Sacroiliac joint stabilization implant

Abstract

To facilitate dorsal delivery of sacroiliac joint implants. [Solution] The sacroiliac joint stabilization implant according to this disclosure has a configuration and dimensions such that the main body is positioned across the sacroiliac joint via delivery along a dorsal trajectory in which the iliac portion of the main body is positioned in the patient's ilium when the sacral portion of the main body is positioned in the patient's sacrum. The iliac portion has a first iliac arm and a second iliac arm that extend laterally. The main body has a sharp anterior portion that penetrates the bone and advances when the implant is advanced to cross the sacroiliac joint, and an iliac guide lumen that penetrates the first iliac arm. The iliac guide lumen has a surface suitable for contact with an elongated iliac guide positioned in the ilium. Contact between the iliac guide lumen and the elongated iliac guide restricts the iliac guide lumen from moving in one or more directions relative to the elongated iliac guide. The iliac guide lumen is positioned in the main body to contact the elongated iliac guide when the iliac portion is positioned in the ilium.

Description

Technical Field

[0001] (Cross - reference to related applications) This application claims the benefit of priority of U.S. Application No. 62 / 945,653, filed on December 9, 2019. The entire disclosure thereof is hereby incorporated by reference in its entirety for all purposes.

[0002] (Incorporation by reference) All publications and patent applications mentioned in this specification are hereby incorporated by reference into this specification to the same extent as if each individual publication or patent application was specifically and individually indicated to be incorporated by reference.

Background Art

[0003] To assist in stabilizing the sacro - iliac (SI) joint, an implant may be placed across the joint.

Summary of the Invention

Problems to be Solved by the Invention

[0004] The iliac region may have a greater density than the sacral region. The difference in bone density may pose challenges during the advancement of some sacro - iliac (SI) joint implants across the SI joint, depending on one or more of the insertion trajectory, the target position for implantation, and the configuration of the implant. There is a need for an implantation method that can facilitate the successful delivery from the dorsal approach of the SI joint implant to accommodate the difference in bone density.

Means for Solving the Problems

[0005] One aspect of the present disclosure is a method for positioning a sacroiliac joint stabilization implant across the sacroiliac joint from a dorsal entry point. The method may include advancing an elongated implant placement guide ("placement guide" or "guide") along a dorsal trajectory into the ilium of a subject; engaging a guide contact member of the sacroiliac joint stabilization implant with the placement guide to restrict the movement of the implant relative to the placement guide in at least one direction; advancing the implant across the sacroiliac joint while guiding the implant by the placement guide, at a point following the engagement step; and removing the placement guide from the ilium.

[0006] In this embodiment, the engagement step may limit the amount of movement of the implant toward the sacrum while advancing the implant across the sacroiliac joint.

[0007] In this embodiment, advancing the placement guide toward the ilium may include advancing the placement guide toward the ilium between the lateral and medial cortical walls of the ilium. In this embodiment, advancing the placement guide may include advancing the placement guide toward the ilium only.

[0008] In this embodiment, the method optionally further includes advancing the sacral placement guide into the patient's sacrum, following the placement guide into the ilium, and engaging the second guide contact member of the implant with the sacral placement guide, wherein the step of advancing the implant occurs even while the implant is being guided by the sacral placement guide, and removing the sacral placement guide from the sacrum. Engaging the second guide contact member of the implant with the sacral placement guide may be performed before advancing the sacral placement guide into the patient's sacrum. The method may further include advancing the second sacral placement guide into the subject's sacrum via a dorsal trajectory or dorsal approach, and engaging the second sacral guide contact member of the implant with the second sacral placement guide to restrict the movement of the implant relative to the second sacral placement guide in at least one direction.

[0009] In this embodiment, the method may optionally further include engaging a sharp broach with the placement guide prior to engaging the guide contact member with the placement guide, advancing the broach toward the sacroiliac joint to form a space for the implant while the broach is guided by the placement guide, and removing the broach to allow dorsal access to the space.

[0010] In this embodiment, engaging the guide contact member of the implant with the placement guide may include placing the annular member of the implant on the proximal region of the placement guide.

[0011] In this embodiment, engaging the implant's guide contact member with the placement guide may include positioning the implant's arc-shaped member around the proximal region of the placement guide.

[0012] In this embodiment, the method may further include advancing the second iliac placement guide in a dorsal trajectory toward the ilium of the subject, and engaging the second guide contact member of the implant with the second iliac placement guide to restrict the movement of the implant relative to the second iliac placement guide in at least one direction.

[0013] One aspect of this disclosure is a method for implanting a sacroiliac joint implant across the sacroiliac joint from a dorsal entry point while restraining the sacroiliac joint implant from moving away from the ilium toward the sacrum. This aspect may include any other steps or sequence of steps as claimed and / or described herein. In this aspect, the restraint step may include engaging a placement guide with a portion of the implant. [Brief explanation of the drawing]

[0014] [Figure 1A] Figure 1A shows an exemplary sacroiliac joint implant engaging with a placement guide. [Figure 1B] Figure 1B shows an exemplary sacroiliac joint implant engaging with a placement guide. [Figure 2A] Figure 2A is a view showing an exemplary sacroiliac joint implant engaged with a first placement guide and a second placement guide. [Figure 2B] Figure 2B is a view showing an exemplary sacroiliac joint implant engaged with a first placement guide and a second placement guide. [Figure 3A] Figure 3A is a view showing an exemplary sacroiliac joint implant engaged with a placement guide. [Figure 3B] Figure 3B is a view showing an exemplary sacroiliac joint implant engaged with a placement guide. [Figure 4A] Figure 4A is a view showing an exemplary sacroiliac joint implant engaged with a first placement guide and a second placement guide. [Figure 4B] Figure 4B is a view showing an exemplary sacroiliac joint implant engaged with a first placement guide and a second placement guide. [Figure 5A] Figure 5A is a view showing an exemplary sacroiliac joint implant engaged with a plurality of placement guides. [Figure 5B] Figure 5B is a view showing an exemplary sacroiliac joint implant engaged with a plurality of placement guides. [Figure 6A] Figure 6A is a view showing an exemplary sacroiliac joint implant engaged with a placement guide. [Figure 6B] Figure 6B is a view showing an exemplary sacroiliac joint implant engaged with a placement guide. [Figure 7] Figure 7 is a view showing an exemplary sacroiliac joint implant. [Figure 8] Figure 8 is a view showing a part of an exemplary sacroiliac joint implant engaged with a placement guide. [Figure 9] Figure 9 is a view showing a part of an exemplary sacroiliac joint implant engaged with a placement guide. [Figure 10] Figure 10 is a view showing an exemplary sacroiliac joint implant engaged with a plurality of placement guides. [Figure 11A] Figure 11A is a rear view showing an exemplary position for a placement guide. [Figure 11B]FIG. 11B is a diagram showing an exemplary implantation position for a sacroiliac joint implant across the sacroiliac joint.

DETAILED DESCRIPTION OF THE INVENTION

[0015] The disclosure herein relates to a sacroiliac joint stabilization implant and a method of implanting a sacroiliac joint stabilization implant across the sacroiliac joint. The method includes implanting a stabilization implant across the sacroiliac joint from a dorsal access such that a first portion of the implant is disposed on the ilium and a second portion of the implant is disposed on the sacrum. The implants herein are sized and configured to be implanted by any of the implantation methods herein unless indicated to the contrary.

[0016] The region of the ilium where a portion of the implant is disposed may have a greater density than the region of the sacrum where the second portion of the implant is disposed. When placing a sacroiliac joint implant across the sacroiliac joint from a dorsal access, the implant has a tendency to deviate from the high-density cortical ilium and move towards the lower-density sacrum. This prevents the implant from being properly placed across the sacroiliac joint. Methods of implantation and implants are described herein that can maintain an appropriate implant trajectory when advancing a sacroiliac joint implant across the sacroiliac joint from a dorsal access. The methods and accesses herein take into account the difference in bone density between the ilium and the sacrum and can prevent the implant from moving away from the high-density ilium during implantation.

[0017] The methods described herein involve advancing one or more placement guides (any of which may be referred to herein as “guides”) from a dorsal entry into the ilium, and in some embodiments, advancing between the lateral and medial cortical walls of the ilium. Figure 11A is a posterior view showing a general dorsal entry for an implantation transverse to the sacroiliac joint as described herein. Figure 11B shows an exemplary implant 1106 implanted transverse to the sacroiliac joint 1114'. The implant 1106 has a first region of the implant positioned in the ilium 1110, a second region of the implant positioned in the sacrum 1112, and a central region extending transverse to the sacroiliac joint 1114'. Figures 11A and 11B, which are referenced in more detail below, show the ilium 1110, the sacrum 1112, the sacroiliac joints 1114, 1114', and the lumbar vertebra 1116. Figure 11A also shows a general region 1120, which is a starting point for advancing the iliac placement guide into the ilium, and a general region 1130, which is a starting point for advancing the sacral placement guide into the ilium. Furthermore, Figure 11A shows an exemplary iliac starting point 1122 for the iliac placement guide, and similarly, an exemplary sacral starting point 1132 for the sacral placement guide. Any iliac placement guide in this specification may have a starting point such as the iliac starting point 1122 in the general region 1120. Any sacral placement guide in this specification may have a starting point such as the sacral starting point 1132 in the general region 1130. Radiographic images may be acquired and used to assist in guiding the placement guide into the ilium between the lateral and medial cortical walls of the ilium, as generally shown in Figures 11A and 11B. The method in this specification includes bringing the iliac placement guide into contact with a portion of the sacroiliac joint implant, such as the contact member of the implant in this specification, in order to guide the implant across the sacroiliac joint. The iliac placement guide is positioned in a relatively dense area of ​​the ilium, and by contacting and engaging with the implant, the guide can help ensure that a portion of the implant remains more reliably on its path during the advancement of implantation in a dorsal approach, rather than moving away from the relatively dense cortical ilium towards the sacrum.Therefore, the placement guides herein are sized and configured to be in direct contact with the implant and to function as guides for a portion of the implant, so that the iliac portion of the implant is more reliably and properly positioned in the ilium and the implant is more reliably embedded across the sacroiliac joint.

[0018] The placement guide is dimensioned and configured to generally restrict the movement of the implant relative to the placement guide in at least one direction. The implant may move freely relative to the placement guide in other ways or directions. For example, as shown in Figures 1A and 1B, the implant may still be rotatable relative to the guide even after contact. However, as the implant advances along a dorsal trajectory on the guide, the guide can maintain the desired trajectory of at least a portion of the implant.

[0019] The method described herein includes advancing the implant across the sacroiliac joint while a guide assists in guiding a portion of the implant into the ilium. The method may also include removing the placement guide from the ilium after the implant has been positioned across the sacroiliac joint.

[0020] The methods described herein may include positioning one or more placement guides, optionally positioning one or more guides in the ilium, and optionally positioning one or more guides in the sacrum. Any one or more of the guides described herein may be sized and configured to function as a placement guide that helps guide a portion of the implant into the ilium or sacrum.

[0021] Some alternative methods and implants may allow the sacroiliac joint stabilization implant to be advanced across the sacroiliac joint from a dorsal entry point without the use of a placement guide. For example, these methods may include imaging the iliac teardrop region by radiography and advancing the implant while the teardrop region is being imaged, in order to better ensure that a portion of the implant remains sufficiently in the path to the iliac teardrop region. Thus, any method described herein may optionally omit the iliac placement guide and may rely on radiographic images, such as the teardrop region, to help maintain the desired trajectory of the implant to the iliac teardrop region. Implants implanted by these methods may be implanted using a broach (described in more detail below) or without a broach. If implanted without a broach, the implant may have a distal end region configured to penetrate the bone. The distal end region may optionally have a sharp distal end.

[0022] Sacroiliac joint implants as used herein, such as any of the sacroiliac joint stabilization implants shown in Figures 1A to 10, are generally sized and configured to contact an elongated iliac placement guide, and may also be sized and configured to contact one or more additional placement guides. The one or more additional placement guides may be iliac guides or sacral guides.

[0023] The following exemplary sacroiliac joint stabilization implants may be used in any of the methods for stabilizing the sacroiliac joint described herein. It is understood that features shown in different embodiments may be combined, even if not explicitly included in the text of the embodiments. For example, the implants shown in Figures 1A, 1B, 2A, and 2B each include a contact member having an annular inner surface defining a lumen, even if not explicitly included in the text. Furthermore, similar components may be denoted by the same reference numerals in different embodiments. For example, references to elements 10, 20, 30, 40, etc., in the figures are understood to describe a system even if the text relating to any particular embodiment does not refer to it with reference numerals.

[0024] Figures 1A and 1B (a posterior and a perspective view, respectively) illustrate an exemplary system 10 including a sacroiliac joint stabilization implant 14. The sacroiliac joint stabilization implant 14 includes an iliac guide contact member 18 that contacts an elongated iliac guide 12. In this specification, contact may also be referred to as engagement. The implant 14 includes a body 16. A portion of the body 16 is positioned across the joint when the implant is embedded. The contact member 18 includes a surface 19. The surface 19 has a shape that is dimensioned and configured to contact the corresponding shape of the elongated iliac guide 12, and in this example is annular. In these figures, the guide may or may not be already positioned in the ilium, such as in the general and exemplary position shown in Figure 11. The contact between the guide and the implant's contact member restricts the movement of the implant's guide contact member relative to the elongated iliac guide in one or more directions. In this example, the implant can still rotate relative to the guide. In this embodiment, the guide has a cylindrical shape and an annular outer shape in cross-section along substantially the entire length of the guide (excluding the distal end region which may be configured to penetrate the bone). In the drawings of this specification, including Figures 1A and 10, "S" indicates the sacrum and "I" indicates the ilium. Any guide in this specification may be considered to have a cylindrical shape along the entire length of the guide or substantially the entire length of the guide.

[0025] Any guide described herein may include a sharp or pointed distal end (for example, as shown in Figures 1B, 2B, 3B, etc.). The distal end may be configured to facilitate penetration into bones such as the ilium and / or sacrum.

[0026] Figures 2A and 2B show an exemplary system 20 including a sacroiliac joint stabilization implant 24, an iliac guide 22, and an optional elongated sacral guide 21. In the shown figures, each of the iliac guide 22 and the sacral guide 21 may or may not be positioned within the ilium and sacrum, respectively. In some ways, one or more guides may be inserted into the bone, and then the implant may advance along the guide. In some embodiments, the implant may come into contact with one or more guides, and then one or more guides may be inserted into the bone. Combining the implant with multiple guides (in examples with more than one guide) before guide insertion may help prevent the guides from separating in a position that would prevent them from being inserted into the bone and then the implant from coming into contact with the guides and advancing smoothly across the sacroiliac joint along the guide. Combining the implant with the guides initially may help the guides separate appropriately to accommodate the implant during implantation. In any embodiment described herein, an iliac guide may be inserted into the ilium, then the guide may contact an implant, then the implant may contact a sacral guide, and then the sacral guide may be inserted into the sacrum. The implant may then advance across the sacroiliac joint.

[0027] Any dashed lines in the implant body shown herein (Figures 1A, 2A, 3A, 4A, etc.) may indicate any holes or openings within the implant body. Such holes or openings may extend through the distal and proximal surfaces of the implant body.

[0028] Figures 3A and 3B show an exemplary system 30 including an implant 34. The implant 34 includes a guide contact member 33 having a surface 35 sized and configured to contact a guide 32. The guide 32 may be an iliac guide. In this embodiment, the member 33 has a curved, substantially complete annular shape.

[0029] Figures 4A and 4B show an exemplary system 40 including an implant 44 having a first iliac guide contact member 43 and a second iliac guide contact member 45. Each of the first iliac guide contact member 43 and the second iliac guide contact member 45 has a surface configured to contact the guides 41 and 42, respectively. The members 43 and 45 in this embodiment extend further away from the main body region than the guide contact members in Figures 1A, 1B, 2A, and 2B, for example.

[0030] Figures 5A and 5B show an exemplary system 50 including an exemplary implant 54, exemplary iliac guides 51, 52, and sacral guides 53, 55. The implant 50 includes four guide members 56, 57, 58, 59. Each guide member 56, 57, 58, 59 is configured to contact a separate guide. The body of the implant has a common "X" shape or cross shape, but can have other body shapes such as square, rectangular, or elliptical, and may still have four (or more) guide contact members.

[0031] Figures 6A and 6B show an exemplary system 60 including an implant 64 configured to contact a guide 62. In this embodiment, the guide 62 includes a recessed region configured to stably contact a contact member 63. In this example, the contact member 63 is a projection or extension from the main body region of the implant. This is an example of an implant having a guide contact member extending into the guide, in contrast to guide contact members that extend around a portion of the guide, as shown in Figures 1A to 5B. The contact in this embodiment causes the guide 62 to function as a guide for the implant 64 during implantation.

[0032] Figure 7 shows an exemplary implant 70 or broach 70 having a sharp distal end. When used as a broach, the broach 70 may be configured to have any of the guide members described herein. In use, the broach 70 can be guided along one or more guides (before the implant is embedded) to form a space across the sacroiliac joint for the implant. The broach is removable, after which the implant can advance along the guides. This is described in more detail below.

[0033] When used as an implant, the implant 70 may be configured to have any guide members as specified herein (e.g., including a lumen). In the method of use, the implant 70 can be guided along one or more guides and positioned. The sharp area of ​​the implant may not only function as an implant but also form a space.

[0034] Figure 8 shows an exemplary implant 84 including a guide contact member 86 configured to contact a guide 82. In this exemplary embodiment, the guide 82 has a triangular shape (the shape may also have other linear shapes). The member 86 includes a triangular shape on its inner surface (the shape may also have other linear shapes), as shown in the figure. The implant 84 may also have any number of members 86, each of which may be configured to contact a different guide.

[0035] Any implant described herein may include a guide contact member having a first configuration and a second guide contact member having a second configuration different from the first configuration. For example, any of the implants in this specification may include one or more contact members that are identical or similar to member 23, member 33, member 63, and / or member 86.

[0036] Figure 9 shows an exemplary system 90 including an implant 94. The implant 94 comprises multiple arms. Not all arms include a guide contact member at the end of each arm. In this embodiment, only one of the arms has a guide contact member (member 96 in this embodiment). However, in other embodiments, the implant may comprise any number of members less than the number of arms extending from the main body (e.g., 2, 3, 4, etc.).

[0037] Figure 10 shows an exemplary system 100 including an implant 104 (shown in the end view). The implant 104 includes an iliac guide contact member 106 and a sacral guide contact member 108. Each of the iliac guide contact member 106 and the sacral guide contact member 108 is configured to contact guides 110 and 112, respectively. The illustrated state shows the implant embedded and positioned across the sacroiliac joint, indicating that any implant as described herein may be embedded with one guide member (e.g., 106) located in one type of bone above the other guide member located in a different type of bone (e.g., ilium versus sacrum). For example, guide 110 may be located in the ilium. Guide 112 may be located in the sacrum, either below guide 110 as shown, or above guide 110, which may be above guide 110 in other embodiments, although not shown.

[0038] Any implant described herein may comprise one or more surfaces configured and adapted to promote at least one of ingrowth and ongrowth of bone. For example, any implant described herein may comprise one or more of the following, without limitation, fenestrations, holes, porous surfaces, or uneven surfaces, such as any of those described in U.S. Patent No. 9,044,321, U.S. Publication No. 2013 / 0296953, U.S. Patent No. 9,662,157, U.S. Patent No. 10,166,033, and U.S. Publication No. 2016 / 0287171. The foregoing disclosures are incorporated herein by reference for all purposes.

[0039] As specified herein, a sacroiliac joint implant may include one or more contact members which may constitute a lumen or opening. Generally, the contact members are sized and configured to accommodate the passages of one or more guides (such as iliac guides) which are positioned inside one or more of the ilium or sacrum. In this way, the sacroiliac joint implant may be guided by the placement guide to its intended implantation position across the sacroiliac joint without moving away from (or at least minimizing) the dense ilium.

[0040] In some embodiments, the sacroiliac joint implant may include contact members on opposing sides or lateral regions of the sacroiliac joint implant, examples of which are shown in Figures 2A and 2B. In this arrangement, the implant advances along a guide to position the implant across the sacroiliac joint. The guide may be removed after the sacroiliac joint implant has reached the desired position, leaving behind the implant embedded across the sacroiliac joint.

[0041] One aspect of this disclosure relates to a method for positioning a sacroiliac joint stabilization implant across the sacroiliac joint from a dorsal entry point. In these methods, the sacroiliac joint implant may be any sacroiliac joint implant as provided herein. The method may include advancing an elongated iliac placement guide from a dorsal entry point, such as the starting point 1122 shown in Figure 11A, into the patient's ilium. For illustrative purposes only, Figures 2A and 2B show an exemplary iliac guide 22, but other types of iliac guides may be positioned from a dorsal entry point into the patient's ilium. Also, Figure 11A shows a general area 1120. Any iliac guide as provided herein may be started in the general area 1120 and advance into the ilium, serving as a guide for the sacroiliac joint implant. The methods as provided herein may include engaging a guide contact member of the sacroiliac joint implant with a placement guide to restrict the movement of the implant relative to the placement guide in at least one direction. For illustrative purposes only, Figures 1A and 1B show an iliac guide contact member 18 of a sacroiliac joint implant 14. However, other contact members in this specification may engage with any guide in this specification and restrict the movement of the sacroiliac joint implant relative to the placement guide in at least one direction. The method may include, at a point following the engagement step, advancing the implant across the sacroiliac joint while guiding the implant by the placement guide, thereby embedding the implant across the sacroiliac joint. The method further includes removing the placement guide from the ilium, leaving the implant embedded across the sacroiliac joint. The method may also include advancing the placement guide into the ilium between the lateral and medial cortical walls of the ilium. The description and location are generally known and are generally shown in Figures 11A and 11B. In these methods, engaging the implant with the ilium placement guide helps maintain the trajectory of the embedment and limits the degree of movement of the implant toward the sacrum while the implant advances across the sacroiliac joint.

[0042] Some methods may include advancing the sacral placement guide into the patient's sacrum and further engaging the second guide contact member of the implant with the sacral placement guide. In these examples, the step of advancing the implant may also be performed while the implant is being guided by the sacral placement guide. In these examples, the method also includes removing the sacral placement guide from the sacrum. Any method described herein may include placing the sacral placement guide in the sacrum before or after the iliac placement guide is placed in the ilium.

[0043] In some methods, before implanting the implant, a sharp broach may be guided on any placement guide as described herein and advanced toward the sacroiliac joint, creating a space for the sacroiliac joint implant while the broach is guided by the placement guide. In these embodiments, the method includes removing the broach to allow dorsal access to the space. The implant can then be advanced on one or more placement guides as described elsewhere herein.

[0044] Any method described herein may include positioning a second iliac placement guide from a dorsal entry point into the patient's ilium, depending on the implant being embedded across the sacroiliac joint. These examples may also include engaging a second guide contact member of the implant with the second iliac placement guide to further restrict the movement of the implant relative to the second iliac placement guide in at least one direction.

[0045] Any method described herein may include positioning the first sacral placement guide and the second sacral placement guide on the subject's sacrum from a dorsal entry point, depending on the implant being embedded across the sacroiliac joint. These examples may also include engaging the first sacral guide contact members and the second sacral guide contact members of the implant with the first and second sacral placement guides to further restrict the movement of the implant relative to the first and second sacral placement guides in at least one direction.

[0046] Any of the individual steps of the methods described herein may be combined with any other suitable step or sequence of steps of any other suitable method, unless otherwise indicated herein.

Claims

1. A sacroiliac joint stabilization implant comprising an integrally formed implant body, The implant body is configured and sized to be positioned across the sacroiliac joint via a dorsal trajectory delivery, where the sacral portion of the implant body is positioned in the patient's sacrum and the iliac portion of the implant body is positioned in the patient's ilium. The ilium portion has a first iliac arm and a second iliac arm extending outward from the ilium portion, The implant body has a sharp anterior portion that penetrates the bone and advances when the implant is advanced across the sacroiliac joint. The implant body further has an iliac guide lumen that penetrates the first iliac arm, The iliac guide lumen has a surface that is positioned in the ilium via delivery along a dorsal orbit and has a configuration suitable for contact with an elongated iliac guide. When the lumen of the iliac guide and the elongated iliac guide come into contact, this contact restricts the lumen of the iliac guide from moving in one or more directions relative to the elongated iliac guide. The iliac guide lumen is located in the implant body at a position where it contacts the elongated iliac guide when the iliac portion is positioned on the ilium. Sacroiliac joint stabilization implant.

2. The implant body further comprises at least one sacral arm extending from the sacral portion, The at least one sacral arm is provided with a sacral guide lumen that penetrates the at least one sacral arm, The sacral guide lumen has a surface that is suitable for contact with an elongated sacral guide positioned in the sacrum via delivery along a dorsal orbit, When the sacral guide lumen and the elongated sacral guide come into contact, this contact restricts the sacral guide lumen from moving in one or more directions relative to the elongated sacral guide. The sacral guide lumen is located in the implant body at a position where it contacts the elongated sacral guide when the sacral portion is positioned on the patient's sacrum. The sacroiliac joint stabilization implant according to claim 1.

3. The implant body has a first sacral arm and a second sacral arm extending from the sacral portion, Each of the first sacral arm and the second sacral arm further has a sacral guide lumen that penetrates the first sacral arm or the second sacral arm, Each of the sacral guide luminal portions has a surface that is positioned in the sacrum via delivery along a dorsal orbit and has a configuration suitable for contact with an elongated sacral guide, When the sacral guide lumen and the elongated sacral guide come into contact, such contact restricts the sacral guide lumen from moving in one or more directions relative to the elongated sacral guide. The sacroiliac joint stabilization implant according to claim 1.

4. The implant body further has a second iliac guide lumen that penetrates the second iliac arm, Each of the iliac guide luminal portions has a surface that is positioned in the ilium via delivery along a dorsal orbit and has a configuration suitable for contact with an elongated iliac guide, When the lumen of the iliac guide and the elongated iliac guide come into contact, this contact restricts the lumen of the iliac guide from moving in one or more directions relative to the elongated iliac guide. Both the iliac guide lumen provided in the first iliac arm and the iliac guide lumen provided in the second iliac arm are positioned in the implant body to contact the elongated iliac guide when the iliac portion is placed on the patient's ilium and when the sacral portion is placed on the patient's sacrum. The sacroiliac joint stabilization implant according to claim 1.

5. The sacroiliac joint stabilization implant according to claim 1, wherein the iliac guide lumen is located in the implant body at a position that contacts the elongated iliac guide when the iliac portion is positioned on the patient's ilium and when the sacral portion is positioned on the patient's sacrum.

6. The implant body further has a sacral guide lumen that penetrates the sacral portion, The sacral guide lumen has a surface that is suitable for contact with an elongated sacral guide positioned in the sacrum via delivery along a dorsal orbit, When the sacral guide lumen and the elongated sacral guide come into contact, this contact restricts the sacral guide lumen from moving in one or more directions relative to the elongated sacral guide. The sacral guide lumen is located in the implant body at a position where it contacts the elongated sacral guide when the sacral portion is positioned on the patient's sacrum. The sacroiliac joint stabilization implant according to claim 5.

7. The implant body further has a second iliac guide lumen that penetrates the second iliac arm, The lumen of the second iliac guide has a surface that is suitable for contact with the second elongated iliac guide positioned in the ilium via delivery along a dorsal orbit, When the lumen of the second iliac guide and the second elongated iliac guide come into contact, this contact restricts the lumen of the second iliac guide from moving in one or more directions relative to the second elongated iliac guide. The lumen of the second iliac guide is located in the implant body at a position that contacts the second elongated iliac guide when the iliac portion is positioned in the patient's ilium and when the sacral portion is positioned in the patient's sacrum. The sacroiliac joint stabilization implant according to claim 5.

8. The sacroiliac joint stabilization implant according to any one of claims 5 to 7, wherein the first iliac arm and the second iliac arm extend from the iliac portion at an angle that separates them from each other.

9. The sacroiliac joint stabilization implant according to claim 1, wherein the ilium and the sacrum are in the same plane.

10. The sacroiliac joint stabilization implant according to claim 1, wherein the first iliac arm portion forms an angle portion that separates from the iliac portion.

Images