Soft tissue balancing is the process of adjusting the tension of ligaments and other soft tissues around a joint so the joint moves smoothly and remains stable. In the knee, it commonly refers to balancing the tissues during knee surgery, especially total knee replacement. It can also describe non-surgical efforts to reduce uneven forces around the knee through rehabilitation strategies. The overall goal is a knee that tracks, bends, and straightens in a controlled and comfortable way.

Ligament balancing is the process of adjusting soft-tissue tension around a joint so the joint moves smoothly and feels stable. In the knee, it usually refers to balancing the collateral ligaments and surrounding capsule so the femur and tibia track correctly. It is most commonly discussed during knee replacement surgery, but the concept also applies to other knee procedures and rehabilitation planning. The goal is not “tight” or “loose,” but an appropriate, even tension that matches the person’s anatomy and the procedure being done.

Joint line restoration means re-establishing the knee’s normal “joint line” height and position. The joint line is the level where the femur (thigh bone) and tibia (shin bone) meet and move against each other. Joint line restoration is most commonly discussed in complex knee surgery, especially revision total knee replacement. It is used to improve knee mechanics when the original joint line has shifted due to arthritis, injury, or prior surgery.

Component malrotation is an unintended rotational misalignment of an implanted knee replacement part. It most commonly refers to femoral or tibial component rotation after total knee arthroplasty (knee replacement). It can affect how the kneecap tracks and how the knee feels during walking, stairs, or bending. Clinicians use the term when evaluating pain, stiffness, instability, or patellar symptoms after surgery.

Tibial rotation is the turning of the shin bone (tibia) relative to the thigh bone (femur) at the knee. It includes internal rotation (turning inward) and external rotation (turning outward). It is a normal part of walking, squatting, and changing direction. Clinicians use the term to describe knee motion, knee stability, and alignment in injuries and arthritis.

Femoral rotation describes how the thigh bone (femur) turns inward or outward around its long axis. It can refer to a normal movement during walking, squatting, or pivoting, or to a measurable alignment pattern. Clinicians use it to discuss hip-to-knee mechanics, patellar (kneecap) tracking, and overall lower-limb alignment. It is commonly referenced in orthopedics, sports medicine, and physical therapy when evaluating knee and hip symptoms.

Posterior tibial slope is the backward tilt of the top surface of the tibia (shinbone) where it meets the femur (thighbone). It is a measurable alignment feature of the knee, not a diagnosis by itself. Clinicians most often discuss it when reading knee imaging or planning ligament and knee replacement surgeries. In plain terms, it describes how “angled” the upper tibia is from front to back.

Tibial slope is the tilt of the top of the shinbone (tibia) when viewed from the side. It describes how the tibial plateau (the tibia’s joint surface) angles relative to the bone’s shaft. It is commonly measured on knee X-rays and MRI scans. Clinicians consider it when evaluating ligament injuries and planning certain knee surgeries.

Patellar button sizing is the process of selecting the most appropriate size and thickness of a patellar implant (“button”). It is most commonly discussed during total knee arthroplasty (total knee replacement) when the patella is resurfaced. The goal is to match the implant to the patient’s patella and overall knee mechanics. It is a surgical decision step rather than a stand-alone treatment.

Tibial baseplate sizing is the process of choosing the correct size of the tibial baseplate implant used in knee replacement surgery. The tibial baseplate is the metal platform that sits on top of the shinbone (tibia) and supports the plastic bearing surface. Sizing aims to match the implant to a person’s bone shape to help the knee move smoothly and feel stable. It is most commonly discussed in total knee arthroplasty (total knee replacement) and revision knee replacement planning.