Low friction arthroplasty

Charnley, J., (Ed.) Low Friction Arthroplasty of the Hip, Springer-Verlag, Berlin, Heidelberg, New York (1979)... 

Charnley J. 1979. Low friction principle. In Low friction arthroplasty of the hip Theory and practice. Berlin Springer-Verlag. 

Charnley develops the technique of low friction arthroplasty (LFA). Usirig polytetrafluoroethylene (PTFE) as the bearing material (Charnley 1961) implants were fabricated either by Charnley in his home workshop or in the machine shop at Wrightington and chemically sterilized. 

Griffith M.J., M.K. Seidenstein, D. Williams, and J. Charnley. 1978. Socket wear in Chamley low friction arthroplasty of the hip. Clin Orthop 137 37-47. 

Within a decade of incorporating UHMWPE into TKA, this new form of surgery reached the same level of consistency and success as THA. However, the introduction of UHMWPE influenced the historical development of THA and TKA in different ways. With THA, Chamley had already perfected the design of the low friction arthroplasty, but the introduction of UHMWPE ensured the long-term durability of the prosthesis. With TKA, on the other hand, UHMWPE was accepted from the outset as the material of choice by implant designers, and the design concepts, not the material, were forced to evolve to achieve successful performance in the knee. 

Chamley, J. (1970), Total hip replacement by low-friction arthroplasty, Clin. Orthop. 72 7-21. 

Wroblewski, B.M., McCullagh, P.J. and Siney P.D. (1992) Quality of the surface finish of the head of the femoral component and the wear of the socket in long-term results of the Charnley low-friction arthroplasty. Engg in Med. 20, 181-183. 

Charnley develops the technique of low friction arthroplasty (LFA). Using PTFE as the bearing material 10, ... 

An example of a radiograph from a short-term implanted PTFE low friction arthroplasty is shown in Figure 4.4. This radiograph shows the initial orientation of the PTFE cup with respect to the pelvis. Initially, the femoral head is centered in the acetabular cup. 

Chamley and coworkers first developed radiographic techniques for evaluating the wear rate of UHMWPE acetabular components in patients. In 1973, Chamley and Cupic reported on the long-term wear performance the first cohort of patients to receive a UHMWPE component between November 1962 and December 1963 [26]. During this time period, 170 patients received a cemented low friction arthroplasty with an UHMWPE component a total of 185 acetabular cups were implanted. Because of the elderly population originally implanted with the components, many had died or were too infirm to travel to the chnic for follow-up examinations (over 2/3 of the patients were over 60 years of age at the time of implantation). Thus, only 106 out of the original 185 UHMWPE cups could still be evaluated after 9 or 10 years of implantation. The comph-cations for this series included a 4-6% rate of infection, 1-2% rate of mechanical loosening, and a 2% incidence of late dislocation. 

Wroblewski B, Siney P, Fleming P. Low-friction arthroplasty of the hip using alumina ceramic and cross-linked polyethylene a ten-year follow-up report. J Bone Joint Surg 1999 81B 54-5. 

Wroblewski BM. Wear and loosening of the socket in the Charnley low-friction arthroplasty. Orthop Clin North Am 1988 19 627-30. 

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