ORTHOPAEDIC IMPLANT SYSTEM FOR COMPRESSION-DISTRACTION OF JOINTS
20250339187 ยท 2025-11-06
Inventors
- Roy C. Wiley (North Webster, IN, US)
- Lew C. Schon (Baltimore, MD, US)
- Malik S. Siddique (Newcastle upon Tyne, GB)
Cpc classification
A61F2002/30622
HUMAN NECESSITIES
A61B17/68
HUMAN NECESSITIES
A61B17/686
HUMAN NECESSITIES
A61F2002/4238
HUMAN NECESSITIES
A61F2002/4251
HUMAN NECESSITIES
A61F2002/4233
HUMAN NECESSITIES
A61B17/66
HUMAN NECESSITIES
A61B17/8004
HUMAN NECESSITIES
International classification
Abstract
An orthopaedic implant system includes an orthopaedic implant having a plurality of fixation openings and a plug opening defining a plug opening diameter that is greater than a diameter of any of the fixation openings. The plurality of fixation openings include at least one first fixation opening configured to accept a fixation element inserted in a first bone and at least one second fixation opening configured to accept a fixation element inserted in a second bone. The plug opening is configured to accept a plug inserted in a joint space between the first bone and the second bone to cause compression distraction of the first bone and the second bone.
Claims
1. A method of implanting an orthopaedic implant, the method comprising: positioning the orthopaedic implant so that a first fixation opening of the orthopaedic implant is positioned over a first bone and so that a second fixation opening of the orthopaedic implant is positioned over a second bone; inserting a first fixation element into the first bone through the first fixation opening; and inserting a second fixation element into the second bone through the second fixation opening; wherein: a plug opening of the orthopaedic implant is aligned with a joint space between the first bone and the second bone after inserting the first fixation element into the first bone and after inserting the second fixation element into the second bone; the plug opening has a plug opening diameter that is greater than a diameter of any of the fixation openings and is configured to accept a plug therein.
2. The method of claim 1, further comprising inserting a plug into the plug opening to cause compression distraction of the first bone and the second bone.
3. The method of claim 2, wherein the plug comprises a head defining a head diameter that is greater than a diameter of the plug opening.
4. The method of claim 1, further comprising inserting a plug into the plug opening so that a portion of the plug extends out of the plug opening when the plug is fully inserted in the plug opening so that the head of the plug abuts against the orthopaedic implant, wherein the portion of the plug that extends out of the plug opening defines a protruding length of 2-4 mm to cause compression distraction of the first bone and the second bone.
5. The method of claim 1, further comprising inserting a plug into the plug opening so that a portion of the plug extends out of the plug opening when the plug is fully inserted in the plug opening so that the head of the plug abuts against the orthopaedic implant, wherein the portion of the plug that extends out of the plug opening defines a protruding length of 1-7 mm to cause compression distraction of the first bone and the second bone.
6. The method of claim 1, further comprising inserting a graft and a plug into the plug opening to compress the graft against the first bone and the second bone and to cause compression distraction of the first bone and the second bone.
7. The method of claim 1, further comprising harvesting a plug of tissue from the joint space and inserting a graft into the joint space after harvesting the plug of tissue, wherein harvesting the plug of tissue and inserting the graft are performed before inserting the plug into the plug opening.
8. The method of claim 1, comprising: positioning the orthopaedic implant so that the first fixation opening and a third fixation opening of the orthopaedic implant are positioned over the first bone, wherein the third fixation opening is spaced apart from the first fixation opening; and inserting a third fixation element into the first bone through the third fixation opening.
9. The method of claim 8, further comprising: positioning the orthopaedic implant so that the second fixation opening and a fourth fixation opening of the orthopaedic implant are positioned over the second bone, wherein the fourth fixation opening is spaced apart from the second fixation opening; and inserting a fourth fixation element into the second bone through the fourth fixation opening.
10. The method of claim 1, wherein: the first fixation opening is in a first portion of the orthopaedic implant; the second fixation opening is in a second portion of the orthopaedic implant that is different than the first portion of the orthopaedic implant; the plug opening is positioned in a portion of the orthopaedic implant that is between the first portion and the second portion.
11. The method of claim 1, wherein the orthopaedic implant comprises a first portion that includes the first fixation opening and a second portion that includes the second fixation opening and wherein the first portion is connected to the second portion by an offsetting portion having an offset so the first portion is lower than the second portion by the amount of the offset of the offsetting portion.
12. The method of claim 1, wherein the first and second fixation elements are bone screws.
13. A method of implanting an orthopaedic implant, the method comprising: positioning the orthopaedic implant so that a first opening is aligned with a joint space between a first bone and a second bone; fastening the orthopaedic implant to the first bone and the second bone; and inserting a plug into the first opening.
14. The method of claim 13, wherein inserting the plug into the first opening causes compression distraction of the first bone and the second bone.
15. The method of claim 13, wherein fastening the orthopaedic implant to the first bone comprises passing a first fastener through a first fixation opening in the orthopaedic implant and into the first bone and passing a second fastener through a second fixation opening in the orthopaedic implant and into the second bone.
16. The method of claim 15, wherein: the first fixation opening is in a first portion of the orthopaedic implant; the second fixation opening is in a second portion of the orthopaedic implant that is different than the first portion of the orthopaedic implant; the first opening that is configured to receive the plug is positioned in a portion of the orthopaedic implant that is between the first portion and the second portion.
17. The method of claim 13, wherein fastening the orthopaedic implant to the first bone further comprises passing a third fastener through a third fixation opening in the orthopaedic implant and into the first bone and passing a fourth fastener through a fourth fixation opening in the orthopaedic implant and into the second bone.
18. The method of claim 13, wherein the orthopaedic implant comprises a first portion that includes a first fixation opening and a second portion that includes a second fixation opening and wherein the first portion is connected to the second portion by an offsetting portion having an offset so the first portion is lower than the second portion by the amount of the offset of the offsetting portion.
19. The method of claim 13, further comprising inserting the plug into the first opening so that a portion of the plug extends out of the first opening when the plug is fully inserted in the first opening so that the head of the plug abuts against the orthopaedic implant, wherein the portion of the plug that extends out of the first opening defines a protruding length of 2-4 mm to cause compression distraction of the first bone and the second bone.
20. The method of claim 13, further comprising inserting the plug into the first opening so that a portion of the plug extends out of the first opening when the plug is fully inserted in the first opening so that the head of the plug abuts against the orthopaedic implant, wherein the portion of the plug that extends out of the first opening defines a protruding length of 1-7 mm to cause compression distraction of the first bone and the second bone.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0011] The above-mentioned and other features and advantages of this invention, and the manner of attaining them, will become more apparent and the invention will be better understood by reference to the following description of embodiments of the invention taken in conjunction with the accompanying drawings, wherein:
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[0025] Corresponding reference characters indicate corresponding parts throughout the several views. The exemplifications set out herein illustrate embodiments of the invention and such exemplifications are not to be construed as limiting the scope of the invention in any manner.
DETAILED DESCRIPTION OF THE INVENTION
[0026] Referring now to the drawings, and more particularly to
[0027] The orthopaedic implant 100 also includes a single plug opening 102 that is a largest opening of the orthopaedic implant 100. The plug opening 102 may, for example, define a plug opening diameter POD that is a relatively high percentage of a greatest width GW of the orthopaedic implant 100, e.g., the plug opening diameter POD may be greater than 50% of the greatest width GW, such as 50-90% of the greatest width GW. In addition, or alternatively, the plug opening 102 may define a plug opening diameter POD that is several times a fixation opening diameter FOD of the fixation openings 101. For example, the plug opening diameter POD may be at least double the fixation opening diameter FOD or even at least triple the fixation opening diameter FOD. In other words, the plug opening diameter POD is greater than the fixation opening diameter FOD of any of the fixation openings 101. While the openings 101, 102 are illustrated as being circular, in some embodiments the openings 101, 102 are non-circular or even non-round; in such embodiments, the plug opening diameter POD may correspond to a plug opening width that is a largest dimension of the plug opening 102. Further, it should be appreciated that while the orthopaedic implant 100 is illustrated with a single plug opening 102, in some embodiments the orthopaedic implant 100 includes multiple plug openings, e.g., if the orthopaedic implant spans across more than two bones such as a first bone, a second bone, and a third bone, that are considerably larger than any other openings of the orthopaedic implant 100. In embodiments with multiple plug openings, the diameter of each plug opening may be less than 50% of the greatest width of the orthopaedic implant if necessary, e.g., to prevent the plug openings from overlapping and/or splitting the orthopaedic implant in half.
[0028] As best illustrated in
[0029] Referring specifically now to
[0030] The plug opening 102 is configured to accept the plug 200 inserted in a joint space between a first bone and a second bone to cause compression distraction of the first bone and the second bone. As illustrated in
[0031] The plug 200 bearing on the bones may create compression of a graft and/or the graft creates compression against bone ends of the bones while also distracting the bones, leading to compression distraction that can maintain the length integrity of the anatomical structures rather than shortening the length, which is commonly encountered when performing a fusion surgery. In some embodiments, the portion(s) of the plug 200 that extends out of the plug opening 102, when the plug 200 is fully inserted, defines a protruding length of 2-4 mm or 1-7 mm.
[0032] Referring now to
[0033] As can be seen in FIG. SA, the first region 513A may be fixated to a first bone B1 by fixation elements extending through the fixation openings 511A, which may also be referred to as first fixation openings. The second region 513B, on the other hand, may be fixated to a second bone B2 by fixation elements extending through the fixation openings 511B, which may also be referred to as second fixation openings. A joint space JS is established between the first bone B1 and the second bone B2. The orthopaedic implant 510 may be placed so the first region 513A is properly placed on the first bone B1 and the second region 513B is properly placed on the second bone B2, with the plug opening 512 being located above, i.e., aligned with, the joint space JS. The regions 513A, 513B may be initially fixed with one or more fixation elements, such as bone screws, inserted in the fixation openings 511A, 511B and into the bones B1, B2. The initial fixation can hold the orthopaedic implant 510 in place during subsequent surgical steps.
[0034] A plug of tissue may be harvested from the joint space JS and replaced with a graft 530 that may be greater in size than the harvested plug of tissue. The plug of tissue may be harvested through the plug opening 512 of the orthopaedic implant 510, which may be left open, so the orthopaedic implant 510 does not need to be positioned following plug harvesting. It should thus be appreciated that the harvested plug of tissue may have a diameter (or width) that is smaller than the corresponding diameter (or width) of the plug opening 512. The graft 530 may also be inserted into the joint space JS through the plug opening 512. The graft 530 may be, for example, biological tissue such as an autograft, allograft, etc., a scaffold configured to allow tissue ingrowth, or a combination of both. The graft 530 may have a diameter that is 1-2 mm greater than that of the harvested plug of tissue so the graft 530 can compress against the bones 510, 520. After the graft 530 is placed, additional fixation elements can be inserted into the fixation openings 511A, 511B and the bones B1, B2 to fully secure the orthopaedic implant 510 to the bones B1, B2 and the plug 520 can be inserted into the plug opening 512 to cause compression distraction of the first bone B1 and the second bone B2. In some embodiments, the plug 520 is inserted into the plug opening 512 prior to inserting additional fixation elements into the fixation openings 511A, 511B; in some embodiments, additional fixation elements are inserted into the fixation openings 511A, 511B prior to inserting the plug 520 into the plug opening 512.
[0035] The plug 520 extends through the plug opening 512 so a portion of the plug 520 compresses the graft 530, which maintains the graft 530 in place. As the plug 520 is inserted, a tapered section 523 of the plug 520 can gradually create distance between the bones B1, B2 to distract the bones B1, B2. A portion of the plug 520, such as a cylindrical section 522 of the plug 520, can contact cortical bone after the plug 520 is fully inserted in the plug opening 512 to distract the bones B1, B2 and maintain the length integrity of the anatomical structures by not allowing the bones B1, B2 to migrate toward one another. Thus, the plug 520 can create compression between the graft 530 and the bones B1, B2 and distraction on the bones B1, B2 so the anatomical structures do not shorten following the fusion. It should be appreciated that while the procedure of implanting an orthopaedic implant system 500 is described in the context of
[0036] Referring now to
[0037] Referring now to
[0038] As previously described, orthopaedic implants provided according to the present invention may include multiple plug openings that are each configured to accept a respective plug. Referring now to
[0039] Referring now to
[0040] B2. The method 900 further includes inserting 902 a first fixation element into the first bone B1 through the at least one first fixation opening 101, 511A, 701, 801A and inserting 903 a second fixation element into the second bone B2 through the at least one second fixation opening 101, 511B, 701, 801B. A plug opening 102, 512, 702, 802A, 802B, 802C of the orthopaedic implant 100, 510, 700, 800 is aligned with a joint space JS between the first bone B1 and the second bone B2 after inserting 902 the first fixation element into the first bone B1 and after inserting 903 the second fixation element into the second bone B2. Inserting 902, 903 the fixation elements may be performed after the plug opening 102, 512, 702, 802A, 802B, 802C is already aligned with the joint space JS, with the inserted fixation elements providing initial fixation to maintain the alignment. The plug opening 102, 512, 702, 802A, 802B, 802C defines a plug opening diameter POD that is greater than a diameter FOD of any of the fixation openings 101, 511A, 511B, 701, 801A, 801B and is configured to accept a plug 200, 520, 600, 803A, 803B, 803C inserted in the joint space JS to cause compression distraction of the first bone B1 and the second bone B2. The method 900 may further include inserting 904 a plug 200, 520, 600, 803A, 803B, 803C into the plug opening 102, 512, 702, 802A, 802B, 802C to cause compression distraction of the first bone B1 and the second bone B2, as previously described. In some embodiments, the method 900 also includes harvesting 905 a plug of tissue from the joint space and inserting 906 a graft 530 into the joint space JS after harvesting 905 the plug of tissue. Harvesting 905 the plug of tissue and inserting 906 the graft 530 may both be performed before inserting the plug 200, 520, 600, 803A, 803B, 803C into the plug opening 102, 512, 702, 802A, 802B, 802C. In some embodiments, the plug of tissue is harvested 905 from the joint space JS and/or the graft 530 is inserted into the joint space JS through the plug opening 102, 512, 702, 802A, 802B, 802C without the plug 200, 520, 600, 803A, 803B, 803C inserted therein.
[0041] While this invention has been described with respect to at least one embodiment, the present invention can be further modified within the spirit and scope of this disclosure. This application is therefore intended to cover any variations, uses, or adaptations of the invention using its general principles. Further, this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains and which fall within the limits of the appended claims.