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US 12,758,396 B2Granted
Orthopaedic surgical system for installing a knee cone augment and method of using the same
AssigneeDepuy Ireland Unlimited Company
InventorsAnthony J. Webb, Lindsay L. Gilson, Jeremiah M. Lewis, Matthew D. Schmit, Wesley J. Gardner
Life of this patent
Estimating the term…
Abstract
An orthopaedic joint replacement system is shown and described. The system includes a number of prosthetic components configured to be implanted into a patient's knee. The system also includes a number of surgical instruments configured for use in preparing the bones of the patient's knee to receive the implants. A number of methods for using the surgical instruments to prepare the bones is also disclosed.
Claims15
An orthopaedic knee system, comprising:
- a pair of knee cone components configured to be installed into a surgically-prepared cavity in an end of a bone of a patient's knee, wherein each of the pair of knee cone components has a conically-shaped hollow body configured to receive a stem of a revision knee prosthesis therethrough, the hollow body of both of the pair of knee cone components has a first end that tapers downwardly to a second end, the first end of the hollow body defining an annular rim extending radially between an inner sidewall and an outer sidewall of the hollow body, wherein the annular rim of a first knee cone component of the pair of knee cone components has an inner diameter that is smaller than an inner diameter of the annular rim of a second knee component of the pair of knee cone components, and
- an impactor head configured to impact the pair of knee cone components during a surgical procedure, the impactor head comprising (i) a proximal surface configured to be secured to an impaction handle, and (ii) a terraced impact surface opposite the proximal surface, the terraced impact surface having an annular-shaped lead-in flange and a pair of annular-shaped impact flanges formed therein, each of the lead-in flange and the pair of impact flanges being concentric with one another and having a round planar distal surface that is orthogonal to a longitudinal axis of the impactor head, wherein (a) the round planar distal surface of a first impact flange of the pair of impact flanges has a diameter that is larger than the inner diameter of the annular rim of the first knee cone component of the pair of knee cone components, but smaller than the inner diameter of the annular rim of the second knee cone component of the pair of knee cone components, (b) the round planar distal surface of a second impact flange of the pair of impact flanges has a diameter that is larger than the inner diameters of the annular rims of both the first knee cone component and the second knee cone component of the pair of knee cone components, and (c) the round planar distal surface of the lead-in flange has a diameter that is smaller than the inner diameters of the annular rims of both the first knee cone component and the second knee cone component of the pair of knee cone components.
An orthopaedic knee system, comprising:
- a first conically-shaped concentric knee cone component configured to be installed into a surgically-prepared cavity in an end of a bone of a patient's knee, the first concentric knee component having an annular rim with an inner diameter,
- a second conically-shaped concentric knee cone component configured to be installed into the surgically-prepared cavity in the end of the bone of the patient's knee, the second concentric knee component having an annular rim with an inner diameter, the inner diameter of the annular rim of the second concentric knee cone component being larger than the inner diameter of the annular rim of the first concentric knee cone component, and
- an impactor head configured to impact the first knee cone component and the second knee cone component during a surgical procedure, the impactor head comprising (i) a proximal surface configured to be secured to an impaction handle, and (ii) a terraced impact surface opposite the proximal surface, the terraced impact surface having an annular-shaped lead-in flange and a pair of annular-shaped impact flanges formed therein, each of the lead-in flange and the pair of impact flanges being concentric with one another and having a round planar distal surface that is orthogonal to a longitudinal axis of the impactor head, wherein (a) the round planar distal surface of a first impact flange of the pair of impact flanges has a diameter that is larger than the inner diameter of the annular rim of the first knee cone component, but smaller than the inner diameter of the annular rim of the second knee cone component, (b) the round planar distal surface of a second impact flange of the pair of impact flanges has a diameter that is larger than the inner diameters of the annular rims of both the first knee cone component and the second knee cone component, and (c) the round planar distal surface of the lead-in flange has a diameter that is smaller than the inner diameters of the annular rims of both the first knee cone component and the second knee cone component.
A method of surgically preparing a knee of a patient, the method comprising:
- forming a surgically-prepared cavity in an end of a bone of the knee of the patient,
- selecting a knee cone augment from a pair of knee cone augments that includes a first knee cone augment and a second knee cone augment, the first knee cone augment having an annular rim that is smaller than an annular rim of the second knee cone augment,
- positioning the selected knee cone augment in the cavity formed in the end of the bone,
- advancing a distal end of an impactor head into a bore of the selected knee cone augment such that (i) a smaller impact flange of a pair of annular-shaped concentric impact flanges formed in the impactor head is positioned in contact with the annular rim of the selected knee cone augment if the selected knee cone augment is the first knee cone component, or (ii) the smaller impact flange of the pair of annular-shaped concentric impact flanges of the impactor head is positioned in the bore of the selected knee cone component and a larger impact flange of the pair of annular-shaped concentric impact flanges of the impactor head is positioned in contact with the annular rim of the selected knee cone augment if the selected knee cone augment is the second knee cone component, and
- impacting the impactor head such that impaction forces are transferred from one of the pair of annular-shaped concentric impact flanges of the impactor head to the selected knee cone augment.
2 more elements
Dependencies are inferred from the claim text.