The Influence of Artificial Ageing on the Stability of Ceramic Inserts in Sandwich Acetabular Cups
Ultrahigh molecular weight polyethylene (UHMWPE) was introduced in total hip arthroplasty by Charnley in 1962 as a bearing material articulating against a stainless steel ball head . This combination prooted to be highly successful clinically in the short to medium term. However, already early on wear of UHMWPE was recognized as a potential source of problems. Attempts to improve on this issue were the introduction of ceramic ball heads made from high purity alumina ceramics or elimination of UHMWPE altogether by the use of hard-on-hard bearing, either metal-on-metal or ceramics-on-ceramics.
KeywordsFatigue Titanium Migration Polyethylene Liner
Unable to display preview. Download preview PDF.
- 1.ASTM F2003-00: Standard guide for accelerated aging of ultra-high molecular weight polyethyleneGoogle Scholar
- 4.Komistek R, Sedel L, Hammill C, Northcut E, Walker S and Bizot P (2002) In vivo determination of hip joint separation in subjects having variable bearing surfaces. Trans. 48th Annual Meeting of the ORS:0127Google Scholar
- 5.Mittelmeier H (1975) Selbsthaftende Keramik-Metall-Verbund-Endoprothese. Med Orthop Technik 95:152–159Google Scholar
- 8.Zweymüller K (2000) Indikation und Kontraindikation für unterschiedliche Gleitpaarungen bei modularen Hüftpfannen. In: Willmann G, Zweymüller K (eds.) Bioceramics in hip joint replacement—Proceedings 5th international Ceramtec Symposium. Georg Thieme Verlag, Stuttgart, pp 2–8Google Scholar