KR102678507B1 - measurement system of artificial bone using studio - Google Patents

Abstract

According to one aspect of the present invention, a studio forming a dark room for photographing a cut cross section of an artificial bone; A bone fixing unit installed on one inner side wall of the studio to fix and couple one end of the artificial bone; A 3D camera unit installed on the inner wall of the studio opposite the bone fixation unit to obtain three-dimensional shape information by taking three-dimensional photographs of the joint part of the artificial bone; And a control unit that reads the three-dimensional shape information acquired through the 3D camera unit and extracts the three-dimensional shape of the joint and the slope value of the cutting cross section. A joint measurement system of an artificial bone using a studio including a.

Description

Joint measurement system and measurement method of artificial bone using studio {measurement system of artificial bone using studio}

The present invention relates to a joint measurement system and method of an artificial bone using a studio. More specifically, the joint shape and joint cut cross-section of an artificial bone used in artificial joint simulation surgery are measured using a 3D camera in a studio with a dark room structure. This relates to a measurement system and measurement method for the joints of artificial bones using a studio that obtains data to determine the shape specificity and surgical suitability of artificial bone joints by taking pictures.

As we enter the aging age, the lifespan of the knee joint has become more important, and the need for partial replacement artificial knee joints has become more important.

When the knee joint is highly deformed due to osteoarthritis of the knee or chronic rheumatism, surgery to replace it with an artificial joint is performed to restore normal function.

An artificial joint is an implant that replaces a destroyed joint when part of a person's joint does not function properly due to arthritis, trauma, etc. Replacement surgery for such artificial joints is performed by cutting part of the bone in the joint area to be replaced and then implanting an implant in that location.

When the knee joint is highly deformed due to osteoarthritis of the knee or chronic rheumatism, surgery to replace it with an artificial joint is performed to restore normal function.

This replacement surgery requires a high level of surgical skill.

Implants used in replacement surgery, that is, artificial joints, can be broadly divided into a tibia insertion member, a femur insertion member, and an insert located between the two and performing a bearing role.

In order to implant the tibial insertion member and the femoral insertion member, the proximal end of the tibia and the distal end of the femur must be cut to a certain amount. Since the attachability of the insertion member depends on the slope of the cutting surface and the amount of cutting, this cutting operation requires a high degree of precision. and proficiency are required.

However, the precision and skill of this replacement surgery are accumulated and improved through long-term surgical experience, so there is a problem of the risk of medical accidents and aftereffects due to the procedure by an unskilled person.

In particular, there was a problem that the skill level could not be easily improved due to difficult conditions such as the physical conditions of each patient being different and the replacement surgery having to be performed with the tibia and femur bent at an unspecified angle.

Therefore, there is a demand for the development of an artificial joint simulation surgery assistance device that allows people to practice and learn replacement surgery by creating a variety of simulated situations similar to the real thing.

Meanwhile, in partial replacement artificial knee joint surgery, the angle of the cross-section is one of the factors that determine the success of the surgery, and there is a need to measure whether the cut cross-section of the artificial joint cut through the simulated surgery is cut at an appropriate inclination of less than 3 degrees. Since the shape of the joint that is the subject of surgery must be identified and surgical treatment in an appropriate form must be performed, it is necessary to identify the shape specificity of the joint.

Republic of Korea Patent No. 10-2019889

The present invention was developed to solve the problems of the prior art. The shape of the joint and the cut cross section of the artificial bone used in artificial joint simulation surgery are photographed with a 3D camera in a studio with a dark room structure to determine the shape of the artificial bone joint. The purpose is to provide a joint measurement system and measurement method for artificial bones using a studio to obtain data to determine specificity and surgical suitability.

Another object of the present invention is to increase the accuracy of photography by installing the position of the artificial bone in a bone fixer capable of multi-axis movement and accurately positioning and setting it at the shooting position of the camera, thus minimizing the positional manipulation of the shooting camera.

Another purpose of the present invention is to measure the bone cross-section cut through a simulated surgery using a 3D camera, so that the slope and cutting amount of the cut surface can be converted into data and fed back, which can be used as learning evaluation material and improve the accuracy and skill of the procedure. It's in order.

According to one aspect of the present invention, a studio forming a dark room for photographing a cut cross section of an artificial bone; A bone fixing unit installed on one inner side wall of the studio to fix and couple one end of the artificial bone; A 3D camera unit installed on the inner wall of the studio opposite the bone fixation unit to obtain three-dimensional shape information by taking three-dimensional photographs of the joint part of the artificial bone; And a control unit that reads the three-dimensional shape information acquired through the 3D camera unit and extracts the three-dimensional shape of the joint and the slope value of the cutting cross section. A joint measurement system of an artificial bone using a studio including a.

At this time, the studio forms a flat upper cover, forms side walls extending downward at two opposing locations of the upper cover, and has a shield that can be opened and closed on the remaining opposing surface of the upper cover that does not form the side walls. can be formed.

In addition, the shielding film is characterized by using a blackout curtain to block light, and the blackout film is rail coupled to a curtain rail installed on the bottom of the upper cover.

In addition, the bone fixing part includes a holder part that fixes and couples one end of the artificial bone; a y-axis rail guide that couples the holder portion to a rail so that it can move in the y-axis direction; a z-axis rail guide that couples the y-axis rail guide to enable movement in the z-axis direction; and an x-axis rail guide that couples the z-axis rail guide to be movable in the x-axis direction.

According to another aspect of the present invention, a first step of fixing and combining one end of the artificial bone using a bone fixer; Step 2: setting the joints of the artificial bone to the 3D camera position using the x, y, and z axis rail guides of the bone fixation unit; Step 3: Close the shield on the side of the studio to create a dark room inside; Step 4: measure the depth value of multiple points of the artificial bone cutting cross section by shooting with a 3D camera; 5 steps to actually measure the horizontal, vertical, and diagonal lengths of the artificial bone cutting cross section; and 6 steps of calculating the slope of the artificial bone cutting cross section based on the measured value. A method of measuring the joint of an artificial bone using a studio including the following may be provided.

At this time, the fourth step is characterized by dividing the cutting cross-section of the artificial bone into eight radial points and measuring the depth value for each of the eight points and the center point.

In addition, in step 6, a triangle is drawn with half of the measured cross-sectional length (diameter) of the artificial bone cut as the base and the height is the depth difference between the center point and a specific point among the 8-way outer points, and calculation is performed using the inverse tangent function. It is characterized by determining the suitability of the corresponding cutting cross section for installation of an artificial knee joint by obtaining the cross-sectional inclination in eight directions.

The present invention uses a 3D camera to photograph the joint shape and joint cut cross-section of an artificial bone used in artificial joint simulation surgery in a studio with a dark room structure, with external light sources completely blocked, thereby preventing interference and distortion caused by external light sources. This has the effect of preventing the phenomenon and increasing the clarity and accuracy of the captured image, allowing the shape specificity and surgical suitability of the artificial bone joint to be judged with a high level of reliability.

In addition, the present invention has the effect of minimizing the positional manipulation of the camera by installing the artificial bone on a bone fixation unit capable of multi-axis movement and setting it to the camera's shooting position, thereby increasing the shooting precision.

In addition, the present invention measures the bone cross-section cut through a simulated surgery using a 3D camera, so that the slope and cutting amount of the cut surface can be converted into data and fed back, which can be used as learning evaluation material and improves the accuracy and proficiency of the procedure. has

Figure 1 is a perspective view showing a system for measuring joints of artificial bones according to the present invention.
Figure 2 is a perspective view showing the curtain rail structure according to the present invention.
Figure 3 is a perspective view showing a bone fixation unit according to the present invention.
Figure 4 is a perspective view showing the holder part of Figure 3.
Figure 5 is an enlarged view showing the main part of the y-axis rail guide and Z-axis rail guide structures of Figure 3.
Figure 6 is a conceptual diagram showing measurement points of the artificial bone cutting cross section according to the present invention.
Figure 7 is an illustration of calculating the cross-sectional slope of artificial bone cutting according to the present invention.
8A and 8B are conceptual diagrams showing a cross-sectional front imaging method and a cross-sectional vertical imaging method according to the present invention.
Figure 9 is a flow chart explaining the method of measuring the joint portion of an artificial bone according to the present invention.

Specific structural or functional descriptions of the embodiments according to the concept of the present invention disclosed in this specification are merely illustrative for the purpose of explaining the embodiments according to the concept of the present invention. They may be implemented in various forms and are not limited to the embodiments described herein.

Since the embodiments according to the concept of the present invention can make various changes and have various forms, the embodiments will be illustrated in the drawings and described in detail in this specification. However, this is not intended to limit the embodiments according to the concept of the present invention to specific disclosed forms, and includes changes, equivalents, or substitutes included in the spirit and technical scope of the present invention.

Terms such as first or second may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component, for example, a first component may be named a second component, without departing from the scope of rights according to the concept of the present invention, Similarly, the second component may also be referred to as the first component.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between. Expressions that describe the relationship between components, such as “between”, “immediately between” or “directly adjacent to”, should be interpreted similarly.

The terminology used herein is only used to describe specific embodiments and is not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "include" or "have" are intended to designate the presence of a described feature, number, step, operation, component, part, or combination thereof, and one or more other features or numbers, It should be understood that this does not exclude in advance the possibility of the presence or addition of steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms as defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings they have in the context of the related technology, and unless clearly defined in this specification, should not be interpreted in an idealized or overly formal sense. No.

Hereinafter, embodiments will be described in detail with reference to the attached drawings. However, the scope of the patent application is not limited or limited by these examples. The same reference numerals in each drawing indicate the same members.

Figure 1 is a perspective view showing a system for measuring a joint of an artificial bone according to the present invention, Figure 2 is a perspective view showing a curtain rail structure according to the present invention, and Figure 3 is a perspective view showing a bone fixation unit according to the present invention. Figure 4 is a perspective view showing the holder part of Figure 3, Figure 5 is an enlarged view of the main part showing the y-axis rail guide and Z-axis rail guide structures of Figure 3, and Figure 6 is a measurement of the artificial bone cutting cross section according to the present invention. It is a conceptual diagram showing the points, Figure 7 is an example of calculating the cross-sectional slope of artificial bone cutting according to the present invention, Figures 8a and 8b are conceptual diagrams showing the cross-sectional anterior imaging method and the cross-sectional vertical imaging method according to the present invention, and Figure 9 is This is a flow chart explaining the method of measuring the joint part of an artificial bone according to the present invention.

As shown in the drawing, the artificial bone joint measurement system according to the present invention largely consists of a studio 110, a bone fixation unit 120, and a camera unit 130.

First, explaining the configuration of the studio 110, the studio 110 provides a dark room structure to block interference from an unspecified light source coming from the outside when photographing a joint or a cut cross section of the artificial bone 10. .

Such a studio 110 must be able to provide a shielding structure to separate the inside and outside spaces, as well as an installation frame structure for fixing artificial bones or installing cameras.

1 shows the form of an embodiment of the studio 110 of the present invention. Referring to FIG. 1, the studio 110 forming a closed surface in three directions may be provided.

The studio 110 forms a flat upper cover 111, and side walls 113 extending downward at two opposing locations of the upper cover 111.

This is used by installing both side walls 113 so that they are supported on the floor, and provides a form in which the floor direction and the two side directions are open.

At this time, the floor direction is naturally sealed with the studio 110 installed, and a shield 115 that can be opened or closed can be installed on the two open side directions.

For example, a shielding film 115 that can be opened and closed can be installed on the remaining opposing surface of the upper cover 111 that does not form the side wall 113. The shielding film 115 may be a type of blackout film to block light. .

The form of the studio 110 illustrated through FIG. 1 is only an exemplary form, and various types of studios may be used to achieve this purpose.

Meanwhile, the blackout curtain in the present invention may, in more detail, be a blackout curtain or a blackout blind. This type of blackout is installed on the bottom of the upper cover 111, and a curtain rail 117 is formed on the upper cover 111, and can be installed by combining the shielding membrane 115 with the curtain rail 117.

Figure 2 is a perspective view showing a curtain rail structure according to the present invention, and a curtain rail 117 structure in the form of a square frame is disclosed.

Referring to Figure 2, a hollow tube having a "ㅁ" shaped cross section is joined along the lower edge of the upper cover 111, and the center of the bottom of the hollow tube is cut in the longitudinal direction to form a rail groove 117a. Make it possible.

At this time, the rail member 118 as shown in FIG. 2 is inserted into the rail groove 117a of the curtain rail 117 and moves along the rail groove 117a. The rail member 118 includes a slider part 118a that is inserted into the rail groove 117a to prevent separation, and a hook-shaped hook part that extends from the bottom of the slider part 118a and catches the top of the shielding film 115. It can be formed as (118b).

At this time, a ring-shaped ring hole may be formed on the shielding film 115 side through which the ring portion 118b can be inserted and hung.

Although one embodiment of the rail member 118 is disclosed through FIG. 2, it is not limited to this form, and various types of rail members that perform the same role and function may be provided.

Hereinafter, the bone fixation unit 120 will be described with reference to FIGS. 1, 3, and 5.

As shown in the accompanying drawings, the bone fixing unit 120 of the present invention is installed on one inner side wall of the studio 110 and provides a structure for fixing and coupling one end of the artificial bone 10.

The bone fixing unit 120 is largely composed of a holder unit 121, a y-axis rail guide 122, a z-axis rail guide 123, and an x-axis rail guide 124.

First, the holder portion 121 will be described with reference to FIG. 4 . The holder portion 121 is a component for fixedly coupling one end of the artificial bone 10, and is formed with a holder body 121a having a cup-shaped receiving space into which the joint portion 11 of the artificial bone 10 is inserted. .

The holder body 121a forms a wall with one side open and the other side closed. A key block 121b is protruding from the outer surface of the wall. The key block 121b is manufactured in the form of a square or cylindrical block and is inserted into the y-axis rail groove 122a of the y-axis rail guide 122, which will be described later. are combined. There is an expanded space inside the y-axis rail groove (122a) to prevent separation after the key block (121b) is inserted, and the key block (121b) in the rail-combined state is the length of the y-axis rail guide (122). The slide moves according to the direction.

At this time, while the artificial bone 10 is inserted into the holder body 121a, the movement of the artificial bone 10 can be fixed by engaging a fastening bolt on the outer surface of the holder body 121a.

Hereinafter, the y-axis rail guide and the z-axis rail guide will be described with reference to FIG. 5.

Figure 5 is an enlarged view showing the main part of the y-axis rail guide and Z-axis rail guide structures of Figure 3.

When describing the y-axis rail guide 122 with reference to FIG. 5, a y-axis rail groove 122a extending longitudinally is formed on the front of the body extending laterally, and a z-axis rail groove 122a is formed at the center of the rear of the body. The rail is coupled to the rail guide 123 side to form a y-axis rail block 122b that moves up and down in the longitudinal direction.

The y-axis rail groove 122a may form an outer cut groove, and an expanded inner groove may be formed inside the cut groove.

In addition, the y-axis rail block (122b) has a ball bearing ( 122c) may be built-in.

At this time, a bolt fastening hole 122d may be formed in the y-axis rail block 122b to fix the position. The position can be fixed or released through a tightening or loosening operation by attaching a separate tightening bolt to the bolt fastening hole 122d.

Hereinafter, the z-axis rail guide 123 will be described.

As shown in FIG. 5, the z-axis rail guide 123 provides a rail-coupled configuration to enable movement of the y-axis rail guide 122 in the z-axis direction (longitudinal direction).

The z-axis rail guide 123 forms a z-axis rail groove 123a in the longitudinal direction of the body extending in the longitudinal direction. The z-axis rail groove 123a may be formed on two opposing surfaces of the body. The z-axis rail groove 123a may have a hemispherical cross-section to guide the rolling movement of the ball bearing 122c.

In addition, at the bottom of the body of the z-axis rail guide 123, a z-axis rail block 123b is formed by wrapping and combining the outer surface of the body of the x-axis rail guide 124 in a "ㄷ" shape, and the z-axis rail block ( Slide protrusions 123c that slide in contact with the x-axis rail guide 124 may be formed on both wings of 123b).

At this time, a bolt fastening hole (123d) may be formed in the z-axis rail block (123b) to fix the position. The position can be fixed or released through a tightening or loosening operation by attaching a separate tightening bolt to the bolt fastening hole 123d.

Hereinafter, the x-axis rail guide 124 will be described.

As shown in FIG. 1, the ) is coupled to the side wall 113.

The x-axis rail guide 124 forms x-axis rail grooves 124a in the longitudinal direction on both sides of the body so that the slide protrusions 123c of the z-axis rail block are aligned and slide.

Hereinafter, the 3D camera unit 130 will be described.

The 3D camera unit 130 is installed on the inner side wall 113 of the studio 110 on the opposite side of the bone fixing unit 120 to acquire three-dimensional shape information by taking three-dimensional photographs of the joint part of the artificial bone 10, or to obtain three-dimensional shape information of the joint part. Allows you to obtain the slope value of the cutting cross section.

The 3D camera unit 130 in the present invention uses a 3D depth camera. By using this 3D depth camera (hereinafter referred to as a 3D camera), a point cloud indicating the depth of objects within the camera shooting range is generated as dots. (point cloud) can be obtained.

Meanwhile, by installing several 3D cameras in the studio 110 of the present invention and photographing the artificial bone model from various angles, point clouds from various angles can be obtained, and through this, the 3D model can be restored ( reconstruction) becomes possible.

In addition, a control unit 140 is installed to read the three-dimensional shape information obtained through the 3D camera unit 130 and extract the three-dimensional shape of the joint part 11 and the slope value of the cutting cross section.

At this time, the control unit 140 may be provided in the form of a PC including a monitor.

Hereinafter, a method of measuring the joint part (cut cross section) of an artificial bone using a 3D camera will be described with reference to FIG. 9.

First, step 1 (S110) of fixing one end of the artificial bone 10 using the bone fixing unit 120 is performed.

This is a step of installing the artificial bone 10 in the studio 110, and one joint part 11 of the artificial bone 10 is inserted into the holder body 121a of the bone fixing part 120. At this time, the holder body 121a forms a cup-shaped hollow space, and the hollow space has a certain depth to provide a support force supporting the outer circumference of the artificial bone 10 so that the inserted artificial bone 10 is not tilted. can be provided.

A bolt fastening hole 121c can be formed on the outer surface of the holder body 121a, and a separate fixing bolt can be spirally coupled to the bolt fastening hole 121c, and the artificial pressure is applied by the pressing force of the fixing bolt. The bone 10 can be prevented from being separated from the holder portion 121.

At this time, the artificial bone 10 can freely rotate on its axis within the hollow space of the holder body 121a, which makes it possible to change the photographing target surface relative to the camera. Afterwards, once the imaging target surface is confirmed, the movement of the artificial bone 10 can be fixed by tightening the fixing bolt.

Next, perform the second step (S120) of setting the joint part of the artificial bone 10 at the 3D camera position using the y, z, and x axis rail guides 122, 123, and 124 of the bone fixing part 120. do.

For example, the holder portion 121 to which the artificial bone 10 is coupled is coupled to the y-axis rail guide 122 and can adjust its position while moving in the y-axis direction (left and right directions), and the y-axis rail guide ( 122) is coupled to the z-axis rail guide 123 and can adjust its position while moving in the z-axis direction (up and down), and the z-axis rail guide 123 is coupled to the x-axis rail guide 124 The position can be adjusted while moving in the x-axis direction (forward and backward directions).

In this way, the measurement object part of the artificial bone 10 can be aligned to the position of the 3D camera by a multi-axis driving method in which the operations of the y-, z-, and x-axis rail guides 122, 123, and 124 are interconnected.

Next, step 3 (S130) is performed to close the shielding film 115 on the side of the studio 110 to create a dark room inside.

At this time, the shield 115 may be in the form of a blackout curtain or a blackout blind, and is coupled to the curtain rail 117 installed on the upper cover of the studio so that it can be opened or closed.

Next, step 4 (S140) is performed to measure depth values for multiple points of the artificial bone cutting cross section 13 by taking pictures with a 3D camera.

At this time, the user can measure the depth value of a specific point using a dedicated program. Meanwhile, in order to evaluate the slope and cutting amount of the cutting section 13, it is necessary to divide the cutting section into a plurality of measurement points and measure and compare each of these points.

For example, as shown in Figure 6, the cutting cross section 13 of the artificial bone is divided into eight radial points (P1) and the depth values for each of the eight points (P1) and the center point (P2) are It can be measured and evaluated.

Next, step 5 (S150) of actually measuring the horizontal, vertical, and diagonal lengths of the artificial bone cutting cross section 13 and step 6 (S160) of calculating the slope of the artificial bone cutting cross section based on the measured values are performed.

This is the cutting cross-section (13) evaluation step. After cutting the artificial bone, the depth value of each of the nine points, including the center point (P2) and the 8-way outer point (P1) of the cutting cross-section, is measured using a 3D camera, and the horizontal width of the cross-section is measured using a 3D camera. , measure the length vertically and diagonally. The measurement method at this time may be an actual measurement method using a vernier caliper.

Afterwards, as shown in Figure 7, half (1/2L) of the length (L) measured with a vernier caliper is used as the base (D), and a specific point (P1) is selected among the center point (P2) and the 8-way outer point (P1). By drawing a triangle with the depth difference as the height (H) and calculating it using the inverse tangent function, the cross-sectional slope (θ) in eight directions can be obtained, and the suitability of the cut cross-section for artificial knee joint installation can be determined through the slope. do.

FIGS. 8A and 8B are conceptual diagrams showing the cross-sectional front imaging method and the cross-sectional vertical imaging method according to the present invention. The cutting cross-section measurement method of the present invention uses the cross-sectional front imaging method as shown in FIG. 8A and the cross-sectional front imaging method as shown in FIG. 8B to minimize errors. As shown, two methods of cross-sectional vertical imaging can be used to calculate the angle and estimate the angle corresponding to the average value as the angle of the cross-section.

As discussed above, the present invention allows a 3D camera to photograph the joint shape and joint cut cross-section of an artificial bone used in artificial joint simulation surgery in a studio with a dark room structure, with external light sources completely blocked, so that the external light source By preventing interference and distortion and increasing the clarity and accuracy of captured images, the shape specificity and surgical suitability of artificial bone joints can be judged with a high level of reliability.

In addition, the present invention installs the position of the artificial bone on a bone fixation unit capable of multi-axis movement so that it is accurately positioned and set at the camera's shooting position, thereby minimizing the positional manipulation of the shooting camera, thereby increasing the accuracy of shooting and performing a simulated surgery. By measuring the cut bone cross-section using a 3D camera, the slope of the cut surface and the cutting amount are converted into data and fed back, which can be used as learning evaluation material and improve the operator's surgical ability.

Although the embodiments have been described with limited drawings as described above, various modifications and variations can be made by those skilled in the art from the above description. For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent.

Therefore, other implementations, other embodiments, and equivalents of the claims also fall within the scope of the claims described below.

10: Artificial bone 11: Joint part
13: Cutting section 110: Studio
111: upper cover 113: side wall
115: shielding film 117: curtain rail
117a: Rail groove 118: Rail member
118a: slider part 118b: ring part
120: Bone fixing part 121: Holder part
121a: Holder body 121b: Key block
121c: bolt fastening hole 122: y-axis rail guide
122a: Y-axis rail groove 122b: Y-axis rail block
122c: Ball bearing 122d: Bolt fastening hole
123: z-axis rail guide 123a: z-axis rail groove
123b: z-axis rail block 123c: slide projection
123d: bolt fastening hole 124: x-axis rail guide
124a: x-axis rail groove 130: camera unit
140: control unit

Claims (7)

A studio forming a dark room for photographing cutting cross-sections of artificial bones; A bone fixing unit installed on one inner side wall of the studio to fix and couple one end of the artificial bone; A 3D camera unit installed on the inner wall of the studio opposite the bone fixation unit to obtain three-dimensional shape information by taking three-dimensional photographs of the joint part of the artificial bone; And a control unit that reads the three-dimensional shape information obtained through the 3D camera unit and extracts the three-dimensional shape of the joint and the slope value of the cutting cross section.
The bone fixing part includes a holder part that fixes and couples one end of the artificial bone; a y-axis rail guide that couples the holder portion to a rail so that it can move in the y-axis direction; a z-axis rail guide that couples the y-axis rail guide to enable movement in the z-axis direction; And an x-axis rail guide that combines the z-axis rail guide to be movable in the x-axis direction,
The holder part is configured to fix and couple one end of the artificial bone, and the joint measurement system of the artificial bone using a studio in which a holder body having a cup-shaped receiving space into which the joint part of the artificial bone is inserted is formed.
According to paragraph 1,
The studio forms a flat upper cover, forms side walls extending downward at two opposing locations of the upper cover, and forms a shielding film that can be opened and closed on the remaining opposing surface of the upper cover that does not form the side wall. Artificial bone joint measurement system using a studio.
According to paragraph 2,
A joint measurement system for artificial bones using a studio, characterized in that the shield uses a blackout to block light, and the blackout is coupled to a curtain rail installed on the bottom of the upper cover.
delete Step 1: fixing and joining one end of the artificial bone using a bone fixer;
Step 2: setting the joints of the artificial bone to the 3D camera position using the x, y, and z axis rail guides of the bone fixation unit;
Step 3: Close the shield on the side of the studio to create a dark room inside;
Step 4: measure the depth value of multiple points of the artificial bone cutting cross section by shooting with a 3D camera;
5 steps to actually measure the horizontal, vertical, and diagonal lengths of the artificial bone cutting cross section; and
Includes 6 steps of calculating the slope of the artificial bone cutting cross section based on the measured value,
The bone fixing part includes a holder part that fixes and couples one end of the artificial bone; a y-axis rail guide that couples the holder portion to a rail so that it can move in the y-axis direction; a z-axis rail guide that couples the y-axis rail guide to enable movement in the z-axis direction; And an x-axis rail guide that combines the z-axis rail guide to be movable in the x-axis direction,
The holder part is a component for fixedly combining one end of the artificial bone, and the joint part of the artificial bone is measured using a joint measurement system of the artificial bone using a studio in which a holder body having a cup-shaped receiving space into which the joint part of the artificial bone is inserted is formed. method.
According to clause 5,
The fourth step is to divide the cutting cross-section of the artificial bone into eight radial points and measure the depth value for each of the eight points and the center point. Method for measuring joints of artificial bones.
According to clause 5,
The 6th step is to draw a triangle with half of the measured cross-section length (diameter) of the artificial bone cut as the base and the depth difference between the center point and a specific point among the 8-way outer points as the height, and calculate the 8-way distance through calculation using the inverse tangent function. A method of measuring the joint of an artificial bone using a joint measurement system of an artificial bone using a studio, which is characterized by determining the suitability of the cutting cross section for installation of an artificial knee joint by determining the cross-sectional slope of .