Prosthetic fixation technique

An implant for securing to a bone comprising:

• a medically inert joint prosthesis including a surface for cementing to the inside of a bone, and an outer joint bearing surface;
• means including at least one cannula having a length which is substantially greater than its diameter extending through said prosthesis from one of said surfaces to the other, for supplying medical cement under pressure to the interface between said prosthesis and the inner surface of the bone;
• and
• said prosthesis including means at one end of said cannula for making sealing engagement with an external conduit to be utilized in supplying said medical cement.

An apparatus for cementing implants to bones under pressure comprising:

• a medically inert implant having at least one cannula extending through it;
• clamping means for securing said implant to a bone;
• a source of medical cement under high pressure;
• a conduit connected from said source to said cannula;
• and
• means for supplying medical cement from said source through said conduit and through said cannula to the space between said implant and said bone while they are clamped together.

A method for fixing a joint prosthesis onto a long bone comprising the steps of:

• forming a cavity in one end of the bone;
• holding a joint prosthesis having a cement injection cannula extending through it onto said bone and extending into said cavity;
• providing a source of liquid cementing material under high pressure;
• attaching a conduit between said source of high pressure material and said cannula;
• injecting liquid cementing material under pressure from said source through said conduit and through the prosthesis and into said cavity;
• and
• maintaining the cementing material under pressure until the cementing liquid hardens into solid cement.