Chapter 83 - Distal Biceps and Triceps Tendon Injuries

Question 1

which head of the biceps is the stronger flexor?

Answer 1

the short head

Question 2

which head of the biceps is the stronger supinator?

Answer 2

long head

Question 3

biggest risk factors for tearing distal biceps?

Answer 3

anabolic steroid use (9x risk)
smoking (7.5x risk)

Question 4

what percentage of supination and flexion will you lose if distal biceps is treated non-op?

Answer 4

40% supination
30% flexion

Question 5

biomechanical studies have demonstrated what in regard to fixation?

Answer 5

biomechanically - suture buttons are stronger than anchors or interference screws, but clinical studies have shown no difference

Question 6

factors associated with loss of supination strength after distal biceps repair?

Answer 6

non-anatomic (anterior) site of tendon reattachment
decreased height of radial tuberosity (making a trough for the tendon)
supinator mm fatty atrophy (from splitting supinator for a 2 incision technique)

Question 7

what associated condition will people with a triceps tear commonly complain of?

Answer 7

ulnar neuropathy

Question 8

triceps tears <50% - what is the treatment?

Answer 8

• trial of non-op