ORTHOPEDIC BONE FIXATION SYSTEMS AND METHODS

• US 20150051650A1
• Filed: 10/20/2014
• Published: 02/19/2015
• Est. Priority Date: 04/18/2012
• Status: Abandoned Application

• Current Assignee: Materialise NV
• Original Assignee: Materialise NV
• Inventors: VANCRAEN, Wilfried, VERSTREKEN, Frederik, LENAERTS, Bram
• Application Number:
  US14/518,647
• Publication Number:
  US 20150051650A1
• Time in Patent Office: Days
• US Class Current: 606/281
• CPC Class Codes: A61B 17/151 for corrective osteotomy
• CPC Class Codes: A61B 17/80 Cortical plates , i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
• CPC Class Codes: A61B 17/809 with bone-penetrating elements, e.g. blades or prongs bone staples A61B17/0642; intramedullary nails with a plate at an end A61B17/7233
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/565 for surgical correction of axial deviation, e.g. hallux valgus or genu valgus
• CPC Class Codes: A61B 2034/102 Modelling of surgical devices, implants or prosthesis
• CPC Class Codes: A61B 2034/108 Computer aided selection or customisation of medical implants or cutting guides
• CPC Class Codes: G16H 50/50 for simulation or modelling of medical disorders
• CPC Class Codes: G16Z 99/00 Subject matter not provided for in other main groups of this subclass

Abstract

The orthopedic systems are patient-specific and provided with two types of features for positioning and/or fixing the plate to the bone or bone fragments. A method for generating bone plates comprises: generating a model of the bone defect or envisaged osteotomy based on one or more images of the bone and the surgical plan; designing based on said model a model corresponding to the envisioned repair of said bone defect/envisaged result of the osteotomy; generating a bone plate based on the information above, comprising: one or more patient-specific features corresponding to the surface of a bone fragment in the area close to the defect; and one or more fixation features whose position and/or orientation is such that the fixation elements will enter the bone in areas suitable for fixing the bone plate to each bone fragment.

Claims

1. A bone plate for use in orthopedic surgery, comprising:

a support structure;

one or more patient-specific features configured to be positioned on a bone;

one or more fixation features configured to fix the bone plate onto the bone; and

one or more positioning elements configured to position the bone plate onto the bone.

2. The bone plate according to claim 1, wherein the positioning elements are selected from the group consisting of a non-threaded pin, a non-threaded peg or a non-threaded hook.

3. The bone plate according to claim 1, wherein the bone plate comprises a first patient-specific feature of the one or more patient-specific features corresponding to a feature of a first bone fragment of the bone and a second patient-specific feature of the one or more patient-specific features corresponding to a second bone fragment of the bone.

4. The bone plate according to claim 1, wherein the supporting structure has a varying thickness, including an area of increased thickness around an osteotomy or fracture plane.

5. The bone plate according to claim 1, wherein the bone plate comprises at least two positioning elements of the one or more positioning elements that extend from a surface of the support structure.

6. The bone plate according to claim 1, wherein at least one of the one or more positioning elements is detachable.

7. The bone plate according to claim 1, wherein a size of the bone plate and a position of the one or more positioning elements are determined according to a pre-operative plan.

8. The bone plate according to claim 1, wherein the support structure comprises a first part and a second part, each part comprising fixation features, and wherein the first part and the second part are configured to be combined and attached to each other in order to form a one-piece bone plate after placement on the bone.

9. A method for generating a patient-specific bone plate, the method comprising:

generating a bone model of a bone based on one or more images of the bone, wherein the bone model includes one of a bone defect or a planned osteotomy;

designing, based on the bone model, a bone plate model; and

generating a bone plate, comprising;

a support structure;

one or more patient-specific features configured to be positioned on a bone;

one or more fixation features configured to fix the bone plate onto the bone; and

one or more positioning elements configured to position the bone plate onto the bone.

10. The method according to claim 9, wherein at least one of the one or more positioning elements extends from a surface of the support structure.

11. A method for fixating a bone plate to one or more bone fragments of a bone, the method comprising:

drilling holes into one or more of the bone fragments of the bone, wherein the holes are configured to receive one or more positioning elements of the bone plate;

repositioning the one or more bone fragments into a correct position for healing;

positioning the bone plate on the one or more bone fragments using the positioning elements, wherein the bone plate comprises;

a support structure;

one or more patient-specific features configured to be positioned on the one or more bone fragments;

one or more fixation features configured to fix the bone plate onto the one or more bone fragments; and

one or more positioning elements configured to position the bone plate onto the one or more bone fragments;

fixing the bone plate to the one or more bone fragments using the one or more fixation features on the bone plate.

12. The method according to claim 11, wherein repositioning the bone fragments into the correct position for healing comprises:

fixing the bone plate onto a first bone fragment of the one or more bone fragments;

using the bone plate as a hinge to further position the bone plate onto a second bone fragment of the one or more bone fragments.