Cementable hip prosthesis
AssigneeBristol-Myers Squibb Company
InventorsWalter Skripitz, Klaus-Dieter Schelhas
Life of this patent
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Abstract
A cementable thigh section of an acetabular prosthesis that has a shaft tapering toward its lower end, and on whose upper end is formed a flange-like support collar. Disposed in removable fashion below the support collar is an elastic spacer ring that at least partially covers the support collar. Worked in from the upper end of the thigh section is a boring that preferably branches out into branch borings, that comes out from the thigh section in the upper shaft portion, and serves for bringing the bone cement into the intermediate space between bone wall and thigh section after the thigh section is emplaced in the bone cavity.
Claims17
An implantable femoral prosthesis for cementation in a prepared intramedullary canal of a femur, said prosthesis comprising:
- an elongated shaft tapering from a proximal end to a distal end, said proximal end having a support collar formed thereon, said collar extending radially outwardly from said shaft and being configured to engage a resected surface of the femur, and said shaft including a circumferential groove formed therein adjacent and below said collar, and a longitudinal groove formed in a medial surface of the shaft and opening into said circumferential groove;
- and
- a separable elastic spacer ring configured to be disposed on said support collar and at least partially in the circumferential groove;
- and
- a main bore extending from the proximal end of the shaft, above the collar through the support collar downwardly into a trochanter region of the shaft and outwardly of a surface in a thigh region of the shaft.
An implantable femoral prosthesis for cementation in a prepared intramedullary canal of a femur, said prosthesis comprising:
- an elongated shaft tapering from a proximal end to a distal end, said proximal end having a split support collar formed thereon, said collar extending radially outwardly from said shaft and being configured to engage a resected surface of the femur, and said shaft including a circumferential groove formed therein adjacent and below said collar, and a longitudinal groove formed in a medial surface of the shaft and opening into said circumferential groove;
- and
- a separable elastic spacer ring configured to be disposed on said support collar and at least partially in the circumferential groove;
- and
- a main bore extending from the proximal end of the shaft, above the collar through the support collar downwardly into a trochanter region of the shaft and then branches out into a plurality of branch bores that exit the shaft.
Dependencies are inferred from the claim text.