Adjustable arthroplasty devices, systems, and methods

An arthroplasty system for replacing a natural articular surface on a bone, the arthroplasty system comprising:

• a bone anchoring component comprising a bone engagement surface securable to a resected surface of the bone;
• an arthroplasty prosthesis comprising:
• a joint-facing side comprising an articular surface;
• a bone-facing side opposite the joint-facing side;
• and
• a prosthesis attachment feature on the bone-facing side of the arthroplasty prosthesis comprising:
• an outer prosthesis projection configured to project away from the bone-facing side of the arthroplasty prosthesis;
• and
• a rotary recess formed within the outer prosthesis projection;
• and
• a component attachment feature positioned intermediate the prosthesis attachment feature and the bone anchoring component, the component attachment feature comprising:
• a component projection configured to project away from a prosthesis-facing surface of the component attachment feature and configured to be received within the rotary recess of the prosthesis attachment feature;
• wherein, when the component projection is received within the rotary recess:
• the component attachment feature is configured to rotatably couple with the prosthesis attachment feature on a proximal side of the component attachment feature;
• the component attachment feature is configured to couple with the bone anchoring component on a distal side of the component attachment feature;
• and
• the bone anchoring component is configured to rotatably move relative to the bone-facing side of the arthroplasty prosthesis.

An arthroplasty system for replacing a natural articular surface on a bone, the arthroplasty system comprising:

• a bone anchoring component comprising a bone engagement surface securable to a resected surface of the bone;
• an arthroplasty prosthesis comprising:
• a joint-facing side comprising an articular surface;
• a bone-facing side opposite the joint-facing side;
• and
• a prosthesis attachment feature on the bone-facing side of the arthroplasty prosthesis;
• and
• a component attachment feature positioned intermediate the prosthesis attachment feature and the bone anchoring component, the component attachment feature comprising a translation member;
• wherein:
• the component attachment feature is configured to couple with the prosthesis attachment feature on a proximal side of the component attachment feature;
• and
• the translation member is configured to translatably couple with the bone anchoring component on a distal side of the component attachment feature and enable the bone anchoring component to translatably move with respect to the bone-facing side of the arthroplasty prosthesis.