November 09, 2015
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Surgical approach in THA did not influence postoperative anteversion change

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Performing total hip arthroplasty through either the posterolateral or direct anterior approach did not affect postoperative anteversion change; however, the type of approach did affect stem sagittal alignment, according to study results.

Researchers evaluated 209 hips in 181 patients who underwent primary total hip arthroplasty using either the posterolateral (80 hips) or the direct anterior approach (129 hips) between January 2005 and December 2012.

Results showed a larger change in the postoperative femoral anteversion from native anteversion in the direct anterior approach group than in the posterolateral approach group. Researchers found a mean femoral tilt of approximately 9.2° in both groups. In the direct anterior approach group, more femoral components were implanted in more than 3° of flexed alignment, according to study results.

Univariate analysis showed significant correlations with postoperative change of anteversion for both surgical approaches. Although there was no significant correlation between preoperative femoral anteversion and the surgical approaches, multivariate analysis showed preoperative femoral anteversion had a significant correlation with postoperative anteversion. Researchers found the direct anterior approach more frequently had flexed implantation when it came to stem sagittal alignment. – by Casey Tingle

Disclosures: Abe reports no relevant financial disclosures. Please see the full study for a list of all other authors’ relevant financial disclosures.