HAV ANGLES

Question 1

normal intermetatarsal angle (IMA)?

in adducted foot?

Answer 1

8-12 degrees

8-10 degrees

*bisection of 1st and 2nd metatarsals

Question 2

metatarsus adductus angle (MAA) for rectus foot?

Answer 2

<15 degrees

*Relationship between long axis of 2nd met and the longitudinal bisection of the lesser tarsus

Question 3

metatarsus adductus angle (MAA) for adducted foot?

Answer 3

> 15 degrees

*Relationship between long axis of 2nd met and the longitudinal bisection of the lesser tarsus

Question 4

relationship between long axis of 2nd met and longitudinal bisection of the lesser tarsus?

normal adult?
pathologic?

Answer 4

5-17 degrees per McGlamry

20 degrees plus

Question 5

how to measure an accurate IMA in the presence of MA?

Answer 5

IMA + (MAA-15 degrees) = true IMA

Question 6

alternative way to measure met adductus

bisection of 2nd met and bisection of intermediate cuneiform

normal less than 24 degrees

Answer 6

engel’s angle

Question 7

whats the hallux abductus angle (HAA)?

Answer 7

10-15 degrees

Bisection of 1st metatarsal and
proximal phalanx of hallux

Question 8

hallux interphalangeus angle (HIPA)?

Answer 8

0-10 degrees

Bisection of the distal and
proximal phalanx of the
hallux

Question 9

proximal articular set angle (PASA)?

Answer 9

0-8 degrees

relationship between
long axis 1st met and a
line connecting medial/lateral points of articular surface of methead

Question 10

distal articular set angle (DASA)?

Rarely abnormal

relationship between long axis of phalanx and a line connecting medial/lateral points of articular surface of
base of phalanx

Answer 10

0-8 degrees

Question 11

metatarsal protrusion distance (MPD)?

Answer 11

+/- 2mm

length of 1st met compared to 2nd

Question 12

tibial sesamoid position,

normal?

Answer 12

1-4

position of sesamoid along axis of 1st metatarsal