aim

Background

UKA is intended to be load sharing

- correct to neutral or slight varus

HTO is a load-shifting / load-sparing procedure

- over correct into valgus

Advantages UKA

1. Rapid rehabilation

Reproduce the normal anatomical centre of rotation

Restore femoral offset

Maintain equal leg lengths

Usually template off normal hip

1. LLD

2. Offset

3. Femoral component

4. Acetabular component

5. Osteotomy / femoral seating

1. Neuropathy

2. Arteriopathy

3. Immunopathy

Most important aetiologic factor in foot disease. Due to :

- metabolic (glycosylation of nerves)

- ischaemic factors

Definition