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a cylindrical body comprising an opening that extends from one end of the cylindrical body to the other end and external threads on an outside surface of the cylindrical body, the external threads configured to engage an internal surface of the bone tunnel; and |
179 |
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a tether locking feature configured to sit within the opening of the cylindrical body and couple a proximal end of the tether to the bone anchor. |
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17.The arthroplasty implant system of claim 13, wherein the arthroplasty implant seats within the bone pocket such that a top of the joint-facing articular surface is congruent with or below a surface of surrounding cartilage of the distal articular surface and the edge is below the surface of surrounding cartilage when the tether couples the arthroplasty implant to the bone anchor. |
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18. An articular implant system for a metatarsophalangeal joint, adjacent to a metatarsal of a patient, the system comprising: |
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an implant configured to seat within a bone pocket of an articular surface of a metatarsal, the implant comprising: |
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a convex distal surface; |
184 |
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a semispherical proximal surface that extends from the convex distal surface, the semispherical proximal surface having an implant radius that matches a bone radius of the bone pocket; and |
185 |
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wherein the semispherical proximal surface engages a surface of the bone pocket to retain the implant within the bone pocket. |
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19.The articular implant system of claim 18, further comprising: |
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a tether comprising a distal end and a proximal end, the distal end configured to connect the tether to the implant; |
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an anchor configured to secure the proximal end of the tether to the metatarsal away from the bone pocket; and |
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wherein the anchor and tether adjunctively secure the implant to the metatarsal. |
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20.The articular implant system of claim 18, wherein the implant comprises: |
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a distal body that comprises the convex distal surface; |
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a proximal body that comprises the semispherical proximal surface; and |
193 |
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a fastener configured to couple the distal body to the proximal body. |
194 |
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21. A method for deploying an articular implant in a metatarsophalangeal (MTP) joint of a patient, the method comprising: |
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forming a bone pocket in an articular surface of a metatarsal bone, the bone pocket sized and positioned to resect at least one osteochondral lesion; |
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forming a bone tunnel comprising a distal tunnel end and a proximal tunnel end, the bone tunnel configured such that the distal tunnel end connects the bone pocket and the proximal tunnel end connects to an external surface of the metatarsal bone; |
197 |
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passing a tether between the distal tunnel end and the proximal tunnel end of the bone tunnel, the tether having a distal tether end and a proximal tether end; |
198 |
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