US 10,420,650 B2Granted

Interposition implants for the hand

AssigneeTornier SAS

InventorsMichel Hassler, Philippe Bellemere

Life of this patent

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Abstract

An implant couples a first bone of a hand to a second bone of the hand. The implant includes a body that defines a median plane. The body also defines a first joint surface having a first central region that articulates with the first bone. The body further defines a second joint surface having a second central region that articulates with the second bone, and the second central region is disposed on an opposite side of the median plane of the body relative to the first central region. The first and second central regions correspond to profiles of first and second axial segments, respectively, the first and second axial segments are each one of a cylinder, a cone and a torus and are centered on first and second axes, respectively, and the first and second axes, as projected on the median plane, are substantially perpendicular to each other.

Claims17

Dependent claims

A method for coupling a first bone of a hand of a patient to a second bone of the hand of the patient, the method comprising:

providing an implant comprising a body defining:
a median plane;
a first joint surface having a first central region adapted to articulate with the first bone;
a second joint surface having a second central region adapted to articulate with the second bone, the second central region being disposed on an opposite side of the median plane of the body relative to the first central region, wherein the first central region and the second central region correspond to profiles of a first axial segment and a second axial segment, respectively, the first and second axial segments being each one of a cylinder, a cone and 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, being substantially perpendicular to each other;
and
a peripheral surface connecting the first joint surface and the second joint surface, the peripheral surface defining a peripheral groove;
forming a cavity between the first bone and the second bone;
interposing the implant between the first bone and the second bone in the cavity such that the first joint surface of the implant comes into direct contact and articulates with the first bone and the second joint surface of the implant comes into direct contact and articulates with the second bone;
and
cinching the body of the implant with a tendon of the hand of the patient, the tendon being slidably received in the peripheral groove of the implant.

7 more elements

A method for coupling a first metacarpal of a hand of a patient to a scaphoid of the hand of the patient, the method comprising:

providing an implant comprising a body defining:
a median plane;
a metacarpal joint surface having a first central region adapted to articulate with the first metacarpal;
and
a scaphoid joint surface having a second central region adapted to articulate with the scaphoid, the second central region being disposed on an opposite side of the median plane of the body relative to the first central region, wherein the first central region and the second central region correspond to profiles of a first axial segment and a second axial segment, respectively, the first and second axial segments being each one of a cylinder, a cone and 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, being substantially perpendicular to each other;
forming a trapezium cavity between the first metacarpal and the scaphoid by performing a total trapeziectomy;
and
interposing the implant between the first metacarpal and the scaphoid in the trapezium cavity such that the metacarpal joint surface of the implant comes into direct contact and articulates by tilting about the first axis with the first metacarpal, with the first axis of the implant extending in one of frontal and anteroposterior planes of the patient, and the scaphoid joint surface of the implant comes into direct contact and articulates by tilting about the second axis with the scaphoid, with the second axis of the implant extending in the other of the frontal and anteroposterior planes.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/401,812Filed 9 Jan 2017 · continuation
Priority: FR 09 5419019 Jun 2009
Published: US 2017/0172753 A122 Jun 2017
Granted: 24 Sep 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification22 codes

A61F 2/4241
For wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes: for hands, e.g. fingers
A61F 2/30721
Joints: accessories
A61F 2/4261
For wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes: for wrists
A61F 2/30724
Accessories: spacers for centering an implant in a bone cavity, e.g. in a cement-receiving cavity

Family

Application12/819,390Parent of this continuation-in-part · filed 21 Jun 2010
Application61/674,089Us provisional application · filed 20 Jul 2012
Application61/706,584Us provisional application · filed 27 Sep 2012
Application13/943,647Parent of this continuation · filed 16 Jul 2013
US 9,408,706 B2Parent of this continuation-in-part · filed 9 Aug 2016
US 2017/0172753 A1Pre-grant publication · published 22 Jun 2017
US 9,572,673 B2Parent of this continuation
Application13/943,647Parent of this continuation-in-part
US 2010/0324694 A1Published application
US 2013/0304223 A1Published application
US 10,420,650 B2This patent

From the US filing history. Foreign family members aren’t listed.