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US 2014/0277546 A1Published application
Tibial trial instruments for setting offset
AssigneeDepuy (Ireland)
InventorsLisa M. Major, Ryan C. Keefer
Life of this patent
Estimating the term…
Abstract
An orthopaedic surgical instrument assembly is disclosed. The assembly includes a tibial base trial adapted to be positioned on a surgically-prepared proximal end of a patient's tibia, a base fastener, and a stem adaptor secured to the base fastener. The stem adaptor includes a first adaptor body engaged with a lower surface of the tibial base trial and a second adaptor body pivotally coupled to the first adaptor body. A stem trial is removably coupled to the second adaptor body of the stem adaptor.
Claims20
An orthopaedic surgical instrument assembly, comprising:
- a tibial bearing trial including an articulation surface and a bottom surface opposite the articulation surface,
- a tibial base trial adapted to be positioned on a surgically-prepared proximal end of a patient's tibia, the tibial base trial includes an upper surface engaged with the bottom surface of the tibial bearing trial,
- a base fastener attached to the tibial base trial, the base fastener including a shaft configured to rotate relative to the tibial base trial, and
- a stem adaptor secured to the shaft of the base fastener, the stem adaptor including (i) a first adaptor body engaged with a lower surface of the tibial base trial, the first adaptor body defining a first axis, and (ii) a second adaptor body pivotally coupled to the first adaptor body, the second adaptor body defining a second axis extending parallel to the first axis,
- wherein when the second adaptor body is in a fixed position, the first adaptor body is configured to pivot relative to the second adaptor body to move the first axis a circular path about the second axis.
2 more elements
An orthopaedic surgical instrument assembly, comprising:
- a tibial base trial adapted to be positioned on a surgically-prepared proximal end of a patient's tibia, the tibial base trial including an upper surface, a lower surface positioned opposite the upper surface, a convex curved anterior surface extending between the upper surface and the lower surface, and a concave posterior surface extending between the upper surface and the lower surface,
- a base fastener including (i) a button head positioned above the upper surface of the tibial base trial, (ii) a shaft extending downwardly from the button head through the tibial base trial, and (iii) a sleeve secured to the shaft below the lower surface of the tibial base trial such the tibial base trial is retained between the button head and the sleeve of the base fastener,
- a stem adaptor secured to the shaft of the base fastener, the stem adaptor including (i) a first adaptor body engaged with a lower surface of the tibial base trial, the first adaptor body defining a first axis, and (ii) a second adaptor body pivotally coupled to the first adaptor body, the second adaptor body defining a second axis offset from the first axis, and
- a stem trial removably coupled to the second adaptor body of the stem adaptor.
1 more element
An orthopaedic surgical instrument assembly, comprising:
- a tibial bearing surface trial including an articulation surface,
- a shim secured to the tibial bearing surface trial,
- a tibial base trial adapted to be positioned on a surgically-prepared proximal end of a patient's tibia, the tibial base trial includes an upper surface engaged with a bottom surface of the shim,
- a base fastener including (i) a button head positioned above the upper surface of the tibial base trial, (ii) a shaft extending downwardly from the button head through the tibial base trial, and (iii) a sleeve secured to the shaft below the lower surface of the tibial base trial such the tibial base trial is retained between the button head and the sleeve of the base fastener,
- a stem adaptor secured to the shaft of the base fastener, the stem adaptor including (i) a first adaptor body engaged with a lower surface of the tibial base trial, the first adaptor body defining a first axis, and (ii) a second adaptor body pivotally coupled to the first adaptor body, the second adaptor body defining a second axis offset from the first axis, and
- a stem trial removably coupled to the second adaptor body of the stem adaptor.
3 more elements
Dependencies are inferred from the claim text.