Arthroplasty
4 months ago
UKA: isolated compartment OA, intact ACL/collaterals, correctible deformity; faster recovery, more natural kinematics. TKA: multicompartment disease, inflammatory arthrit...
Arthroplasty
4 months ago
Controversial: to resurface or not during TKA. Resurfacing: reduces anterior knee pain, avoids secondary resurfacing procedures. Non-resurfacing: avoids patellar complica...
Arthroplasty
4 months ago
Common indications: aseptic loosening, PJI, instability, stiffness, polyethylene wear, periprosthetic fracture, malalignment. Workup: exclude infection (ESR/CRP ± aspirat...
Arthroplasty
4 months ago
Primary driver of late osteolysis and aseptic loosening in TKA. Wear modes: adhesive/abrasive; delamination & pitting with high contact stress/oxidation in older PE. Risk...
Arthroplasty
4 months ago
Periprosthetic osteolysis = bone loss from wear particle-induced inflammation. Detected on radiographs as radiolucencies, cystic defects; CT useful for mapping, MRI (MARS...
Arthroplasty
4 months ago
Incidence rising with aging population and expanding TKA volumes. Common sites: distal femur (supracondylar), tibia (around keel/stem), patella (resurfaced patella). Clas...
Arthroplasty
4 months ago
Trunnionosis = corrosion/wear at head–neck modular junction of THA. Mechanism: fretting + crevice corrosion, leading to metal ion release. Clinical: unexplained pain, swe...
Arthroplasty
4 months ago
Main bearing couples: Metal-on-Polyethylene (MoP), Metal-on-Metal (MoM), Ceramic-on-Ceramic (CoC), Ceramic-on-Polyethylene (CoP). MoP: gold standard; risk of wear/osteoly...
Arthroplasty
4 months ago
Commonest source of dissatisfaction after TKA. Includes anterior knee pain, maltracking, subluxation/dislocation, fracture, loosening of patellar component. Risk factors:...
Arthroplasty
4 months ago
Accounts for ~20% of TKA revisions. Types: extension instability, flexion instability, mid-flexion instability, recurvatum. Causes: ligament imbalance, component malposit...
Arthroplasty
4 months ago
Includes quadriceps tendon rupture, patellar fracture, patellar tendon rupture, patellar component failure. Risk factors: previous surgery, patellar resurfacing, malalign...
Arthroplasty
4 months ago
Defined as knee stiffness after TKA, usually 10° extension loss. Incidence: 3–6% after TKA. Causes: poor rehab, malposition, infection, scar tissue formation. Management:...
