LinkSymphoKnee (LSK) Total Knee Replacement System Study - Ultra-congruent (UC)

The study will collect outcomes data on up to 600 patients from up to 3 sites using a legally marketed device according to its labeled intended use.

The study will collect:

• KOOS-JR
• Knee Society Score (KSS), 2011
• PROMIS Global Health
• PROMIS Physical Function
• PROMIS Pain Interference
• Surgery Satisfaction
• Forgotten Joint Score
• Radiographic findings
• Revisions.

Radiographic evaluations will be done through postoperative year 2. Other outcomes will be evaluated up to postoperative year 5.

Inclusion criteria

• 18 years or older, and skeletally mature; and
• Undergoing a primary TKA for one or both knees using the cemented LinkSymphoKnee knee system as part of the surgeon's standard of care.
• Able to read and understand English (because patient-reported outcome questionnaires are not validated for all potential other languages).

Exclusion criteria

• 80 years of age or older,
• Women who are pregnant at the time of surgery,
• History of joint sepsis,
• Bone defect that requires grafting,
• Previous history of bone disease (e.g., severe osteoporosis or osteomalacia) which in the surgeon's opinion is severe enough to compromise device fixation,
• Systemic conditions affecting bone density (e.g., inflammatory arthritis or renal disease) which in the surgeon's opinion are severe enough to compromise device fixation,
• A poorly functioning contralateral total knee replacement or a contralateral revision regardless of function.