Patella Resection Instrument Guide Having Optional Patient-Specific Features
AssigneeConforMIS, Inc.
InventorsMark D. Landes, Terrance Wong, Paula Marie Berg, William Kurtz, Philipp Lang
Life of this patent
Estimating the term…
Abstract
Disclosed are improved and/or patient-adapted (e.g., patient-specific and/or patient-engineered) patellar clamp systems, surgical methods and related surgical tools. The various clamp assemblies can facilitate one-handed operation by a user and can include modular features that provide for ease of interchangeability to accommodate components having patient specific features that conform or substantially conform to the patient's patellar anatomy.
Claims21
A surgical instrument for grasping a patellar bone of a patient during joint surgery, comprising:
- a first grasping element having a first bone contacting surface, the first bone contacting surface having an outer surface that is shaped to substantially conform to an anatomical surface of a portion of the patellar bone;
- a second grasping element having a second bone contacting surface;
- and
- at least one of the first or second grasping elements including a guide for aligning a surgical tool to cut, drill or ream at least a portion of the patellar bone;
- wherein at least one of the first and second grasping elements can be moved to grasp the patellar bone between the first and second grasping elements, such that the first bone contacting surface contacts the substantially conforming anatomical surface of the patellar bone and the second bone contacting surface contacts a generally opposing surface of the patellar bone.
A surgical instrument for grasping a patellar bone of a patient during joint surgery, comprising:
- a first grasping element having a first bone contacting surface;
- a second grasping element having a second bone contacting surface and a third bone contacting surface, at least a portion of the third bone contacting surface being selectively removable from the second grasping element;
- and
- the third bone contacting surface having a surface that is shaped to substantially conform to an anatomical surface of a portion of the patellar bone;
- wherein at least one of the first and second grasping elements can be moved to grasp the patellar bone between the first and second grasping elements, such that the third bone contacting surface contacts the substantially conforming anatomical surface of the patellar bone.
A method of preparing a bone surface of a patella during knee surgery, the method comprising:
- determining a three-dimensional shape of a portion of the patella and producing a grasper having a first and second grasping element, at least one of the first and second grasping elements including a first bone contacting surface that conforms to the portion of the patella;
- aligning the first bone contacting surface with the conforming portion of the patella;
- grasping the patella with the first and second grasping elements such that the first bone contacting surface is aligned with the conforming portion of the patella;
- and
- preparing the bone surface by cutting, drilling or reaming at least a portion of the bone surface while the patella is grasped between the first and second grasping elements.
Dependencies are inferred from the claim text.