Acetabular prosthesis with adjustable acetabular cup cage - Patents.com

Abstract

An acetabular prosthesis for use in hip arthroplasty includes an acetabular cup-cage assembly including a lateral cup-cage and a medial cup-cage. The lateral cup-cage includes a semi-spherical cup and a mounting flange. Similarly, the medial cup-cage includes a semi-spherical cup and a corresponding mounting flange. The semi-spherical cup of the medial cup-cage is sized to be received within the semi-spherical cup of the lateral cup-cage, and the two cup-cages are rotatable relative to one another to position the mounting flange at a desired location on the patient's hip bone.

Description

[Technical field]

[0001] (Related Applications) This application claims priority to U.S. Patent Application No. 17 / 740,813, filed May 10, 2022, which is incorporated by reference in its entirety.

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

[0003] Arthroplasty is a well-known surgical procedure in which diseased and / or damaged natural joints are replaced with artificial joints. Typical artificial joints include hip, knee, shoulder, ankle, and wrist, among others. In hip arthroplasty, for example, at least a portion of the ball and socket joint of a patient's hip joint is replaced with one or more corresponding prosthetic components. In such a procedure, the socket portion of the joint, known as the acetabulum, may be replaced with one or more acetabular prosthetic components (e.g., an acetabular cup or shell that fits within the acetabulum and a liner that fits within the acetabular cup to function as a bearing surface). Similarly, the ball portion of the joint, known as the femoral head, may be replaced with a femoral head prosthetic component.

[0004] In some hip arthroplasties, a standard acetabular prosthesis, including an acetabular cup and associated cup liner, may be further augmented with additional acetabular prosthetic components. For example, in surgical cases where the patient has significant bone loss in the region of the acetabulum, and / or in some revision procedures, an acetabular cup cage may be used to improve fixation of the acetabular cup. A typical acetabular cup cage includes a hemispherical cup that receives the acetabular cup and a fixed mounting flange that secures the hemispherical cup to the patient's hip bone (i.e., the bony anatomy surrounding the acetabulum of the patient's hip joint). However, due to the fixed orientation of the mounting flange and the varying geometries of the patient's hip bones, it may be difficult for an orthopedic surgeon to properly orient a typical acetabular cup cage to achieve the desired fixation on the patient's bony anatomy. Summary of the Invention [Means for solving the problem]

[0005] According to an aspect of the present disclosure, an acetabular prosthesis for use in hip arthroplasty 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 a rim of the first hemispherical cup. The inner cup cage includes a second hemispherical cup and a second mounting flange extending from a rim of the second hemispherical cup. The second hemispherical cup may be sized to nest within the first hemispherical cup. Additionally, when the second hemispherical cup is nested within the first hemispherical cup, each of the inner cup cage and the outer cup cage are rotatable relative to one another 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.

[0006] In some embodiments, the first mounting flange may be embodied as an iliac mounting flange having a first mounting aperture and configured to be secured to an ilium of the patient's hip joint via the first mounting aperture. Additionally, in some embodiments, the second mounting flange may be embodied as an ischial mounting flange having a second mounting aperture and configured to be secured to an ischial of the patient's hip joint via the second mounting aperture. Additionally, in some embodiments, the first mounting flange may have a surface area that is greater than a surface area of ​​the second mounting flange. The first mounting flange and the second mounting flange may also be malleable to allow for deformation of the shape of the first mounting flange and the second mounting flange.

[0007] Additionally, in some embodiments, at least one of the first and second hemispherical cups is hemispherical. In some embodiments, the first hemispherical cup has a diameter greater than a diameter of the second hemispherical cup. Additionally, in some embodiments, each of the first and second hemispherical cups includes a plurality of mounting holes defined therethrough. In such embodiments, each of the inner and outer cup cages 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 rim of the first hemispherical cup extends from the inner concave surface to the outer convex surface of the first hemispherical cup. Additionally, in some embodiments, the second hemispherical cup includes an inner concave surface and an outer convex surface. In such embodiments, the rim of the second hemispherical cup extends from the inner concave surface to the outer convex surface of the second hemispherical cup.

[0009] Additionally, 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 within the elongated track. When the inner cup cage and the outer cup cage are rotated about an 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 the guide tab of the second hemispherical cup may be insertable into the elongated opening when the second hemispherical cup is nested within the first hemispherical cup. Additionally, in some embodiments, the guide tab may be captured within the elongated track such that the inner cup cage is secured to the outer cup cage.

[0010] According to another aspect of the disclosure, a method of performing an orthopaedic surgical procedure on a patient's hip joint 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 a rim of the first hemispherical cup. Similarly, the inner cup cage may include a second hemispherical cup and a second mounting flange extending from a rim of the second hemispherical cup. In some embodiments, inserting the inner cup cage may include nesting the second hemispherical cup within 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 one another about an axis extending through an apex of each of the first and second hemispherical cups while the second hemispherical cup is nested within the first hemispherical cup to position the first and second mounting flanges in corresponding desired positions, and securing the first and second mounting flanges to the patient's hip bone.

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

[0012] In some embodiments, inserting the inner cup cage into the outer cup cage may include inserting a guide tab of a second hemispherical cup of the inner cup cage into an elongated track of a first hemispherical cup of the outer cup cage. In such embodiments, rotating at least one of the inner cup cage and the outer cup cage relative to one another 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 an ischium mounting flange. In such embodiments, rotating at least one of the inner and outer cup cages relative to one another may include positioning the ilium mounting flange on the ilium of the patient's hip joint and positioning the ischium mounting flange on the ischium of the patient's hip joint.

[0014] According to a further aspect of the present disclosure, an acetabular prosthesis for use in hip arthroplasty includes an outer cup cage, an inner cup cage, and an acetabular cup prosthesis. The outer cup cage includes a first hemispherical cup and an iliac attachment flange extending from a rim of the first hemispherical cup. The inner cup cage includes a second hemispherical cup and an ischial portion extending from a rim of the second hemispherical cup. Further, the second hemispherical cup has an outer diameter smaller than an inner diameter of the first hemispherical cup, allowing the second hemispherical cup to be received within the first hemispherical cup.

[0015] The acetabular cup prosthesis includes an outer diameter that is smaller than an inner diameter of the second hemispherical cup that enables the acetabular cup prosthesis to be received within the second hemispherical cup. Additionally, when the second hemispherical cup is received within the first hemispherical cup, each of the inner and outer cup cages are rotatable relative to one another to independently position the iliac and ischial flanges.

[0016] In some embodiments, the first hemispherical cup of the outer cup cage includes an elongated track and the second hemispherical cup includes a guide tab that is receivable within the elongated track. In such embodiments, when the inner cup cage and the outer cup cage are rotated about an axis, the guide tab of the second hemispherical cup moves within the elongated track of the first hemispherical cup. [Brief description of the drawings]

[0017] The detailed description makes specific reference to the following drawings: [Figure 1] 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 joint. [Diagram 2] FIG. 2 is an exploded perspective view of one embodiment of the acetabular prosthesis of FIG. 1. [Diagram 3] FIG. 3 is a top view of an outer cup cage of the acetabular cup cage assembly of FIG. 2. [Figure 4] FIG. 3 is a top view of the inner cup cage of the acetabular cup cage assembly of FIG. 2. [Diagram 5] 2 is a top view of the acetabular cup cage assembly of FIG. 1 showing the inner cup cage received within the outer cup cage with the inner cup cage flange disposed in an initial position. [Figure 6] FIG. 6 is a top view of the acetabular cup cage assembly of FIG. 5 showing the inner cup cage rotated relative to the outer cup cage with the inner cup cage flange positioned in a new position. [Figure 7]2 is a top view of another embodiment of the acetabular cup cage assembly of the acetabular prosthesis of FIG. 1 , wherein the outer cup cage includes an elongated track and the inner cup cage includes guide tabs that are received in the elongated track of the outer cup cage. [Figure 8] FIG. 8 is a side view of the acetabular cup cage assembly of FIG. [Figure 9] 2 is a simplified flow diagram of a method of implanting the acetabular prosthesis of FIG. 1. [Figure 10] 10 is a simplified diagram of a patient's hip bone during the acetabular reaming procedure of the method of FIG. [Figure 11] 10 is a perspective view of the acetabular prosthesis of FIG. 1 being implanted in a patient's hip bone during the performance of the method of FIG. 9. [Figure 12] 10 is a perspective view of the acetabular prosthesis of FIG. 1 being implanted in a patient's hip bone with the inner cup cage rotated to an initial position during the method of FIG. 9. [Figure 13] 13 is a perspective view of the acetabular prosthesis of FIG. 12 with the inner cup cage rotated to a new position to reposition the flange of the inner cup cage to a desired location on the patient's hip bone during the method of FIG. 9 . [Figure 14] 10 is a perspective view of the acetabular prosthesis of FIG. 1 implanted in a patient's hip bone with the femoral component inserted into the acetabular cup of the acetabular prosthesis during the method of FIG. 9. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] While the concepts of the present disclosure are susceptible to various modifications and alternative forms, specific illustrative embodiments thereof have been shown by way of example in the drawings and are herein described in detail, it being understood, however, that it is not intended to limit the concepts of the present disclosure to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

[0019] Terms denoting anatomical references, such as anterior, posterior, medial, lateral, superior, inferior, etc., may be used throughout this specification with reference to the orthopedic implants and surgical instruments described herein, as well as the patient's native anatomy. Such terms have well-understood meanings both in the study of anatomy and in the field of orthopedic surgery. Use of such anatomical reference terms in the written description and claims is intended to be consistent with their well-understood meanings, unless otherwise specified.

[0020] References herein to "one embodiment," "embodiment," "exemplary embodiment," and the like indicate that the embodiment being described may include a particular element, structure, or feature, but not all embodiments necessarily include that particular element, structure, or feature. Moreover, such phrases do not necessarily refer to the same embodiment. Moreover, when a particular element, structure, or feature is described in connection with an embodiment, it is believed to be within the knowledge of one of ordinary skill in the art to implement such element, structure, or feature in connection with other embodiments, whether or not expressly stated. Additionally, it should be understood that an item listed in the format "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 format "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).

[0021] In the figures, some structural or method elements may be shown in a particular arrangement and / or order. However, it should be recognized that such a particular arrangement and / or order may not be required. Rather, in some embodiments, such elements may be arranged in a different form and / or order than that shown in the illustrations. Additionally, the inclusion of a structural or method element in a particular figure does not imply that such element is required in all embodiments, and in some embodiments may not be included or may be combined with other elements.

[0022] 1, an exemplary acetabular prosthesis 100 includes an acetabular cup-cage assembly 102 and an acetabular cup 104, each of which is configured for implantation within the acetabulum of a patient's hip bone 150 during the performance of a corresponding orthopaedic surgical procedure. As described in more detail below, the acetabular cup-cage assembly 102 provides additional support for and fixation to the patient's hip bone, and may be used in a variety of situations, including when the patient's hip bone 150 has significant bone loss or deterioration. Additionally, as described in more detail below, the acetabular cup-cage assembly 102 is adjustable to modify the mounting position of the acetabular cup-cage assembly 102, thereby compensating for the particular geometry and / or bone loss of the patient's hip bone (e.g., the geometry of the patient's acetabulum, ilium, and ischium).

[0023] 2, 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 one another and independently movable as described in more detail below. In addition, the inner cup cage 210 is configured to be nested or otherwise received within the outer cup cage 110, as discussed further below. Similarly, the acetabular cup 104 is configured to be received within the inner cup cage 210. The acetabular cup 104, inner cup cage 210, and outer cup cage 110 may be secured to the patient's acetabulum, and the inner and outer cup cages 110, 210 may also be secured to surrounding bony regions, such as the patient's ilium and ischium, as described below.

[0024] The outer cup cage 110 includes a hemispherical cup 112 and a mounting flange 114 extending from a rim 116 of the hemispherical cup 112. Similarly, the inner cup cage 210 includes a hemispherical cup 212 and a mounting flange 214 extending from a rim 216 of the hemispherical cup 212. As described below, the hemispherical cup 212 of the inner cup cage 210 is shaped and sized to be received within the hemispherical cup 112 of the outer cup cage 110 such that the inner cup cage 210 can be nested within the outer cup cage 110 as shown in FIG. 1. It should be understood that as used herein, the term "semispherical" is intended to be a broad term that includes hemispherical, semi-hemispherical, and other geometric shapes that resemble a hemisphere but do not necessarily define a complete hemisphere. For example, the exemplary hemispherical cups 112, 212 are semi-hemispherical as shown in FIG. 2 and are approximately one-quarter of a sphere. However, in other embodiments, the hemispherical cup 112, 212 may have a perfect hemisphere, or a shape between a perfect hemisphere and a perfect hemisphere.

[0025] As best shown in FIGS. 2 and 3, 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 may, in some implementations, 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. Additionally, 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, the mounting aperture(s) 124 may be used to secure the hemispherical cup 112 to the patient's acetabulum using associated fixation devices (e.g., bone screws), bone cement, and / or other fixation mechanisms, as described below.

[0026] As mentioned above, the flange 114 extends from the rim 116 of the semi-spherical cup 112. The flange 114 is configured to be attached to the ilium of the patient's hip bone 150 (or other portion of the patient's hip bone 150) and illustratively is larger than the flange 214 of the semi-spherical cup 212 of the inner cup cage 210 (i.e., the illustrative flange 114 has a larger surface area than the flange 214). However, in other embodiments, the flange 114 and the flange 214 may be of a similar size and / or shape.

[0027] To facilitate attachment of the flange 114 to the patient's ilium, the flange 114 includes one or more attachment apertures 126 that extend completely through the flange 114. Illustratively, the flange 114 includes multiple apertures 126, although in other embodiments, the flange 114 may include only a single attachment aperture. As described in more detail below, the attachment apertures 126 may be used to secure the flange 114 to the patient's ilium (or other region of the patient's hip bone 150) using a suitable fixation device, such as a bone screw.

[0028] 2 and 4, 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. A rim 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. The rim 216 of the hemispherical cup 112 may be configured to contact and be supported by the rim 116 of the hemispherical cup 212 when the hemispherical cup 212 is nested within the hemispherical cup 112 of the outer cup cage 110.

[0029] 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 an amount of resistance to relative movement between the hemispherical cups 112, 212. In this manner, as described in more detail below, the orthopaedic surgeon may rotate the hemispherical cup 112, 212 to a desired position that is maintained at least in part by the "locking" nature of the outer surface 220 and the inner surface 118 of the hemispherical cup 212. However, in other embodiments, the outer surface 220 of the hemispherical cup 212 and the inner surface 118 of the hemispherical cup 212 may be relatively smooth, facilitating relative movement between the hemispherical cups 112, 212.

[0030] 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 aperture(s) 224 may be used to secure the hemispherical cup 212 to the patient's acetabulum using an associated fixation device (e.g., bone screw), bone cement, and / or other fixation mechanism. To do so, an orthopaedic surgeon may fully or partially align one or more of the mounting apertures 224 of the hemispherical cup 212 of the inner cup cage 210 with the corresponding mounting aperture 124 of the hemispherical cup 112 of the outer cup cage 110, as discussed in more detail below.

[0031] As mentioned above, the flange 214 extends from the rim 216 of the semi-spherical cup 212. The flange 214 is configured to be attached to the ischium of the patient's hip bone 150 and illustratively is smaller than the flange 114 of the semi-spherical cup 112 of the outer cup cage 110 (i.e., the illustrative 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 illustrative flange 214 includes a single mounting aperture 226, in other embodiments, the flange 214 may include additional mounting apertures 226. As described in more detail below, the mounting aperture 226 may be used to secure the flange 214 to the patient's ischium (or other region of the patient's hip bone 150) using a suitable fastening device, such as a bone screw.

[0032] The outer cup cage 110 and the inner cup cage 210 may be formed from any material capable of providing support and fixation for the acetabular cup 104. Illustratively, the cup cage 110, 210 is formed from a surgical metal material or an alloy such as a titanium alloy. Illustratively, the cup cage 110, 210 is formed from a material and / or has a thickness that allows the flange 114, 214 to be malleable by hand so that an orthopaedic surgeon can modify the shape of the flange 114, 214 to fit the natural geometry of the patient's hip bone. However, in other embodiments, the cup cage 110, 210 may be made from a more rigid material. Additionally, in some embodiments, the outer cup cage 110 and the inner cup cage 210 may be fabricated via a three-dimensional printing process.

[0033] 5 and 6, as discussed above, the hemispherical cup 212 of the inner cup cage 210 is shaped, sized and configured to be nested within the hemispherical cup 112 of the outer cup cage 210. That is, the hemispherical cup 212 has an outer diameter 230 (i.e., diametric distance measured between the outer surfaces 220 of the hemispherical cup 212) that is slightly smaller than the inner diameter 130 of the hemispherical cup 112 (i.e., diametric distance measured between the inner surfaces 118 of the hemispherical cup 112), such that the hemispherical cup 212 is received within the hemispherical cup 112.

[0034] As mentioned above, the outer cup cage 110 and the inner cup cage 210 are separate components in the exemplary embodiment, thereby allowing for relative movement between the cup cages 110, 210. That is, when the semi-spherical cup 212 of the inner cup cage 210 is received, such as by telescoping, within the semi-spherical cup 112 of the outer cup cage 110, as shown in FIG. 5, the two cup cages 110, 210 may be rotated relative to one another about an axis 170 (see FIG. 2) that extends through the apex 132 (see FIG. 3) of the semi-spherical cup 112 and the apex 232 (see FIG. 4) of the semi-spherical cup 212. Thus, an orthopaedic surgeon may selectively position the flanges 114, 214 to accommodate the particular geometry of a patient's hip bone. For example, as shown by comparing Figures 5 and 6, the orthopaedic surgeon can selectively rotate the inner cup cage 110 and / or the outer cup cage 210 relative to one another about axis 170 to achieve a desired positioning as indicated by arrow 500. In this manner, the orthopaedic 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.

[0035] In some embodiments, the outer cup cage 110 and the inner cup cage 210 may be attached, such as by coupling, together while still facilitating relative rotation or movement of the cup cages 110, 210. For example, as shown in Figures 7 and 8, in some embodiments, the outer cup cage 110 may include an elongated track or opening 700 and the inner cup cage 210 may include a guide tab 800. The exemplary elongated track 700 is embodied as a closed track defined completely through the semi-spherical cup 112 and extending from the inner surface 118 to the outer surface 120. The elongated track 700 also extends along a circumferential arc of the semi-spherical cup 112, which allows the cup cages 110, 210 to rotate about the axis 170. The guide tab 800 of the inner cup cage 210 is received within the elongated track 700 and moves within the elongated track 700 as the cup cages 110, 210 are rotated relative to one another.

[0036] In some embodiments, the inner cup cage 210 may also include an elongated track or opening 802 that extends through the hemispherical cup 212 along an arc of the circumference of the hemispherical cup 212. In such embodiments, the elongated tracks 700, 802 may partially coincide with one another when the hemispherical cup 212 is received within the hemispherical cup 112, thereby allowing the elongated tracks 700, 802 to be used as attachment openings for securing the hemispherical cup 112, 212 to the patient's acetabulum (e.g., via bone screws or bone cement).

[0037] In an exemplary embodiment, the guide tabs 800 of the inner cup cage 210 are configured to be inserted or otherwise received within the elongated track 700 when the inner cup cage 210 is nested within the outer cup cage 110. Similarly, the guide tabs 800 may be removed from the elongated track 700 when the inner cup cage 210 is removed from the outer cup cage 110. Alternatively, in other embodiments, the guide tabs 800 are captured within the elongated track 700 such that the inner cup cage 210 and the outer cup cage 110 are attached or fixed to one another. In such embodiments, the inner cup cage and the outer cup cage 210 may or may not be separable from one another.

[0038] 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, as shown in FIG. 10, the orthopaedic surgeon may ream the patient's acetabulum using a reamer 1000 to prepare the acetabulum to receive the acetabular prosthesis 100.

[0039] After the patient's hip bone 150 is prepared in block 902, the method 900 proceeds to block 904. In block 904, the orthopaedic surgeon inserts the outer cup cage 110 into the patient's surgically-prepared acetabulum. In addition, in block 906, the orthopaedic surgeon nests the inner cup cage 210 into the outer cup cage 110. To do so, the orthopaedic surgeon inserts the hemispherical cup 212 of the inner cup cage 210 into the hemispherical cup 112 of the outer cup cage 110, as shown in FIG.

[0040] At block 908, the orthopaedic surgeon positions the mounting flange 114 of the outer cup cage 110 and the mounting flange 214 of the inner cup cage 210. To do so, as shown in blocks 910 and 912, the orthopaedic 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 axis 170 (see FIG. 11 ). For example, as shown in the comparison between FIGS. 12 and 13 , the orthopaedic surgeon may 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.

[0041] After the mounting flanges 114, 214 are properly positioned at block 908, the cup cages 110, 210 may be secured to the patient's hip bone at block 914. To do so, the mounting flanges 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) at block 916 using the mounting apertures 126 and a suitable fastening device, such as a bone screw. In some embodiments, the mounting flanges 114 may be secured using multiple apertures 126 and associated fastening devices. Similarly, the mounting flanges 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) at block 918 using the mounting apertures 126 and a suitable fastening device (e.g., a bone screw). Additionally, in some embodiments, the hemispherical cups 112, 212 of the cup cages 110, 210 may be secured to the patient's acetabulum at block 920. For example, the hemispherical cups 112, 212 may be secured via one or more combinations of mounting apertures 124, 224 and associated fixation devices, such as bone screws. It should be understood that in a particular relative orientation of the hemispherical cups 112, 212, not all mounting apertures 124 of the hemispherical cup 112 may be aligned with the corresponding mounting apertures 224 of the hemispherical cup 212. In other embodiments, as described below, the hemispherical cups 112, 212 may be secured to the patient's acetabulum using bone cement. In such embodiments, the mounting apertures 124, 224 may function as conduits for flowing bone cement into the hemispherical cups 112, 212 and then into the acetabular cup 104 to secure all three components of the acetabular prosthesis 100 to the patient's acetabulum.

[0042] After the inner cup cage 110 and the outer cup cage 210 are secured to the patient's hip bone at block 914, the method 900 proceeds to block 922 where the acetabular cup 104 is inserted into the hemispherical cup 212 of the inner cup cage 210, as shown in FIGURE 14. At 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.

[0043] The present disclosure has multiple advantages based on various features of the methods, devices, and systems described herein. It is noted that alternative embodiments of the methods, devices, and systems of the present disclosure do not include all of the features described, but still benefit from at least some of the advantages of such features. Those skilled in the art can easily implement their own methods, devices, and systems that incorporate one or more of the features of the present invention and are within the spirit and scope of the present disclosure as defined in the appended claims.

[0044] The invention is further defined in the following aspects. 1. An acetabular prosthesis for use in hip arthroplasty, the acetabular prosthesis comprising: an outer cup cage having a first hemispherical cup and a first mounting flange extending from a rim of the first hemispherical cup; an inner cup cage having a second hemispherical cup and a second mounting flange extending from a rim of the second hemispherical cup; Equipped with the second hemispherical cup is sized to nest within the first hemispherical cup; When the second hemispherical cup is nested within the first hemispherical cup, each of the inner cup cage and the outer cup cage are rotatable relative to one another about an axis extending through the apex of each of the first and second hemispherical cups to selectively position the first and second mounting flanges of the acetabular prosthesis. 2. The first mounting flange comprises an iliac mounting flange having a first mounting opening and configured to be secured to an ilium of a patient's hip joint through the first mounting opening; The second mounting flange has a second mounting opening; and an ischial mounting flange configured to be secured to an ischial bone of the patient's hip joint via the second mounting opening. 3. The acetabular prosthesis of aspect 1, wherein the first mounting flange has a surface area greater than a surface area of ​​the second mounting flange. 4. The acetabular prosthesis of aspect 1, wherein the first mounting flange and the second mounting flange are malleable to permit deformation of the shape of the first mounting flange and the second mounting flange. 5. The acetabular prosthesis of aspect 1, wherein at least one of the first hemispherical cup and the second hemispherical cup is hemispherical. 6. The acetabular prosthesis of aspect 1, wherein the first hemispherical cup has a diameter greater than a diameter of the second hemispherical cup. 7. Each of the first and second hemispherical cups includes a plurality of mounting holes defined therethrough, and each of the inner and outer cup cages includes The acetabular prosthesis of embodiment 1, wherein the at least one mounting hole of the first hemispherical cup is rotatable to align with the at least one mounting hole of the second hemispherical cup. 8. The first hemispherical cup has an inner concave surface and an outer convex surface, and a rim of the first hemispherical cup extends from the inner concave surface to the outer convex surface of the first hemispherical cup; The acetabular prosthesis of aspect 1, wherein the second hemispherical cup has an inner concave surface and an outer convex surface, and the rim of the second hemispherical cup extends from the inner concave surface to the outer convex surface of the second hemispherical cup. 9. The first hemispherical cup of the outer cup cage includes an elongated track and the second hemispherical cup includes a guide tab received within the elongated track; The acetabular prosthesis of aspect 1, wherein the guide tabs of the second hemispherical cup move within the elongated tracks of the first hemispherical cup when the inner cup cage and the outer cup cage are rotated about the axis. 10. The acetabular prosthesis of aspect 9, wherein the elongated track has an elongated opening, and the guide tab of the second hemispherical cup is insertable into the elongated opening when the second hemispherical cup is nested within the first hemispherical cup. 11. The acetabular prosthesis of aspect 9, wherein the guide tabs are captured within the elongated tracks such that the medial cup cage is secured to the lateral cup cage. 12. A method of performing an orthopaedic surgical procedure on a hip joint of a patient, comprising: inserting an outer cup cage of an acetabular prosthesis into the patient's acetabulum, the outer cup cage including a first hemispherical cup and a first mounting flange extending from a rim of the first hemispherical cup; inserting an inner cup cage of an acetabular prosthesis into an outer cup cage, the inner cup cage including a second hemispherical cup and a second mounting flange extending from a rim of the second hemispherical cup, and inserting the inner cup cage includes nesting the second hemispherical cup into the first hemispherical cup; and 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. rotating at least one of the inner cup cage and the outer cup cage relative to one another about an axis extending through an apex of each of the first and second hemispherical cups; securing the first mounting flange and the second mounting flange to a hip bone of the patient; The method includes: 13. The method of aspect 12, further comprising fixing the first hemispherical cup and the second hemispherical cup to the patient's acetabulum. 14. The method of aspect 12, further comprising inserting an acetabular cup prosthesis into the second hemispherical cup of the inner cup cage. 15. The method of aspect 14, further comprising fixing the first and second hemispherical cups and the acetabular cup prosthesis to the patient's acetabulum using bone cement. 16. The method of embodiment 12, wherein inserting the inner cup cage into the outer cup cage includes inserting a guide tab of a second hemispherical cup of the inner cup cage into an elongated track of a first hemispherical cup of the outer cup cage. 17. The method of aspect 16, wherein rotating at least one of the inner cup cage and the outer cup cage relative to one another includes moving a guide tab within an elongated track. 18. The first mounting flange comprises an iliac mounting flange and the second mounting flange comprises an ischial mounting flange; The method of claim 12, wherein rotating at least one of the inner cup cage and the outer cup cage relative to one another includes positioning an iliac mounting flange on the ilium of the patient's hip joint and positioning an ischial mounting flange on the ischia of the patient's hip joint. 19. An acetabular prosthesis for use in hip arthroplasty, the acetabular prosthesis comprising: an outer cup cage having a first hemispherical cup and an iliac attachment flange extending from a rim of the first hemispherical cup; an inner cup cage having a second hemispherical cup and a ischial portion extending from a rim of the second hemispherical cup, the second hemispherical cup having an outer diameter smaller than an inner diameter of the first hemispherical cup enabling the second hemispherical cup to be received within the first hemispherical cup; Inner cup cage; an acetabular cup prosthesis having an outer diameter smaller than an inner diameter of the second hemispherical cup, the outer diameter enabling the acetabular cup prosthesis to be received within the second hemispherical cup; Equipped with An acetabular prosthesis, wherein when the second hemispherical cup is received within the first hemispherical cup, each of the inner cup cage and the outer cup cage are rotatable relative to one another to independently position the iliac flange and the ischial flange. 20. The first hemispherical cup of the outer cup cage includes an elongated track and the second hemispherical cup includes a guide tab receivable within the elongated track; 20. The acetabular prosthesis of embodiment 19, wherein the guide tabs of the second hemispherical cup move within the elongated tracks of the first hemispherical cup when the inner cup cage and the outer cup cage are rotated about the axis.

[0045] [Embodiment] (1) An acetabular prosthesis, comprising: an outer cup cage having a first hemispherical cup and a first mounting flange extending from a rim of the first hemispherical cup; an inner cup cage having a second hemispherical cup and a second mounting flange extending from a rim of the second hemispherical cup; Equipped with the second hemispherical cup is sized to nest within the first hemispherical cup; When the second hemispherical cup is nested within the first hemispherical cup, each of the inner cup cage and the outer cup cage are rotatable relative to one another about an axis extending through an apex of each of the first and second hemispherical cups to selectively position the first and second mounting flanges. (2) the first mounting flange comprises an iliac mounting flange having a first mounting opening and configured to be secured to an ilium of a patient's hip joint through the first mounting opening; The acetabular prosthesis of embodiment 1, wherein the second mounting flange has a second mounting opening and includes an ischial mounting flange configured to be fixed to an ischial bone of the patient's hip joint through the second mounting opening. (3) An acetabular prosthesis as described in embodiment 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 as described in any of embodiments 1 to 3, wherein the first mounting flange and the second mounting flange are malleable to enable deformation of the shape of the first mounting flange and the second mounting flange. (5) An acetabular prosthesis according to any one of embodiments 1 to 4, wherein at least one of the first hemispherical cup and the second hemispherical cup is hemispherical.

[0046] (6) An acetabular prosthesis according to any one of embodiments 1 to 5, wherein the first hemispherical cup has a diameter larger than a diameter of the second hemispherical cup. (7) The acetabular prosthesis according to any one of embodiments 1 to 6, wherein each of the first hemispherical cup and the second hemispherical cup includes a plurality of mounting holes defined therethrough, and 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) The first hemispherical cup has an inner concave surface and an outer convex surface, and the rim of the first hemispherical cup extends from the inner concave surface to the outer convex surface of the first hemispherical cup; An acetabular prosthesis as described in any one of embodiments 1 to 7, wherein the second hemispherical cup has an inner concave surface and an outer convex surface, and the rim of the second hemispherical cup extends from the inner concave surface to the outer convex surface of the second hemispherical cup. (9) The first hemispherical cup of the outer cup cage includes an elongated track and the second hemispherical cup includes a guide tab received within the elongated track; An acetabular prosthesis as described in any of embodiments 1 to 8, wherein when the inner cup cage and the outer cup cage are rotated 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 of embodiment 9, wherein the elongated track has an elongated opening, and the guide tab of the second hemispherical cup is insertable into the elongated opening when the second hemispherical cup is nested within the first hemispherical cup.

[0047] (11) The acetabular prosthesis of any one of claims 9 to 10, wherein the guide tabs are captured within elongated tracks such that the inner cup cage is secured to the outer cup cage. (12) An acetabular prosthesis according to any one of embodiments 1 to 11, suitable for or for use in hip arthroplasty. (13) A method of performing an orthopaedic surgical procedure on a hip joint of a patient, comprising: inserting an outer cup cage of an acetabular prosthesis into the patient's acetabulum, the outer cup cage including a first hemispherical cup and a first mounting flange extending from a rim of the first hemispherical cup; inserting an inner cup cage of the acetabular prosthesis into the outer cup cage, the inner cup cage including a second hemispherical cup and a second mounting flange extending from a rim of the second hemispherical cup, and 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 one another about an axis extending through an apex of each of the first and second hemispherical cups while the second hemispherical cup is nested within the first hemispherical cup to position the first and second mounting flanges in corresponding desired positions; securing the first mounting flange and the second mounting flange to a hip bone of the patient; The method includes: 14. The method of claim 13, further comprising fixing the first hemispherical cup and the second hemispherical cup to the acetabulum of the patient. (15) The method of any one of claims 13 to 14, further comprising inserting an acetabular cup prosthesis into the second hemispherical cup of the inner cup cage.

[0048] (16) The method of embodiment 15, further comprising fixing the first and second hemispherical cups and the acetabular cup prosthesis to the acetabulum of the patient using bone cement. (17) The method of 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 of claim 17, wherein rotating at least one of the inner cup cage and the outer cup cage relative to one another includes moving the guide tab within the elongated track. (19) The first mounting flange comprises an iliac mounting flange, and the second mounting flange comprises an ischial mounting flange; The method of any of claims 13 to 18, wherein rotating at least one of the inner cup cage and the outer cup cage relative to one another includes positioning the iliac mounting flange on the ilium of the patient's hip joint and positioning the ischial mounting flange on the ischia of the patient's hip joint. (20) an outer cup cage having a first hemispherical cup and an iliac attachment flange extending from a rim of the first hemispherical cup; an inner cup cage having a second hemispherical cup and a ischial portion extending from a rim of the second hemispherical cup, the second hemispherical cup having an outer diameter smaller than an inner diameter of the first hemispherical cup enabling the second hemispherical cup to be received within the first hemispherical cup; an acetabular cup prosthesis having an outer diameter smaller than an inner diameter of the second hemispherical cup, allowing the acetabular cup prosthesis to be received within the second hemispherical cup; Equipped with An acetabular prosthesis as described in any of embodiments 1 to 11, wherein when the second hemispherical cup is received within the first hemispherical cup, each of the inner cup cage and the outer cup cage is rotatable relative to each other to independently position the iliac flange and the ischial flange.

[0049] (21) The first hemispherical cup of the outer cup cage includes an elongated track; the second hemispherical cup including a guide tab receivable within the elongated track; An acetabular prosthesis as described in embodiment 20, wherein when the inner cup cage and the outer cup cage are rotated around the axis, the guide tab of the second hemispherical cup moves within the elongated track of the first hemispherical cup. (22) An acetabular prosthesis as described in embodiment 20 or 21, suitable for or for use in hip arthroplasty.

Claims

1. 1. An acetabular prosthesis, comprising: an outer cup cage having a first hemispherical cup and a first mounting flange extending from a rim of the first hemispherical cup; an inner cup cage having a second hemispherical cup and a second mounting flange extending from a rim of the second hemispherical cup; Equipped with the second hemispherical cup is sized to nest within the first hemispherical cup; when the second hemispherical cup is nested within the first hemispherical cup, each of the inner cup cage and the outer cup cage are rotatable relative to one another about an axis extending through an apex of each of the first and second hemispherical cups to selectively position the first and second mounting flanges.

2. 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 joint through the first mounting aperture; 2. The acetabular prosthesis of claim 1, wherein the second mounting flange comprises an ischial mounting flange having a second mounting opening and configured to be secured to an ischial bone of the patient's hip joint through the second mounting opening.

3. 3. The acetabular prosthesis of claim 1 or 2, wherein the first mounting flange has a surface area greater than a surface area of ​​the second mounting flange.

4. The acetabular prosthesis of claim 1 , wherein the first and second mounting flanges are malleable to permit deformation of the shape of the first and second mounting flanges.

5. The acetabular prosthesis of claim 1 , wherein at least one of the first and second hemispherical cups is hemispherical.

6. The acetabular prosthesis of claim 1 , wherein the first hemispherical cup has a diameter greater than a diameter of the second hemispherical cup.

7. 2. The acetabular prosthesis of claim 1, wherein each of the first and second hemispherical cups includes a plurality of mounting holes defined therethrough, and each of the inner and outer cup cages 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. the first hemispherical cup having an inner concave surface and an outer convex surface, the rim of the first hemispherical cup extending from the inner concave surface to the outer convex surface of the first hemispherical cup; 2. The acetabular prosthesis of claim 1, wherein the second hemispherical cup has an inner concave surface and an outer convex surface, and the rim of the second hemispherical cup extends from the inner concave surface to the outer convex surface of the second hemispherical cup.

9. the first hemispherical cup of the outer cup cage includes an elongated track and the second hemispherical cup includes a guide tab received within the elongated track; 2. The acetabular prosthesis of claim 1, wherein the guide tabs of the second hemispherical cup move within the elongated track of the first hemispherical cup when the inner and outer cup cages are rotated about the axis.

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

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