Patent ID: 7160328

Claim:
A medical procedure, comprising: providing a prosthesis which includes (i) a body portion having a rear surface and a bearing surface, and (ii) an anchor peg including a shaft extending from said rear surface of said body portion, wherein said shaft includes a first shaft portion and a second shaft portion, and wherein said anchor peg includes a plurality of outwardly extending fins secured to said first shaft portion, and further wherein said plurality of outwardly extending fins each possesses a first diameter; creating an anchor hole in a natural bone so as to define an anchor hole sidewall, said anchor hole possessing a second diameter which is less than said first diameter; and positioning said anchor peg within said anchor hole so that: (A) each of said plurality of outwardly extending fins deforms so as to possess (i) a concave side which faces an open end of said anchor hole, and (ii) a convex side that faces a closed end of said anchor hole, and (B) said second shaft portion of said shaft of said anchor peg is positioned in contact with said anchor hole sidewall, wherein said first shaft portion of said shaft of said anchor peg possesses a third diameter, wherein said second shaft portion of said shaft of said anchor peg possesses a fourth diameter, and wherein said fourth diameter is greater than said third diameter.