Guides and instruments for improving accuracy of glenoid implant placement
AssigneeHowmedica Osteonics Corp.
InventorsNicolas Neichel, Benoit Le Negaret
Life of this patent
Estimating the term…
Abstract
A patient specific shoulder guide is provided that includes a hub and a plurality of peripheral members. Each of the peripheral members has a peripheral member height dimension between the patient specific contact surface and a side of the peripheral member opposite the patient specific contact surface. At least one of the peripheral members is a low profile peripheral member in which the peripheral height dimension is less than the peripheral height dimension of at least one other of the peripheral members or is less than the hub height.
Claims18
A reaming guide for guiding a reamer for reaming a bone, the reaming guide comprising:
- a rigid body including a peripheral member and a reamer interface, the reamer interface configured for mounting to a reamer;
- and
- a removable peg including:
- a body extending from a proximal shoulder to a distal shoulder,
- a proximal portion extending proximally from the proximal shoulder of the body, and
- a distal projection extending distally from the distal shoulder of the body,
- wherein the peripheral member defines a recess sized and configured to receive the proximal portion of the removable peg,
- wherein the distal projection of the removable peg is sized and configured to be received in a peripheral guide feature formed in a bone;
- wherein, when the removable peg is coupled to the peripheral member, the distal shoulder of the removable peg is configured to contact a first reamed glenoid surface such that the removable peg and the peripheral member function as a depth stop for indicating when the reamer has reamed a second reamed glenoid surface to a planned depth, the second reamed glenoid surface being angled to the first reamed surface.
A reaming guide, comprising:
- a body extending from a first end to a second end;
- a reamer interface disposed at the first end of the body, the reamer interface defining a first aperture and a second aperture, the first aperture sized and configured to be engaged by a lateral peg of a reamer that extends in a first direction, and the second aperture sized and configured to be engaged by an axial member of the reamer that extends in a second direction that is different from the first direction;
- and
- a peripheral member disposed at the second end of the body, the peripheral member including a distal portion configured to contact a first reamed glenoid surface and function as a depth stop for the reamer to indicate when the reamer has formed a second glenoid surface to a planned depth, the second reamed glenoid surface disposed at an angle with respect to the first reamed glenoid surface.
A reaming assembly, comprising:
- a reamer, the reamer including:
- a body defining a longitudinal axis,
- a guide interface extending radially outwardly from a body of the reamer, the guide interface including a lateral peg and an axial member, and
- an actuator configured to be moved along the longitudinal axis defined by the body from a first position and a second position;
- and
- a reaming guide, including:
- a body extending from a first end to a second end;
- a reamer interface disposed at the first end of the body, the reamer interface defining a first aperture and a second aperture, the first aperture sized and configured to be engaged by the lateral peg of the reamer, and the second aperture sized and configured to be engaged by the axial member of the reamer;
- and
- a peripheral member disposed at the second end of the body, the peripheral member including a distal portion configured to contact a first reamed glenoid surface and to function as a depth stop for the reamer to indicate when the reamer has formed a second glenoid surface to a planned depth, the second reamed glenoid surface disposed at an angle with respect to the reamed glenoid surface.
Dependencies are inferred from the claim text.