Long bone resurfacing bone lock

Patent metadata

Field	Value
Publication number	US-2016270932-A1
Application number	US-201615166794-A
Country	US
Kind code	A1
Filing date	May 27, 2016
Priority date	Mar 15, 2013
Publication date	Sep 22, 2016
Grant date	—

Abstract

A locking implant is provided for a long bone. The locking implant comprises a head portion, a stem portion extending from the head portion, and an anchor disposed at an end of the stem portion for engagement within a resected long bone. The anchor defines at least one locking feature, such as a cam, configured to engage an interior of the resected long bone upon rotation of the implant, thereby locking the head portion to the long bone. The implant may comprise a two component modular design. Methods of locking the implant to along bone structure are also provided.

First claim

What is claimed is:

1 . A method of locking an implant to a long bone structure, the method comprising:
excising a defective end of the long bone; cutting a transverse slot in the long bone distally extending a distance from a resection line; inserting a stem and anchor portion of the implant through the slot from a side of the long bone; rotating the implant and locking the anchor to an interior of the long bone.

2 . The method of claim 1 , wherein the stem of the implant defines a length, and cutting the transverse slot comprises defining a slot have a length in a longitudinal direction of the long bone substantially equal to the length of the stem.

3 . The method of claim 1 , comprising rotating the implant a predetermined distance less than about 90 degrees with respect to the long bone.

4 . The method of claim 1 , wherein the anchor defines a cam surface and rotating the implant comprises grippingly engaging the cam surface to an intramedullary canal.

5 . The method of claim 1 , wherein the implant comprises a two component modular design including a base component removably coupled to a head component.

Assignees

• Biomet Mfg Llc

Inventors

• Mcdaniel John M
• Winslow Nathan A

Classifications

• A61F2220/0033

  made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit · CPC title

• A61F2/4637 Primary

  for connecting or disconnecting two parts of a prosthesis · CPC title

• A61F2002/30884

  Fins or wings, e.g. longitudinal wings for preventing rotation within the bone cavity · CPC title

• A61F2002/30579

  with mechanically expandable devices, e.g. fixation devices · CPC title

• A61F2002/30387

  Dovetail connection · CPC title