The Correlation Between Femoral Component Implanting Flexion Angle and Posterior Condyle Offset in Cruciate Retaining Total Knee Arthroplasty

Shanghai Jiao Tong University

Status: Not yet enrolling

Conditions: Knee Osteoarthritis

Treatments: Procedure: total knee arthroplasty

Study type: Observational

Funder types: Other

Identifiers

NCT05477745

IIT-2022-0048

Details and patient eligibility

About

The main aim and scope is making measurement and comparison about the femoral component posterior offset under different femoral component implanting flexion angle in cruciate retaining total knee arthroplasty. The results may identify the influence of the flexion component implanting flexion angle on the femoral component posterior offset.

Enrollment: 200 estimated patients

Sex: All

Volunteers: No Healthy Volunteers

Inclusion criteria

• The patients undertaken the primary cruciate retaining total knee arthroplasty;
• using the curiate retaining total knee arthroplasty prothesis from Biomet and Smith&Nephew;
• Complete surgery documents and radiologic data,such as standard X-ray postoperative both at antirior-posterior position and medial-lateral position(overlap of the medial and lateral femoral condyle).

Exclusion criteria

• The patients without standard X-ray postoperative both at antirior-posterior position and medial-lateral position(poor overlap of the medial and lateral femoral condyle);
• Complex primary total knee arthroplasty, using extra component such as trabecular metal,stem or et al.

Trial design

200 participants in 2 patient groups

The group that the sagittal flexion angle of the femoral component less than 4°

Description:

The patients' knees were taken on the X-ray examination after the total knee arthroplasty on the medial-lateral position. The flexion (positive degree) or extension (negative degree) angle of the femoral component according to the anterior femoral cortex was measured. The patients with the sagittal flexion angle of the femoral component less than 4° were categorized into this group.

Treatment:

Procedure: total knee arthroplasty

The group that the sagittal flexion angle of the femoral component over 4°

Description:

The patients' knees were taken on the X-ray examination after the total knee arthroplasty on the medial-lateral position. The flexion (positive degree) or extension (negative degree) angle of the femoral component according to the anterior femoral cortex was measured. The patients with the sagittal flexion angle of the femoral component over 4° were categorized into this group.

Treatment:

Procedure: total knee arthroplasty