Abstract
The sliding hip screw (SHS) has been used for the fixation of intertrochanteric hip fractures for decades. Newer devices have been designed to address persistent failures in SHS; however, the superiority of all new devices has not been established. We compared the stability of a classic SHS to a 2nd generation device. Intertrochanteric fractures were created in cadaveric and synthetic femurs, and then repaired with either a 1st generation SHS or a 2nd generation SHS. Fixation by both implants was tested by compressive loading. There was a significantly higher rate of failure via rotational instability of the proximal fragment (p < 0.05) with the 2nd generation SHS due to disengagement of an anti-rotational bushing mechanism. Further studies are needed to determine if this study translates to concerns for higher failure rates in the clinical setting, however our results suggest that there is no benefit to the use of this 2nd generation device.
| Original language | English |
|---|---|
| Pages (from-to) | 311-320 |
| Number of pages | 10 |
| Journal | International Journal of Medical Engineering and Informatics |
| Volume | 5 |
| Issue number | 4 |
| DOIs | |
| State | Published - 2013 |
Fingerprint
Keywords
- Biomechanics
- DHS
- Dynamic helical hip screw
- Dynamic hip screw
- Helical blade
- Intertrochanteric hip fracture
- Locking sliding hip screw
- Spiral blade
ASJC Scopus subject areas
- Biomedical Engineering
- Health Informatics
- Medicine (miscellaneous)
- Biomaterials
Cite this
Compressive loading causes unique mechanism of failure in second generation sliding hip screw. / Bethel, Monique; Levenda, Jeffrey; Hogg, Peter; Alge, Daniel; Chu, T.M. Gabriel; Mullis, Brian.
In: International Journal of Medical Engineering and Informatics, Vol. 5, No. 4, 2013, p. 311-320.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Compressive loading causes unique mechanism of failure in second generation sliding hip screw
AU - Bethel, Monique
AU - Levenda, Jeffrey
AU - Hogg, Peter
AU - Alge, Daniel
AU - Chu, T.M. Gabriel
AU - Mullis, Brian
PY - 2013
Y1 - 2013
N2 - The sliding hip screw (SHS) has been used for the fixation of intertrochanteric hip fractures for decades. Newer devices have been designed to address persistent failures in SHS; however, the superiority of all new devices has not been established. We compared the stability of a classic SHS to a 2nd generation device. Intertrochanteric fractures were created in cadaveric and synthetic femurs, and then repaired with either a 1st generation SHS or a 2nd generation SHS. Fixation by both implants was tested by compressive loading. There was a significantly higher rate of failure via rotational instability of the proximal fragment (p < 0.05) with the 2nd generation SHS due to disengagement of an anti-rotational bushing mechanism. Further studies are needed to determine if this study translates to concerns for higher failure rates in the clinical setting, however our results suggest that there is no benefit to the use of this 2nd generation device.
AB - The sliding hip screw (SHS) has been used for the fixation of intertrochanteric hip fractures for decades. Newer devices have been designed to address persistent failures in SHS; however, the superiority of all new devices has not been established. We compared the stability of a classic SHS to a 2nd generation device. Intertrochanteric fractures were created in cadaveric and synthetic femurs, and then repaired with either a 1st generation SHS or a 2nd generation SHS. Fixation by both implants was tested by compressive loading. There was a significantly higher rate of failure via rotational instability of the proximal fragment (p < 0.05) with the 2nd generation SHS due to disengagement of an anti-rotational bushing mechanism. Further studies are needed to determine if this study translates to concerns for higher failure rates in the clinical setting, however our results suggest that there is no benefit to the use of this 2nd generation device.
KW - Biomechanics
KW - DHS
KW - Dynamic helical hip screw
KW - Dynamic hip screw
KW - Helical blade
KW - Intertrochanteric hip fracture
KW - Locking sliding hip screw
KW - Spiral blade
UR - http://www.scopus.com/inward/record.url?scp=84886492803&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84886492803&partnerID=8YFLogxK
U2 - 10.1504/IJMEI.2013.057185
DO - 10.1504/IJMEI.2013.057185
M3 - Article
AN - SCOPUS:84886492803
VL - 5
SP - 311
EP - 320
JO - International Journal of Medical Engineering and Informatics
JF - International Journal of Medical Engineering and Informatics
SN - 1755-0653
IS - 4
ER -