Aseptic loosening of implants is now the most serious problem in total hip arthroplasty. Failure at the cement-bone interface is frequently seen when bone cement is used. For the purpose of preventing aseptic loosening, cementless implants are being used in increasing number. Thirteen total hip arthroplasties with PCA cementless implants were performed during the period of January 1985 to October 1985. In eight of the cases followed up for over three months, no clinical or radiolographical failure was observed.
