Catastrophic Femoral Head-Stem Trunnion Dissociation Secondary to Corrosion

Conclusions:
Although dissociation of the femoral head from the femoral trunnion following total hip arthroplasty is exceedingly rare, the prevalence may increase with longer follow-up. The dissociation is likely related to multiple factors, including a BMI of ≥30 kg/m2, male sex, and corrosion resulting from the use of a larger metal head with a neck length of greater than the default and a stem with high offset. It is critical that surgeons be able to recognize this mode of implant failure and appropriately prepare to remove the femoral component during revision surgery.

Level of Evidence:
Therapeutic Level IV. See Instructions for Authors for a complete description of levels of evidence.

Source: JBJS - August 16, 2016 Category: Orthopaedics Authors: Matsen Ko, L., Chen, A. F., Deirmengian, G. K., Hozack, W. J., Sharkey, P. F. Tags: Hip Scientific Articles Source Type: research