Customized patient-specific orthopaedic pin guides
View Patent ↗Customized patient-specific orthopaedic surgical instruments are disclosed. Methods for fabricating and using such instruments are also disclosed.
1. A customized patient-specific orthopaedic surgical instrument, comprising:
a customized patient-specific tibial pin guide comprising (i) a body having a bone-facing surface that has a customized patient-specific negative contour configured to receive a portion of an anterior side of a patient's tibia that has a corresponding positive contour, the body having (a) a first hole formed therein with a first locking slot extending in a direction parallel to the axis of the first hole, the first locking slot opening into the first hole, and (b) a second hole formed therein with a second locking slot extending in a direction parallel to the axis of the second hole, the second locking slot opening into the second hole, (ii) a first tab extending posteriorly from the body, the first tab having a bone-facing surface that has a customized patient-specific negative contour configured to receive a first portion of the proximal side of the patient's tibia that has a corresponding positive contour, and (iii) a second tab extending posteriorly from the body, the second tab having a bone-facing surface that has a customized patient-specific negative contour configured to receive a second portion of the proximal side of the patient's tibia that has a corresponding positive contour,
a first removable drill bushing having a post with a locking flange extending therefrom, the post of the first removable drill bushing being positioned in the first hole of the body of the customized patient-specific tibial pin guide such that the locking flange of the first removable drill bushing is positioned in the first locking slot of the body of the customized patient-specific tibial pin guide, and
a second removable drill bushing having a post with a locking flange extending therefrom, the post of the second removable drill bushing being positioned in the first second hole of the body of the customized patient-specific tibial pin guide such that the locking flange of the second removable drill bushing is positioned in the second locking slot of the body of the customized patient-specific tibial pin guide.
2. The customized patient-specific orthopaedic surgical instrument of claim 1 , wherein:
the first locking slot of the body of the customized patient-specific tibial pin guide comprises a first female thread extending helically around the periphery of the first hole of the body of the customized patient-specific tibial pin guide,
the first locking flange of the first removable drill bushing comprises a first male thread extending helically around the post of the first removable drill bushing, the first male thread of the first drill bushing being threaded into the first female thread of the body so as to lock the post of the first removable drill bushing into the first hole of the body of the customized patient-specific tibial pin guide,
the second locking slot of the body of the customized patient-specific tibial pin guide comprises a second female thread extending helically around the periphery of the second hole of the body of the customized patient-specific tibial pin guide, and
the second locking flange of the second removable drill bushing comprises a second male thread extending helically around the post of the second removable drill bushing, the second male thread of the first drill bushing being threaded into the second female thread of the body so as to lock the post of the second removable drill bushing into the second hole of the body of the customized patient-specific tibial pin guide.
3. The customized patient-specific orthopaedic surgical instrument of claim 1 , wherein:
the customized patient-specific orthopaedic tibial pin guide is formed from a polymeric material, and
both the first removable drill bushing and the second removable drill bushing are formed from a metallic material.
4. The customized patient-specific orthopaedic surgical instrument of claim 3 , wherein the body, the first tab, and the second tab of the customized patient-specific tibial pin guide define a monolithic structure.
5. The customized patient-specific orthopaedic surgical instrument of claim 1 , wherein:
the body, the first tab, and the second tab of the customized patient-specific tibial pin guide define a monolithic, disposable polymeric structure, and
both the first removable drill bushing and the second removable drill bushing are reusable and formed from a metallic material.
6. The customized patient-specific orthopaedic surgical instrument of claim 1 , wherein the first removable drill bushing and the second removable drill bushing are positioned to allow a surgeon to install a pair of guide pins on the anterior side of the patient's tibia.