Acetabular prosthesis with adjustable acetabular cup cage

Abstract

An acetabular prosthesis (100) for use in hip arthroplasty surgery includes an acetabular cup cage (102) assembly including an outer cup cage (110) and an inner cup cage (210). The outer cup cage includes a hemispherical cup (112) and a mounting flange (114). Similarly, the inner cup cage also includes a hemispherical cup (212) and a corresponding mounting flange (214). The hemispherical cups of the inner cup cage are sized to be received into the hemispherical cups of the outer cup cage, and the two cup cages are rotatable relative to each other to position the mounting flange into a desired position on the patient's hip bone.

Description

[0001] This application claims priority to U.S. patent application No. 17 / 740,813, filed on May 10, 2022, which is incorporated herein by reference in its entirety. Technical Field

[0002] The present disclosure relates generally to orthopaedic surgical instruments and, more particularly, to acetabular prosthetic components. Background Art

[0003] Arthroplasty is a kind of well-known surgical operation, by arthroplasty with prosthetic joint replacement diseased and / or damaged natural joint.Typical artificial joint comprises hip prosthesis, knee prosthesis, shoulder prosthesis, ankle prosthesis and wrist prosthesis etc.In hip arthroplasty operation, for example, at least a portion of patient's hip ball-and-socket joint is replaced by one or more corresponding prosthetic components.In such operation, the socket of joint (being referred to as acetabulum) can be replaced with one or more acetabular prosthetic components (for example, acetabular cup or shell that is fitted in acetabulum and be fitted in acetabular cup to be used as the liner of bearing surface).Similarly, the ball of joint (being referred to as femoral head) can be replaced with femoral head prosthetic component.

[0004] In some hip arthroplasty operations, the standard acetabular prosthesis including the acetabular cup and the associated cup liner can be further enhanced with additional acetabular prosthesis components. For example, in surgical situations where the patient has significant bone loss in the region of the acetabulum and / or in some revision surgeries, the acetabular cup cage can be used to improve the fixation of the acetabular cup. Typical acetabular cup cages include a hemispherical cup that receives the acetabular cup and a fixed mounting flange that fixes the hemispherical cup to the patient's coxal bone (that is, the bone anatomical structure around the acetabulum of the patient's hip). However, due to the fixed orientation of the mounting flange and the variability of the patient's coxal geometry, it may be difficult for orthopedic surgeons to correctly orient typical acetabular cup cages to achieve the desired fixation on the patient's bone anatomical structure. Summary of the invention

[0005] According to one aspect of the present disclosure, an acetabular prosthesis for hip arthroplasty surgery includes an outer cup cage and an inner cup cage. The outer cup cage includes a first hemispherical cup and a first mounting flange extending from the edge of the first hemispherical cup. The inner cup cage includes a second hemispherical cup and a second mounting flange extending from the edge of the second hemispherical cup. The second hemispherical cup can be sized to be nested in the first hemispherical cup. In addition, when the second hemispherical cup is nested in the first hemispherical cup, each of the inner cup cage and the outer cup cage can be rotated relative to each other about an axis extending through the apex of each of the first hemispherical cup and the second hemispherical cup to selectively position the first mounting flange and the second mounting flange.

[0006] In some embodiments, the first mounting flange can be embodied as an ilium mounting flange having a first mounting aperture and configured to be secured to an ilium of a patient's hip via the first mounting aperture. Additionally, in some embodiments, the second mounting flange can be embodied as an ischium mounting flange having a second mounting aperture and configured to be secured to an ischium of a patient's hip via the second mounting aperture. Additionally, in some embodiments, the first mounting flange can have a surface area greater than a surface area of ​​the second mounting flange. The first mounting flange and the second mounting flange can also be malleable to allow the shapes of the first mounting flange and the second mounting flange to deform.

[0007] Additionally, in some embodiments, at least one of the first hemispherical cup and the second hemispherical cup is hemi-hemispherical. In some embodiments, the diameter of the first hemispherical cup is greater than the diameter of the second hemispherical cup. Additionally, in some embodiments, each of the first hemispherical cup and the second hemispherical cup includes a plurality of mounting holes defined therethrough. In such embodiments, each of the inner cup cage and the outer cup cage may be rotatable to align at least one mounting hole of the first hemispherical cup with at least one mounting hole of the second hemispherical cup.

[0008] In some embodiments, the first hemispherical cup may include an inner concave surface and an outer convex surface. In such embodiments, the edge of the first hemispherical cup extends from the inner concave surface of the first hemispherical cup to the outer convex surface. Additionally, in some embodiments, the second hemispherical cup includes an inner concave surface and an outer convex surface. In such embodiments, the edge of the second hemispherical cup extends from the inner concave surface of the second hemispherical cup to the outer convex surface.

[0009] In addition, in some embodiments, the first hemispherical cup of the outer cup cage may include an elongated track, and the second hemispherical cup may include a guide tab received in the elongated track. When the inner cup cage and the outer cup cage rotate about the axis, the guide tab of the second hemispherical cup moves within the elongated track of the first hemispherical cup. In some embodiments, the elongated track may include an elongated opening, and when the second hemispherical cup is nested into the first hemispherical cup, the guide tab of the second hemispherical cup can be inserted into the elongated opening. In addition, in some embodiments, the guide tab can be captured within the elongated track so that the inner cup cage is fixed to the outer cup cage.

[0010] According to another aspect of the present disclosure, a method of performing an orthopaedic surgical procedure on a patient's hip includes inserting an outer cup cage of an acetabular prosthesis into the patient's acetabulum and inserting an inner cup cage of the acetabular prosthesis into the outer cup cage. The outer cup cage may include a first hemispherical cup and a first mounting flange extending from an edge of the first hemispherical cup. Similarly, the inner cup cage may include a second hemispherical cup and a second mounting flange extending from an edge of the second hemispherical cup. In some embodiments, inserting the inner cup cage may include nesting the second hemispherical cup into the first hemispherical cup. The method may also include rotating at least one of the inner cup cage and the outer cup cage relative to each other about an axis extending through the apex of each of the first hemispherical cup and the second hemispherical cup, while the second hemispherical cup is nested in the first hemispherical cup to position the first mounting flange and the second mounting flange in corresponding desired positions, and fixing the first mounting flange and the second mounting flange to the patient's hip bone.

[0011] In some embodiments, the method may further include securing the first hemispherical cup and the second hemispherical cup to the patient's acetabulum. Additionally, in some embodiments, the method may include inserting the acetabular cup prosthesis into the second hemispherical cup of the inner cup cage. In such embodiments, the method may further include securing the first hemispherical cup and the second hemispherical cup and the acetabular cup prosthesis to the patient's acetabulum using bone cement.

[0012] In some embodiments, inserting the inner cup cage holder into the outer cup cage holder may include inserting a guide tab of the second hemispherical cup of the inner cup cage holder into an elongated track of the first hemispherical cup of the outer cup cage holder. In such embodiments, rotating at least one of the inner cup cage holder and the outer cup cage holder relative to each other may include moving the guide tab within the elongated track.

[0013] Additionally, in some embodiments, the first mounting flange may be embodied as an ilium mounting flange and the second mounting flange may be embodied as a ischium mounting flange. In such embodiments, rotating at least one of the inner cup cage frame and the outer cup cage frame relative to each other may include positioning the ilium mounting flange on the ilium of the patient's hip and positioning the ischium mounting flange on the ischium of the patient's hip.

[0014] According to another aspect of the present disclosure, an acetabular prosthesis for hip arthroplasty surgery includes an outer cup cage, an inner cup cage, and an acetabular cup prosthesis. The outer cup cage includes a first semi-hemispherical cup and an ilium mounting flange extending from the edge of the first semi-hemispherical cup. The inner cup cage includes a second semi-hemispherical cup and an ischium extending from the edge of the second semi-hemispherical cup. In addition, the outer diameter of the second semi-hemispherical cup is smaller than the inner diameter of the first semi-hemispherical cup, which allows the second semi-hemispherical cup to be received in the first semi-hemispherical cup.

[0015] The acetabular cup prosthesis includes an outer diameter that is smaller than the inner diameter of the second hemi-hemispherical cup, which allows the acetabular cup prosthesis to be received within the second hemi-hemispherical cup. In addition, when the second hemi-hemispherical cup is received within the first hemi-hemispherical cup, each of the inner cup cage and the outer cup cage can be rotated relative to each other to independently position the ilium flange and the ischium flange.

[0016] In some embodiments, the first semi-hemispherical cup of the outer cup cage includes an elongated track, and the second semi-hemispherical cup includes a guide tab that can be received in the elongated track. In such embodiments, when the inner cup cage and the outer cup cage rotate about the axis, the guide tab of the second semi-hemispherical cup moves within the elongated track of the first semi-hemispherical cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation method specifically refers to the following drawings, in which:

[0018] Figure 1 is a perspective view of an acetabular prosthesis including an acetabular cup cage assembly and an acetabular cup implanted in a patient's hip;

[0019] Figure 2 yes Figure 1 An exploded perspective view of an embodiment of an acetabular prosthesis;

[0020] Figure 3 yes Figure 2 A top plan view of an outer cup cage of an acetabular cup cage assembly;

[0021] Figure 4 yes Figure 2 A top plan view of an inner cup cage of an acetabular cup cage assembly;

[0022] Figure 5 yes Figure 1 A top plan view of an acetabular cup cage assembly showing an inner cup cage received within an outer cup cage, wherein a flange of the inner cup cage is located at an initial position;

[0023] Figure 6 yes Figure 5 A top plan view of an acetabular cup cage assembly showing an inner cup cage rotated relative to an outer cup cage, wherein a flange of the inner cup cage is located at a new position;

[0024] Figure 7 yes Figure 1 A top plan view of another embodiment of an acetabular cup cage assembly of an acetabular prosthesis, wherein the outer cup cage includes an elongated track and the inner cup cage includes a guide tab received in the elongated track of the outer cup cage;

[0025] Figure 8 yes Figure 7 A side elevation view of an acetabular cup cage assembly;

[0026] Fig. 9 For implantation Figure 1 A simplified flow chart of a method for providing an acetabular prosthesis;

[0027] Fig.10 is Fig. 9 A simplified illustration of a patient's hip bone during acetabular reaming surgery of the method;

[0028] Fig.11 It is executing Fig. 9 implanted into the patient's hip bone during the procedure Figure 1 Perspective view of the acetabular prosthesis;

[0029] Fig.12 It is implanted into the patient's hip bone. Figure 1 Perspective view of the acetabular prosthesis with the inner cup cage in place Fig. 9 Rotate to the initial position during the method;

[0030] Fig.13 yes Fig.12 Perspective view of the acetabular prosthesis with the inner cup cage rotated to a new position to perform Fig. 9 repositioning the flange of the inner cup cage to a desired position on the patient's hip bone during the method; and

[0031] Fig.14 It is implanted into the patient's hip bone. Figure 1 Perspective view of an acetabular prosthesis with the femoral component in place Fig. 9 During the method the acetabular cup is inserted into the acetabular prosthesis. DETAILED DESCRIPTION

[0032] Although the concepts of the present disclosure are susceptible to various modifications and alternative forms, specific exemplary embodiments thereof have been shown by way of example in the accompanying drawings and will be described in detail herein. However, it should be understood that it is not intended that the concepts of the present disclosure be limited to the specific forms disclosed herein, but on the contrary, the purpose of the present invention is to cover all modifications, equivalents and alternative forms that fall within the spirit and scope of the present invention as defined by the appended claims.

[0033] Throughout the specification, when referring to the plastic surgery implants and surgical instruments described herein and the natural anatomy of the patient, terms indicating anatomical references may be used, such as anterior, posterior, medial, lateral, superior, inferior, etc. These terms have well-known meanings in the field of anatomical research and plastic surgery. Unless otherwise specified, these anatomical reference terms used in the written detailed description and claims are intended to be consistent with their well-known meanings.

[0034] References to "one embodiment", "embodiment", "illustrative embodiment", etc. in this specification mean that the embodiment may include a particular feature, structure, or characteristic, but each embodiment may or may not include the particular feature, structure, or characteristic. In addition, these terms do not necessarily refer to the same embodiment. In addition, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it should be considered that it is within the knowledge of a technician in the field to implement such a particular feature, structure, or characteristic in conjunction with other embodiments, whether or not an explicit description is made. In addition, it should be understood that an item included in a list in the form of "at least one of A, B, and C" may mean (A); (B); (C); (A and B); (A and C); (B and C); or (A, B, and C). Similarly, an item listed in the form of "at least one of A, B, or C" may mean (A); (B); (C); (A and B); (A and C); (B and C); or (A, B, and C).

[0035] In the accompanying drawings, some structural or method features may be shown in a specific arrangement and / or order. However, it should be understood that such specific arrangement and / or order may not be required. On the contrary, in some embodiments, such features may be arranged in a different manner and / or order than shown in the illustrative drawings. In addition, the inclusion of structural or method features in a particular drawing does not mean that such features are required in all embodiments, and in some embodiments, these features may not be included or may be combined with other features.

[0036] refer to Figure 1 , the exemplary acetabular prosthesis 100 includes an acetabular cup cage assembly 102 and an acetabular cup 104, each of which is configured to be implanted in the acetabulum of a patient's hip bone 150 during the performance of a corresponding orthopedic surgery. As discussed in more detail below, the acetabular cup cage assembly 102 provides the acetabular cup 104 with additional support and fixation to the patient's hip bone, and can be used in a variety of situations, including those in which the patient's hip bone 150 has significant bone loss or degeneration. In addition, as discussed in more detail below, the acetabular cup cage assembly 102 is adjustable to modify the installation position of the acetabular cup cage assembly 102 to compensate for the specific geometry and / or bone loss of the patient's hip bone (e.g., the geometry of the patient's acetabulum, ilium, and ischium).

[0037] like Figure 2As shown, the exemplary acetabular cup cage assembly 102 of the acetabular prosthesis 100 includes an outer cup cage 110 and an inner cup cage 210, which are separate from each other and can move independently, as discussed in more detail below. In addition, as discussed further below, the inner cup cage 210 is configured to be nested or otherwise received in the outer cup cage 110. Similarly, the acetabular cup 104 is configured to be received in the inner cup cage 210. The acetabular cup 104, the inner cup cage 210, and the outer cup cage 110 can be fixed to the patient's acetabulum, and the inner cup cage 110 and the outer cup cage 210 can also be fixed to the surrounding bone area, such as the patient's ilium and ischium as described below.

[0038] The outer cup cage 110 includes a hemispherical cup 112 and a mounting flange 114 extending from an edge 116 of the hemispherical cup 112. Similarly, the inner cup cage 210 includes a hemispherical cup 212 and a mounting flange 214 extending from an edge 216 of the hemispherical cup 212.

[0039] As described below, the hemispherical cup 212 of the inner cup cage 210 is shaped and sized to be received in the hemispherical cup 112 of the outer cup cage 110, so that the inner cup cage 210 can be nested in the outer cup cage 110, as shown in FIG. Figure 1 It should be understood that, as used herein, the term "hemispherical" is intended to be a broad term that includes hemispherical, semi-hemispherical, and other geometric structures that resemble hemispherical but not necessarily limit perfect hemispherical shapes. For example, the exemplary hemispherical cups 112, 212 are as follows Figure 2 The illustrated hemi-hemispherical shape approximates a quarter sphere. However, in other embodiments, the hemispherical cup 112, 212 may have a full hemispherical shape or a shape between a hemi-hemispherical and a full hemispherical shape.

[0040] like Figure 2 and Figure 3As best shown in FIG. 1 , the hemispherical cup 112 of the outer cup cage 110 includes an inner concave surface 118 and an outer convex surface 120 opposite the inner surface 118. The rim 116 extends from the inner surface 118 to the outer surface 120, and further extends radially outward from the outer surface 120 to form a lip 122 of the hemispherical cup 112. The rim 116 provides support for the rim 216 of the inner hemispherical cup 212, and in some specific implementations may also contact the rim of the patient's acetabulum. In some embodiments, the outer surface 120 of the hemispherical cup 112 may have an increased surface roughness and / or a porous coating to improve fixation of the hemispherical cup 112 to the patient's acetabulum. In addition, the hemispherical cup 112 includes one or more mounting apertures 124 that extend completely through the hemispherical cup 112 (i.e., from the inner surface 118 to the outer surface 120). In use, as described below, the mounting apertures 124 may be used to secure the hemispherical cup 112 to the patient's acetabulum using associated fixation devices (eg, bone screws), bone cement, and / or other fixation mechanisms.

[0041] As described above, flange 114 extends from edge 116 of hemispherical cup 112. Flange 114 is configured for attachment to the ilium of the patient's hip bone 150 (or other portion of the patient's hip bone 150) and is illustratively larger than flange 214 of hemispherical cup 212 of inner cup cage 210 (i.e., illustrative flange 114 has a larger surface area than flange 214). However, in other embodiments, flange 114 and flange 214 may have similar sizes and / or shapes.

[0042] To facilitate attachment of the flange 114 to the patient's ilium, the flange 114 includes one or more mounting apertures 126 that extend completely through the flange 114. Illustratively, the flange 114 includes multiple apertures 126, but may include only a single mounting aperture in other embodiments. As discussed in more detail below, the mounting apertures 126 can be used to secure the flange 114 to the patient's ilium (or other areas of the patient's hip bone 150) using a suitable fixation device (such as a bone screw).

[0043] like Figure 2 and Figure 4 As best shown in FIG. 1 , the hemispherical cup 212 of the inner cup cage 210 is similar to the hemispherical cup 112 of the outer cup cage 110. For example, the hemispherical cup 212 also includes an inner concave surface 218 and an outer convex surface 220 opposite the inner surface 118. The edge 216 extends from the inner surface 218 to the outer surface 220 and further extends radially outward from the outer surface 220 to form a lip 222 of the hemispherical cup 212. When the hemispherical cup 212 is nested into the hemispherical cup 112 of the outer cup cage 110, the edge 216 of the hemispherical cup 212 can be configured to contact and be supported by the edge 116 of the hemispherical cup 112.

[0044] In some embodiments, the outer surface 220 of the hemispherical cup 212 of the inner cup cage 210 and / or the inner surface 118 of the hemispherical cup 112 of the outer cup cage 110 may have an increased surface roughness and / or a porous coating such that the outer surface 220 and the inner surface 118 cooperate to provide a certain amount of resistance to relative movement between the hemispherical cups 112, 212. In this manner and as discussed in more detail below, the plastic surgeon may rotate the hemispherical cups 112, 212 to a desired position and the desired position is maintained at least to some extent by the "locking" nature of the outer surface 220 and the inner surface 118. However, in other embodiments, the outer surface 220 of the hemispherical cup 112 and the inner surface 118 of the hemispherical cup 212 may be relatively smooth, thereby facilitating relative movement between the hemispherical cups 112, 212.

[0045] Similar to the hemispherical cup 112 of the outer cup cage 110, the hemispherical cup 212 of the inner cup cage 210 includes one or more mounting apertures 224 that extend completely through the hemispherical cup 212 (i.e., from the inner surface 218 to the outer surface 220). In use, the mounting apertures 224 can be used to secure the hemispherical cup 212 to the patient's acetabulum using an associated fixation device (e.g., bone screws), bone cement, and / or other fixation mechanism. To this end, as discussed in more detail below, an orthopaedic surgeon can fully or partially align one or more of the mounting apertures 224 of the hemispherical cup 212 of the inner cup cage 210 with corresponding mounting apertures 124 of the hemispherical cup 112 of the outer cup cage 110.

[0046] As described above, the flange 214 extends from the edge 216 of the hemispherical cup 212. The flange 214 is configured for attachment to the ischium of the patient's hip bone 150 and is illustratively smaller than the flange 114 of the hemispherical cup 112 of the outer cup cage 110 (i.e., the exemplary flange 214 has a smaller surface area than the flange 114). To facilitate attachment of the flange 214 to the patient's ischium, the flange 214 includes a mounting aperture 226 that extends completely through the flange 214. Although the exemplary flange 214 includes a single mounting aperture 226, in other embodiments, the flange 214 may include additional mounting apertures 226. As discussed in more detail below, the mounting apertures 226 can be used to secure the flange 214 to the patient's ischium (or other area of ​​the patient's hip bone 150) using a suitable fixation device (such as a bone screw).

[0047] The outer cup cage 110 and the inner cup cage 210 can be formed of any material capable of providing support and fixation for the acetabular cup 104. Illustratively, the cup cages 110, 210 are formed of a surgical metal material or alloy (such as a titanium alloy). Illustratively, the cup cages 110, 210 are formed of a material that allows the flanges 114, 214 to be hand-extendable and / or have a thickness that allows these flanges to be hand-extendable, so that the orthopedic surgeon can change the shape of the flanges 114, 214 to adapt to the natural geometry of the patient's hip bone. However, in other embodiments, the cup cages 110, 210 can be made of a more rigid material. In addition, in some embodiments, the outer cup cage 110 and the inner cup cage 210 can be manufactured via a three-dimensional printing process.

[0048] Reference now Figure 5 and Figure 6 As described above, the hemispherical cup 212 of the inner cup cage 210 is shaped, sized, and configured to be nested in the hemispherical cup 112 of the outer cup cage 210. That is, the hemispherical cup 212 has an outer diameter 230 (i.e., a diameter distance measured between the outer surfaces 220 of the hemispherical cup 112) that is slightly smaller than the inner diameter 130 of the hemispherical cup 212 (i.e., a diameter distance measured between the inner surfaces 118 of the hemispherical cup 112), which allows the hemispherical cup 212 to be received in the hemispherical cup 112.

[0049] As described above, the outer cup cage 110 and the inner cup cage 210 are separate components in the exemplary embodiment, which allows relative movement between the cup cages 110, 210. Figure 5 As shown, when the hemispherical cup 212 of the inner cup cage 210 is Figure 5 When nested or otherwise received in the hemispherical cup 112 of the outer cup cage 110 as shown, the two cup cages 110, 210 can surround the apex 132 extending through the hemispherical cup 212 (see Figure 3 ) and the vertex 232 of the hemispherical cup 112 (see Figure 4 ) axis 170 (see Figure 2 ) are rotated relative to each other. In this way, the orthopaedic surgeon can selectively position the flanges 114, 214 to accommodate the specific geometry of the patient's hip bone. For example, Figure 5 and Figure 6 As shown in the comparison between the two, the plastic surgeon can selectively rotate the inner cup cage 110 and / or the outer cup cage 210 about the axis 170 and relative to each other to achieve the desired positioning as shown by arrow 500. In this way, the plastic surgeon can properly or better position the flange 114 of the outer cup cage 110 on the patient's ilium and properly position the flange 214 of the inner cup cage 210 on the patient's ischium.

[0050] In some embodiments, the outer cup cage 110 and the inner cup cage 210 may be coupled or otherwise attached together while still facilitating relative rotation or movement of the cup cages 110, 210. Figure 7 and Figure 8 As shown, in some embodiments, the outer cup cage holder 110 may include an elongated track or opening 700, and the inner cup cage holder 210 may include a guide tab 800. The exemplary elongated track 700 is embodied as a closed track defined entirely through the hemispherical cup 112, extending from the inner surface 118 to the outer surface 120. The elongated track 700 also extends along an arc of the circumference of the hemispherical cup 112, which allows the cup cage holders 110, 210 to rotate about the axis 170. When the cup cage holders 110, 210 rotate relative to each other, the guide tab 800 of the inner cup cage holder 210 is received in the elongated track 700 and moves within the elongated track 700.

[0051] In some embodiments, the inner cup cage 210 may also include an elongated track or opening 802 extending through the hemispherical cup 212 and along an arc of the circumference of the hemispherical cup 212. In such embodiments, when the hemispherical cup 112 is received in the hemispherical cup 212, the elongated tracks 700, 802 may partially coincide with each other, which allows the elongated tracks 700, 802 to be used as mounting apertures for securing the hemispherical cup 112, 212 to the patient's acetabulum (e.g., via bone screws or bone cement).

[0052] In an exemplary embodiment, when the inner cup cage holder 210 is nested into the outer cup cage holder 110, the guide tab 800 of the inner cup cage holder 210 is configured to be inserted into or otherwise received in the elongated track 700. Similarly, when the inner cup cage holder 210 is removed from the outer cup cage holder 110, the guide tab 800 can be removed from the elongated track 700. Alternatively, in other embodiments, the guide tab 800 is captured in the elongated track 700 so that the inner cup cage holder 210 and the outer cup cage holder 110 are attached or fixed to each other. In such embodiments, the inner cup cage holder and the outer cup cage holder 210 may be separable from each other or not separable from each other.

[0053] Reference now Fig. 9 In use, an orthopaedic surgeon may perform a method 900 for implanting an acetabular prosthesis 100 into a patient's hip bone 150. The method 900 begins at block 902, where the patient's acetabulum is surgically prepared to receive the acetabular prosthesis 100. For example, Fig.10 As shown, an orthopaedic surgeon may use the reamer 1000 to ream the patient's acetabulum to prepare the acetabulum to receive the acetabular prosthesis 100 .

[0054] After the patient's hip bone 150 has been prepared in frame 902, the method 900 proceeds to frame 904. In frame 904, the orthopaedic surgeon inserts the outer cup cage 110 into the patient's surgically prepared acetabulum. Additionally, in frame 906, the orthopaedic surgeon nests the inner cup cage 210 into the outer cup cage 110. To this end, as shown in FIG. Fig.11 As shown, the plastic surgeon inserts the hemispherical cup 212 of the inner cup cage 210 into the hemispherical cup 112 of the outer cup cage 110 .

[0055] In block 908, the plastic surgeon positions the mounting flange 114 of the outer cup cage 110 and the mounting flange 214 of the inner cup cage 210. To this end, as shown in blocks 910 and 912, the plastic surgeon may rotate the outer cup cage 110 relative to the inner cup cage 210 and / or rotate the inner cup cage 210 relative to the outer cup cage 110 about the axis 170 (see FIG. Fig.11 ). For example, Fig.12 and Fig.13 As shown in comparison, the orthopaedic surgeon can selectively rotate the cup cages 110, 210 to selectively position the mounting flange 114 of the outer cup cage 110 on the patient's ilium and the mounting flange 214 of the inner cup cage 210 on the patient's ischium.

[0056] After the mounting flanges 114, 214 have been properly positioned in block 908, the cup cage 110, 210 may be secured to the patient's hip bone in block 914. To this end, in block 916, the mounting flange 114 of the outer cup cage 110 may be secured to the patient's ilium (or other portion of the patient's hip bone 150) using the mounting apertures 126 and a suitable fixation device (such as a bone screw). In some embodiments, a plurality of apertures 126 and associated fixation devices may be used to attach the flange 114. Similarly, in block 918, the mounting flange 214 of the inner cup cage 210 may be secured to the patient's ischium (or other portion of the patient's hip bone 150) using the mounting apertures 126 and a suitable fixation device (e.g., a bone screw). Additionally, in some embodiments, in block 920, the hemispherical cup 112, 212 of the cup cage 110, 210 may be secured to the patient's acetabulum. For example, the hemispherical cups 112, 212 may be fixed via one or more combinations of mounting apertures 124, 224 and associated fixation devices (such as bone screws). It should be understood that not every mounting aperture 124 of the hemispherical cup 112 may be aligned with a corresponding mounting aperture 224 of the hemispherical cup 212 at a particular relative orientation of the hemispherical cups 112, 212. In other embodiments, as described below, the hemispherical cups 112, 212 may be fixed to the patient's acetabulum using bone cement. In such embodiments, the mounting apertures 124, 224 may be used as conduits to drain bone cement onto the hemispherical cups 112, 212, and subsequently onto the acetabular cup 104 to secure all three components of the acetabular prosthesis 100 to the patient's acetabulum.

[0057] After the inner cup cage 110 and the outer cup cage 210 have been secured to the patient's hip bone in block 914, the method 900 proceeds to block 922, where the Fig.14 As shown, the acetabular cup 104 is inserted into the hemispherical cup 212 of the inner cup cage 210. In block 924, the acetabular cup 104 is secured to the inner cup cage 210 and the patient's acetabulum. For example, as described above, the acetabular cup 104 may be secured using bone cement, which secures each of the hemispherical cups 112, 212 and the acetabular cup 104 to the patient's acetabulum.

[0058] The multiple features of the methods, devices, and systems described herein provide the present disclosure with multiple advantages. It should be noted that alternative embodiments of the methods, devices, and systems of the present disclosure may not include all of the features described, but may still benefit from at least some of the advantages of such features. For the above-mentioned methods, devices, and systems, a person of ordinary skill in the art can easily conceive of his own implementation, which can combine one or more of the features of the present invention and fall within the spirit and scope of the present disclosure defined by the appended claims.

[0059] The present invention is further defined by the following aspects:

[0060] 1. An acetabular prosthesis for use in hip arthroplasty surgery, the acetabular prosthesis comprising:

[0061] an outer cup cage having a first hemispherical cup and a first mounting flange extending from an edge of the first hemispherical cup; and

[0062] an inner cup cage having a second hemispherical cup and a second mounting flange extending from an edge of the second hemispherical cup, wherein the second hemispherical cup is sized to nest within the first hemispherical cup,

[0063] Wherein, when the second hemispherical cup is nested within the first hemispherical cup, each of the inner cup cage and the outer cup cage can be rotated relative to each other about an axis extending through an apex of each of the first hemispherical cup and the second hemispherical cup to selectively position the first mounting flange and the second mounting flange.

[0064] 2. The acetabular prosthesis of aspect 1, wherein the first mounting flange comprises an iliac mounting flange having a first mounting aperture and configured to be secured to an ilium of a patient's hip via the first mounting aperture, and

[0065] Wherein the second mounting flange comprises a ischium mounting flange having a second mounting aperture and configured to be secured to a ischium of a hip of the patient via the second mounting aperture.

[0066] 3. The acetabular prosthesis of aspect 1, wherein the first mounting flange has a surface area that is greater than a surface area of ​​the second mounting flange.

[0067] 4. The acetabular prosthesis of aspect 1, wherein the first mounting flange and the second mounting flange are malleable to allow the shapes of the first mounting flange and the second mounting flange to deform.

[0068] 5. The acetabular prosthesis of aspect 1, wherein at least one of the first hemispherical cup and the second hemispherical cup is hemi-hemispherical.

[0069] 6. The acetabular prosthesis of aspect 1, wherein a diameter of the first hemispherical cup is greater than a diameter of the second hemispherical cup.

[0070] 7. An acetabular prosthesis according to aspect 1, wherein each of the first hemispherical cup and the second hemispherical cup includes a plurality of mounting holes defined therethrough, and wherein each of the inner cup cage and the outer cup cage is rotatable to align at least one mounting hole of the first hemispherical cup with at least one mounting hole of the second hemispherical cup.

[0071] 8. The acetabular prosthesis of aspect 1, wherein the first hemispherical cup comprises an inner concave surface and an outer convex surface, and wherein an edge of the first hemispherical cup extends from the inner concave surface to the outer convex surface of the first hemispherical cup, and

[0072] wherein the second hemispherical cup comprises an inner concave surface and an outer convex surface, and

[0073] Wherein the edge of the second hemispherical cup extends from the inner concave surface to the outer convex surface of the second hemispherical cup.

[0074] 9. The acetabular prosthesis of aspect 1, wherein the first hemispherical cup of the outer cup cage comprises an elongated track, and the second hemispherical cup comprises a guide tab received in the elongated track,

[0075] Wherein, when the inner cup cage and the outer cup cage rotate about the axis, the guide tab of the second hemispherical cup moves within the elongated track of the first hemispherical cup.

[0076] 10. The acetabular prosthesis of aspect 9, wherein the elongated track includes an elongated opening, and wherein the guide tab of the second hemispherical cup is insertable into the elongated opening when the second hemispherical cup is nested into the first hemispherical cup.

[0077] 11. The acetabular prosthesis of aspect 9, wherein the guide tab is captured within an elongated track such that the inner cup cage is secured to the outer cup cage.

[0078] 12. A method of performing orthopedic surgery on a patient's hip, the method comprising:

[0079] inserting an outer cup cage of an acetabular prosthesis into the acetabulum of the patient, the outer cup cage comprising a first hemispherical cup and a first mounting flange extending from an edge of the first hemispherical cup;

[0080] inserting an inner cup cage of the acetabular prosthesis into the outer cup cage, wherein the inner cup cage includes a second hemispherical cup and a second mounting flange extending from an edge of the second hemispherical cup, and wherein inserting the inner cup cage includes nesting the second hemispherical cup into the first hemispherical cup; rotating at least one of the inner cup cage and the outer cup cage relative to each other about an axis extending through an apex of each of the first hemispherical cup and the second hemispherical cup while the second hemispherical cup is nested in the first hemispherical cup to position the first mounting flange and the second mounting flange in corresponding desired positions; and

[0081] The first mounting flange and the second mounting flange are secured to the patient's hip bone.

[0082] 13. The method of aspect 12, further comprising securing the first hemispherical cup and the second hemispherical cup to the acetabulum of the patient.

[0083] 14. The method of aspect 12, further comprising inserting an acetabular cup prosthesis into the second hemispherical cup of the inner cup cage.

[0084] 15. The method of aspect 14, further comprising securing the first and second hemispherical cups and the acetabular cup prosthesis to the acetabulum of the patient using bone cement.

[0085] 16. The method of aspect 12, wherein inserting the inner cup cage into the outer cup cage comprises inserting a guide tab of the second hemispherical cup of the inner cup cage into an elongated track of the first hemispherical cup of the outer cup cage.

[0086] 17. The method of aspect 16, wherein rotating at least one of the inner cup cage holder and the outer cup cage holder relative to each other comprises moving the guide tab within the elongated track.

[0087] 18. The method of aspect 12, wherein the first mounting flange comprises an ilium mounting flange, and wherein the second mounting flange comprises an ischium mounting flange, and

[0088] Wherein rotating at least one of the inner cup cage and the outer cup cage relative to each other includes positioning the ilium mounting flange on the ilium of the hip of the patient and positioning the ischium mounting flange on the ischium of the hip of the patient.

[0089] 19. An acetabular prosthesis for use in hip arthroplasty surgery, the acetabular prosthesis comprising:

[0090] an outer cup cage having a first hemi-hemispherical cup and an ilium mounting flange extending from an edge of the first hemi-hemispherical cup; and

[0091] an inner cup cage having a second hemi-hemispherical cup and a ischium extending from an edge of the second hemi-hemispherical cup, wherein the second hemi-hemispherical cup has an outer diameter that is smaller than an inner diameter of the first hemi-hemispherical cup, which allows the second hemi-hemispherical cup to be received within the first hemi-hemispherical cup; and

[0092] an acetabular cup prosthesis having an outer diameter smaller than an inner diameter of the second semi-hemispherical cup, which allows the acetabular cup prosthesis to be received in the second semi-hemispherical cup,

[0093] Wherein, when the second hemi-hemispherical cup is received within the first hemi-hemispherical cup, each of the inner cup cage and the outer cup cage can be rotated relative to each other to independently position the ilium flange and the ischium flange.

[0094] 20. The acetabular prosthesis of aspect 19, wherein the first semi-hemispherical cup of the outer cup cage comprises an elongated track, and the second semi-hemispherical cup comprises a guide tab receivable in the elongated track,

[0095] wherein the guide tab of the second semi-hemispherical cup moves within the elongated track of the first semi-hemispherical cup when the inner cup cage and the outer cup cage rotate about the axis.

Claims

1. An acetabular prosthesis, comprising: an outer cup cage having a first hemispherical cup and a first mounting flange extending from an edge of the first hemispherical cup; and an inner cup cage having a second hemispherical cup and a second mounting flange extending from an edge of the second hemispherical cup, wherein the second hemispherical cup is sized to nest within the first hemispherical cup, Wherein, when the second hemispherical cup is nested within the first hemispherical cup, each of the inner cup cage and the outer cup cage can be rotated relative to each other about an axis extending through an apex of each of the first hemispherical cup and the second hemispherical cup to selectively position the first mounting flange and the second mounting flange.

2. The acetabular prosthesis according to claim 1, wherein: The first mounting flange includes an ilium mounting flange having a first mounting aperture and configured to be secured to an ilium of a patient's hip via the first mounting aperture, and Wherein the second mounting flange comprises a ischium mounting flange having a second mounting aperture and configured to be secured to a ischium of a hip of the patient via the second mounting aperture.

3. The acetabular prosthesis according to any one of claims 1 or 2, wherein: The first mounting flange has a surface area greater than a surface area of ​​the second mounting flange.

4. An acetabular prosthesis according to any preceding claim, wherein: The first mounting flange and the second mounting flange are malleable to allow the shapes of the first mounting flange and the second mounting flange to deform.

5. An acetabular prosthesis according to any preceding claim, wherein: At least one of the first hemispherical cup and the second hemispherical cup is semi-hemispherical.

6. An acetabular prosthesis according to any preceding claim, wherein: The diameter of the first hemispherical cup is greater than the diameter of the second hemispherical cup.

7. An acetabular prosthesis according to any preceding claim, wherein: Each of the first hemispherical cup and the second hemispherical cup includes a plurality of mounting holes defined therethrough, and wherein each of the inner cup cage and the outer cup cage is rotatable to align at least one mounting hole of the first hemispherical cup with at least one mounting hole of the second hemispherical cup.

8. An acetabular prosthesis according to any preceding claim, wherein: The first hemispherical cup includes an inner concave surface and an outer convex surface, and wherein the edge of the first hemispherical cup extends from the inner concave surface of the first hemispherical cup to the outer convex surface, and Wherein the second hemispherical cup comprises an inner concave surface and an outer convex surface, and wherein the edge of the second hemispherical cup extends from the inner concave surface of the second hemispherical cup to the outer convex surface.

9. An acetabular prosthesis according to any preceding claim, wherein: The first hemispherical cup of the outer cup cage includes an elongated track and the second hemispherical cup includes a guide tab received in the elongated track, Wherein, when the inner cup cage and the outer cup cage rotate about the axis, the guide tab of the second hemispherical cup moves within the elongated track of the first hemispherical cup.

10. The acetabular prosthesis according to claim 9, wherein: The elongated track includes an elongated opening, and wherein the guide tab of the second hemispherical cup is insertable into the elongated opening when the second hemispherical cup is nested into the first hemispherical cup.

11. The acetabular prosthesis according to claim 9 or 10, wherein: The guide tab is captured within the elongated track such that the inner cup cage holder is secured to the outer cup cage holder.

12. An acetabular prosthesis according to any one of claims 1 to 11, which is suitable for use in or during a hip arthroplasty surgery.

13. A method of performing orthopedic surgery on a patient's hip, the method comprising: inserting an outer cup cage of an acetabular prosthesis into the acetabulum of the patient, the outer cup cage comprising a first hemispherical cup and a first mounting flange extending from an edge of the first hemispherical cup; inserting an inner cup cage of the acetabular prosthesis into the outer cup cage, wherein the inner cup cage includes a second hemispherical cup and a second mounting flange extending from an edge of the second hemispherical cup, and wherein inserting the inner cup cage includes nesting the second hemispherical cup into the first hemispherical cup; rotating at least one of the inner cup cage and the outer cup cage relative to each other about an axis extending through an apex of each of the first hemispherical cup and the second hemispherical cup while the second hemispherical cup is nested within the first hemispherical cup to position the first mounting flange and the second mounting flange in corresponding desired positions; as well as The first mounting flange and the second mounting flange are secured to the patient's hip bone.

14. The method of claim 13, further comprising securing the first and second hemispherical cups to the acetabulum of the patient.

15. The method of claim 13 or 14, further comprising inserting an acetabular cup prosthesis into the second hemispherical cup of the inner cup cage.

16. The method of claim 15, further comprising securing the first and second hemispherical cups and the acetabular cup prosthesis to the acetabulum of the patient using bone cement.

17. The method according to any one of claims 13 to 16, wherein: Inserting the inner cup cage into the outer cup cage includes inserting a guide tab of the second hemispherical cup of the inner cup cage into an elongated track of the first hemispherical cup of the outer cup cage.

18. The method according to claim 17, wherein: Rotating at least one of the inner cup cage holder and the outer cup cage holder relative to each other includes moving the guide tab within the elongated track.

19. The method according to any one of claims 13 to 18, wherein: The first mounting flange comprises an ilium mounting flange, and wherein the second mounting flange comprises a ischium mounting flange, and Wherein rotating at least one of the inner cup cage and the outer cup cage relative to each other includes positioning the ilium mounting flange on the ilium of the hip of the patient and positioning the ischium mounting flange on the ischium of the hip of the patient.

20. The acetabular prosthesis according to any one of claims 1 to 11, comprising: an outer cup cage having a first hemi-hemispherical cup and an ilium mounting flange extending from an edge of the first hemi-hemispherical cup; and an inner cup cage having a second hemi-hemispherical cup and a ischium extending from an edge of the second hemi-hemispherical cup, wherein the second hemi-hemispherical cup has an outer diameter that is smaller than an inner diameter of the first hemi-hemispherical cup, which allows the second hemi-hemispherical cup to be received within the first hemi-hemispherical cup; and an acetabular cup prosthesis having an outer diameter smaller than an inner diameter of the second semi-hemispherical cup, which allows the acetabular cup prosthesis to be received in the second semi-hemispherical cup, Wherein, when the second hemi-hemispherical cup is received within the first hemi-hemispherical cup, each of the inner cup cage and the outer cup cage can be rotated relative to each other to independently position the ilium flange and the ischium flange.

21. The acetabular prosthesis according to claim 20, wherein: The first semi-hemispherical cup of the outer cup cage includes an elongated track, and the second semi-hemispherical cup includes a guide tab receivable in the elongated track, wherein the guide tab of the second semi-hemispherical cup moves within the elongated track of the first semi-hemispherical cup when the inner cup cage and the outer cup cage rotate about the axis.

22. An acetabular prosthesis according to claim 20 or 21, adapted for use in or during hip arthroplasty surgery.

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