Anterior Knee Pain Syndrome
Conditions
Keywords
Total knee arthroplasty, Patellar resurfacing, Lateral retinacular release, Anterior knee pain
Brief summary
The aim of this study is to assess the effect of systematic lateral retinacular release on anterior knee pain, as well as its impact on the functional and radiological outcomes after total knee arthroplasty with patellar resurfacing.
Detailed description
Anterior knee pain is an important cause of persistent pain after total knee arthroplasty. Lateral retinacular release has been proposed as a procedure to prevent anterior knee pain syndrome, based on the reduction of lateral tension and improving patellar tracking. However, its effect on anterior knee pain after total knee arthroplasty is not clear when it is not strictly needed to correct maltracking. The purpose of this trial is to evaluate the effect of systematic lateral retinaculare release on anterior knee pain, peformed during a total knee arthroplasty with patellar resurfacing.
Interventions
PROCEDURELateral retinacular release
During the implantation of a total knee arthroplasty a lateral retinacular release is performed in the intervention group
Sponsors
Hospital del Mar
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
TRIPLE (Subject, Investigator, Outcomes Assessor)
Eligibility
Sex/Gender
ALL
Age
40 Years to 90 Years
Healthy volunteers
No
Inclusion criteria
* diagnosis of knee osteoarthritis
Exclusion criteria
* prior major surgery on the same knee (high tibial or distal femoral osteotomy, patellar realignment) * important preoperative malalignment (varus or valgus \>15º or flexion deformity \>15º) * inability to sign informed consent
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Change from baseline in Anterior Knee Pain at one year after surgery | At the preoperative visit and at the 1-year follow up | Pressure pain threshold determined using pressure algometry |
| Change from baseline in Knee Pain measured by Visual Analogue Scale at one year after surgery | At the preoperative visit and at the 1-year follow up | The Visual Analogue Scale referred by the patients at rest, when walking and when going up and downstairs. Scored between 0 (no pain at all) and 10 (maximum pain the patient could imagine). |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Change from baseline in patellar pain and function at one year after surgery | At the preoperative visit and at the 1-year follow up | Patellofemoral score designed by Feller, distributed with a maximum of 15 points for the intensity of anterior knee pain, 5 points for quadriceps strength, 5 points for the ability to rise from a chair and 5 points for stair climbing ability |
| Change from baseline in knee fuction, measured by the Knee Society Score, at one year after surgery | At the preoperative visit and at the 1-year follow up | The Knee Society Score, being 0 the worst and 100 the best possible result |
Other
| Measure | Time frame | Description |
|---|---|---|
| Change from baseline in Patelar Height at one year after surgery | At the preoperative visit and at the 1-year follow up | Measured in the lateral radiographic view using the Caton-Deschamps index |
| Change from baseline in Patellar Tilt at one year after surgery | At the preoperative visit and at the 1-year follow up | Measured in the axial radiographic view, as the angle subtended by the anterior intercondylar line and the equatorial line of the patella preoperatively or a line drawn through the prosthesis-bone interface postoperatively |
Countries
Spain
Outcome results
None listed