KR102250250B1 - Method and device for modelling and producing implant for orbital wall of human body customication with patterns for implanting a screw - Google Patents

Abstract

The present invention comprises the steps of: (a) receiving information on an orbital defect; (b) As a shape corresponding to the edge of the defect site, the curved shape of the orbital implant provided with the edge following the curved surface of the bone at the defect site is estimated, and the orbital implant area is determined for the estimated curved shape of the orbital implant. Receiving an input; (c) receiving a type or type of a pattern for the estimated curved shape of the orbital implant corresponding to the orbital implant area; (d) giving guide lines to the estimated curved shape of the orbital implant corresponding to the orbital implant region; And (e) when any one of the guide lines is selected, a guide line in the depth direction is displayed with respect to the selected guide line, and when a deformation of the guide line in the depth direction is requested, the depth direction is displayed according to the request. It provides a method and apparatus for modeling and manufacturing an orbital implant including; generating shape information of the orbital implant by transforming the guide line in the depth direction.

Description

METHOD AND DEVICE FOR MODELLING AND PRODUCING IMPLANT FOR ORBITAL WALL OF HUMAN BODY CUSTOMICATION WITH PATTERNS FOR IMPLANTING A SCREW}

The present invention relates to an orbital implant manufacturing technology, and more particularly, based on information on the periphery of the defective area of the patient, it is possible to estimate the shape of the orbital implant capable of supporting the defective area while accurately matching with the defective area. The present invention relates to an implant design having a pattern formed of holes, and a method and apparatus for modeling and manufacturing an orbital implant that can be easily designed.

In the case of patients in which the bone forming the orbit was damaged due to a rupture or defect, etc., the soft tissues supporting the eyeball flowed down through the hole created by the injury, which could cause eye depression or change in the position of the eyeball. In addition, secondary damage or infection was caused by tissues or muscles around the eyes coming into contact with the damaged area.

Accordingly, conventionally, an orbital implant is applied to the damaged portion of the bone that forms the orbit, and the bone that forms the orbit is reconstructed to protect the patient from secondary damage or infection.

Conventional orbital implant manufacturing methods can be largely divided into two.

First, the orbital implant manufacturing method is that a doctor cuts and bends an orbital implant template that is pre-processed and sold to fit a patient to create an implant shape suitable for the patient, and the orbital implant template is formed of a thin titanium plate, and FIG. 1 shows the orbital implant This is an example of a template.

In addition, the second orbital implant manufacturing method is to manually design a 3D curved surface to fit the affected area using a 3D CAD design tool and model the implant shape to manufacture it.

The first method described above has a problem in that the accuracy of matching the implant to the affected area differs according to the doctor's skill level because the doctor manufactures the patient's affected area indirectly through images such as X-ray, CT, and MRI. In addition, it was highly likely to undergo trial and error, such as requiring recalibration in the actual procedure. And even if the doctor's skill level was high, it was very difficult to bend the orbital implant template to exactly match the affected area.

In the second method, since there is no dedicated software for designing and modeling orbital implants, a curved surface is manually designed and manufactured using commonly used 3D CAD software, or a 3D model of the orbit opposite the patient's affected area is converted. A mirroring technique was used that transforms the data to be symmetrical like a mirror and uses it for implant manufacturing. When modeling an orbital implant using the 3D CAD software, it is necessary to design a 3D curved surface, so the design process is very difficult and takes a long time. Even when the mirroring technique is applied, the structure of the left and right orbits of the human body In practice, since it is not perfectly symmetrical, additional work to eliminate the gap is indispensable, so whether or not the mirroring technique is used, it takes a long time to manufacture and has a difficult manufacturing problem.

In addition, for medical image data such as CT and MRI, precision problems due to the limitation of the current resolution and the actual condition of the affected area identified during surgery may often occur in a situation different from that of the operation planning stage.

In this way, it is often necessary to process, transform and apply in the field, and it takes at least two days to design and print a metal 3D printing implant, so it is a situation that requires correction due to variables that occur during surgery. It is difficult to immediately correct and respond according to the production.

Therefore, it is required to develop a patient-specific 3D printing implant technology that can easily model an implant that can support the defective area while accurately matching with the affected area from the periphery information of the patient's defective area, while responding to the modification/production immediately upon request for modification or change. Has become.

Korean Patent Registration No. 1013555980000 Korean Patent Registration No. 1016711500000 Korean Patent Registration No. 1010272520000 Korean Patent Registration No. 1012692950000

The present invention estimates the shape of an orbital implant capable of supporting the defective area while accurately matching with the defective area based on information on the periphery of the defective area of the patient, and modeling the orbital implant that enables fast, accurate and easy modeling and manufacturing of the orbital implant. Its purpose is to provide a method and apparatus for manufacturing.

In addition, another object of the present invention is a method for modeling and manufacturing an orbital implant that can easily design and design an implant by forming a pattern capable of screw placement even if there is a change in the position of the screw hole according to the modification or change in the orbital implant. It is to provide the device.

To this end, according to one aspect of the present invention, (a) receiving information on the orbital defect region; (b) As a shape corresponding to the edge of the defect site, the curved shape of the orbital implant provided with the edge following the curved surface of the bone at the defect site is estimated, and the orbital implant area is determined for the estimated curved shape of the orbital implant. Receiving an input; (c) receiving a type or type of a pattern for the estimated curved shape of the orbital implant corresponding to the orbital implant area; (d) giving guide lines to the estimated curved shape of the orbital implant corresponding to the orbital implant region; And (e) when any one of the guide lines is selected, a guide line in the depth direction is displayed with respect to the selected guide line, and when a deformation of the guide line in the depth direction is requested, the depth direction is displayed according to the request. It provides a method for modeling and manufacturing an orbital implant including; generating shape information of the orbital implant by transforming the guide line in the depth direction.

In addition, the information on the orbital defect is 3D image information on the affected area selected by the user, and lines at a predetermined interval are assigned to the 3D image information in a horizontal or vertical direction, and a depth is applied to each of the lines. It is characterized in that the curve of the bone at the edge of the defect site is calculated based on the amount of change in direction, and the curved surface indicated by the calculated curves for each of the lines is estimated to be estimated as the curved shape of the orbital implant.

In addition, the information on the orbital defect is 3D image information on the affected area selected by the user, and lines at predetermined intervals in the horizontal direction are assigned to the 3D image information, and each of the lines is in the depth direction. Based on the amount of change, the curve of the bone at the edge of the defect is calculated, and the curved surface of the orbital implant is estimated by estimating the curved surface indicated by the calculated curves for each of the lines, and the 3D image information is in advance in the vertical direction. Orbital implants are given by giving lines of predetermined intervals, calculating the curve of the bone at the edge of the defect based on the amount of change in the depth direction for each of the lines, and estimating the curved surface indicated by the calculated curves for each of the lines. The curved shape of the orbital implant is estimated, and the average of the curved shape of the orbital implant is calculated to estimate the shape of the final orbital implant.

In addition, (f) when a curved surface to be used is selected, controlling a curved surface to be used or a curved surface not used by setting on/off of each pixel of the depth image in the curved shape of the orbital implant.

In addition, the pattern in step (c) is characterized in that the screw hole shape.

According to another aspect of the present invention, there is provided an apparatus for modeling and manufacturing an orbital implant, comprising: a user interface unit in charge of an interface with a user; And receiving information on the orbital defect, estimating the curved shape of the orbital implant having an edge that follows the curved surface of the bone of the defect, as a shape corresponding to the edge of the defect, and the estimated orbital implant When the type or type of the orbital implant area and pattern is input for the curved shape, guide lines are given to the estimated curved shape of the orbital implant corresponding to the orbital implant area, and any one of the guide lines is selected, A guide line in the depth direction is displayed for the selected guide line, and when a deformation of the guide line in the depth direction is requested, the guide line in the depth direction is transformed in the depth direction according to the request to generate shape information of the orbital implant. It may include a control device;

In addition, the information on the orbital defect is 3D image information on the affected area selected by the user, and lines at a predetermined interval are assigned to the 3D image information in a horizontal or vertical direction, and a depth is applied to each of the lines. It is characterized in that the curve of the bone at the edge of the defect site is calculated based on the amount of change in direction, and the curved surface indicated by the calculated curves for each of the lines is estimated to be estimated as the curved shape of the orbital implant.

In addition, the information on the orbital defect is 3D image information on the affected area selected by the user, and lines at predetermined intervals in the horizontal direction are assigned to the 3D image information, and each of the lines is in the depth direction. Based on the amount of change, the curve of the bone at the edge of the defect is calculated, and the curved surface of the orbital implant is estimated by estimating the curved surface indicated by the calculated curves for each of the lines, and the 3D image information is in advance in the vertical direction. Orbital implants are given by giving lines of predetermined intervals, calculating the curve of the bone at the edge of the defect based on the amount of change in the depth direction for each of the lines, and estimating the curved surface indicated by the calculated curves for each of the lines. The curved shape of the orbital implant is estimated, and the average of the curved shape of the orbital implant is calculated to estimate the shape of the final orbital implant.

In addition, when receiving a request for selection of a curved surface to be used from the user interface unit, the control device controls a curved surface to be used or a curved surface not used by setting on/off of each pixel of the depth image in the curved shape of the orbital implant. It is done.

In addition, the pattern is characterized in that the screw hole shape.

The present invention estimates the shape of an orbital implant capable of supporting the defective area while accurately matching with the defective area based on information on the periphery of the defective area of the patient, thereby making it possible to quickly, accurately and easily model and manufacture the orbital implant.

In addition, since a pattern can be applied to a three-dimensional curved surface with only a simple 2D image operation, implant design time can be shortened and design difficulty can be significantly reduced.

In addition, due to the processing of the orbital implant, it is impossible to use the existing screw hole, or even if a modification or change is applied to the orbital implant, such as cutting a certain area of the implant, such as cutting, or a change in the position of the screw hole, the screw is placed. There is an advantage of being able to respond immediately at the surgical site by enabling screw placement through a pattern formed with these possible holes.

1 is a diagram illustrating a general orbital implant template.
2 is a block diagram of an apparatus for modeling and manufacturing an orbital implant according to a preferred embodiment of the present invention.
3 is a flowchart of a method for modeling and manufacturing an orbital implant according to a preferred embodiment of the present invention.
4 to 15 are views illustrating an orbital implant modeling and manufacturing process according to a preferred embodiment of the present invention.

Hereinafter, an apparatus and a method for modeling and manufacturing an orbital implant according to the present invention will be described in detail with reference to the drawings.

<Configuration of device for orbital implant modeling and fabrication>

2 shows the configuration of an apparatus for manufacturing an orbital implant according to a preferred embodiment of the present invention.

The device for manufacturing the orbital implant includes a control device 100, a memory unit 102, an input/output interface 104, a user interface 106, a display controller 108, a display 110, and an external device. It consists of a device interface 112 and a 3D printer 114.

The control device 100 performs an operation for modeling and manufacturing an orbital implant according to a preferred embodiment of the present invention by entirely controlling each part of the device for manufacturing the orbital implant.

The memory unit 102 stores various information including a processing program of the control device 100.

The input/output interface 104 serves as an interface between the control device 100 and the user interface 106.

The user interface 106 provides various types of information input from a user performing orbital implant modeling and manufacturing to the control device 100.

The display controller 108 receives video output information from the control device 100 and outputs it to the display 110.

The display 110 outputs video according to the video output information from the control device 100 through the display controller 108.

The external device interface 112 interfaces between the 3D printer 114 as an external device and the control device 100.

The 3D printer 114 manufactures an orbital implant by 3D printing under the control of the control device 100.

<Procedure of method for orbital implant modeling and fabrication>

3 is a flowchart illustrating a method for modeling and manufacturing an orbital implant applicable to an apparatus for manufacturing an orbital implant according to a preferred embodiment of the present invention. A method for modeling and manufacturing an orbital implant according to a preferred embodiment of the present invention will be described in detail with reference to FIG. 3.

The control device 100 checks whether the user requests orbital implant design through the user interface 106 (step 200).

When the user requests the design of an orbital implant, the control device 100 receives image information of an orbital defect (step 202). The image information of the orbital defect is 3D image information, which is obtained from 3D image information such as CT and MRI. Fig. 4 illustrates such three-dimensional image information. 4(a) shows the orbital defect in the skull, and FIG. 4(b) shows the orbital defect enlarged using a clipping box.

The control device 100 generates and displays a 3D image of the orbital defect including depth information from the image information of the orbital defect (step 204). Thereafter, the control device 100 receives and stores information on the affected area range from the user in the 3D image of the displayed orbital defect, and the area of the affected area is selected as a two-dimensional area using a mouse (step 206). Referring to FIG. 5 illustrating the process of selecting information on the affected area, the left image of FIG. 5 shows a hole formed in the affected area, and the right image of FIG. 5 is the area of the affected area using a mouse. The two-dimensional area for is selected. Here, the 3D image is formed by including depth information of the defect. In more detail, the present invention generates a depth image with depth information of a clipping box, and the depth information is obtained by using a function provided in the openGL Library without directly calculating the depth information. The left image of FIG. 5 is a depth image including acquired depth information. In this program, the closer the color is to white, the deeper the depth.

When the area of the affected area is selected, the control device 100 detects a defective area within the area of the affected area, detects information on the periphery of the defective area, and determines a curved shape of the orbital implant that matches the peripheral area of the defective area. Estimate (step 208). That is, horizontal or vertical lines are assigned to the defective area at predetermined intervals, a curve is calculated using regression analysis for each of the horizontal or vertical lines, and a curved surface is estimated by collecting the calculated curves. That is, in the present invention, after estimating the curved surface calculated for each horizontal line and the curved surface calculated for each vertical line, the average of the two curved surfaces is calculated to estimate the shape of the curved surface of the orbital implant, which is illustrated in FIG. 6.

When the estimated curved shape of the orbital implant is estimated, the control device 100 estimates the final curved shape using Gaussian Smoothing on the curved shape of the orbital implant, and FIG. 7 illustrates the shape of the implant curved surface. As a result, the pink curved surface covering the hole is the shape of the implant surface.

Thereafter, the control device 100 receives a 2D range to form an actual implant from among the curved shapes of the orbital implant according to the user's request through the user interface 106 (step 210). The process of setting the two-dimensional range is illustrated in FIG. 8, which is set as a two-dimensional interface of mouse click and drag.

Thereafter, when a two-dimensional range of the curved shape of the orbital implant is set, the control device 100 displays a three-dimensional curved shape for the set two-dimensional range, and is orthogonal to the shape of the orbital implant corresponding to the two-dimensional range. A pattern consisting of vertical or horizontal guide lines is displayed (step 212). The three-dimensional curved surface shape for the two-dimensional range is as illustrated in FIG. 9, and a pattern composed of vertical or horizontal guide lines orthogonal to the three-dimensional curved surface shape for the two-dimensional range is shown in Fig. 10 and As illustrated in FIG. 11. In this case, the formed pattern shape is set to have a rectangular shape or a square shape, but various types or types of patterns may be selected.

Here, the control device 100 may select a round pattern, such as a circle, an oval, or a triangular pattern as a pattern type according to the user's request through the user interface 106, and design the orbital implant in the selected pattern shape. Yes (steps 214 and 216). In particular, as shown in FIG. 14, when a round pattern is selected, a shape approximate thereto is reflected on the curved surface. That is, by repeatedly applying a round pattern to the depth image, it is possible to easily design screw holes at regular intervals on a curved surface. Through this, when the existing screw hole cannot be used due to the processing of the implant, the screw hole is insufficient unlike the initial expectation, or if it needs to be processed and transformed and applied at the surgical site, the implant design has a pattern formed of holes that can be screwed. Can be solved.

Thereafter, when any one of the vertical or horizontal guide lines is selected from the pattern consisting of the vertical or horizontal guide lines through the user interface 106, the control device 100 has a depth-direction shape corresponding to the selected guide line. A depth direction guide line indicating is displayed to guide the user (steps 218 and 220). Here, both ends of the depth direction guide line are formed as curves for estimating the curvature of the bone at the defect, and the rest are set as initial values.

Thereafter, the control device 100 checks whether a user requests to change the depth direction guide line indicating the depth direction shape corresponding to the selected guide line through the user interface 106 (step 222). When the change of the depth direction guide line is requested, the control device 100 changes the shape of the orbital implant to have the curved surface requested by the user by changing the change requested depth direction guide line (step 224). 12 illustrates this shape change process. 12 illustrates a process of generating a volume by generating a new curved surface in which the estimated implant surface is shifted (slightly moved) in the direction of creating a depth image, and then a side surface connecting the upper and lower surfaces is calculated. When a volume generation button (shortcut key) is pressed by the user, the above process is automatically performed.

While repeating this process, the user performs modeling of the shape of the orbital implant while changing the shape of the depth direction for each guide line, and FIG. 14 illustrates the shape of the orbital implant formed accordingly. 14 illustrates an orbital implant created through this process. In this case, FIG. 14 is an example showing the formation of an orbital implant in which a screw hole is replaced with a pattern through user selection of a pattern.

In this case, the control device 100 may perform a process of selecting a curved surface to be additionally used by the user through the user interface 106 (step 226). For example, as described above, a depth image is given and used for calculating a curved surface, but may be used as a two-dimensional interface for determining a curved surface to be used. In other words, due to the nature of the depth image created by projecting a 3D area with a specified range, a pixel has information about the space projected to itself in the 3D area, and whether to use it to use a curved surface in this area. It is set as a two-dimensional interface to determine.

As shown in Fig. 13, by using a depth image from the estimated implant surface, on/off depending on whether or not to use the curved surface for each pixel area of the depth image. It can be set to be, and through this, it is possible to control a three-dimensional curved surface (step 228).

As described above, an orbital implant is formed in which the screw hole described through FIG. 14 is replaced with a pattern, and at this time, the curved surface to be used additionally through steps 226 and 228 can be set through the on/off control. As shown in Fig. 15, a screw hole can be designed. Here, FIG. 15 shows an example in which the orbital implant detective in which the screw hole set in FIG. 14 is replaced with a pattern, by controlling the user's curved surface on/off according to the user's selection, forms the pattern only in the setting area.

When the user requests the end of shape modeling of the orbital implant through the user interface 106 (step 230), the control device 100 stores orbital implant shape information, which is 3D information on the shape of the orbital implant, and stores the orbital implant. Calculate the volume of Subsequently, when the user requests the manufacture of an orbital implant through the user interface 106, the control device 100 performs 3D printing according to 3D information on the shape of the orbital implant to manufacture the orbital implant (step 232). .

As described above, the technical ideas described in the embodiments of the present invention may be implemented independently, respectively, and may be implemented in combination with each other. In addition, the present invention has been described through the embodiments described in the drawings and the detailed description of the invention, but this is only illustrative, and various modifications and equivalent other embodiments are provided from those of ordinary skill in the art to which the present invention pertains. It is possible. Therefore, the technical protection scope of the present invention should be determined by the appended claims.

100: control device
102: memory unit
104: input/output interface
106: user interface
108: display controller
110: display
112: external device interface
114: 3D printer

Claims (10)

In the method for modeling and manufacturing an orbital implant,
(a) receiving information on an orbital defect;
(b) As a shape corresponding to the edge of the defective area, the curved shape of the orbital implant provided with an edge that follows the curved surface of the bone of the defective area is estimated, and the orbital implant area is determined for the estimated curved shape of the orbital implant. Receiving an input;
(c) receiving a type or type of a pattern for the estimated curved shape of the orbital implant corresponding to the orbital implant area;
(d) giving guide lines to the estimated curved shape of the orbital implant corresponding to the orbital implant region;
(e) When any one of the guide lines is selected, a guide line in the depth direction is displayed for the selected guide line, and when a change to the guide line in the depth direction is requested, the guide in the depth direction according to the request A method for modeling and manufacturing an orbital implant, comprising: generating shape information of the orbital implant by changing the line in the depth direction. The method of claim 1,
The information on the orbital defect is 3D image information on the affected area selected by the user,
Lines at predetermined intervals are assigned to the 3D image information in a horizontal or vertical direction,
For each of the lines, the curve of the bone at the edge of the defect is calculated based on the amount of change in the depth direction, and the curved surface indicated by the calculated curves for each of the lines is estimated to estimate the shape of the curved surface of the orbital implant. Method for orbital implant modeling and fabrication. The method of claim 1,
The information on the orbital defect is 3D image information on the affected area selected by the user,
For the 3D image information, lines at a predetermined interval in the horizontal direction are given, the curve of the bone at the edge of the defect is calculated based on the amount of change in the depth direction for each of the lines, and calculated for each of the lines. Estimate the shape of the orbital implant by estimating the curved surface indicated by the curves,
For the 3D image information, lines at a predetermined interval in the vertical direction are given, the curve of the bone at the edge of the defect is calculated based on the amount of change in the depth direction for each of the lines, and calculated for each of the lines. Estimate the shape of the orbital implant by estimating the curved surface indicated by the curves,
A method for modeling and manufacturing an orbital implant, characterized in that the average of the curved shapes of the orbital implant is calculated to estimate the shape of the final orbital implant. The method of claim 1,
(f) when selecting a curved surface to be used, controlling a curved surface to be used or a curved surface not to be used by setting on/off of each pixel of the depth image in the curved shape of the orbital implant; And methods for making. The method of claim 1,
The method for modeling and manufacturing an orbital implant, characterized in that the pattern in step (c) is in the form of a screw hole. In an apparatus for modeling and manufacturing an orbital implant,
A user interface unit in charge of an interface with a user; And
Receive information on the orbital defect,
As a shape corresponding to the edge of the defective area, the curved shape of the orbital implant provided with an edge that follows the curved surface of the bone of the defective area is estimated,
Receiving the type or type of the orbital implant area and pattern for the estimated curved shape of the orbital implant,
Guide lines are given to the estimated curved shape of the orbital implant corresponding to the orbital implant area,
When any one of the guide lines is selected, a guide line in the depth direction is displayed for the selected guide line, and when a change to the guide line in the depth direction is requested, the guide line in the depth direction is reduced to a depth according to the request. A device for modeling and manufacturing an orbital implant, comprising: a control device for changing the direction to generate shape information of the orbital implant. The method of claim 6,
The information on the orbital defect is 3D image information on the affected area selected by the user,
Lines at predetermined intervals are assigned to the 3D image information in a horizontal or vertical direction,
For each of the lines, the curve of the bone at the edge of the defect is calculated based on the amount of change in the depth direction, and the curved surface indicated by the calculated curves for each of the lines is estimated to estimate the shape of the curved surface of the orbital implant. A device for modeling and manufacturing an orbital implant. The method of claim 6,
The information on the orbital defect is 3D image information on the affected area selected by the user,
For the 3D image information, lines at a predetermined interval in the horizontal direction are given, the curve of the bone at the edge of the defect is calculated based on the amount of change in the depth direction for each of the lines, and calculated for each of the lines. Estimate the shape of the orbital implant by estimating the curved surface indicated by the curves,
For the 3D image information, lines at a predetermined interval in the vertical direction are given, the curve of the bone at the edge of the defect is calculated based on the amount of change in the depth direction for each of the lines, and calculated for each of the lines. Estimate the shape of the orbital implant by estimating the curved surface indicated by the curves,
An apparatus for modeling and manufacturing an orbital implant, characterized in that the average of the curved shapes of the orbital implant is calculated to estimate the shape of the final orbital implant. The method of claim 6,
The control device, when receiving a request for selection of a curved surface to be used from the user interface unit, controls the used or unused curved surface by setting on/off of each pixel of the depth image in the curved shape of the orbital implant. A device for modeling and manufacturing orbital implants. The method of claim 6,
The device for modeling and manufacturing an orbital implant, characterized in that the pattern is in the form of a screw hole.

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