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Patient matched instrument

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

Inactive Publication Date: 2015-09-03
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 designs. The instrument 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

Experimental program
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Embodiment Construction

[0026]Referring to the accompanying drawings in which like reference numbers indicate like elements, FIG. 1 illustrates a patient matched instrument that is designed to provide improved repeatability and reproducibility over the prior art. FIG. 1 illustrates a patient matched (PM) instrument 100 placed on a tibia 2. The patient matched instrument 100 has a first paddle 110, a second paddle 112, a body 114, and a cutting slot 116. The paddles 110, 112 extend from the body 114 and are spaced apart from one another such that the paddles 110, 112 generally contact the medial 6 and lateral 8 tibial condyles. The body 114 may include one or more fixation holes 118. In the depicted embodiment, the body has three fixation holes but any number of holes may be used. The fixation holes 118 are dimensioned to receive pins (not shown) to temporarily fix the patient matched instrument 100 to the tibia 2. The cutting slot 116 is dimensioned to receive a cutting instrument, such as a reciprocating ...

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PUM

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Abstract

A patient matched instrument is disclosed. The patient matched instrument includes a body having an interior patient matched surface; a cutting slot extending through at least a portion of the body; a first paddle extending from the body; and a second paddle spaced apart from the first paddle and extending from the body; and wherein at least one of the first paddle and the second paddle further comprises a hook.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a PCT International Application of U.S. Patent Application No. 61 / 681,455 filed on Aug. 9, 2012, and U.S. Patent Application No. 61 / 715,565, filed on Oct. 18, 2012. The disclosure of each application is incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]Embodiments of the present invention generally relate 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.[0004]2. Related Art[0005]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 pati...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61B17/15
CPCA61B17/157A61B2017/568A61B17/15A61B17/1764
Inventor KENNEDY, ERIC S.TARSHA, MAROUN T.WILKINSON, ZACHARY C.WINEBARGER, RANDY C.
Owner SMITH & NEPHEW INC