Mechanical factors in loosening of Christiansen and Charnley arthroplasties

Wear of the acetabular socket: Comparison of polyacetat and polyethylene

“…Early results were promising and comparable to those of conventional hip prostheses (Sundal et al 1974, Goldie & Raner 1979. However, we now know that the Christiansen prosthesis is inferior to the Charnley prosthesis and other devices (Josefson et al 1981, Sudmann et al 1983, Alho et al 1984, and it has been taken off the market.…”

The ultrastructure of the tissue surrounding the Christiansen total hip

“…A recently published experiment strongly supports such a mechanism in the sequence of events leading to loosening of wear-prone prostheses (Howie et al 1988). Activated macrophages are probably related to the severe osteolysis often observed in patients operated on with the Christiansen total hip (Alho et al 1984). Mathiesen et al (1986) suggested that an increased frictional torque was the most probable mechanism of loosening of the Christiansen socket.…”

Theories of wear and loosening in hip prostheses: Wear-induced loosening vs loosening-induced wear–a review

“…However, the clinical results were poor and about one third of these prostheses implanted in Sweden during the 1970's have been revised because of loosening (Ahnfelt et al 1990). Coninion findings at revision were jamming of the trunnion joint (Alho et al 1984). severe wear of the acetabular component (Sudmann et al 1983).…”