Survival analysis of an uncemented ceramic acetabular component in total hip replacement

Abstract

Follow-up examinations of 67 implants of cement-free ceramic sockets show the need for an exact definition of failure, to warrant comparable evaluations of results. Statistical survival analysis offers the possibility of presenting both the incidence of failures and the dates of their occurrence. If only revision surgery with removal of the socket is considered to be a failure, our material shows the "survival quota" of the ceramic socket after 8 years to be 96.7% +/- 2.2%. If radiological signs of loosening are included in the evaluation of failures, the "survival quota" of the stable implants is reduced to 81.9% +/- 6.9%.

Fracture Propagation Propensity of Ceramic Liners During Impingement-Subluxation

“…This led to optimization of parameters such as component size, shape, taper angle, surface roughness and neck length. These design modifications, along with improvements in material engineering and in proof testing, decreased femoral head fracture rates from 13% for first-generation alumina heads [12], to rates in the range of 0.004% [13] for contemporary heads. In contrast, for ceramic liners systematic analysis regarding fracture risk mitigation has been much more limited.…”

Squeaking Hips

“…eramic-on-ceramic bearings for total hip arthroplasty were pioneered by Boutin in France during the 1970s 1 . The first generation of alumina ceramic experienced unacceptably high fracture rates 2,3 . In the 1980s and 1990s, advances in ceramic manufacturing produced alumina components of higher density and smaller grain size, substantially reducing the risk of fracture.…”

Ceramic-Ceramic Bearing Decreases Osteolysis: A 20-year Study versus Ceramic-Polyethylene on the Contralateral Hip

“…To reduce wear, Boutin [7] reported the use of alumina-on-alumina bearing surfaces in total hip arthroplasty (THA) in 1972. There have been many subsequent reports [3,4,9,12,18,19,25,31,32] regarding the use of ceramic total hip systems. In principle ceramics have the potential for low rates of wear compared to metal-on-polyethylene, and in one study alumina-ceramic bearings demonstrated the lowest rates of in vivo wear as compared with metal -polyethylene combination [20].…”