Accessory for implanting a hip endoprosthesis, and method for manipulating the same
AssigneeSmith & Nephew Orthopaedics AG
InventorsReinhard Graf, Martin Imhof, Rene Brack
Life of this patent
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Abstract
The application relates to a method of orienting a bone-milling cutter and an impact instrument for a hip-prosthesis cup in an acetabulum. The method includes initially positioning a manipulation cup by a manipulation joint head and representing this position by at least one guide rod or fixation rod that is fixed in a bone. The method also includes removing the manipulation cup and adjusting a position of both the bone-milling cutter and the impact instrument with respect to either the guide rod itself or a guide rod that is attached to a holding device disposed on at least one fixation rod.
Claims20
A method of orienting a bone-milling cutter and an impact instrument for a hip-prosthesis cup in an acetabulum, comprising:
- initially positioning a manipulation cup relative to the acetabulum by means of a manipulation joint head,
- representing the positioning of the manipulation cup by at least one guide rod or fixation rod that is fixed in a bone,
- removing the manipulation cup, and
- adjusting a position of both the bone-milling cutter and the impact instrument with respect to either the guide rod itself or a guide rod that is attached to a holding device disposed on at least one fixation rod.
A method of orienting a bone-milling cutter and an impact instrument for a hip-prosthesis cup in an acetabulum, comprising:
- positioning a manipulation cup in an acetabulum at a desired orientation;
- fixing a guide rod in a bone, with a guide device attached to the manipulation cup;
- removing the manipulation cup;
- engaging a template to the guide rod;
- and
- aligning the bone-milling cutter with the template such that an orientation of the bone-milling cutter matches the desired orientation of the manipulation cup;
- and
- aligning the impact instrument with the template such that an orientation of the impact instrument matches the desired orientation of the manipulation cup.
A method of orienting a bone-milling cutter and an impact instrument for a hip-prosthesis cup in an acetabulum, comprising:
- positioning a manipulation cup in an acetabulum at a desired orientation, wherein the manipulation cup has a guide device attached thereto;
- fixing at least one guide rod in a bone and engaging the guide rod to the guide device;
- removing the manipulation cup;
- engaging a template to the guide rod;
- aligning the bone-milling cutter with the template such that an orientation of the bone-milling cutter matches the desired orientation of the manipulation cup;
- milling a bearing socket in the acetabulum;
- removing the bone-milling cutter;
- and
- aligning the impact instrument with the template such that an orientation of the impact instrument matches the desired orientation of the manipulation cup.
Dependencies are inferred from the claim text.