Optimum pressfit and proximal stress transfer with an improved modular design in total hip arthroplasty.
Femoral stem pressfit fixation depends on optimal proximal fit and stress transfer for long-term function.  Newer modular designs offer improvements that enhance proximal-distal sizing, anatomical canal fill in the proximal metaphysis, and better stress transfer resulting from more intimate cortical contact.  The Infinity modular femoral stem has the unique advantage of very proximal loading and gains fixation with a flexible stem that allows matching the variables of anteversion and proximal metaphyseal bow.
Stiehl
J B
JB
Department of Orthopaedic Surgery, Medical College of Wisconsin, Milwaukee.
D001824:Body Constitution; D005272:Femur Neck / Q000033:anatomy & histology; D006622:Hip Prosthesis / Q000009:adverse effects / Q000379:methods; D006801:Humans; D011474:Prosthesis Design; D013314:Stress, Mechanical