Larger femoral heads in Hip Implants Lower Revision Risk in hip Arthroplasty

This difference was particularly noteworthy for the 32-millimeter group, where the risk was significantly reduced (P = 0.01). The risk of revision specifically for dislocation was also significantly reduced in the 32-millimeter (P = 0.03) and 36-millimeter (P = 0.03) head size groups. However, when it came to all-cause revision excluding dislocation, there were no significant differences between head sizes.

This extensive study indicates that using larger head sizes in THA may significantly reduce the risk of revision, particularly for dislocation. The research dismisses concerns related to the increased risk of early revision due to issues like aseptic loosening, polyethylene wear, or taper corrosion associated with larger heads. The results of this study, with a follow-up period of up to 17 years, are expected to have a profound impact on the decision-making process for orthopedic surgeons and could lead to better outcomes and increased patient satisfaction for those undergoing THA.

Source:

Matar, H. E., van Duren, B. H., Bloch, B. V., Berber, R., James, P. J., & Manktelow, A. RJ. (2023). Lower Risk of Revision with 32- and 36-millimeter Femoral Heads Compared with 28-mm heads in Primary Total Hip Arthroplasty: A Comparative Single-Center Study (10,104 Hips). In The Journal of Arthroplasty. Elsevier BV. https://doi.org/10.1016/j.arth.2023.10.042