Abstract: An arthroplasty system may include an arthroplasty prosthesis with a joint-facing side having an articular surface and a bone-facing side having a prosthesis attachment feature, a bone anchoring component, and a component attachment feature configured to translatably couple the bone anchoring component to the prosthesis attachment feature. In a first unlocked configuration, the component attachment feature and the prosthesis attachment feature may be translatably coupled with each other enabling the bone anchoring component to translatably move with respect to the bone-facing side of the arthroplasty prosthesis. In a second locked configuration, at least one of the component attachment feature and the prosthesis attachment feature may expand and secure a relative position of the component attachment feature to the prosthesis attachment feature and prevent the bone anchoring component from translatably moving relative to the bone-facing side of the arthroplasty prosthesis.

Abstract: An assembly may include a retractor pivotally coupled to a guide rod. The retractor may include a generally arcuate projection having a convex retractor surface, a concave cutting shield surface, and a retractor coupling feature. The guide rod may include an elongate member and a rod coupling feature that may be configured to engage the retractor coupling feature to pivotably couple the guide rod to the retractor. The assembly may be placed on a lateral side of a medial collateral ligament of a knee joint to retract the medial collateral ligament away from a tibial plateau of the knee joint and protect the medial collateral ligament during a tibial plateau resection procedure.