American Academy of Orthopedic Surgeons classification of periprosthetic hip fractures

Last revised by Andrew Murphy on 22 Nov 2017

Citation, DOI, disclosures and article data

Citation:

Glick Y, Murphy A, Weerakkody Y, American Academy of Orthopedic Surgeons classification of periprosthetic hip fractures. Reference article, Radiopaedia.org (Accessed on 19 Apr 2024) https://doi.org/10.53347/rID-52718

DOI:

https://doi.org/10.53347/rID-52718

Permalink:

https://radiopaedia.org/articles/52718

rID:

52718

Article created:

18 Apr 2017, Yaïr Glick ◉

Disclosures:

At the time the article was created Yaïr Glick had no recorded disclosures.

View Yaïr Glick's current disclosures

Last revised:

22 Nov 2017, Andrew Murphy ◉

Disclosures:

At the time the article was last revised Andrew Murphy had no recorded disclosures.

View Andrew Murphy's current disclosures

Revisions:

4 times, by 3 contributors - see full revision history and disclosures

Systems:

Musculoskeletal, Trauma

Sections:

Classifications

Tags:

cases

Synonyms:

American Academy of Orthopedic Surgeons classification
AAOS classification
AAOS classification of periprosthetic hip fractures

The American Academy of Orthopedic Surgeons classification of periprosthetic hip fractures divides the femur into three separate regions:

level I: proximal femur distally to the lower extent of the lesser trochanter
level II: 10 cm of femur distal to level I
level III: femur distal to level II

Fractures are classified accordingly:

type I: fractures proximal to the intertrochanteric line; usually occur during dislocation of the hip
type II: vertical or spiral fractures that do not extend past lower extent of the lesser trochanter
type III: vertical or spiral fractures that extend past lower extent of lesser trochanter, but not beyond level II; usually at the junction of middle and distal thirds of the femoral stem
type IV: fractures that traverse femoral stem in level III or lie within that area
- type IV-A: spiral fractures around the tip of the stem
- type IV-B: simple transverse or short oblique fractures
type V: severely comminuted fractures around the stem in level III
type VI: fractures distal to the tip of the stem in level III