Clinical Outcome After Total Knee Arthroplasty Using CR or PS Inlay

Prospective Randomized Comparison of Cruciate-retaining and Cruciate Substituting Surgical Technique for Total Knee Arthroplasty

Compare knee flexion after cruciate-retaining and cruciate substituting Total Knee Arthroplasty.

The aim of this study is to compare knee Flexion after cruciate-retaining (CR) and cruciate-substituting (posterior stabilized - PS) Total Knee Arthroplasty (TKA).

For this purpose, flexion and extension of the knee joint are measured using a goniometer preoperatively and up to ten years after surgery In addition, the clinical outcome will be assessed and evaluated using internationally recognised and evaluated scores (Knee Society Score, Oxford Knee Score, EQ5D, UCLA Activity Score).

Patients are randomized to receive a PS or CR TKA. Patients are assessed before surgery, after 3 months, 1 year, 2 years, 5 years, 7 years and 10 years postoperatively.

Inclusion Criteria:

• Indication for TKA with a non-linked, bicondylar total knee replacement
• written informed consent

Exclusion Criteria:

• Chronic pain patients
• Neuromuscular Diseases
• general illnesses that make mobilisation more difficult and/or prevent follow-up
• Known posterior cruciate ligament insufficiency
• Need for a higher degree of linkage
• BMI over 40 kg/m²
• Study doctor, his family, employees or other dependent persons