US 12,440,345 B2
Interposition implants for the hand
Michel Hassler, Saint Ismier (FR); and Philippe Bellemere, Nantes (FR)
Assigned to TORNIER, Montbonnot-Saint-Martin (FR)
Filed by TORNIER, Montbonnot-Saint-Martin (FR)
Filed on Oct. 8, 2021, as Appl. No. 17/497,567.
Application 17/497,567 is a continuation of application No. 16/576,608, filed on Sep. 19, 2019, granted, now 11,141,284.
Application 16/576,608 is a continuation of application No. 15/401,812, filed on Jan. 9, 2017, granted, now 10,420,650, issued on Sep. 24, 2019.
Application 15/401,812 is a continuation of application No. 13/943,647, filed on Jul. 16, 2013, granted, now 9,572,673, issued on Feb. 21, 2017.
Application 13/943,647 is a continuation in part of application No. 12/819,390, filed on Jun. 21, 2010, granted, now 9,408,706, issued on Aug. 9, 2016.
Claims priority of provisional application 61/706,584, filed on Sep. 27, 2012.
Claims priority of provisional application 61/674,089, filed on Jul. 20, 2012.
Claims priority of application No. 0954190 (FR), filed on Jun. 19, 2009; and application No. 1256863 (FR), filed on Jul. 16, 2012.
Prior Publication US 2022/0023058 A1, Jan. 27, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61F 2/42 (2006.01); A61F 2/30 (2006.01); A61F 2/38 (2006.01)
CPC A61F 2/4241 (2013.01) [A61F 2/30721 (2013.01); A61F 2/4261 (2013.01); A61F 2002/30113 (2013.01); A61F 2002/30153 (2013.01); A61F 2002/302 (2013.01); A61F 2002/30205 (2013.01); A61F 2002/30224 (2013.01); A61F 2002/30301 (2013.01); A61F 2002/30616 (2013.01); A61F 2/30724 (2013.01); A61F 2002/30754 (2013.01); A61F 2/3872 (2013.01); A61F 2002/4258 (2013.01); A61F 2230/0019 (2013.01); A61F 2230/0065 (2013.01); A61F 2230/0067 (2013.01); A61F 2230/0069 (2013.01); A61F 2230/0095 (2013.01); A61F 2310/00173 (2013.01); A61F 2310/00574 (2013.01)] 26 Claims
OG exemplary drawing
 
1. An interposition implant to couple a first bone and a second bone of an anatomical joint of a hand of a subject, the implant comprising:
a body defining:
a median plane;
a first joint surface having a first central region to articulate with the first bone; and
a second joint surface having a second central region to articulate with the second bone, the second central region located on an opposite side of the body relative to the first central region; wherein
the first central region and the second central region having profiles of a first axial segment and a second axial segment, respectively, wherein the first and second axial segments each defining a torus and being centered on a first axis and a second axis, respectively,
the first and second axes, as projected on the median plane, are oriented substantially perpendicular to each other, and
the first joint surface further defines a first peripheral region adjacent the first central region and the first axial segment has a first cross section that has a smaller curvature in the first central region of the first joint surface than in the first peripheral region of the first joint surface such that the first central region is flatter than the first peripheral region.