Drill and Jig Design to Improve Cement Fixation of the Acetabular Cup During Total Hip Replacement
نویسندگان
چکیده
Successful replacement of hips is the only solution for severe degenerative diseases such as osteoarthritis (Bird, 1995). During cemented fixation of the acetabular cup, anchorage holes are drilled in the acetabulum, then cement is introduced and pressurised to create cement pegs within the anchorage holes. During physiological activities, the bone cement interface of the acetabulum experiences high compressive and shear stresses (Harkess, 1998) and therefore the anchorage holes have a major contribution in improving the stability and the torsional strength of the cemented acetabular component. The efficiency of these holes depends upon the stress distribution around the neck of the cement peg.
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