Total knee arthroplasty patellar loosening
Classic history and presentation: Pain and swelling are the result of the dissociation of the patellar component from the patella, causing improper positioning. While patellar prosthesis loosening can occur in up to 5% of individuals after TKA, many individuals may be asymptomatic. In symptomatic patients, revision or excision of the patellar component is indicated.
Risk factors: Risk factors for patellar prosthesis loosening are joint-line elevation leading to patella baja and increased patella contact pressures, lateral release, poor implant fixation, obesity, osteoporosis, patellar osteonecrosis, patellar fracture, and infection.
T84.032A – Mechanical loosening of internal right knee prosthetic joint
281450006 – Loosening of total knee replacement
- Patellar fracture
- Periprosthetic fracture of the femur or tibia
- Periprosthetic infection
- Patellar prosthetic button rupture
- Patellar or quadriceps tendon tear
- Loosening or malpositioning of femoral or tibial prosthetic components
- Tibial polyethylene wear
- Patellar necrosis
- Patellar impingement (patellar clunk syndrome)
- Metal hypersensitivity