Orthonotes
by the.bonestories
Menu
Defined as knee stiffness after TKA, usually 10° extension loss. Incidence: 3–6% after TKA. Causes: poor rehab, malposition, infection, scar tissue fo...
Most common cause of late arthroplasty failure. Pathophysiology: particle-induced macrophage activation → cytokine release → osteolysis. Risk factors:...
Early complications: dislocation, infection, nerve injury, DVT/PE. Late complications: aseptic loosening, periprosthetic fracture, heterotopic ossific...
Incidence 1–3% after primary THA; higher in revision. Risk factors: posterior approach, malpositioned cup (anteversion 25°, inclination >60°). Patient...
HO = abnormal bone formation in periarticular soft tissues after surgery or trauma. Incidence after THA: 20–50%; clinically significant in 5–10%. Risk...
Indications: rheumatoid arthritis, post-traumatic arthritis, complex distal humerus fractures in elderly, tumor resection. Implant types: linked (semi...
Wrist arthrodesis: gold standard for pain relief in advanced wrist arthritis; provides stability but sacrifices motion. Wrist arthroplasty: motion-pre...
Bone-conserving alternative to THA; resurfaces femoral head with metal cap. Indicated in young, active patients with OA, good bone stock, large femora...
Biologic response to wear particles (polyethylene > metal/cement) drives periprosthetic osteolysis via macrophage cytokine cascade. Risk factors: conv...
Classification guides treatment by considering fracture location, implant stability, and bone stock. THA femur: **Vancouver** (A: trochanteric; B1: ar...