse direction that is substantially perpendicular to the longitudinal direction such that a radial side of the second portion is offset from a radial side of the first portion by a range of 40 to 80 percent of a distance between an ulnar side of the first portion and the radial side of the first portion, the second portion defining a distal edge of the plate body, the second portion comprising a third bone screw hole proximate to the distal edge of the plate body; and a plurality of hooks extending from the distal edge of the plate body, the plurality of hooks configured to engage a bone fragment that is proximate to a distal end of the bone; and a first aperture extending through the plate body, the aperture configured to receive a fastener that is received by the plate attachment hole to secure the second bone fixation plate to the first fixation plate and enable proximal- distal adjustment of the hook portion with respect to the bone.

58. The bone fixation system of claim 57, further comprising a plurality of bone screws configured to be received by the first bone fixation plate or the second bone fixation plate.

59. A first bone fixation plate comprising: a plate body configured to be secured between a second bone fixation plate and a distal portion of a bone to which the second bone fixation plate is attached; a plurality of first apertures through the plate body that are configured to receive one or more fasteners that attach the first bone fixation plate to the bone, the plurality of first apertures arranged in sets of four first apertures; one or more second apertures through the plate body between each set of four first apertures, the one or more second apertures anda hook portion configured to extend from the plate body, the hook portion comprising two hooks extending from each set of four first apertures that are configured to anchor a bone fragment that is spaced away from a center portion of a distal end of the bone.

60. The first bone fixation plate of claim 59, wherein the distal portion of the bone is a distal portion of an intermediate column of a distal radius.

61. The first bone fixation plate of claim 59 or 60, wherein each of the one or more second apertures comprises: a concave section arranged between each respective pair of the first apertures; and a convex section that corresponds to an outer edge of each respective first aperture.

62. The first bone fixation plate of any of claims 59 to 61, wherein each set of four first apertures are arranged in a rectangular pattern.

63. The first bone fixation plate of any of claims 59 to 62, wherein each of the one or more hooks defines a hook end that is configured to engage the bone fragment.

64. A bone fixation system comprising: a first bone fixation plate comprising: a plate body; a plurality of first apertures through the plate body that are configured to receive one or more fasteners that attach the first bone fixation plate to the bone, the plurality of first apertures arranged in sets of four first apertures; one or more second apertures through the plate body between each set of four first apertures, the one or more second apertures and a hook portion configured to extend from the plate body, the hook portion comprising two hooks extending from each set of four first apertures that are configured to anchor a bone fragment that is spaced away from a center portion of a distal end of the bone; and the second bone fixation plate comprising:a plate body having a top surface and a bottom surface, wherein the bottom surface is a bone abutment surface, the plate body comprising: a first portion that is substantially planar for placement on a long portion of the bone; a second portion that is disposed at an angle to the first portion for placement on a head of the bone, wherein the second portion defines a distal edge that is distal from the first portion; a first plurality of bone screw holes arranged in the second portion, wherein each of the first plurality of bone screw holes extends from the top surface to the bottom surface; and a second plurality of bone screw holes arranged in the first portion, wherein each of the second plurality of bone screw holes extends from the top surface to the bottom surface, wherein the first bone fixation plate is secured between the second bone fixation plate and a distal portion of the bone to which the second bone fixation plate is attached .

65. The bone fixation system of claim 64, further comprising a plurality of bone screws configured to be received by the first bone fixation plate and the second bone fixation plate.

66. A method of affixing a first bone fixation plate and a second bone fixation plate to an underlying bone, the method comprising: aligning a first bone fixation plate with an underlying bone, the first bone fixation plate defining a a first portion that is substantially planar, a second portion that is curved, a first plurality of bone screw holes arranged on the second portion of the asymmetric plate body, and a second plurality of bone screw holes arranged on the first portion; inserting a first plurality of bone screws into the first plurality of bone screw holes and the second plurality of bone screw holes to secure the first bone fixation plate to the underlying bone; inserting the first bone fixation plate into abutment with the underlying bone; aligning a second bone fixation plate with the underlying bone proximate to the first bone fixation plate, the second bone fixation plate defining a third plurality of bone screw holes, athird portion that is substantially planar, a fourth portion that is disposed at an angle from the third portion, a plurality of third plurality of bone screw holes, one or more first hooks extending from a distal edge of the second bone fixation plate distal from the third portion, and one or more second hooks extending from a side edge of the second portion proximate to the distal edge, wherein the second bone fixation plate is aligned such that one side of the first bone fixation plate is proximate to one side of the second bone fixation plate and such that the one or more first hooks extending from the distal edge of the second bone fixation plate abut a distal portion of the underyling bone and the one or more second hooks extending from the side edge of the second bone fixation plate abut a side of the distal portion of the underlying bone; and inserting a second plurality of bone screws into the third plurality of bone screw holes to secure the second bone fixation plate to the underlying bone.

67. The method of claim 66, wherein the first bone fixation plate is configured to cover only a radial side of the bone.

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