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Flashcards in SCFE Deck (12):
1

RIsk factors for SCFE

- obesity
- femoral retroversion
- prior radiation therapy to the femoral head

2

Zone of SCFE injury:

hypertrophic zone, weakness in the perichondral ring

3

where does the neck displace?

anteriorly, superiorly
retroverts the epiphysis

4

associated endocrine disorders?

-hypothyroidism
- renal osteodystrophy

5

Loder classification

stable (can bear weight)
unstable (can't bear weight... risk of osteonecrosis is ~50%)

6

Southwick's angle classification

mild <30 deg
moderate 30-50 deg
severe >50 deg

7

Grading a SCFE:

I 0-33%
II 34-50%
III >50%

8

should you pin contralateral side?

yes if:
- obese male
- endocrine disorder
slip in a child <10 years of age

9

compolications of SCFE

- AVN femoral head 5% (50% in high grade slips
- chondrolysis from the screw
- slip progression (1-2%)

10

Age related risk for contralateral slip?

girls <10
boys <12

11

Screw thread relationship to failure?

16mm threads have higher frequency of femoral neck failure compared with 32mm or fully threaded screws

12

factors associated with AVN in SCFE:

unstable slip
- overreduction of slip
- attempted reduction of chronic slip
- pins in superolateral quadrant
- femoral neck osteotomy