A 
knee prosthesis, methods of implanting the 
prosthesis, method of treating 
arthritis of the knee, and a kit therefore are provided. The 
prosthesis answers many of the limitations of current knee prosthetic devices by providing a two-component (or alternatively, an optional three-component) device, as either a single structure, or as separate pieces. One of the components is constructed of 
low friction material, while the second is composed of a weight-dissipating 
cushioning material; the optional third component is constructed of 
low friction material. The 
prosthesis is initially attached to surrounding 
soft tissue in the knee by biodegradable sutures; it is held permanently in place by fibrous ingrowth into a porous collagen rim in the 
cushioning component. Major improvements provided by the present invention over currently available prostheses include minimal incisions, minimal or no bone cuts, minimal overall 
dissection (these improvements lead to shorter hospital stays and rapid 
rehabilitation and fewer potential for side effects), less prosthetic wear, greater 
longevity, fewer activity restrictions, able to be used on young, large, active patients, ease of revision, ease of conversion into a 
total knee arthroplasty if needed.