Orthonotes
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Incidence rising with aging population and expanding TKA volumes. Common sites: distal femur (supracondylar), tibia (around keel/stem), patella (resurfaced patella). Classification...
Arthroplasty | 👁 5 | 2 weeks agoTrunnionosis = corrosion/wear at head–neck modular junction of THA. Mechanism: fretting + crevice corrosion, leading to metal ion release. Clinical: unexplained pain, swelling, adv...
Arthroplasty | 👁 4 | 2 weeks agoMain bearing couples: Metal-on-Polyethylene (MoP), Metal-on-Metal (MoM), Ceramic-on-Ceramic (CoC), Ceramic-on-Polyethylene (CoP). MoP: gold standard; risk of wear/osteolysis; impro...
Arthroplasty | 👁 5 | 2 weeks agoCommonest source of dissatisfaction after TKA. Includes anterior knee pain, maltracking, subluxation/dislocation, fracture, loosening of patellar component. Risk factors: malrotati...
Arthroplasty | 👁 2 | 2 weeks agoAccounts for ~20% of TKA revisions. Types: extension instability, flexion instability, mid-flexion instability, recurvatum. Causes: ligament imbalance, component malposition, polye...
Arthroplasty | 👁 2 | 2 weeks agoIncludes quadriceps tendon rupture, patellar fracture, patellar tendon rupture, patellar component failure. Risk factors: previous surgery, patellar resurfacing, malalignment, ster...
Arthroplasty | 👁 3 | 2 weeks agoDefined as knee stiffness after TKA, usually 10° extension loss. Incidence: 3–6% after TKA. Causes: poor rehab, malposition, infection, scar tissue formation. Management: early man...
Arthroplasty | 👁 4 | 2 weeks agoMost common cause of late arthroplasty failure. Pathophysiology: particle-induced macrophage activation → cytokine release → osteolysis. Risk factors: polyethylene wear, malalignme...
Arthroplasty | 👁 3 | 2 weeks agoEarly complications: dislocation, infection, nerve injury, DVT/PE. Late complications: aseptic loosening, periprosthetic fracture, heterotopic ossification, osteolysis, implant wea...
Arthroplasty | 👁 3 | 2 weeks agoIncidence 1–3% after primary THA; higher in revision. Risk factors: posterior approach, malpositioned cup (anteversion 25°, inclination >60°). Patient factors: neuromuscular diseas...
Arthroplasty | 👁 3 | 2 weeks agoHO = abnormal bone formation in periarticular soft tissues after surgery or trauma. Incidence after THA: 20–50%; clinically significant in 5–10%. Risk factors: male sex, hypertroph...
Arthroplasty | 👁 3 | 2 weeks agoUsed for segmental bone loss after tumor resection or non-oncologic massive defects (failed revision arthroplasty, periprosthetic fractures). Common sites: distal femur replacement...
Tumor | 👁 5 | 2 weeks ago