The use of a collar and precoating on cemented femoral stems is

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unnecessary and detrimental. Ling-R-S. Clin-Orthop. 1992 Dec. (285). P 73-83. Evidence is presented, largely from clinical sources, that a large collar is not necessary for the transfer of load to the proximal femur in cemented total hip arthroplasty. In fact, the use of a collar may have a number of deleterious side effects that cannot be predicted from theoretical analyses. Concern is also raised over the use of precoated femoral stems. Author-abstract.