INTERPRETATION There was a clinical ly relevant association between early migration of acetabular cups  and late revision due to loosening .
BACKGROUND AND PURPOSE The association between excessive early migration of acetabular cups  and late aseptic revision has been scantily reported .
We therefore performed 2 parallel systematic review s and meta-analyses to determine the association between early migration of acetabular cups  and late aseptic revision .
Primary total hip arthroplasty with a proximally porous-coated femoral stem.
BACKGROUND The use of cementless , proximally porous-coated femoral stems for total hip arthroplasty has increased in popularity . The purpose of the present report was to examine the five to ten-year results associated with the use of a so-called second-generation circumferentially proximally porous-coated titanium-alloy stem . METHODS Between 1991 and 1994 , 123 Harris-Galante Multilock femoral stems were implanted in 101 patients . The average age of the patients at the time of surgery was 53.8 years . The patients were followed prospect ively and were reevaluated at a minimum of five years postoperatively . No patient was lost to follow-up . Twenty-five patients ( thirty hips ) were interviewed by telephone , and four patients ( five hips ) died during the study period because of problems that were unrelated to the operation . The remaining seventy-two patients ( eighty-eight hips ) had a minimum of five years of clinical and radiographic follow-up . RESULTS The average duration of follow-up was seventy-eight months . At the time of the most recent follow-up , the average Harris Hip Score was 95 points . Eighty-seven ( 99 % ) of eighty-eight stems were biologically stable , with eighty-four hips ( 95 % ) having osseous ingrowth and three hips ( 3 % ) having stable fibrous fixation . One stem was revised because of loosening . Thirty-three hips ( 38 % ) had minimal proximal osteolysis , and no hip had diaphyseal osteolysis . Seventy-two hips ( 82 % ) had some degree of stress-shielding in the proximal metaphysis , but only two hips had cortical resorption . None of these patients required additional surgery , and all reported a satisfactory outcome . CONCLUSIONS Given the young age and high activity level of these patients , this stem fared well : the levels of patient function and satisfaction were high , the rates of loosening and revision were very low , and distal osteolysis did not occur . Osseous fixation occurred reliably . Proximal stress-shielding was seen but did not seem to be clinical ly important
INTERPRETATION There was a clinical ly relevant association between early migration of acetabular cups  and late revision due to loosening .
BACKGROUND AND PURPOSE The association between excessive early migration of acetabular cups  and late aseptic revision has been scantily reported .
We therefore performed 2 parallel systematic review s and meta-analyses to determine the association between early migration of acetabular cups  and late aseptic revision .