McG 37: Hallux Varus Flashcards Preview

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Flashcards in McG 37: Hallux Varus Deck (12):
1

what happens if hallux varus is not corrected

osteoarthritis develops

2

causes for Hallux varus

-overaggressive splint age of the hallux post-op
-overaggressive lateral release w/ or w/o lateral sesamoidectomy
-disruption of the muscle tendon balance to favor the pull of the ABH

3

factors contributing to hallux varus

-long or short 1st MT segment
-rounded 1st MT head
-negative IMA
-ligamentous laxity
-inadvertant staking of the sagittal groove of the 1st MT head

4

hallux varus occurrence

2-17%

5

hallux varus can be divided into what 2 categories

static and dynamic

6

causes of static hallux varus

osteotomies: Silver, MTPJ arthroplasty

7

causes of dynamic hallux varus

-muscle tendon imbalance favoring the ABH (see long explanation in notes)

8

causes of overcorrection in bunion sx

-excessive medial exostecotmy
-overaggressive medial capsulorrhaphy
-overaggressive plantar lateral release
-overaggressive osseous correction
-overzealous postoperative bandaging
-combo of the above

9

reversal for a medial luxated joint

medial capsulotomy and digital splinting

10

reversal for a subluxed hallux

complete ST release and a MT osteotomy

11

what do you do if the deformity is reducible, but the normal morphology of the MT head has been lost?

reconstruction of the articular groove for the hallux and tibial sesamoid

12

if motion is restricted and/or crepitant when the hallux is seated in neutral

fusion