System for custom implant design and instrumentation
View Patent ↗Systems and methods include a component of a bone implant that includes a patient specific bone contacting surface and, optionally, at least one protrusion adjacent to or extending from the patient specific bone contacting surface. The at least one protrusion is configured for engaging a bone preparation in the bone. To prepare the bone for receiving the component, one or more cutting tool templates may be used. The one or more cutting tool templates may be fabricated to have a patient specific bone contacting surface that engages the bone that is to receive the implant component. A cutting tool is engaged in one or more of one or more slots defined by the cutting tool template(s) to remove surface portions of the bone to create the bone preparation for engaging the protrusion. The patient specific bone contacting surface of the component engages the bone.
1 . A kit for use in implanting a glenoid baseplate of a shoulder implant in a bone of a patient, the kit comprising:
a locating pin guide having an inner throughhole, an outer throughhole, and a first patient specific bone contacting surface configured to contact the bone for ensuring a custom fit of the locating pin guide and a first predetermined surface region on the bone, wherein the outer throughhole is dimensioned to receive a locating pin;
at least one cutting tool template that defines a locating pin hole dimensioned to receive the locating pin and one or more cutting guide slots dimensioned to receive a cutting tool, and the at least one cutting tool template includes a second patient specific bone contacting surface, wherein the second patient specific bone contacting surface is configured to contact the bone for ensuring a custom fit of the cutting tool template and a second predetermined region on the bone;
a glenoid baseplate having a first surface and a third patient specific bone contacting surface configured to contact the bone for ensuring a custom fit of the component and a third predetermined surface region on the bone; and
an insertion instrument having a second locating pin hole dimensioned to receive the locating pin, and a component contacting surface, wherein the component contacting surface is configured to contact the glenoid baseplate for ensuring a custom fit of the component contacting surface and the first surface of the component,
wherein the kit further comprises a second cutting tool template having a third locating pin hole dimensioned to receive the locating pin, a cutting guide aperture dimensioned to receive the cutting tool, and a fourth patient specific bone contacting surface, wherein the fourth patient specific bone contacting surface is configured to contact the bone for ensuring a custom fit of the second cutting tool template and a fourth predetermined region on the bone.
2 . The kit of claim 1 wherein:
the locating pin guide is dimensioned such that an inner surface of the outer throughhole is spaced apart from the first predetermined surface region on the bone when the first patient specific bone contacting surface matingly engages the first predetermined surface region on the bone.
3 . The kit of claim 1 wherein:
the bone is a bone of a joint.
4 . The kit of claim 1 wherein:
the bone is a scapula.
5 . The kit of claim 1 wherein:
the bone is a scapula, and
a longitudinal axis of the inner throughhole is directed into an inner region of a glenoid cavity of the scapula when the first patient specific bone contacting surface matingly engages the first predetermined surface region on the scapula.
6 . The kit of claim 1 wherein:
the first patient specific bone contacting surface has a complementary shape to a bone surface of a three-dimensional model of the bone of the patient reconstructed from image scans of the bone of the patient.
7 . The kit of claim 1 wherein:
the second patient specific bone contacting surface has a complementary shape to a bone surface of a three-dimensional model of the bone of the patient reconstructed from image scans of the bone of the patient.
8 . The kit of claim 1 wherein:
the third patient specific bone contacting surface has a complementary shape to a bone surface of a three-dimensional model of the bone of the patient reconstructed from image scans of the bone of the patient.
9 . The kit of claim 1 , wherein the glenoid baseplate comprises at least one protrusion, the protrusion having a length corresponding to a depth of a bone preparation in the bone.