US 12,329,426 B2
Press fit stem
Damon J. Servidio, Towaco, NJ (US)
Assigned to Howmedica Osteonics Corp., Mahwah, NJ (US)
Filed by Howmedica Osteonics Corp., Mahwah, NJ (US)
Filed on May 12, 2023, as Appl. No. 18/196,474.
Application 18/196,474 is a continuation of application No. 16/749,253, filed on Jan. 22, 2020, granted, now 11,684,398.
Claims priority of provisional application 62/798,000, filed on Jan. 29, 2019.
Prior Publication US 2023/0277226 A1, Sep. 7, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 17/16 (2006.01); A61B 17/17 (2006.01); A61B 17/74 (2006.01); A61B 17/92 (2006.01); A61F 2/30 (2006.01); A61F 2/36 (2006.01); A61F 2/46 (2006.01); A61L 27/04 (2006.01); A61L 27/06 (2006.01); A61B 17/56 (2006.01)
CPC A61B 17/744 (2013.01) [A61L 27/045 (2013.01); A61L 27/06 (2013.01); A61B 17/1668 (2013.01); A61B 2017/564 (2013.01); A61B 17/921 (2013.01); A61F 2/3662 (2013.01); A61L 2430/02 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method of implanting a medical implant comprising the steps of:
reaming a tapered bore through an end surface of a long bone and into an intramedullary canal of the long bone to a first depth, the tapered bore having a first diameter at an entry point at the surface of the bone;
reaming a counter bore through the end surface to form a proximally-facing surface at a bottom of the counter bore inside the long bone at a second depth disposed between the end surface and the first depth, the counter bore having a third diameter that is greater than the first diameter; and
fully seating a tapered portion of a stem of a medical implant into the tapered bore so as to form a press-fit between the tapered portion of the stem and the long bone, the medical implant further comprising a collar disposed about at least a portion of the stem, the collar having a first end and a second end, the first end having a second diameter greater than the first diameter and less than the third diameter and having an end surface defining a first extent of the collar, and
wherein, once the tapered portion of the stem is fully seated within the tapered bore, a gap is formed within the counter bore between the end surface of the collar and the proximally-facing surface of the counter bore.