Plate selection user interface and design tool with database
Described herein are systems and methods in which a surgeon can use computer-implemented deformity assessment and correction tools to create 3D models of a bone. To ensure adequate healing, a surgeon may choose to use a prefabricated bone plate, a semi-customized bone plate, or a fully-customized bone plate to hold first and second bone portions in a corrected position. To select the appropriate prefabricated bone plate, the surgeon may identify three landmark locations on the first and second bone portions corresponding to desired fixation hole locations on the bone plate. The surgeon can then use a software application to evaluate multiple bone plate designs in a library and compare the average proximity of the landmark locations to fixation hole locations on each of the bone plate designs. Then, the surgeon can determine which bone plate design best fits the patient anatomy based on his comparison.
1 . A method for correcting a deformity in a patient's foot, the method comprising:
obtaining a deformed bone model of a cuneiform of the patient's foot and
a metatarsal of the patient's foot;
virtually repositioning the deformed bone model to simulate reorientation of the metatarsal relative to the cuneiform to correct the deformity to create a virtually repositioned bone model; and
using at least the virtually repositioned bone model to generate a cutting guide model defining:
a first bone engagement surface shaped to match a first contour on the cuneiform;
a second bone engagement surface shaped to match a second contour of the metatarsal; and
a first guide feature that, with the first bone engagement surface overlying the first contour, is positioned to guide resection of at least one of the cuneiform and the metatarsal as part of a correction osteotomy for correcting the deformity.
2 . The method of claim 1 , further comprising:
a second guide feature that, with the second bone engagement surface overlying the second contour, is positioned to guide resection of at least one of the cuneiform and the metatarsal.
3 . The method of claim 2 , wherein the cutting guide model further comprises:
a first end having the first bone engagement surface;
a second end having the second bone engagement surface;
a first bone attachment feature positioned to secure the first end to the cuneiform; and
a second bone attachment feature positioned to secure the second end to the metatarsal.
4 . The method of claim 3 , further comprising:
using the cutting guide model to fabricate a cutting guide having the first bone engagement surface, the second bone engagement surface, the first bone attachment feature, the second bone attachment feature, the first guide feature, and the second guide feature.
5 . The method of claim 4 , further comprising:
placing the cutting guide such that the first bone engagement surface overlies the first contour and the second bone engagement surface overlies the second contour;
securing the first bone attachment feature to the cuneiform;
securing the second bone attachment feature to the metatarsal;
with the first guide feature, guiding motion of a cutting tool to resect the cuneiform; and
with the second guide feature, guiding motion of a cutting tool to resect the metatarsal.
6 . The method of claim 5 , further comprising:
reorienting the metatarsal relative to the cuneiform; and
after reorienting the metatarsal relative to the cuneiform, promoting fusion between the cuneiform and the metatarsal.
7 . The method of claim 1 , wherein obtaining the deformed bone model comprises obtaining CT scan data of the cuneiform and the metatarsal.
8 . The method of claim 1 , further comprising using at least the deformed bone model to generate an implant model defining a first bone-facing surface comprising a first shape that matches a first profile of a first resected surface resected with a cutting guide fabricated using the cutting guide model.
9 . The method of claim 8 , wherein the implant model further comprises a second bone-facing surface comprising a second shape that matches a second profile of a second resected surface of the cuneiform or the metatarsal after resection with the cutting guide.
10 . The method of claim 9 , further comprising:
using the cutting guide model to fabricate a cutting guide having the first bone engagement surface and first guide feature;
using the implant model to fabricate an implant having the first bone-facing surface and the second bone-facing surface;
placing the cutting guide such that the first bone engagement surface overlies the first contour;
with at least the first guide feature, guiding motion of a cutter to resect at least one of the cuneiform or the metatarsal to define the first resected surface and the second resected surface; and
placing the implant between the first resected surface and the second resected surface such that the first shape is aligned with the first profile and the second shape is aligned with the second profile.
11 . A method for correcting a deformity in a patient's foot, the method comprising:
obtaining a deformed bone model of first and second bones of the foot;
generating a corrected bone model of the foot by simulating moving a first bone portion relative to a second bone portion; and
using the corrected bone model to generate a cutting guide model defining:
a first bone engagement surface shaped to match a first contour of the first bone;
a second bone engagement surface shaped to match a second contour of the second bone; and
a first guide feature that, with the first and second bone engagement surfaces overlying the first and second bones respectively, is positioned to guide resection of the first bone as part of a correction osteotomy for correcting the deformity.
12 . The method of claim 11 , further comprising:
a second guide feature that, with the first and second bone engagement surfaces overlying the first and second bones, is positioned to guide resection of the first bone.
13 . The method of claim 12 , wherein the cutting guide model further comprises:
a first end having the first bone engagement surface;
a second end having the second bone engagement surface;
a first bone attachment feature positioned to secure the first end to a cuneiform of the foot; and
a second bone attachment feature positioned to secure the second end to a metatarsal of the foot.
14 . The method of claim 13 , further comprising:
using the cutting guide model to fabricate a cutting guide having the first bone engagement surface, the second bone engagement surface, the first bone attachment feature, the second bone attachment feature, the first guide feature, and the second guide feature.
15 . The method of claim 14 , further comprising:
placing the cutting guide such that the first bone engagement surface overlies the first contour and the second bone engagement surface overlies the second contour;
securing the first bone attachment feature to the cuneiform;
securing the second bone attachment feature to the metatarsal;
with the first guide feature, guiding motion of a cutting tool to resect the cuneiform; and
with the second guide feature, guiding motion of a cutting tool to resect the metatarsal.
16 . The method of claim 15 , further comprising:
reorienting the metatarsal relative to the cuneiform; and
after reorienting the metatarsal relative to the cuneiform, promoting fusion between the cuneiform and the metatarsal.
17 . The method of claim 11 , wherein the obtaining step the first bone model comprises obtaining CT scan data of the first and second bones.
18 . The method of claim 11 , further comprising using at least the corrected bone model to generate an implant model.
19 . The method of claim 18 , wherein the implant model includes an implant engagement surface that matches a surface of the corrected bone model.
20 . The method of claim 19 , further comprising:
using the cutting guide model to fabricate a cutting guide having the first bone engagement surface and first guide feature;
using the implant model to fabricate an implant having the implant engagement surface.