Fatigue properties and stem subsidence in wire coil reinforced PMMA bone cement: a preliminary in vitro study

Article type: Research Article

Authors: Kim, Jeong K. | Park, Joon B.

Affiliations: Department of Biomedical Engineering, College of Engineering, The University of Iowa, Iowa City, IA 52242, USA

Abstract: The longevity of the cemented total hip joint replacement depends on the integrity of the cement fixation with respect to the interfaces of the metal stem and bone, and stress/strain transmission and its distribution. A simple stainless steel wire coil was placed around a tapered stem in a simulated cement mantle to counteract radial- and hoop-stress and dynamic compression-compression tests were performed. The results showed that the wire coil reinforced cement group had a higher fatigue (30%) and strength (35%) up to 105 loading cycles. The amount of stem subsidence during fatigue tests of the wire reinforced group was significantly reduced (2.5 times) compared with the control group.

Keywords: Wire coil, total hip joint replacement, bone cement, fatigue test, reinforcement, subsidence, creep

DOI: 10.3233/BME-1996-6606

Journal: Bio-Medical Materials and Engineering, vol. 6, no. 6, pp. 453-462, 1996