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 .
Evaluation of Boneloc. Chemical and mechanical properties, and a randomized clinical study of 30 total hip arthroplasties.
We evaluated the mechanical , chemical and clinical properties of Boneloc cement using radiostereometry and a series of laboratory tests . Compared to a st and ard cement ( Palacos ) the new cement displayed reduced tensile strength , elastic modulus , curing and glass transition temperatures . The amount of MMA extracted during 3 weeks in methanol was smaller for the Boneloc , but the total amount of released monomers was larger . The adhesion to stainless steel and bone did not differ . Radiostereometric analysis during the first postoperative year in 30 patients r and omized to fixation of hip prostheses using either of the 2 cements displayed increased proximal migration of the cup and increased stem subsidence when Boneloc had been used . Part of the stem subsidence occurred inside the cement mantle . On the basis of these findings , we conclude that the inferior fixation in the Boneloc group is mainly caused by its mechanical properties . Other mechanisms , such as increased release of monomers , may also be 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 .