Orthopedic implant augmentation and stabilization device

Details Orthopedic implant augmentation and stabilization device Orthopedic implant augmentation and stabilization device

A - Human Necessities

61

F

A61F 2/28 (2006.01) A61F 2/30 (2006.01) A61F 2/38 (2006.01) A61F 2/00 (2006.01) A61F 2/46 (2006.01)

Patent

CA 2145398

A prosthesis is provided for replacing a bone surface. The prosthesis includes an implant (10, 50, 70) having a surface (18, 52, 74) for abutting a bone, and an augment (20,56,78) configured to be attached to the surface (18, 52, 74) of the implant (10,50, 70) by bone cement (32) to compensate for bone loss. The augment (20,56) is formed to include an aperture (21, 61) therein de- fined by an inner wall (22,60). The prosthesis also includes a plastic peg (24,62) coupled to the implant (10, 50). The peg (24,62) is configured to enter the aperture (21,61) formed in the augment (20,56) and to engage the inner wall (22,60) of the augment (20,56) to retain the augment (20,56) in a spaced apart relation relative to the implant (10,50) to permit the implant (10,50) to be installed onto the bone before the bone cement cures. Alternatively, the surface (74) of the implant (70) is formed to include an aperture (82) therein, and a plastic retaining ring (86) located in the aperture (82) formed in the surface (74) of the implant (70). A metal peg (98) is coupled to the augment (78). The metal peg (98) is configured to enter the aperture (82) formed in the implant (70) and to engage the plastic retaining ring (86) therein to retain the augment (78) in a spaced apart relation relative to the im- plant (70).

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