Primary THR 1%
Revision THR 3%
DDH 5%
Sciatic nerve 90% of nerve palsy
Other
- femoral nerve
- CPN
- ulna / radial nerve from positioning
Direct
Laceration
- exposure / sciatic and superior gluteal nerve
- drill reamer / obturator nerve
- spike of cement / obturator nerve
Type I: Undisplaced avulsion fracture
Type II: Anterior portion displaced & hinged
Type IIIA: Displaced
Type IIIB: Displaced & Rotated
Idiopathic condition of the immature femoral capital epiphysis involving varying degrees of osteonecrosis
AKA
- Legg-Calve-Perthes disease
- coxa plana
Described in separate publications in 1912 by
- Legg (Boston)
- Calve (France)
- Perthes (Germany)
M: F 4:1
1 in 740 males
It was described in 1983 by Dr. Nora, and is sometimes called Nora's disease or Nora's lesion
Bizarre parosteal osteochondromatous proliferation
Rare lesion
- occurs most commonly in the hands and feet
Adults in their 20's and 30's
Males = Females
Definition
Infection of bone 2° blood-borne bacteria
Most common children
- peak 10 years
True haematogenous OM rare in adults
- usually involves spine
M: F 2:1
Most common femur & tibia