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Visual intraoperative estimation of cup and stem position is not reliable in minimally invasive hip arthroplasty

Woerner, Michael ; Sendtner, Ernst ; Springorum, Robert ; Craiovan, Benjamin ; Worlicek, Michael ; Renkawitz, Tobias ; Grifka, Joachim ; Weber, Markus


Background and purpose - In hip arthroplasty, acetabular inclination and anteversion-and also femoral stem torsion-are generally assessed by eye intraoperatively. We assessed whether visual estimation of cup and stem position is reliable. Patients and methods - In the course of a subgroup analysis of a prospective clinical trial, 65 patients underwent cementless hip arthroplasty using a minimally ...


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