Orthopaedic Wiki

Arthroplasty 1 month ago

Bearing Surfaces in Hip Arthroplasty (MoM, MoP, CoC, CoP)

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...

16 views Read article

Arthroplasty 1 month ago

Patellofemoral Complications in TKA

Commonest source of dissatisfaction after TKA. Includes anterior knee pain, maltracking, subluxation/dislocation, fracture, loosening of patellar component. Risk factors:...

11 views Read article

Arthroplasty 1 month ago

Instability after TKA

Accounts for ~20% of TKA revisions. Types: extension instability, flexion instability, mid-flexion instability, recurvatum. Causes: ligament imbalance, component malposit...

14 views Read article

Arthroplasty 1 month ago

Extensor Mechanism Failure after TKA

Includes quadriceps tendon rupture, patellar fracture, patellar tendon rupture, patellar component failure. Risk factors: previous surgery, patellar resurfacing, malalign...

12 views Read article

Arthroplasty 1 month ago

Arthrofibrosis after Arthroplasty

Defined as knee stiffness after TKA, usually 10° extension loss. Incidence: 3–6% after TKA. Causes: poor rehab, malposition, infection, scar tissue formation. Management:...

14 views Read article

Arthroplasty 1 month ago

Aseptic Loosening in Arthroplasty

Most common cause of late arthroplasty failure. Pathophysiology: particle-induced macrophage activation → cytokine release → osteolysis. Risk factors: polyethylene wear,...

12 views Read article

Arthroplasty 1 month ago

Complications of Total Hip Arthroplasty (THA)

Early complications: dislocation, infection, nerve injury, DVT/PE. Late complications: aseptic loosening, periprosthetic fracture, heterotopic ossification, osteolysis, i...

11 views Read article

Arthroplasty 1 month ago

Dislocation after THA — Risk Factors & Management

Incidence 1–3% after primary THA; higher in revision. Risk factors: posterior approach, malpositioned cup (anteversion 25°, inclination >60°). Patient factors: neuromuscu...

12 views Read article

Arthroplasty 1 month ago

Heterotopic Ossification after Hip Arthroplasty

HO = 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,...

15 views Read article

Tumor 1 month ago

Mega Prosthesis — Indications & Complications

Used for segmental bone loss after tumor resection or non-oncologic massive defects (failed revision arthroplasty, periprosthetic fractures). Common sites: distal femur r...

17 views Read article

Tumor 1 month ago

Expandable Prosthesis in Paediatric Oncology

Indicated for skeletally immature patients undergoing limb-salvage near a growth plate (e.g., distal femur/proximal tibia). Designs: minimally invasive magnetically drive...

19 views Read article

Arthroplasty 1 month ago

Total Elbow Arthroplasty — Indications & Outcomes

Indications: rheumatoid arthritis, post-traumatic arthritis, complex distal humerus fractures in elderly, tumor resection. Implant types: linked (semi-constrained), unlin...

17 views Read article