The use of a collar and precoating on cemented femoral stems is unnecessary and detrimental.
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.
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D001178:Arthroplasty / Q000379:methods; D001696:Biomechanical Phenomena; D001843:Bone Cements / Q000009:adverse effects; D005269:Femur / Q000000981:diagnostic imaging / Q000601:surgery*; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D010014:Osteolysis / Q000209:etiology; D011474:Prosthesis Design; D011859:Radiography; D013314:Stress, Mechanical
D001843:Bone Cements