Guides and instruments for improving accuracy of glenoid implant placement
AssigneeHowmedica Osteonics Corp.
InventorsNicolas R. Neichel, Benoit Le Negaret
Life of this patent
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Abstract
A method is disclosed for making a glenoid guide that includes obtaining scapula surface profile information of a specific patient, providing a manufacturing plan for making the glenoid guide having at least one patient specific contact surface configured to contact a portion of the glenoid rim or glenoid surface and for making the guide having a rotation control feature forming member, and adapting the manufacturing plan to specify the location of the rotation control forming feature relative to a portion of the glenoid determined to benefit from augmentation based on the surface profile information.
Claims31
A method of making a glenoid guide, the method comprising:
- obtaining scapula surface profile information of a specific patient;
- providing a manufacturing plan for making the glenoid guide having at least one patient specific contact surface configured to contact a portion of the glenoid rim or glenoid surface and for making the guide having a rotation control feature forming member;
- and
- adapting the manufacturing plan to specify the location of the rotation control forming feature relative to a portion of the glenoid determined to benefit from augmentation based on the surface profile information.
A surgical instrument for implanting an augmented glenoid implant, comprising:
- an elongate body comprising a first end, a second end, and a glenoid implant component retention feature disposed on the first end;
- and
- a rotation guide comprising an instrument interface and a bone interface portion disposed on another end thereof, the rotation guide comprising a rigid body disposed between the instrument interface and the bone interface portion wherein the shape and/or length of the rigid body is configured for a specific patient to control the rotational position of the glenoid implant component,
- wherein the elongate body comprises an interface portion configured to releasably engage the rotation guide.
A method of reaming a glenoid, comprising:
- placing a patient specific glenoid guide having a patient specific bone contact surface on a surface of a scapula of a patient such that the patient specific bone contact surface is in contact with a corresponding bone surface;
- establishing by reference to the patient specific glenoid guide a central guide feature extending from a central surface of the glenoid;
- establishing by reference to the patient specific glenoid guide a peripheral guide feature extending from a surface of the scapula peripheral to the central surface of the glenoid;
- coupling a reaming guide to a reamer;
- after coupling the reaming guide to the reamer, advancing the reaming guide over or into a proximal portion of the peripheral guide feature;
- advancing the reamer to the glenoid surface by reference to the central guide feature and by reference to the peripheral guide feature;
- reaming the glenoid surface by continued reference to the central guide feature and by reference to the peripheral guide feature.
Dependencies are inferred from the claim text.