Bones of the Hand

Question 1

Which carpal bones make up the proximal row (lateral to medial)

Answer 1

Scaphoid
Lunate
Triquetrum
Pisiform

Question 2

Which carpal bones make up the distal row (lateral to medial)

Answer 2

Trapezium
Trapezoid
Capitate
Hamate

Question 3

Which is the most commonly fractured bone in the hand

Answer 3

Scaphoid

Question 4

What is the most common mechanism of a scaphoid fracture

Answer 4

FOOSH injury

Question 5

What is the greatest risk in a scaphoid fracture

Answer 5

Avascular necrosis

Question 6

Why is a scaphoid fracture at high risk of avascular necrosis

Answer 6

Retrograde blood supply which enters at distal end

Question 7

What is a Boxer’s fracture

Answer 7

Fracture of the 5th metacarpal neck

Question 8

What displacement do you get in a Boxer’s fracture

Answer 8

Distal part of the fracture is displaced anteriorly

Question 9

What is a Bennett’s fracture

Answer 9

Fracture of the 1st metacarpal base - usually extends into 1st carpometacarpal joint causing instability and subluxation

Question 10

What is the most common mechanism of injury of a Bennett’s fracture

Answer 10

Hyperabduction of the thumb