Aseptic Loosening of Cemented Total Arthroplasties of the Hip in Relation to Positioning of the Prosthesis:New Utilization of the Tschuprow-Cramer Statistical Test

Abstract
A statistical study of 1200 McKee-Farrar cemented total prostheses of the hip demonstrated the importance of a horizontal position of the cup and a valgus position of the prosthetic stem, in avoiding aseptic loosening of the prosthetic parts. A new test (the Cramer test) showed that a statistical bond exists between the position of the prosthesis and the occurrence of aseptic loosening.

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