KR20230019245A - Nose implants and manufacturing method of nose implants - Google Patents

Abstract

A nasal implant inserted between a nasal bone, nasal cartilage, and nasal skin, comprising: an implant body including an upper part covering the nasal bone and a lower part covering the nasal cartilage; And a vertical guide positioned between the upper and lower parts of the prosthesis body, wherein the vertical guide has a groove shape, the nose implant can be placed in an accurate position on the nasal bone and nasal cartilage of the patient. .

Description

Nose implants and manufacturing method of nose implants

The present invention relates to a method for manufacturing a nose implant, and more particularly, to a method for manufacturing a nose implant that can be customized for a patient for use in rhinoplasty.

Along with the recent increase in interest in beauty, interest in plastic surgery is also explosively increasing. Among the facial parts, rhinoplasty has also been widely popular from before until now, and rhinoplasty is commonly used to enhance the appearance of the nose by inserting artificial implants such as silicone into the nose.

Conventionally, in rhinoplasty surgery, the operator selects an implant that matches the shape of the patient's nose from three implants of various lengths and thicknesses, checks the curvature of the nasal bone and cartilage during surgery, and sculpts the inner mold on which the implant is placed. It was carried out in a manufacturing method.

However, this method has a problem in that it takes a lot of time to sculpt and it is not easy to manufacture an implant in a desired shape by hand-sculpting. In addition, if the implant is not seated in close contact with the nasal bone and cartilage and a space is formed therebetween, side effects such as infection and positional deformation may occur.

Accordingly, an object of the present invention is to solve such conventional problems, and model cartilage based on information obtained from medical images and anatomical information between cartilage for the shape of cartilage that is not identified from medical images, and modeling the cartilage. It is to provide an implant by reflecting the shape of the cartilage.

Provides a nose implant that does not cause side effects such as infection or positional deformation because patient-specific modeling can reduce operation time and adhere closely to the nasal bone and cartilage.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

A nasal implant inserted between a nasal bone, nasal cartilage, and nasal skin, comprising: an implant body including an upper part covering the nasal bone and a lower part covering the nasal cartilage; and a vertical guide positioned between an upper portion and a lower portion of the prosthesis body, wherein the vertical guide provides a nose prosthesis having a groove shape.

The vertical guide may include a side groove recessed into at least one end of the left or right side of the prosthesis body.

The side groove may have a semicircular curve.

The semicircular curve may have a diameter of 1 to 1.5 mm.

The vertical guide may include a rear groove formed at a boundary between a lower portion of the prosthesis body and the prosthesis on the rear surface of the prosthesis body.

A horizontal guide protruding from the rear surface of the lower part of the implant body may be further included, and may be positioned between lower lateral cartilage divided into both sides of the nasal cartilage.

The width seen from the front of the nose implant may become narrower from the upper part of the implant body to the lower part of the implant body.

The upper end of the prosthesis body may further include a glabellar portion extending in the left and right directions.

In the method for manufacturing a nasal implant inserted between the nasal bone, nasal cartilage and nasal skin according to another aspect of the present invention, (a) obtaining a three-dimensional image of the nasal bone and a three-dimensional image of the nasal cavity; (b) modeling the nasal cartilage by applying anatomical information between the nasal bone and the nasal cavity and the nasal cartilage to the 3-dimensional image of the nasal bone and the 3-dimensional image of the nasal cavity; (c) modeling the inner shape of the implant body including an upper part corresponding to the shape of the 3-dimensional image of the nasal bone and a lower part corresponding to the modeled shape of the nasal cartilage; (d) modeling the nose implant by modeling the shape of the implant body based on the target nose shape; and (e) determining a position of a vertical guide located between the top and bottom of the prosthesis body.

The vertical guide may include a side groove located in a lateral direction of the prosthesis body.

Determining the position of the vertical guide may include placing the modeled prosthesis body on the 3D nasal bone image; setting a position where the lower end of the nasal bone and a lateral end of the prosthesis body come into contact with each other as a cutting center point; and cutting the side groove with a plate-shaped cutter having a semicircular curved surface at an end thereof, and cutting the side groove may be performed by positioning the center of the semicircular curved surface of the cutter at the cutting center point. there is.

The plate-shaped cutter may be disposed in a vertical direction at the lateral end of the prosthesis body in a lateral direction, and may be disposed in a direction inclined at 45° to the center of the prosthesis body in a forward direction.

According to the manufacturing method of the nose implant of the present invention as described above, there is an advantage in that the nose implant can be manufactured in a customized manner for each patient using 3D imaging technology.

In addition, since the gap between the nasal cartilage and the implant can be minimized and adhered closely, side effects such as inflammation and positional deformation can be minimized.

In addition, there is an advantage in that the operation time can be shortened because the operator does not need to carve the implant during the operation.

In addition, since the nose implant is manufactured based on the 3D image, there is an advantage in that the surgical result of the patient can be more accurately predicted.

In addition, the nose implant can be placed in an accurate position through the vertical guide and the horizontal guide of the nose implant, and the position of the nose implant can be prevented from being displaced during recovery after surgery or due to impact.

The effects obtainable in the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

1 shows CT images from the side of the face and under the chin, respectively.
FIG. 2 shows a 3D image of skin, bone, and nasal cavity obtained by segmenting the CT image of FIG. 1 .
Figure 3 shows a portion of the process of modeling the nasal cartilage and lateral nasal cartilage according to one embodiment of the present invention.
4 is a diagram of an image comparing whether the enlarged nasal cavity coincides with the height of the nasal bone from the 3D image of the nasal cavity enlarged by applying the first offset and the 3D image of the nasal bone.
FIG. 5 shows part of the process of modeling the nasal cartilage and lateral nasal cartilage following FIG. 3 .
6 shows a comparison between pictures of nasal cartilage and lateral nasal cartilage modeled according to an embodiment of the present invention and actual nasal cartilage.
7 shows a part of a process of modeling nasal septal cartilage according to an embodiment of the present invention.
FIG. 8 shows the nasal bridge cartilage finally modeled by modeling both sides of the nasal septum cartilage according to FIG. 7 and then modeling the nasal ridge line together with the modeled nasal cartilage and lateral nasal cartilage.
9 illustrates a part of a process of modeling a reference shape of an internal mold in which an implant is placed using modeled cartilage according to an embodiment of the present invention.
Fig. 10 shows before and after correcting the concave part between the lateral nasal cartilages to be convex after modeling the mucous membrane.
FIG. 11 is a diagram for explaining the process of FIG. 10 .
FIG. 12 illustrates a process of modeling the inner shape of the implant according to the reference shape in FIG. 10 .
FIG. 13 is a view showing the 3D shape of the nose before molding and the 3D shape of the nose required after molding by modeling.
14 is a diagram for explaining a process of modeling the external shape of a nose implant.
15 is a diagram showing a finally modeled nose implant according to an embodiment of the present invention.
FIG. 16 is a view showing a mold modeled for manufacturing the nose prosthesis of FIG. 15 . do.
17 is a view showing a state in which a conventional nose implant and a nose implant according to the present invention are seated on the nose.
18 is a view showing a nose implant according to an embodiment of the present invention.
19 and 20 are views showing a state in which the nose implant according to an embodiment of the present invention is seated on the nose.
21 and 22 are diagrams illustrating a method of manufacturing a hooking jaw of a nose prosthesis according to an embodiment of the present invention.
23 is a view showing the nasal bone and nasal cartilage.
24 is a cross-sectional view of a nose prosthesis according to another embodiment of the present invention.
25 is a front view of a nose prosthesis according to another embodiment of the present invention.

The specific details of the embodiments are included in the detailed description and drawings.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Hereinafter, the present invention will be described with reference to drawings for explaining a method of manufacturing a nose implant according to embodiments of the present invention.

A method for manufacturing a nose implant according to an embodiment of the present invention includes obtaining a 3D image of the nasal bone and a 3D image of the nasal cavity, modeling the nasal cartilage using the 3D image of the nasal bone and the 3D image of the nasal cavity, and The method may include a step of modeling an internal shape on which the implant is placed based on the 3D image of the nasal bone and the modeled nasal cartilage. In addition, the steps of modeling the entire implant including the outer shape of the implant, modeling a mold for manufacturing the shape of the modeled implant, manufacturing a mold, and manufacturing a nose implant by injecting silicone into the mold can include more.

FIG. 1 shows CT images of the side of the face and under the chin, respectively, and FIG. 2 shows three-dimensional images of skin, bone, and nasal cavity obtained by segmenting the CT image of FIG. 1 .

FIG. 1(a) shows a CT image taken from the side of the face, and FIG. It doesn't work. For reference, the bone here means the tibia that can be grasped on CT, not the cartilage. Accordingly, in the present invention, as will be described later, the shape of the nasal cartilage, which is not confirmed in the CT image, is modeled by applying anatomical elements to the image identified from the CT image, and the seating surface of the nose implant is based on the modeled nasal cartilage. Let's model the endurance type.

First, a 3D image of the nasal bone and a 3D image of the nasal cavity are acquired. Furthermore, a 3D image of the skin may also be acquired to model the appearance of the nose implant. At this time, as a method of segmenting by adjusting the HU (Housefield Unit) value in the CT image, as shown in FIG. (b)) and a 3-dimensional nasal cavity image ((c) in FIG. 2) can be obtained. A method of obtaining an image by adjusting the HU value uses a known technique, and a detailed description thereof will be omitted.

Next, the nasal cartilage is modeled by applying anatomical information to the 3D image of the nasal bone and the 3D image of the nasal cavity. A process of modeling the nasal cartilage will be described in detail below with reference to FIGS. 3 to 8 .

3 shows a part of the process of modeling the nasal cartilage and the lateral nasal cartilage according to an embodiment of the present invention, and FIG. 4 shows a 3D image of the nasal cavity enlarged by applying a first offset and a 3D image of the nasal bone. It is a diagram of an image comparing whether the nasal cavity enlarged from is consistent with the height of the nasal bone, and FIG. 5 shows a part of the process of modeling the nasal cartilage and the lateral nasal cartilage following FIG. 3, and FIG. Pictures of nasal cartilage and lateral nasal cartilage modeled according to the example and actual nasal cartilage are compared and shown, and FIG. 7 shows a part of the process of modeling nasal septal cartilage according to an embodiment of the present invention, and FIG. After modeling both sides of the nasal septum cartilage according to Fig. 7, the bridge line of the nose is modeled, and the finally modeled nasal cartilage is shown together with the modeled nasal cartilage and lateral nasal cartilage.

Nasal cartilage consists of lower lateral cartilage (or Alar cartilage), upper lateral cartilage and septal nasal cartilage. do it with

In the present invention, the nasal cartilage is modeled using a 3D image of the nasal cavity and a 3D image of the nasal bone obtained by segmenting the CT image. As shown in FIG. 3 (a), when the nasal cavity image obtained from the CT image is not symmetrical, the nasal cavity image is selected so that it is symmetrical around the anatomically normal nasal cavity among the images of the left and right nasal cavities. It can be duplicated (Fig. 3(b)). In Figure 3, since the shape of the right nasal cavity (corresponding to the left nasal cavity of the subject) has an anatomically close to normal shape, the left nasal cavity was replicated to be symmetrical to the right.

Next, by applying an offset of an appropriate value to the image (b) of FIG. 3, the image of the nasal cavity is enlarged at a constant ratio to enlarge the size of the nasal cavity (FIG. 3 (c)). At this time, as shown in FIG. 4, comparing whether the height of the nasal bone coincides with the enlarged nasal cavity in a state where the 3D image of the nasal bone and the image of the nasal cavity enlarged by applying an offset are overlapped (portion marked with a circle in FIG. 4) And, an image of the enlarged nasal cavity is obtained by adjusting the offset value so that the enlarged nasal cavity coincides with the height of the nasal bone (which may mean that the enlarged nasal cavity and the nasal bone are naturally connected without a step).

Anatomically, the nasal bone and nasal cartilage have a naturally elongated shape, and the nasal cartilage has a shape similar to the edge of the nasal cavity in the form of a thin film having a predetermined thickness (about 0.5 mm). Therefore, the surface of the nasal cavity enlarged by applying the offset may include the modeling shape of the outer surface of the nasal cartilage.

At this time, the value of the offset can have a value of around 1.5mm, which means that when the image is enlarged by applying a 1.5 mm offset to the image of the nasal cavity on average through clinical trials, it is confirmed that the enlarged nasal cavity matches the height of the nasal bone. is the result obtained. Therefore, it is possible to obtain an enlarged image of the nasal cavity under the above conditions by adjusting the offset value based on the 1.5 mm value. In the following description, an offset value applied when enlarging the image of the nasal cavity so that the height of the nose bone and the nasal cavity coincide with each other is referred to as a first offset and will be described below.

Next, another enlarged image of the nasal cavity can be obtained by applying a second offset obtained by subtracting a predetermined value corresponding to the thickness of the nasal cartilage from the first offset to the image (b) of FIG. d) At this time, 0.5 mm can be set as the value of the thickness of the nasal cartilage, which is a value according to the clinically confirmed average thickness of the nasal cartilage and the lateral nasal cartilage. It may be a value obtained by subtracting mm For example, if the value of the first offset is 1.5 mm, the value of the second offset may be 1 mm.

Therefore, (d) of FIG. 3 forms a reference plane on which the lower surface of the nasal cartilage is located, and (c) of FIG. 3 described above forms a reference plane on which the upper surface of the nasal cartilage is located. Cartilage is located.

5(a) shows an image showing an enlarged nasal cavity by applying a second offset, as in (d) of FIG. The shape of the nasal cavity can be corrected according to the anatomical structure of the nasal cavity (Fig. 5(b)). At this time, compared to the generally known anatomical structure of the nasal cavity, excessively recessed or distorted parts can be corrected in a smooth form by naturally giving volume by connecting the end points of undistorted parts.

Next, from the corrected image, outlines of the nasal cartilage and the lateral nasal cartilage are created based on the area most prominently protruding on the surface of the 3D image (FIG. 5(c)).

Next, as described above, since the thickness of cartilage is 0.5 mm according to the clinical average, it is possible to finally model the nasal cartilage and lateral nasal cartilage by applying a thickness of 0.5 mm to the outer line.

6 shows a comparison between nasal cartilage and lateral nasal cartilage modeled according to the present invention and pictures of actual nasal cartilage. The nasal cartilage and lateral nasal cartilage modeled according to the present invention are anatomically almost identical to the actual nasal cartilage It can be confirmed that it is modeled appropriately.

In this embodiment, the process of modeling the entire nasal cartilage and lateral nasal cartilage has been described with drawings, but the actual nose implant is seated on the upper surface of the nasal cartilage and lateral nasal cartilage, so the first offset is Only the top surface of the nasal cartilage is modeled from the applied image, and as will be described later, it can be used to model the inner shape of the nose implant.

Hereinafter, a process of modeling the septal cartilage will be described.

Anatomically, most of the surfaces of the inner mold on which the nose implant is seated are supported by the nasal cartilage and the lateral nasal cartilage, but in this embodiment, a process of modeling the nasal septal cartilage may be further included to increase the modeling accuracy of the nose implant.

As shown in (a) of FIG. 7, the previously modeled nasal cartilage and lateral nasal cartilage are displayed from the CT image, and an area where the septal cartilage can be located between both nasal cavities is selected (Fig. b)). Next, both sides of the septal cartilage can be modeled by applying a third offset to the edge lines of both nasal cavities (Fig. 7(c)). At this time, since the septal cartilage has a thickness of 0.5 to 1 mm, the third offset may be set in consideration of this in the image. In the case of the septal cartilage located between both nasal cavities, both sides of the nasal cavity are modeled in this embodiment by reflecting the anatomical content that the edge line of both nasal cavities adjacent to the nasal septal cartilage is almost coincident.

Next, as shown in FIG. 8, the upper part of the nasal bridge line of the nasal septal cartilage is formed to slightly protrude at a predetermined height between the lateral nasal cartilages on both sides, and the lower part of the nasal bridge line of the nasal septum cartilage is the position of the lower end point of the modeled lateral nasal cartilage and It can be modeled by cutting with a line connecting the end points of the nasal septum. 8 shows the nasal septal cartilage finally modeled in the same manner as described above, and the previously modeled nasal cartilage and lateral nasal cartilage.

After the nasal cartilage is modeled in the above-described method, the endomorph on which the implant is placed is modeled using the 3-dimensional image of the nasal bone and the modeled shape of the nasal cartilage.

9 shows a part of the process of modeling the reference shape of the inner implant in which the implant is placed using cartilage modeled according to an embodiment of the present invention, and FIG. 11 is a view for explaining the process of FIG. 10, and FIG. 12 shows a process of modeling the inner shape of the implant according to the reference shape in FIG. 10, and FIG. 13 is a view showing the three-dimensional appearance of the nose before molding and the three-dimensional appearance of the nose required after molding, and FIG. 14 is a view for explaining the process of modeling the external shape of the nose implant, A nose implant finally modeled according to an embodiment of the present invention is shown, and FIG. 16 shows a mold modeled to manufacture the nose implant of FIG. 15 .

First, as shown in (a) of FIG. 9, the three-dimensional image of the nasal bone and the modeled cartilage are overlapped and positioned, and the lines of the nasal bone and cartilage are connected and integrated as shown in (b) of FIG. Creates the inner line of the implant.

As described above, the enlarged image of the nasal cavity by the first offset forms the upper surface of the nasal cartilage and the lateral nasal cartilage where the implant is placed, so the image enlarged by the first offset and the bone image are connected and integrated. In this way, an internal line of the implant may be created.

Next, in the image (b) of FIG. 9, a fourth offset corresponding to the thickness of the mucous membrane is applied and the image is enlarged at a regular ratio in the same manner as the above method ((c) of FIG. 9). This is to take into account that a mucous membrane of a predetermined thickness is formed on the nasal bone and cartilage. According to the clinical average, the mucosal thickness may be 0.3 mm.

Accordingly, the enlarged image (FIG. 9(c)) by connecting and integrating the 3D images of the nasal bone and the modeled cartilage and applying the fourth offset can finally become the reference plane of the inner shape of the nose implant.

Preferably, the concave part between the modeled lateral nasal cartilages as shown in FIGS. 10 to 11 is naturally extended along the line of the surrounding mucosa (lateral nasal cartilage) as shown in FIG. It can be corrected to make it stand out.

Next, as shown in FIG. 12, a method of creating an implant base 100 extending from the root of the nose to the tip of the nose, and removing the overlapped portion by overlapping the reference plane of the final modeled implant in consideration of the thickness of the mucous membrane. It is possible to model the internal shape of the implant.

After the internal shape of the implant is modeled, the external shape of the implant is modeled. The external shape of the nose implant determines the external shape of the nose after plastic surgery, and can be designed by reflecting the requirements of the operator and/or the opinion of the operator.

At this time, a predetermined thickness (for example, a thickness of around 4 mm) is created based on the internal shape of the implant modeled by the internal shape, and the external shape of the implant is derived in which the requirements of the operator and/or the operator's opinion are reflected. can be modeled. In this process, it is preferable to design the outer shape of the implant so that the increased volume has a value similar to the volume of the implant by obtaining a volume difference between the nose before nose surgery and the nose modeled after nose surgery.

As one embodiment of modeling the external appearance of a nose implant, first, as shown in FIG. can be displayed

Next, the outline of the implant is modeled for each cross section perpendicular to the longitudinal direction of the nose of the implant. FIG. 14 shows cross-sections of an implant modeled by the method described above in which an implant modeled by the method described above is seated on a mucous membrane in order to transform skin before molding, skin after molding, and skin before molding to skin after molding. The height difference can be obtained, and from this, the height of the implant corresponding to the point on the bridge of the nose can be obtained. Next, the outer line of the nose implant can be modeled by performing free curve modeling between the point of the bridge of the nose of the implant obtained by the above method and the inner edge of the implant modeled by the above method based on the shape of the skin after plastic surgery. In this way, the outer shape of the nose implant can be finally modeled by modeling the outer line for each cross section and smoothly extending the outer lines obtained for each cross section.

15 shows an embodiment of the shape of the nose implant 200 finally modeled by the above method.

Next, a mold 300 for manufacturing a nose implant in the form of the modeled nose implant 200 is modeled as shown in FIG. 16 . An injection port 310 and an outlet port 320 may be formed at upper and lower positions of the prosthesis mold 300 to inject and discharge silicone for manufacturing a nose implant, respectively. According to the embodiment, the injection hole 310 is formed on the glabellar side of the implant, but is not limited thereto, and may be formed on the tip of the nose. The mold 300 modeled as described above may be manufactured using a 3D printer, but is not limited thereto.

17 shows a state in which a conventional nose implant and a nose implant according to the present invention are seated on the nose. 17(a) shows a state in which a nose implant selected from a set of conventional nose implants is seated on the nose, and FIG. In the case of the prior art, the nose implant does not adhere to the cartilage to form a space between them, whereas in the case of the present invention, the nose implant made to fit the patient can be adhered to the cartilage to avoid side effects such as inflammation or positional deformation. can be minimized

18 is a view showing the nose implant 200 according to an embodiment of the present invention, and FIGS. 19 and 20 show a state in which the nose implant 200 according to an embodiment of the present invention is seated on the nose. it is a drawing

18 is a perspective view of the nose implant 200 and FIG. 19 is a front view of the nose implant.

The nose implant 200 includes an implant body 210 made of a soft material such as silicon and extending vertically. The implant body 210 may include an upper body 211 covering the nasal bone 10 and a lower body 212 covering the nasal cartilage 20 .

The nose implant 200 may have a shape elongated vertically from the front, and a shape viewed from the side may have a curved shape depending on the shape of the nasal bone 10 and the nasal cartilage 20 and the desired shape of the nose.

As shown in FIG. 6 (b), the nose implant 200 designed and manufactured by the above method is inserted by incising the lower part of the columellar part of the nose and lifting the skin. It can be opened up to the root of the nose (radix, nasion), but the root of the nose can be pushed in from the bottom while being covered.

In the implant body 210, the upper body 211 and the lower body 212 form a continuous surface, so that when the implant is inserted into the incision during surgery, the implant is placed on the nasal bone 10 and the nasal cartilage 20 of the patient. It is difficult to determine the exact location of the body 210. In some cases, it may be biased more upward or downward from an accurately designed position, so a guide that can serve as a standard for the insertion position of the nose implant 200 is required for the operator. That is, if the implant is pushed upward, the end of the implant on the glabella side may be rolled or folded after surgery, and if the dead space in the middle does not fit properly, it may cause aftereffects or reoperation. Or, if it is pushed in less and the lower side remains longer, and the dead space in the middle does not fit properly, it may cause sequelae or reoperation.

If the top and bottom position of the implant is not properly inserted, the bottom of the implant does not match the shape of the bone, so the implant may be pushed to either side of the nose while it is seated in the nose tissue after surgery. Ultimately, it becomes a crooked nose shape, and it can cause sequelae or reoperation.

Referring to FIG. 19 , the human nose is composed of a nasal bone 10 having rigidity as a part of the skull at the top and a soft nasal cartilage 20 that is connected to the lower end of the nasal bone 10 and can be bent. The upper part of the nasal cartilage body 211 and the lower part of the body 212 cover different parts (nasal bone/nasal cartilage), so there is a difference in shape or thickness.

Therefore, when the upper body 211 is located on the nasal cartilage 20 or the lower body 212 is located on the nasal bone 10, a result different from the designed nose shape can be obtained, and the vertical position is accurately positioned. It is important to do

A vertical guide 230 may be provided between the upper body 211 and the lower body 212 so that the upper body 211 is located on the nasal bone 10 and the lower body 212 is located on the nasal cartilage 20.

The vertical guide 230 is a groove formed in the implant body 210 so as to be caught on the lower end 30 of the nose bone, and the vertical guide 230 of the embodiment shown in FIG. 18 is at the lateral end of the implant body 210. The formed side grooves 230 and 231 may be included.

The lower end 30 of the nasal bone 10 includes a non-bong point 31 (rhinion), and the lower end 30 of the nasal bone 10 has an inverted V-shape extending downward in the left and right directions from the non-bong point 31 there is. The non-bong point 31 is a portion between the nasal bone 10 and the nasal cartilage 20 and is also called a hook, and may generally have a slightly protruding shape from the bridge of the nose.

Since the lower end 30 of the nasal bone 10 is in the shape of an inverted V, the side grooves 230 and 231 formed in the left and right lateral directions are slightly twisted around the non-bong point 31 and are located up and down, so that they are not on the same line. can be positioned with each other.

Referring to FIG. 19, side grooves 230 and 231 are shown in an embodiment located on both left and right sides.

When the side grooves 230 and 231 are located on the left and right, they can be placed in more accurate positions.

However, it is not necessarily necessary to form all of the side grooves 230 and 231 on both sides, and even if they are formed only on one side of the left and right sides, it is possible to prevent a large displacement in the vertical direction.

21 and 22 are diagrams illustrating a method of manufacturing the vertical guide 230 of the nose implant 200 according to an embodiment of the present invention. After manufacturing the prosthesis body 210 by the above-described method, the designed prosthesis body 210 may be placed on the nasal bone modeling.

The cutter shown in FIGS. 21 and 22 is a virtual tool for forming vertical guides 230 and 231 in the prosthesis body 210 designed on modeling, and has a plate shape with a cutting blade at one end. In the cutter, the shape of the side grooves 230 and 231 is determined according to the shape of the cutting blade, and in this embodiment, the cutting surface of the cutter may have a semicircular curved cross section in the thickness direction.

As shown in (a) of FIG. 21 , the cutter may be disposed inclined at an angle of 45° to the left and right based on the center of the nose in the left and right directions of the human body. The cutter on the left and the cutter on the right can be connected to form a 90° angle to form a V-shaped integral type.

However, as shown in (b) of FIG. 21, since the nasal bone 10 of the human body may be left and right asymmetric, the left and right cutters may be separated and configured in an independent form. As shown in (b) of FIG. 21 , the vertical guides 230 and 231 of the nose implant 200 applied to the asymmetric nasal bone 10 may be formed asymmetrically.

As shown in FIG. 22 , the direction of the cutter viewed from the side may be arranged perpendicular to the lateral end of the prosthesis body 210 .

The prosthesis 200 may be formed to have a semicircular curved surface with the center C being the position where the side end and the lower end of the nasal bone 30 overlap. The diameter of the semicircle of the side groove 230 may have a diameter of about 1-1.5 mm, and the depth of the side grooves 230 and 231 may have a depth of 0.5 to 0.75 mm.

If the depth of the side grooves (230, 231) is 0.5 mm or less, it is difficult for the side grooves (230, 231) to get caught in the lower part of the nasal bone (30). Since the side grooves 230 of the nose implant 200 may be exposed in the skin direction, the depth of the side grooves 230 and 231 is preferably formed in the range of 0.5 to 0.75 mm.

The part to be located on the nasal bone 10 and the part to be located on the lower nasal cartilage 20 are distinguished not only in the nose implant 200 manufactured to suit the patient, but also in the ready-made nose implant 200, so that the upper body 211 and the main body It can be formed on the boundary of the lower part 212. The ready-made nose implant 200 can also be manufactured in various shapes such as symmetrical, asymmetrical, and one-sided so that it can be applied to various shapes of the nasal bone 10 .

23 is a cross-sectional view of a vertically cut central portion of a nose prosthesis 200 according to another embodiment of the present invention. The vertical guide 233 of this embodiment is formed in the rear direction of the nose prosthesis 200 and may include a rear groove 233 that is caught on the lower end of the nasal bone 30 with the formed rear groove 233 .

Since the patient-tailored implant according to the embodiment is an implant that can be seated by filling the dead space, there is little possibility that the implant will be pushed to either side of the nose while the implant is seated in the tissue of the nose after surgery. In the case of making it, since it is difficult to fix the entire body in close contact with the human body, there is a high possibility that the implant will be pushed to either side of the nose. In such a case, it becomes a crooked nose shape externally, and it can cause sequelae or reoperation. In order to prevent this, a horizontal guide 220 may be formed to lightly fix the implant to the human body, and the implant may be set so that the implant is lightly fitted into the groove part formed on the human body, so that the implant may be well fixed. Depending on the embodiment, such a horizontal guide 220 may be formed on a patient-specific implant, so that the implant may be further fixed to the human body.

The vertical guide 233 of this embodiment includes a rear groove 233 formed on the rear surface between the upper body 211 and the lower body 212 . .

The rear groove 233 may be formed corresponding to the V-shape at the bottom of the nasal bone 10 and may be continued along the boundary between the upper body 211 and the lower body 212, but the effect on the overall shape of the nose implant 200 is minimized. In order to do so, a rear groove 233 may be formed to be located at one point of the lower end of the nasal bone 30.

24 is a view showing the nasal bone 10 and the nasal cartilage 20. Nasal cartilage (20) consists of a nasal septum (23, septum), upper lateral cartilage (21, upper lateral cartilage) located on the left and right sides of the nasal septum (23), and lower lateral cartilage (22, lower lateral cartilage) located in the nasal area. can be configured.

The aforementioned back groove 233 may be disposed to be positioned between the superior lateral cartilage 21 and the nasal septum 23 .

In addition to the vertical guides 230 and 233 for guiding the vertical position of the nose implant 200, a horizontal guide 220 for aligning the horizontal position of the nose implant 200 in the left and right directions may be further included.

The horizontal guide 220 may protrude from the rear surface of the nose implant 200 in a form inserted at a supratip breakpoint between the lower lateral cartilages 22 .

Since the horizontal guide 220 fills the dead space between the upper lateral cartilage 21 and the lower lateral cartilage 22 and is located between a pair of lower lateral cartilage 22 at the same time, the position in the left and right directions is misaligned. that can be prevented

25 is a front view of a nose prosthesis 200 according to another embodiment of the present invention. The nose implant 200 of the present invention may be configured so that the left and right widths are narrower at the lower part than at the upper part, as shown in FIG. 25(a) for a sleek nose shape.

In addition, in order to naturally form the left and right curves between the eyebrows, the forehead portion 213 extending in the left and right directions may be further provided. When the upper end of the prosthesis body 210 is expanded, the separation area between the skin and the nasal bone 10 needs to be widened to insert the nose prosthesis 200. Should be. Therefore, for convenience during surgery, as shown in (b) of FIG. 25, the end of the brow portion 213 may be configured to have a curve.

According to the manufacturing method of the nose implant 200 of the present invention as described above, there is an advantage in that the nose implant 200 can be manufactured customized for each patient using 3D imaging technology.

In addition, since the gap between the nasal cartilage 20 and the nasal implant 200 can be minimized and brought into close contact, side effects such as inflammation and positional deformation can be minimized.

In addition, there is an advantage in that the operation time can be shortened because the operator does not need to sculpt the nose implant 200 during the operation.

In addition, since the nose implant 200 is manufactured based on the 3D image, there is an advantage in that the surgical result of the patient can be more accurately predicted.

In addition, the nose implant 200 can be placed in an accurate position through the vertical guide 230 and the horizontal guide 220 of the nose implant, and the position of the nose implant 200 can be prevented from being displaced during postoperative recovery or after impact. can do.

The scope of the present invention is not limited to the above-described embodiments, but may be implemented in various forms of embodiments within the scope of the appended claims. Anyone with ordinary knowledge in the art to which the invention pertains without departing from the subject matter of the invention claimed in the claims is considered to be within the scope of the claims of the present invention to various extents that can be modified.

Claims (12)

In the nasal implant inserted between the nasal bone, nasal cartilage and nasal skin,
an implant body including an upper portion covering the nasal bone and a lower portion covering the nasal cartilage; and
Includes a vertical guide positioned between the top and bottom of the prosthesis body,
The vertical guide is a nose implant having a groove shape. According to claim 1,
The vertical guide,
A nose prosthesis comprising a side groove concavely inserted into at least one end of the left or right side of the prosthesis body. According to claim 2,
The side groove is
A nose implant characterized in that it has a semicircular curve. According to claim 3,
The semicircular curve is a nose implant, characterized in that it has a diameter of 1 ~ 1.5mm. According to claim 1,
The vertical guide,
A nose implant comprising a rear groove formed at a boundary between a lower portion of the prosthesis body and the prosthesis on the rear surface of the prosthesis body. According to claim 1,
The nose implant further comprises a horizontal guide protruding from the rear surface of the lower part of the implant body, and positioned between lower lateral cartilage divided into both sides of the nasal cartilage. According to claim 1,
The width seen from the front of the nose implant is
The nose prosthesis, characterized in that it becomes narrower as it goes from the upper part of the prosthesis body to the lower part of the prosthesis body. According to claim 1,
The nose implant characterized in that the end of the upper portion of the prosthesis body further comprises a glabellar portion extending in the left and right directions. In the method of manufacturing a nasal implant inserted between the nasal bone, nasal cartilage and nasal skin,
(a) acquiring a 3D image of the nasal bone and a 3D image of the nasal cavity;
(b) modeling the nasal cartilage by applying anatomical information between the nasal bone and the nasal cavity and the nasal cartilage to the 3-dimensional image of the nasal bone and the 3-dimensional image of the nasal cavity;
(c) modeling the inner shape of the implant body including an upper part corresponding to the shape of the 3-dimensional image of the nasal bone and a lower part corresponding to the modeled shape of the nasal cartilage;
(d) modeling the nose implant by modeling the shape of the implant body based on the target nose shape; and
(e) determining a position of a vertical guide positioned between an upper part and a lower part of the prosthesis body. According to claim 9,
The vertical guide
A nose implant manufacturing method comprising a side groove located in a lateral direction of the implant body. According to claim 10,
Determining the position of the vertical guide,
seating the modeled implant body on the 3-dimensional image of the nasal bone;
setting a position where the lower end of the nasal bone and a lateral end of the prosthesis body come into contact with each other as a cutting center point; and
Cutting the side groove with a plate-shaped cutter having a semicircular curved surface at the end,
In the step of cutting the side groove, the center of the semicircular surface of the cutter is positioned at the cutting center point, and the cutting is performed. According to claim 11,
The plate-shaped cutter
The method of manufacturing a nose implant, characterized in that it is disposed vertically at the side end of the prosthesis body in the lateral direction, and disposed in a direction inclined at 45 ° to the center of the prosthesis body in the forward direction.

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