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Patient match instrument

a patient-matched instrument and matching technology, applied in the field of surgical instruments, can solve the problems of poor repeatability and reproducibility, poor patient-matched instrument fit, etc., to achieve the effect of improving repeatability and reproducibility, and accurate placemen

Inactive Publication Date: 2014-01-16
SMITH & NEPHEW INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a patient-matched instrument that improves repeatability and reproducibility over previous versions. It has patient-matched surfaces that fit into the patient's trochlear groove and measures correctly with the person's femoral condyles. The design is designed to ensure consistent and accurate placement.

Problems solved by technology

Even if only one or two points on anatomy-contacting surfaces of a patient-matched instrument are inaccurate, misaligned, or otherwise misrepresent the true unique anatomy of the patient, the patient-matched instrument may not fit well, sit proud, teeter, wobble, or may not fit at all.
In many cases, poor patient-matched instrument fit may be attributed to even a few minor errors in the segmentation process.

Method used

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Examples

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Embodiment Construction

[0025]The following description of the depicted embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

[0026]Embodiments of the present invention provide a patient matched instrument that is designed to provide improved repeatability and reproducibility over the prior art. FIG. 1 illustrates a patient matched instrument 200 placed on a femur 2. The patient matched instrument 200 is used to make a distal cut in knee arthroplasty. The patient matched instrument 200 includes a body 202. A first leg portion 206 and a second leg portion 208 extend from the body 202. The body includes a cutting slot 210 and one or more pin bosses 212 are located on each leg portion 206,208. In some embodiments, the patient matched instrument 200 also includes pin mounts 214. In use, the femur 2 is exposed via surgical incision. The patient matched cutting block 200 is placed on the femur 2 and located in a home position. Pins (not shown) are ...

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Abstract

A patient matched instrument for a patient's femur is disclosed. The instrument includes a body having a cutting slot and a patient matched surface that mates with the patient's trochlear groove, a first leg portion extending from the body, a second leg portion extending from the body; and each leg portion has a contacting pad for tangential contact with the patient's femoral medial and lateral condyles.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Application No. 61 / 671,758, filed 15 Jul. 2012, of U.S. Provisional Application No. 61 / 681,440, filed 9 Aug. 2012, and of U.S. Provisional Application No. 61 / 715,562, filed 18 Oct. 2012. The disclosure of each prior application is incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]The present invention relates generally to surgical instruments and methods for the treatment of bones or joints, in some instances surgical instruments that are matched to a particular patient's anatomy, are described herein. Also described are methods of designing and using such surgical instruments.[0003]Conventional patient-matched instruments are provided with large surfaces that are configured to conform to a patient's unique anatomy. Successful surgical outcomes depend on the ability of patient-matched instruments to provide a reproducible, “confident” 3D-fit between the patie...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/15
CPCA61B17/155A61B2017/568A61B2034/108A61B17/1764
Inventor MCKINNON, BRIAN W.KENNEDY, ERIC S.JACKSON, MICHAEL J.WINEBARGER, RANDY C.WILKINSON, ZACHARY C.
Owner SMITH & NEPHEW INC
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