title: Press-fit stability of uncemented hemispheric acetabular components: a comparison of three porous coating systems.
abstract: Cementless acetabular components require good initial fixation to allow bony in-growth. The initial press-fit stability, important for designs that do not rely on supplemental fixation, was examined for three designs with different porous coating systems: beads, fiber mesh, and plasma spray. The ability to withstand tangential loads was determined (maximum rim loads: 122-1730 N). The plasma-sprayed acetabular cups withstood the greatest tangential load within the specified range of motion of 150 microm (P<0.01). Differences in surface preparation of titanium acetabular cups may significantly affect the initial stability of the implants in rim loading.
authors.affiliation: Department of Orthopaedic Surgery, Providence Hospital, Southfield, MI, USA.
authors.forename: David C
authors.initials: DC
authors.lastname: Markel
authors.forename: Nivedita
authors.initials: N
authors.lastname: Hora
authors.forename: Michele
authors.initials: M
authors.lastname: Grimm
mesh_terms: D000077:Acetabulum / Q000502:physiology*; D019644:Arthroplasty, Replacement, Hip / Q000379:methods*; D001696:Biomechanical Phenomena; D020099:Coated Materials, Biocompatible; D006622:Hip Prosthesis; D006801:Humans; D011475:Prosthesis Failure; D018709:Statistics, Nonparametric; D016896:Treatment Outcome
chemical_list: D020099:Coated Materials, Biocompatible