Management
Tsukayama Classification
Osteoarthritis
- abnormal morphology
- loss of head neck offset
- bony impingement on acetabulum
AVN
1. Standard trochanteric osteotomy
2. Sliding trochanteric osteotomy
3. Extended trochanteric osteotomy
Ranges
- up to 4%
Focal pain
- typically anterolateral thigh
- often tender
- corresponds to tip of stem
1. Instability
Types
- early
- late / failed bony ingrowth
Cause
- micromotion at distal stem
Patient > 70
Gjertsen et al JBJS Am 2010
- 4335 patients > 70 with displaced subcapital fractures
- minimum 1 year follow up
- 1 year mortality same in each group / 25%
- 22% reoperation in ORIF v 3% in hemiarthroplasty
- more pain / higher dissatisfaction / lower quality life in ORIF group
Hemiarthroplasty
- unipolar monoblock
- unipolar modular
Femur
Multiplanar deformity
- worsend by previous surgery
- may require osteotomy
Acetabulum
Dysplasia often present
- not as severe as in DDH
LLD
Can be significant
Abductors
Have been short for long time
- difficult to restore length
Chronic, non metabolic bone disorder
Characterised by increased bone resorption, bone formation and remodelling
Rare < 40
1 – 3 % population over 60
M > F
Unknown
Paramyxovirus implicated
- measles
- RSV
- canine distemper virus
Electron Microscope
Extra-pelvic blood vessels
Femoral Artery
MCFA
LCFA
Profunda Femoris
Obturator artery
Intrapelvic vessels
External iliac artery and vein
Obturator artery
Superior and inferior gluteal
Anatomy
- anterior division of common iliacs / L5-S1