Gardner classification

Question 1

Stage 1

Answer 1

Undisplaced incomplete

Question 2

Stage 2

Answer 2

Undisplaced complete

Question 3

Stage 3

Answer 3

Incompletely displaced - medial trabeculae of distal fragment out of line with pelvic trabeculae (head in varus alignment)
Complete fracture

Question 4

Stage 4

Answer 4

Completely displaced - medial trabeculae of distal fragment in line with pelvic trabeculae (head normal alignment in acetabulum)
No apposition
Complete fracture

Question 5

Surgical intervention for stages

Answer 5

3/4: hemi or total arthroplasty as displacement = risk of AVN