Femoral sizer

Patent metadata

Field	Value
Publication number	US-10405994-B2
Application number	US-201615267476-A
Country	US
Kind code	B2
Filing date	Sep 16, 2016
Priority date	Sep 18, 2015
Publication date	Sep 10, 2019
Grant date	Sep 10, 2019

Abstract

A surgical referencing guide includes a body having a contact surface and a first foot extending away from the body. The first foot includes a first reference surface having a first area defined by a standard deviation of a first dataset extracted from a database and being comprised of a plurality of first data points each corresponding to an individual bone within a population of bones and each corresponding to a location of a preselected point on the bone within a predetermined coordinate system.

First claim

The invention claimed is:

1. A method of manufacture of a surgical reference guide, comprising the steps of:
forming a body having a contact surface;
extracting a dataset from a database, the dataset comprised of a plurality of data points each corresponding to an individual bone within a population of bones and each corresponding to a location of a preselected point on the bone within a predetermined coordinate system; and
forming a foot having a first reference surface having an area defined by a standard deviation of the dataset, and said foot connected to the body via a leg.

2. A method of manufacture of a reference foot of a surgical reference guide having a body and at least one leg extending from the body, comprising the steps of:
selecting a dataset from a database, the dataset comprised of a plurality of data points each corresponding to a location of a point on an individual bone within a population of bones and within a predetermined coordinate system;
determining a mean and standard deviation of the dataset; and
forming a reference surface of the reference foot such that the reference surface has an area based on a standard deviation of the dataset.

3. The method of claim 2 , wherein determining the standard deviation includes determining the third standard deviation of the dataset.

4. The method of claim 3 , wherein the area includes a centroid and an outer boundary, the outer boundary being spaced from the centroid a distance substantially equal to the third standard deviation of the first dataset.

5. The method of claim 4 , further comprising:
determining a line slope of the dataset; and
coupling the reference foot to the at least one leg such that the reference foot has an orientation with respect to a contact surface of the body based on the line slope.

6. A method of manufacture of a surgical reference guide, comprising the steps of:
determining a mean distance of a posterior condylar prominence from a distal condylar prominence from a population of femurs;
forming a body having a planar contact surface;
forming a leg extending from the body; and
forming a foot extending from the leg and being spaced from the reference surface based on the mean distance.

7. The method of claim 6 , wherein forming the foot includes forming a reference surface disposed on the foot having an area, the area having a centroid spaced from the reference surface a distance substantially equal to the mean distance.

8. The method of claim 7 , wherein the area is defined by a standard deviation from a mean location within a preselected coordinate system of the posterior condylar prominence within the population of femurs.

Assignees

• Howmedica Osteonics Corp

Inventors

• Logan Scott G
• Walsh Gearoid

Classifications

• A61B2090/061

  for measuring dimensions, e.g. length · CPC title

• A61B17/155

  Cutting femur · CPC title

• A61B90/06 Primary

  Measuring instruments not otherwise provided for · CPC title

• A61F2/4657 Primary

  Measuring instruments used for implanting artificial joints (for surgical instruments A61B90/06) · CPC title

• A61F2002/4658

  for measuring dimensions, e.g. length · CPC title