Patient-specific acetabular guides and associated instruments

• US 10,507,029 B2
• Filed: 04/15/2016
• Issued: 12/17/2019
• Est. Priority Date: 02/27/2006
• Status: Active Grant

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Meridew, Jason D., Witt, Tyler D., Schoenefeld, Ryan John, Slone, William Jason, Lombardi, Adolph V., Nycz, Jeffrey H., Munsterman, Matthew D., Wolfe, Alexander P., Kabata, Tamon, Nairus, James, Clohisy, John C.
• Primary Examiner(s): Boles, Sameh R
• Application Number:
  US15/130,414
• Publication Number:
  US 20160228133A1
• Time in Patent Office: 1,341 Days
• CPC Class Codes: A61B 17/1617 with mobile or detachable parts
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1666 for the acetabulum
• CPC Class Codes: A61B 17/1735 for rasps or chisels
• CPC Class Codes: A61B 17/1746 for the acetabulum
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: A61B 2090/034 abutting on parts of the device itself
• CPC Class Codes: A61F 2/4609 of acetabular cups
• CPC Class Codes: A61F 2002/4687 Mechanical guides for implantation instruments
• CPC Class Codes: F04C 2270/041 Controlled or regulated

Abstract

A patient-specific acetabular guide can be used for preparing an acetabulum of a patient to receive an acetabular implant. The acetabular guide includes a patient-specific engagement surface designed to be complementary and mateable with a corresponding surface of the patient'"'"'s pelvic anatomy. The acetabular guide is designed during a pre-operative plan for the patient by a three-dimensional reconstruction of the anatomy of the patient using two-dimensional medical images. The patient-specific engagement surface has a first portion mateable with a portion of the acetabulum of the patient. The acetabular guide includes a guiding element that extends from the acetabular guide opposite to the first portion of engagement surface. The guiding element defines a bore designed to be oriented along an alignment axis for an acetabular implant when the acetabular guide is engaged to the acetabulum.

Claims

1. An acetabular guide comprising:

a patient-specific engagement surface designed to be complementary and mateable with a corresponding surface of the patient'"'"'s pelvic anatomy as determined during a pre-operative plan of the patient by a three-dimensional reconstruction of the anatomy of the patient using two-dimensional medical images, the patient-specific engagement surface having a first portion mateable with a portion of an acetabulum of the patient and the engagement surface includes a second portion mateable with a portion of a rim of the acetabulum of the patient;

a guiding element extending from the acetabular guide opposite to the first portion of engagement surface, the guiding element defining a bore designed to be oriented along an alignment axis for an acetabular implant when the acetabular guide is engaged to the acetabulum; and

first and second marker elements extending from a portion of the acetabular guide outside the acetabulum of the patient, the marker elements defining corresponding first and second bores for guiding first and second marker pins into a bone portion of the patient.

2. An acetabular guide comprising:

a patient-specific engagement surface designed to be complementary and mateable with a corresponding surface of the patient'"'"'s pelvic anatomy as determined during a pre-operative plan of the patient by a three-dimensional reconstruction of the anatomy of the patient using two-dimensional medical images, the patient-specific engagement surface having a first portion mateable with a portion of an acetabulum of the patient;

a guiding element extending from the acetabular guide opposite to the first portion of engagement surface, the guiding element defining a bore designed to be oriented along an alignment axis for an acetabular implant when the acetabular guide is engaged to the acetabulum; and

first and second marker elements extending from a portion of the acetabular guide outside the acetabulum of the patient, the marker elements defining corresponding first and second bores for guiding first and second marker pins into a bone portion of the patient.