Prospective Randomized Trial of Navigated and Conventional TKA

Prospective Randomized Trial of Navigated and Conventional TKA With Radiographic and CT Evaluations

Evaluation of the component position and kinematics after navigated and conventional Total Knee Arthroplasty.

1. Component position, kinematics After skin closure lateral x-rays were done in different flexion angles in order to evaluate the kinematic behaviour of the TKA.

   A full-length standing and a lateral radiograph as well as CT scans of the hip, knee and ankle joint were performed 5 to 7 days postoperatively before discharge.

2. clinical outcome Patient sociodemographic and anamnestic data were collected. The written interview was complemented by the EuroQol questionnaire (release EQ-5D) and the assessment of the patients' functional status (Knee Society Score) one week before surgery and 18 to 24 month after surgery.

Inclusion Criteria:

• primary or secondary osteoarthritis of the knee
• indication to TKA
• a mechanical axis between 20° varus and 5° valgus
• signed informed consent

Exclusion Criteria:

• previous hemi- or total arthroplasty
• severe instability that could not be treated with an unconstrained, cruciate-retaining TKA