Orthonotes
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Controversial: to resurface or not during TKA. Resurfacing: reduces anterior knee pain, avoids secondary resurfacing procedures. Non-resurfacing: avoi...
Common indications: aseptic loosening, PJI, instability, stiffness, polyethylene wear, periprosthetic fracture, malalignment. Workup: exclude infectio...
Primary driver of late osteolysis and aseptic loosening in TKA. Wear modes: adhesive/abrasive; delamination & pitting with high contact stress/oxidati...
Periprosthetic osteolysis = bone loss from wear particle-induced inflammation. Detected on radiographs as radiolucencies, cystic defects; CT useful fo...
Incidence rising with aging population and expanding TKA volumes. Common sites: distal femur (supracondylar), tibia (around keel/stem), patella (resur...
Trunnionosis = corrosion/wear at head–neck modular junction of THA. Mechanism: fretting + crevice corrosion, leading to metal ion release. Clinical: u...
Main bearing couples: Metal-on-Polyethylene (MoP), Metal-on-Metal (MoM), Ceramic-on-Ceramic (CoC), Ceramic-on-Polyethylene (CoP). MoP: gold standard;...
Commonest source of dissatisfaction after TKA. Includes anterior knee pain, maltracking, subluxation/dislocation, fracture, loosening of patellar comp...
Accounts for ~20% of TKA revisions. Types: extension instability, flexion instability, mid-flexion instability, recurvatum. Causes: ligament imbalance...
Includes quadriceps tendon rupture, patellar fracture, patellar tendon rupture, patellar component failure. Risk factors: previous surgery, patellar r...