well as that which can be retrofit designed and or installed referring again to fig1 as well as to fig1 a a first selected knee joint application is illustrated and in which first and second opposing and respective end surface affixed multi layered wear and cushioning plugs or three dimensional shaped bodies are generally shown by upper plug 10 and lower plug 12 respectively and which are mounted to reconditioned and opposing ends of first upper 2 and second lower 4 joint defining bones the present invention contemplates surgical reconditioning of existing joint defining bones however it is also envisioned that one or more of the joint plug designs of the present invention can also be integrated into an artificial bone incorporated into the overall implant as is also shown in the cutaway views of fig2 a and 2b each plug is constructed as a multi layer composite and three dimensional shaped article exhibiting a generally planar and typically non linear pattern having a specified thickness and including a central softer material layer 14 for plug 10 and 15 for plug 12 such as exhibiting an undulating or non linear configuration which matches that of an exterior most facing joint defining surface this further shown at 23 and 25 respectively for plug bodies 10 and 12 arranged on opposite sides of the central layers 14 and 15 are inner and outer hardened material layers shown at 16 and 18 for plug 10 and at 17 and 19 for plug 12 respectively as further shown in fig1 the construction of the inner mounting layers 16 of each plug 10 and 12 can.