Young adult
- 16 - 30 years old
- monoarticular disease
- heavy demand
Exhausted options of osteotomy
- risk of THA failure / multiple revision surgeries considered too high
Maximise bony contact
Minimise shortening
No good definition
- flexible flat foot
- medial longitudinal arch of foot in weight-bearing is in contact with ground or closer to ground than 'normal'
Common
- almost always bilateral
- strong familial tendency
Physiological
All infants have flat feet
1. Grice
2. Lambrinudi
3. Dunn
Definition
Extra-articular STJ fusion
- lateral bony block in sinus tarsi
- prevents valgus deformity
- allows undisturbed foot growth
Indication
Flexible valgus hindfoot in children 4 - 12
Polio
Painful restriction of dorsiflexion of the great toe
- secondary to degenerative changes in MTPJ
- initially pain and synovitis
- osteophytes don't form medially or on plantar aspect
Two peaks
1. Adolescence F > M
2. Middle Age M > F
Often Idiopathic
Trauma