Knee Osteoarthritis
Conditions
Keywords
Sagittal flexion angle, Posterior femoral offset, Cruciate-retaining total knee arthroplasty
Brief summary
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.
Interventions
PROCEDUREtotal knee arthroplasty
The surgeries were performed under general anesthesia. The medial parepatellar incision was introduced during the TKA. The femoral component size was selected according to the intro-operative measurement. The osteotomy was done according to the intramedullary guide and the cutting guide. After the proximal tibial osteotomy was finished, the cruciate-retaining Total Knee System was used. The lateral rotation of the femoral component was determined by the gap-balancing technique.
Sponsors
RenJi Hospital
Study design
Observational model
CASE_ONLY
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Healthy volunteers
No
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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Posterior Femoral Offset | 1 week after the surgery | The posterior femoral offset was defined as the maximal thickness of the posterior condyle projecting posteriorly to a straight line drawn as the extension of the posterior femoral shaft cortex on the medial-lateral position of the X-ray examination. |
| Posterior Femoral Offset Ratio | 1 week after the surgery | The posterior femoral offset ratio was defined as the maximal thickness of the posterior condyle projecting posteriorly to a straight line drawn as the extension of the posterior femoral shaft cortex, divided by the maximal thickness of the posterior condyle projecting posterior to a straight line drawn as the extension of the anterior femoral shaft contex on the medial-lateral position of the X-ray examination. |
Contacts
Primary ContactLin Du
Outcome results
None listed