WO2019052622A1 - A patient-specific electronic template for usage in corrective osteotomies for treating bone and joint deformities - Google Patents

A patient-specific electronic template for usage in corrective osteotomies for treating bone and joint deformities Download PDF

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Publication number
WO2019052622A1
WO2019052622A1 PCT/EG2018/000013 EG2018000013W WO2019052622A1 WO 2019052622 A1 WO2019052622 A1 WO 2019052622A1 EG 2018000013 W EG2018000013 W EG 2018000013W WO 2019052622 A1 WO2019052622 A1 WO 2019052622A1
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Prior art keywords
template
bone
leg bone
leg
osteotomy
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PCT/EG2018/000013
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French (fr)
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WO2019052622A4 (en
Inventor
Mahmoud Alm EL Din HAFEZ
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Hafez Mahmoud Alm El Din
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Publication of WO2019052622A1 publication Critical patent/WO2019052622A1/en
Publication of WO2019052622A4 publication Critical patent/WO2019052622A4/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/14—Surgical saws ; Accessories therefor
    • A61B17/15—Guides therefor
    • A61B17/151—Guides therefor for corrective osteotomy
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/14—Surgical saws ; Accessories therefor
    • A61B17/15—Guides therefor
    • A61B17/151—Guides therefor for corrective osteotomy
    • A61B17/152—Guides therefor for corrective osteotomy for removing a wedge-shaped piece of bone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
    • A61B17/8095—Wedge osteotomy devices

Definitions

  • the present invention is related to a patient-specific electronic template for usage in corrective osteotomies for the leg, whether the upper or axial part of the leg bone.
  • the template preoperatively determines the exact direction of the bone cuts to be made, the degree of deformity, and the amount of bones to be cut in a correct way by means of software-assisted preoperative planning.
  • Corrective osteotomy as a surgical operation for the upper or axial part of the leg bone, is a serious procedure that requires a high degree of expertise and considerable surgical skills.
  • the surgeon has to determine the location, angle and degree of the cut to be made to the leg bone, whether in upper or axial osteotomies.
  • the incision made in conventional surgical operations is significantly long, thus requiring extensive recovery and prolonged rehabilitation at home.
  • Total dependence on the 2D X-ray for planning for the surgery limits the possibilities of total success, such as the correct alignment and placement of the metal strip on the bone, the inclination degrees, and the amounts of bones to be cut. It does not also provide the surgeon with the ability to predetermine the size and shape of the metal strip and the dimensions and position of the wedge used for separating between the two parts of the leg bone after undergoing osteotomy.
  • corrective osteotomies for the leg represent an alternative for total knee replacement, they still need to be performed by surgeons with great expertise and skills to be able to determine the exact location and angle of inclination of the cut, and the dimensions of the wedge or bone graft to be placed subsequent to osteotomy.
  • the present invention is related to a patient-specific electronic template for usage in corrective osteotomies for the leg, whether the upper or axial part of the leg bone.
  • the template according to the present invention, is an ideal solution for surgeons that may help achieve the required exactness and correctness for positioning the metal strip on the bone and also for determining the location, level and angle of the cut to be made in the bone, and the dimensions of the wedge used for correcting the bone deformity.
  • the present invention is related to a patient-specific electronic template for usage in corrective osteotomies for the leg, whether the upper or axial part of the leg bone.
  • the template preoperatively determines the exact direction of the bone cut to be made, the degree of deformity, and the amount of bones to be cut in a correct way by means of software-assisted preoperative planning. (See figures 1, 3, 8, and 10)
  • the template, according to the present invention is a single-use device.
  • the design and placement of this patient-specific template is based on the preoperative CT scan made to the patient before undergoing corrective osteotomy for the leg, whether the upper or axial part of the leg bone.
  • a CT scan of one patient cannot be similar to that of any other individual.
  • the surgeon may perform the surgical cut for the leg bone through the paths arranged in the template, which are designed to match the same inclination degree of the required cut and the level and location of the cut.
  • the template also provides the surgeon with the ability to determine the size of the metal strip and wedge used after performing osteotomy. (See figures 1, 3, 6, and 7)
  • the said template is designed according to software-assisted preoperative planning.
  • the 2D CT scan is first inputted into the computer program then converted into a 3D model for the bone.
  • the said 3D model shows all the details and anatomic features of the surface of the thigh bone, such as the anterior tibial projection of the leg bone, and the upper surface and conical shape thereof. (See figures 1, 2, 3, 4, and 5)
  • the hypothetical preoperative planning is made by using a computer program for determining the level and inclination degree of the bone cut, the dimensions of the wedge to be used, and the amounts of the bone graft required. (See figure 6)
  • the features of the template inner surface are produced.
  • the said features match those of the outer surface of the leg bone in the same location where the template shall be fixed to perform osteotomy, whether upper osteotomy on the top of the leg bone or axial osteotomy on the surface of the leg bone.
  • the features of the inner surface represent one of the advantages of the template, according to the present invention, since they enable the surgeon to place the template on the leg bone in the only one correct location. These features do not match the surface of the leg bone except in the just one location already predetermined on the computer program; wherein the said location matches the location of the cut to be made. (See figures 2 and 9)
  • Software-assisted preoperative planning for corrective osteotomy is based on the mechanical and anatomic axes of the bone as well as its degree of inclination and deformity. It also depends on the dimensions of the bone as inputted into the computer program by means of the images of the CT scans.
  • the surgeon may select the appropriate size of the metal strip and wedge and design their placement location, their alignment, and their inclination angle on the bone.
  • the surgeon may also determine the location, level, and inclination angle of the cut to be made in order to correct the bone deformity.
  • the computer program begins producing an electronic form for the template according to the size, location and alignment already determined by the surgeon.
  • the features of the inner surface of the template match those of the outer surface of the leg bone in the location where the template is to be fixed to perform osteotomy, whether upper osteotomy on the top of the leg bone or axial osteotomy on the surface of the leg bone. (See figures 3, 4, 5, and 10)
  • This electronic form or file of the template is sent to a 3D printer to produce a real model that may be used in surgical operations.
  • the model may be printed using different techniques, selected by the surgeon, according to the desired quality and final price.
  • the said electronic template may be easily sterilized. It is also easy to carry because of its light weight and small size, unlike prior art large and heavy tools.
  • the surface of the electronic template contains printed data about the size of the metal strip and wedge, the direction of the template that suits the right or left leg, and the name of the patient to prevent any confusion or loss between templates. (See figure 5)
  • the electronic template comprises fixation openings or fixation holes through which fixation pins and fixation screws pass to attach the template on the bone surface.
  • the said openings have different locations and inclination angles on the bone surface as well as diverse diameters according to the type of the template, whether it is used for corrective osteotomy for the upper or axial part of the leg bone.
  • upper openings are arranged on the template for fixation thereof on the top of the bone surface
  • other fixation openings are arranged with a certain inclination angle on the surface of the anterior leg bone
  • orthogonal openings are arranged on the surface of the anterior leg bone.
  • fixation openings completely restrict the movement of the template to ensure its best fit on the leg bone in the exact location already plotted on the computer program to achieve correct and safe cut for the leg bone.
  • fixation openings are arranged with a certain inclination angle on the surface of the anterior leg bone and orthogonal openings are arranged for fixation on the surface of the anterior leg bone for the same above-mentioned reasons.
  • Such openings enable the surgeon to perform osteotomy easily without fear of the possibility of the template being displaced from its predetermined location as mapped out on the computer program used in the preoperative planning. (See figures 1 and 8)
  • the surgical operation of osteotomy is made by means of paths comprised in the template and designed for enabling the surgeon to make the proper bone cut while ensuring that the cut angle matches that already mapped out on the computer program.
  • the template comprises two paths; a main path used for corrective osteotomy for the upper or axial part of the leg to perform the main cut in the leg bone and a secondary path for performing additional cuts, if necessary.
  • the two paths i.e. the main one and the secondary one
  • comprised in the electronic template for corrective osteotomy extend to the opposite direction of the surgeon to ensure that the saw does not deviate from its inclination angle and that the template correctly fits into the leg bone. This helps achieve accuracy and correctness of the location of the cut to be made. (See figures 1, 6, and 8)
  • Figure (1) Shows a two-dimensional elevation for the template used in corrective osteotomy for the upper part of the leg bone. As shown in the figure, an upper opening (4) is arranged for template fixation on the bone and two inclined openings are arranged for fixation on the bone surface (3). The figure also shows the main path (1) used by the surgeon to perform osteotomy and also the two orthogonal openings arranged for fixing the template on the bone surface (2).
  • Figure (2) Shows a three-dimensional perspective view for the template used in corrective osteotomy for the upper part of the leg bone. The surface features are shown on the inner surface (5) and these features exactly match the leg bone surface in the location where the template is to be fixed.
  • Figure (3) Shows a two-dimensional elevation for the template (7) used in corrective osteotomy for the upper part of the leg bone.
  • the template is fixed in its right location on the leg bone (8).
  • the figure also shows the contact surface (6) between the template and the bone.
  • Figure (4) is a two-dimensional horizontal elevation for the template used in corrective osteotomy for the upper part of the leg bone.
  • the template is fixed in its right location on the leg bone.
  • Figure (5) Shows a two-dimensional side elevation for the template used in corrective osteotomy for the upper part of the leg bone.
  • the template is fixed in its right location on the leg bone.
  • Figure (6) is a two-dimensional elevation for the template used in corrective osteotomy for the upper part of the leg bone.
  • the template is fixed in its right location on the leg bone.
  • the figure also shows the cut paths (9) to be made on the leg bone.
  • Figure (7) Shows a two-dimensional elevation for the metal strip (10) with the wedge comprised therein. The metal strip and the wedge are fixed in their right locations on the leg bone subsequent to osteotomy.
  • Figure (8) Shows a two-dimensional elevation for the template used in corrective osteotomy for the axial part of the leg bone. The figure shows an upper opening (13) for fixation of the template on the bone and two lower openings for fixation on the bone surface (14). The figure also shows the main cut path (11) used by the surgeon to perform osteotomy and also the secondary cut path (12) used for making additional cuts, if necessary, and for determining the thickness of the wedge to be fixed.
  • Figure (9) Shows a three-dimensional perspective view for the template used in corrective osteotomy for the axial part of the leg bone.
  • the surface features are shown on the inner surface (15) and these features exactly match the leg bone surface in the location where the template is to be fixed.
  • Figure (10) Shows a three-dimensional perspective view for the template used in corrective osteotomy for the axial part of the leg bone.
  • the template is fixed in its right location on the leg bone.
  • the figure also shows the contact surfaces (16) between the template and the bone.

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Abstract

This invention relates to patient specific templates for osteotomy is to predetermine the exact direction and degree of deformity before surgery and to estimate postoperative limb alignment which must mimic the physiologic loading to secure favorable clinical outcome. The Correction osteotomy using conventional techniques may lead to under and over correction. We designed a patient specific templating technique for high tibial osteotomy and also for corrective osteotomy of shaft deformities. The technique was applied for unilateral and bilateral high tibial osteotomy and tibial shaft deformity. The patient specific templates are based on CT-scan images which transferred to a specific software to construct a 3D model of bone. A virtual planning of the surgery is done to design the templates which are used to perform the surgery. The 3D printing machine is used to produce the patient specific template.

Description

A patient-specific electronic template for usage in corrective osteotomies for treating bone and joint deformities
This application claims the benefit of Egyptian Provisional application No. 24/2017 filed on September 14, 2017 and Egyptian Patent Application No. 447/2018 on March 13, 2018
Technical Field;
The present invention is related to a patient-specific electronic template for usage in corrective osteotomies for the leg, whether the upper or axial part of the leg bone. The template, according to the present invention, preoperatively determines the exact direction of the bone cuts to be made, the degree of deformity, and the amount of bones to be cut in a correct way by means of software-assisted preoperative planning.
Problem or Deficiencies in Prior Art:
Corrective osteotomy, as a surgical operation for the upper or axial part of the leg bone, is a serious procedure that requires a high degree of expertise and considerable surgical skills. The surgeon has to determine the location, angle and degree of the cut to be made to the leg bone, whether in upper or axial osteotomies. In addition, the incision made in conventional surgical operations is significantly long, thus requiring extensive recovery and prolonged rehabilitation at home.
Total dependence on the 2D X-ray for planning for the surgery limits the possibilities of total success, such as the correct alignment and placement of the metal strip on the bone, the inclination degrees, and the amounts of bones to be cut. It does not also provide the surgeon with the ability to predetermine the size and shape of the metal strip and the dimensions and position of the wedge used for separating between the two parts of the leg bone after undergoing osteotomy.
Although corrective osteotomies for the leg, whether the upper or axial part of the leg bone, represent an alternative for total knee replacement, they still need to be performed by surgeons with great expertise and skills to be able to determine the exact location and angle of inclination of the cut, and the dimensions of the wedge or bone graft to be placed subsequent to osteotomy.
Disclosure of the Invention;
The present invention is related to a patient-specific electronic template for usage in corrective osteotomies for the leg, whether the upper or axial part of the leg bone. The template, according to the present invention, is an ideal solution for surgeons that may help achieve the required exactness and correctness for positioning the metal strip on the bone and also for determining the location, level and angle of the cut to be made in the bone, and the dimensions of the wedge used for correcting the bone deformity.
Detailed Description of the Invention;
The present invention is related to a patient-specific electronic template for usage in corrective osteotomies for the leg, whether the upper or axial part of the leg bone. The template, according to the present invention, preoperatively determines the exact direction of the bone cut to be made, the degree of deformity, and the amount of bones to be cut in a correct way by means of software-assisted preoperative planning. (See figures 1, 3, 8, and 10) The template, according to the present invention, is a single-use device. The design and placement of this patient-specific template is based on the preoperative CT scan made to the patient before undergoing corrective osteotomy for the leg, whether the upper or axial part of the leg bone. A CT scan of one patient cannot be similar to that of any other individual.
By means of the said template, the surgeon may perform the surgical cut for the leg bone through the paths arranged in the template, which are designed to match the same inclination degree of the required cut and the level and location of the cut. The template also provides the surgeon with the ability to determine the size of the metal strip and wedge used after performing osteotomy. (See figures 1, 3, 6, and 7)
The said template is designed according to software-assisted preoperative planning. The 2D CT scan is first inputted into the computer program then converted into a 3D model for the bone. The said 3D model shows all the details and anatomic features of the surface of the thigh bone, such as the anterior tibial projection of the leg bone, and the upper surface and conical shape thereof. (See figures 1, 2, 3, 4, and 5)
The hypothetical preoperative planning is made by using a computer program for determining the level and inclination degree of the bone cut, the dimensions of the wedge to be used, and the amounts of the bone graft required. (See figure 6)
Accordingly, the features of the template inner surface are produced. The said features match those of the outer surface of the leg bone in the same location where the template shall be fixed to perform osteotomy, whether upper osteotomy on the top of the leg bone or axial osteotomy on the surface of the leg bone. The features of the inner surface represent one of the advantages of the template, according to the present invention, since they enable the surgeon to place the template on the leg bone in the only one correct location. These features do not match the surface of the leg bone except in the just one location already predetermined on the computer program; wherein the said location matches the location of the cut to be made. (See figures 2 and 9)
Software-assisted preoperative planning for corrective osteotomy, whether for the upper or axial part of the leg bone, is based on the mechanical and anatomic axes of the bone as well as its degree of inclination and deformity. It also depends on the dimensions of the bone as inputted into the computer program by means of the images of the CT scans. The surgeon may select the appropriate size of the metal strip and wedge and design their placement location, their alignment, and their inclination angle on the bone. The surgeon may also determine the location, level, and inclination angle of the cut to be made in order to correct the bone deformity.
At this point, the computer program begins producing an electronic form for the template according to the size, location and alignment already determined by the surgeon. The features of the inner surface of the template match those of the outer surface of the leg bone in the location where the template is to be fixed to perform osteotomy, whether upper osteotomy on the top of the leg bone or axial osteotomy on the surface of the leg bone. (See figures 3, 4, 5, and 10)
This electronic form or file of the template is sent to a 3D printer to produce a real model that may be used in surgical operations. The model may be printed using different techniques, selected by the surgeon, according to the desired quality and final price.
The said electronic template may be easily sterilized. It is also easy to carry because of its light weight and small size, unlike prior art large and heavy tools.
The surface of the electronic template, whether the one used for corrective osteotomy for the upper part of the leg bone or for corrective osteotomy for the axial part of the leg bone, contains printed data about the size of the metal strip and wedge, the direction of the template that suits the right or left leg, and the name of the patient to prevent any confusion or loss between templates. (See figure 5)
The electronic template comprises fixation openings or fixation holes through which fixation pins and fixation screws pass to attach the template on the bone surface. The said openings have different locations and inclination angles on the bone surface as well as diverse diameters according to the type of the template, whether it is used for corrective osteotomy for the upper or axial part of the leg bone. In cases of templates used for corrective osteotomy for the upper part of the leg bone, upper openings are arranged on the template for fixation thereof on the top of the bone surface, other fixation openings are arranged with a certain inclination angle on the surface of the anterior leg bone, and orthogonal openings are arranged on the surface of the anterior leg bone. Such fixation openings completely restrict the movement of the template to ensure its best fit on the leg bone in the exact location already plotted on the computer program to achieve correct and safe cut for the leg bone. In cases of templates used in corrective osteotomy for the axial part of the leg bone, fixation openings are arranged with a certain inclination angle on the surface of the anterior leg bone and orthogonal openings are arranged for fixation on the surface of the anterior leg bone for the same above-mentioned reasons. Such openings enable the surgeon to perform osteotomy easily without fear of the possibility of the template being displaced from its predetermined location as mapped out on the computer program used in the preoperative planning. (See figures 1 and 8)
The surgical operation of osteotomy is made by means of paths comprised in the template and designed for enabling the surgeon to make the proper bone cut while ensuring that the cut angle matches that already mapped out on the computer program. The template comprises two paths; a main path used for corrective osteotomy for the upper or axial part of the leg to perform the main cut in the leg bone and a secondary path for performing additional cuts, if necessary. The two paths (i.e. the main one and the secondary one), comprised in the electronic template for corrective osteotomy, extend to the opposite direction of the surgeon to ensure that the saw does not deviate from its inclination angle and that the template correctly fits into the leg bone. This helps achieve accuracy and correctness of the location of the cut to be made. (See figures 1, 6, and 8)
Description of the Figures:
Figure (1): Shows a two-dimensional elevation for the template used in corrective osteotomy for the upper part of the leg bone. As shown in the figure, an upper opening (4) is arranged for template fixation on the bone and two inclined openings are arranged for fixation on the bone surface (3). The figure also shows the main path (1) used by the surgeon to perform osteotomy and also the two orthogonal openings arranged for fixing the template on the bone surface (2). Figure (2): Shows a three-dimensional perspective view for the template used in corrective osteotomy for the upper part of the leg bone. The surface features are shown on the inner surface (5) and these features exactly match the leg bone surface in the location where the template is to be fixed.
Figure (3): Shows a two-dimensional elevation for the template (7) used in corrective osteotomy for the upper part of the leg bone. The template is fixed in its right location on the leg bone (8). The figure also shows the contact surface (6) between the template and the bone.
Figure (4): is a two-dimensional horizontal elevation for the template used in corrective osteotomy for the upper part of the leg bone. The template is fixed in its right location on the leg bone.
Figure (5): Shows a two-dimensional side elevation for the template used in corrective osteotomy for the upper part of the leg bone. The template is fixed in its right location on the leg bone.
Figure (6): is a two-dimensional elevation for the template used in corrective osteotomy for the upper part of the leg bone. The template is fixed in its right location on the leg bone. The figure also shows the cut paths (9) to be made on the leg bone.
Figure (7): Shows a two-dimensional elevation for the metal strip (10) with the wedge comprised therein. The metal strip and the wedge are fixed in their right locations on the leg bone subsequent to osteotomy. Figure (8): Shows a two-dimensional elevation for the template used in corrective osteotomy for the axial part of the leg bone. The figure shows an upper opening (13) for fixation of the template on the bone and two lower openings for fixation on the bone surface (14). The figure also shows the main cut path (11) used by the surgeon to perform osteotomy and also the secondary cut path (12) used for making additional cuts, if necessary, and for determining the thickness of the wedge to be fixed.
Figure (9): Shows a three-dimensional perspective view for the template used in corrective osteotomy for the axial part of the leg bone. The surface features are shown on the inner surface (15) and these features exactly match the leg bone surface in the location where the template is to be fixed.
Figure (10): Shows a three-dimensional perspective view for the template used in corrective osteotomy for the axial part of the leg bone. The template is fixed in its right location on the leg bone. The figure also shows the contact surfaces (16) between the template and the bone.

Claims

Claims
1. A patient-specific electronic template used for corrective osteotomy for the upper or axial part of the leg bone, wherein the said template preoperatively determines the exact direction of the bone cut to be made, the degree of deformity, and the amount of bones to be cut by means of software-assisted preoperative planning. The said template comprises cut paths and openings for fixation thereof on the bone. The said template comprises a surface exactly matching the surface of the bone to be fixed on. The said template also comprises data about the dimensions of the metal strip to be inserted into the patient's bone and the size of the screws used for fixation thereof.
2. The template, according to claim (1), is characterized by the advantage of comprising cut paths with definite dimensions for cutting the bones to be removed.
3. The template, according to claim (1), is characterized by the advantage of comprising openings for fixing the template on the leg bone.
4. The template, according to claim (1), is characterized by having an inner surface that totally matches the location where it is to be fixed on the leg bone surface, thus enabling the surgeon for the best fit of the template in its right location on the leg bone.
5. The template, according to claim (1), is characterized by having an inner surface that totally matches the surface of the leg bone in the location where it is to be fixed. The fixation location on the leg bone is determined according to the anatomic features on the surface of the thigh bone, such as the anterior tibial projection of the leg bone, and the upper surface thereof in cases of corrective osteotomy for the upper part of the leg or the conical shape of the leg bone in cases of corrective osteotomy for the axial part of the leg.
6. The template, according to claim (1), is characterized by having upper openings for fixation thereof on the top of the bone surface, openings with a certain inclination angle for fixation on the surface of the anterior leg bone, and orthogonal openings for fixation on the surface of the anterior leg bone, wherein the said fixation openings completely restrict the movement of the template to ensure its best fit on the leg bone in the exact location already plotted on the computer program to achieve correct and safe cut for the leg bone.
7. The template, according to claim (1), is characterized by having main and secondary cut paths when used in corrective osteotomy for the upper and axial parts of the leg bone.
8. Template paths, according to claim (7), wherein the main path comprised in the electronic template used for corrective osteotomy for the upper or axial part of the leg bone is used for performing the main cut in the leg bone, whereas the secondary path is used for performing additional cuts, if necessary.
9. Template paths, according to claim (7), wherein the secondary path comprised in the electronic template used for corrective osteotomy for the upper or axial part of the leg bone is used for determining the width of the wedge to be fixed subsequent to osteotomy.
10. Template paths, according to claim (7), wherein the main and secondary paths, comprised in the electronic template for corrective osteotomy for the upper or axial part of the leg bone, extend to the opposite direction of the surgeon to ensure that the saw does not deviate from its inclination angle and that the template correctly fits into the leg bone. This helps achieve accuracy and correctness of the location of the cut to be made.
11. The electronic template, according to claim (1), wherein the process of determining the location and positioning thereof on the leg bone depends on software-assisted preoperative planning. The said preoperative planning enables the determination of the type of the metal strip used in the surgery, the location and positioning thereof, the exact location of the cut to be made, the inclination angle of the bone after osteotomy, the thickness of the wedge used for separating between the two parts of the leg bone after being cut and its positioning angle, thus enabling the surgeon to correct the deformity in the leg bone.
12. The preoperative planning, according to claim (11), wherein it depends on the CT scans made to the patient before undergoing corrective osteotomy for the upper or axial part of the leg bone. The said CT scan is converted into a 3D model for the leg bone, which features all the details related to the morphology, anatomy and anatomic indications of the bone.
PCT/EG2018/000013 2017-09-14 2018-09-12 A patient-specific electronic template for usage in corrective osteotomies for treating bone and joint deformities WO2019052622A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11931106B2 (en) 2019-09-13 2024-03-19 Treace Medical Concepts, Inc. Patient-specific surgical methods and instrumentation
US11986251B2 (en) 2019-09-13 2024-05-21 Treace Medical Concepts, Inc. Patient-specific osteotomy instrumentation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007127994A2 (en) * 2006-04-28 2007-11-08 Acumed Llc Osteotomy systems
US20110213376A1 (en) * 2010-02-26 2011-09-01 Biomet Sports Medicine, Llc Patient-Specific Osteotomy Devices and Methods
US20160242791A1 (en) * 2015-02-19 2016-08-25 First Ray, LLC Indexed tri-planar osteotomy guide and method
WO2017070318A1 (en) * 2015-10-22 2017-04-27 Materialise N.V. Two-part surgical guide
WO2017085479A1 (en) * 2015-11-16 2017-05-26 Oxford University Innovation Ltd. Proximal tibial osteotomy system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007127994A2 (en) * 2006-04-28 2007-11-08 Acumed Llc Osteotomy systems
US20110213376A1 (en) * 2010-02-26 2011-09-01 Biomet Sports Medicine, Llc Patient-Specific Osteotomy Devices and Methods
US20160242791A1 (en) * 2015-02-19 2016-08-25 First Ray, LLC Indexed tri-planar osteotomy guide and method
WO2017070318A1 (en) * 2015-10-22 2017-04-27 Materialise N.V. Two-part surgical guide
WO2017085479A1 (en) * 2015-11-16 2017-05-26 Oxford University Innovation Ltd. Proximal tibial osteotomy system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11931106B2 (en) 2019-09-13 2024-03-19 Treace Medical Concepts, Inc. Patient-specific surgical methods and instrumentation
US11986251B2 (en) 2019-09-13 2024-05-21 Treace Medical Concepts, Inc. Patient-specific osteotomy instrumentation

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