osteotomy

Aetiology

Trauma

RA

Rickets / osteomalacia

Issues

Horizontal joint line important

- < 10° tilt acceptable

> 10^o joint line tilt / due to femoral valgus

- continues to overload lateral compartment

Management Summary

Stage 0

Natural history mixed

- depends on size of lesion and diagnosis

- treat if becomes asymptomatic

- may benefit from bisphosphonates

Stage 1 / Normal X-ray, abnormal MRI

Forage: 80% G/E

Bisphosphonates

Stage 2 / Abnormal X-ray with cysts and sclerosis

A:  As for Stage I

Causes of Deformity

Metabolic Bone Disease

Paget's

Fracture Malunion

Previous Osteotomy

Options

1.  Intra-articular correction

2.  Simultaneous osteotomy and TKR

3.  Staged correction and TKR

1.  Intra-articular correction 

Indications

Femur

- draw line of mechanical axis of femur