title: The mechanism of loosening in cemented hip prostheses determined from long-term results.
abstract: Analysis of the mechanisms of loosening of cemented stems by radiological long-term follow-up in 129 cases. The most important finding was the failure of the cement-metal interface (29.5%), which was correlated significantly with osteolysis (31%). This suggests that the polyethylene debris reaches the bone through defects in the cement mantle (76.7%). In fact, the appearance of cement defects matches the number of identified osteolyses. This study shows that no permanent fixation can be achieved by the surface roughness of 2.0 microns Ra tried herein.
authors.affiliation: Department of Orthopaedics, University of Essen, Germany.
authors.forename: R T
authors.initials: RT
authors.lastname: Müller
authors.forename: I
authors.initials: I
authors.lastname: Heger
authors.forename: M
authors.initials: M
authors.lastname: Oldenburg
mesh_terms: D000328:Adult; D002484:Cementation; D006622:Hip Prosthesis; D006801:Humans; D008768:Methylmethacrylates / Q000627:therapeutic use; D011474:Prosthesis Design; D011475:Prosthesis Failure; D012189:Retrospective Studies
chemical_list: D008768:Methylmethacrylates