Distal cortical hypertrophy following total hip arthroplasty.
Through a retrospective evaluation of 1,683 consecutive total hip arthroplasties performed exclusively by the senior author, a progressive occurrence of distal cortical hypertrophy of the bone on the medial and/or lateral portion of the femur was noted in 58 hips. All patients with evidence of hypertrophy had age, sex, weight, prosthetic design and alignment, radiolucency, and calcar resorption noted. A control was established by randomly selecting an equal number of patients without distal cortical hypertrophy for direct statistical comparison. It was concluded that hypertrophy following total hip arthroplasty is a result of abnormal stress distribution in the loaded femur and is not an indication of pain or loosening. Women with the stainless steel T-28 prosthesis were the most prone to hypertrophy.
Ritter
M A
MA
Center for Hip and Knee Surgery, Mooresville, IN 46158.
Fechtman
R W
RW
D005260:Female; D005269:Femur / Q000000981:diagnostic imaging / Q000473:pathology*; D006622:Hip Prosthesis; D006801:Humans; D006984:Hypertrophy; D008297:Male; D008875:Middle Aged; D011474:Prosthesis Design; D011859:Radiography; D012189:Retrospective Studies; D013193:Stainless Steel; D013314:Stress, Mechanical
D013193:Stainless Steel