Press-fit stability of uncemented hemispheric acetabular components: a comparison of three porous coating systems.
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.
Markel
David C
DC
Department of Orthopaedic Surgery, Providence Hospital, Southfield, MI, USA.
Hora
Nivedita
N
Grimm
Michele
M
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
D020099:Coated Materials, Biocompatible