Total knee prosthesis

Carbon Fibers. Indeed, carbon fiber reinforced PE and a heat pressed PE have shown relatively poor wear resistance when used as the tibial components of total knee prosthesis (23). 

The decreased coagulation FVIII level occurred postoperatively in a patient receiving rAHF-PFM via continuous infusion for placement of total knee prosthesis. The clearance rate increased 10 days... 

Sanzen L., A. Sahlstrom, C.R Gentz, and I.R. Johnell. 1996. Radiographic wear assessment in a total knee prosthesis. 5- to 9-year follow-up study of 158 knees. 7 Arthroplasty 11 738-742. 

Thadani P.J., K.G. Vince, S.G. Ortaaslan, et al. 2000. Ten- to 12-year followup of the Insall-Burstein I total knee prosthesis. Clin Orthop 380 17-29. 

Rose, R.M., Ries, M.D., Paul, I.L., Crugnola, A.M. and Ellis, E. (1984) On the true wear rate of ultrahigh molecular weight polyethylene in the total knee prosthesis, J. Biomed. Mater. Res., 18, 207-224. 

Rgure 8.7 Surface of a UHMWPE inlay with defects from a total knee prosthesis ... 

Thadani PJ, Vince KG, Ortaaslan SG, Blackburn DC, Cudiamat CV. Ten- to 12-year follow-up of the Insall-Burstein 1 total knee prosthesis. Clin Orthop 2000 November 380(38O) 17-29. 

Oonishi H, Kim SC, Kyomoto M, Masuda S, Asano T, Clarke IC. Change in UHMWPE properties of retrieved ceramic total knee prosthesis in clinical use for 23 years. J Biomed Mater Res B Appl Biomater 2005 August 74(2) 754-9. 

Li G, Most E, Sultan PG, Schule S, Zayontz S, Park SE, Rubash HE. Knee kinematics with a high-flexion posterior stabilized total knee prosthesis an in vitro robotic experimental investigation. 7 Bone Joint Surg [Am] 2004 86-A(8) 1721-9. 

The prosthesis for total knee joint replacement consists of femoral, tibial, and patellar components. Compared to the hip joint, the knee joint has a more complicated geometry and movement biomechanics, and it is not intrinsically stable. In a normal knee, the center of movement is controlled by the geometry of the ligaments. As the knee moves, the ligaments rotate on their bony attachments and the center of movement also moves. The eccentric movement of the knee helps distribute the load throughout the entire joint surface [Burstein and Wright, 1993]. 

Total knee replacements can be implanted with or without cement, the latter relying on porous coating for fixation. The femoral components are typically made of CoCr alloy and the monolithic tibial components are made of UHMWPE. In modular components, the tibial polyethylene component assembles onto a titanium alloy tibial tray. The patellar component is made of UHMWPE, and a titanium ahoy back is added to components designed for uncemented use. The relatively small size of the pateUar component compared to the forces that travel through the extensor mechanism, and the small area of bone available for anchorage of the prosthesis, make the pateUa vulnerable. 

Seedhom, B.B., Longton, E.B., Dowson, D., and Wright, V. Biomechanics background in the design of total replacement knee prosthesis. Acta Orthop. Belgica Tome 39, Ease 1,164-180,1973. 

Preoperative (A) and [xjstoperative (B) radiographs of a Total Condylar knee prosthesis. The components are well [xjsitioned. (Reprinted with permission from Walker, RS. 1977. Human joints and their artificial replacements. Springfield, IL CC Thomas Publisher.)... 

Freeman M.A., S.A. Swanson, and R.C. Todd. 1973. Total replacement of the knee using the Rreeman-Swanson knee prosthesis. Clin Orthop 94 153-170. 

Insall J., W.N. Scott, and C.S. Ranawat. 1979. The total condylar knee prosthesis. A report of two hundred and twenty cases. / Bone Joint Surg 61 173-180. 

Vince K.G., J.N. Insall, and M.A. Kelly. 1989. The total condylar prosthesis. 10- to 12-year results of a cemented knee replacement. Bone Joint Surg 71 793-797. 

Kunz, M., et al., Development and verification of a non-CT based total knee arthrr lasty system for the LCS prosthesis, in First Annual Meeting (fCAOS International, 2001, Davos, Switzerland. 

In the medical praxis, UHMWPE have been used successfully as one half of the bearing couple (against metallic alloys or ceramics) in total hip and total knee joint replacements crosslinked under irradiation [82]. Even y-irradiated UHMWPE at doses higher than 100 kGy presents the incipient ffacmre development [83], the alkyl macroradicals are involved in crosslinking and in a smaller proportion they promote oxidation [84, 85]. The prosthesis manufactures by the irradiation of UHMWPE have long durability, because the application of radiation treatment induces an increased crystallinity and promotes sterilization in the whole volume of material. 

Contact dermatitis has also been reported in a 62-year-old man who had had a total knee arthroplasty with a chromium-containing prosthesis [45 ]. 

YAMAMOTO, S. Total knee replacement with the Kodama-Yamamoto knee prosthesis, Clin. Orthp., 1979, 145, 60-67. 

Moore DJ, Freeman MAR, ReveU PA et al (1998) Can a total knee replacement prosthesis be made entirely of polymers 1 Arthroplasty 13 388-395... 

The most common application of alumina bioceramics is in the area of orthopaedics as component in hip and knee prostheses. The first clinical use of total hip prosthesis with an aliunina head and alumina socket was in 1971. The long term coefficient of the pair alumina/alumina and the wearing down index decrease with time and approaches the value of a normal healthy joint [18],... 

Abstract— There are little attention given for Patello-femoral joint s design although it is highly loaded part of a total knee arthroplasty. Finite element method proved the poor design leads to excessive stresses within the polyethylene of the patellar unit during flexion of the knee. In this study, patellar prosthesis with more suitable with the femoral unit than the other design tested were developed. The experiment done has proved that the use of patella and femoral models developed can be use to predict the contact area between them. 

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