Single-compartment knee arthroplasty

A system for preparing a knee joint may include a marker guide having a handle and a tibial marker portion extending from the handle. The handle may have a tibia alignment feature shaped to align with a first corresponding feature of the tibia, and a tibia marker guide shaped to guide movement of the marker instrument to provide a tibia marker on the tibia identifying a tibia location at which the tibia component is to be placed on the tibia. The marker guide may also have a femoral marker portion having a femoral alignment feature shaped to align the femoral marker portion with the tibial marker portion and/or the tibial marker, and a femoral marker guide shaped to guide movement of the marker instrument to provide a femoral marker on the femur identifying a position of the femur, the femoral component is to be placed on the femur at a femoral location. 一种用于制备膝关节的系统可以包括标记导向器，具有手柄和从手柄延伸的胫骨标记部分。手柄可具有成形为与胫骨的第一对应特征对齐的胫骨对齐特征，以及成形为引导标记器械的运动的胫骨标记导向器，以在胫骨上提供标识胫骨位置的胫骨标记，胫骨部件将在胫骨位置处放置在胫骨上。标记导向器还可以具有股骨标记部分，该股骨标记部分具有成形为