A filling prosthesis and a prosthesis model arranged in front and above the nasal ridge

Abstract

A filling prosthesis and a prosthesis model arranged at the front and upper part of the nasal ridge are used to correct the depression of the base of the columella, increase the upper lip angle of the columella, and increase the nose threshold. Both of them include a tetrahedron structure, which includes a bottom surface, a front side surface, and two left and right side surfaces; wherein the fixed bottom surface is arranged above the nasal ridge, and the front side surface is in contact with the columella; the two left and right side surfaces are support surfaces for supporting the skin above the nasal ridge and between the columella to increase the upper lip angle of the columella and correct the depression of the base of the columella; the two left and right side surfaces are equal-sized surfaces, and both of the left and right side surfaces extend into two equal-sized arc-shaped surfaces 1; and the space between the two arc-shaped surfaces is connected by a smooth arc-shaped surface 2; all edges of the fixed bottom surface and the front side surface of the tetrahedron structure are arc-shaped structures with rounded corners; a curved surface depression 1 similar to the shape of the nasal ridge is arranged on the fixed bottom surface, and a curved surface depression 2 similar to the shape of the columella is arranged on the front side surface; the curved surface depression 1 and the curved surface depression 2 are smooth depression structures.

Description

Technical Field

[0001] The invention belongs to the technical field of implant prostheses for plastic surgery, and in particular relates to a filling prosthesis and a prosthesis model arranged in front of a nasal ridge. Background Art

[0002] With the rapid development of rhinoplasty and cosmetic surgery, more and more people are undergoing nose surgery to achieve overall facial plastic surgery. At present, one of the characteristics of Chinese people's face shape is the depression of the middle face and the protrusion of the upper lip, with the depression of the entire nose tip base as the most prominent morphological feature (the base of the nasal wings and the base of the columella on both sides). At present, the plastic surgery market uses a large number of nasal wing base filling prosthesis products to solve the problem of mid-face depression. However, the prosthetic filling of the nose wing is not enough to correct the overall depression of the nose tip base.

[0003] Although there are doctors who currently fill the nasal ridge with structures to solve plastic surgery problems, the filling structures are all carved by the surgeons themselves. Most doctors lack experience and are unable to make appropriate prostheses, resulting in long operations and poor post-operative results. In addition, due to the high requirements for surgeons, there are very few doctors who can complete such operations, which increases the difficulty of such plastic surgery and makes it difficult to promote it in the market.

[0004] If there are standardized prostheses or prosthesis models for the above-mentioned plastic surgery areas, the doctor can place the prosthesis model into the surgical area for trial molding, and then select a standard model of prosthesis for filling. This will greatly reduce the difficulty of filling surgery above the nasal ridge and facilitate rapid promotion in plastic surgery hospitals.

[0005] Aiming at the problem that there is no ready-made prosthesis for filling the front of the nasal ridge in the prior art, temporary preparation during surgery is difficult, which is not conducive to the promotion of such plastic surgery, the present invention provides a filling prosthesis and a prosthesis model arranged in the front and upper part of the nasal ridge. Summary of the invention

[0006] A filling prosthesis arranged in the front and upper part of the nasal ridge, comprising a tetrahedron structure, characterized in that the tetrahedron structure comprises a fixed bottom surface, a front surface and two left and right side surfaces; wherein the fixed bottom surface is arranged in front of the nasal ridge, and the front surface contacts the upper lip and the columella; the two left and right side surfaces are supporting surfaces for propping up the skin in front of the nasal ridge and between the columella to increase the upper lip angle of the columella and correct the depression of the base of the columella; the two left and right side surfaces are equal-sized curved surfaces, and the two left and right side surfaces are extended into two equal-sized arcuate surfaces 1; and the two arcuate surfaces 1 are connected by a smooth arcuate surface 2, and the arrangement result of the arcuate surface 1 and the arcuate surface 2 is to form an enlarged nose threshold shape; the fixed bottom surface and all the edges of the front surface of the tetrahedron structure are arcuate structures with rounded corners; an inlaid curved surface depression 1 similar to the shape of the nasal ridge is arranged on the fixed bottom surface, and a curved surface depression 2 similar to the shape of the columella is arranged on the front surface; the curved surface depression 1 and the curved surface depression 2 are smooth depression structures. This arrangement can effectively implant the prosthesis in front of the nasal ridge in an inlaid manner, and effectively support the skin between the nasal ridge and the columella. The support of the front of the overall tetrahedron structure can effectively correct the depression of the columella base; the combination of the front and two side surfaces of the overall tetrahedron can effectively correct the shape of the upper lip protrusion and improve the situation of the upper lip angle of the columella; the two arc-shaped surfaces can effectively raise the nose threshold to effectively increase the nose threshold; the shape of the nose can be greatly improved to adjust the beauty of the entire face, and because the prosthesis is a formed prosthesis, the operation is simple.

[0007] Furthermore, the prosthesis is a personalized prosthesis set according to the patient's condition;

[0008] Furthermore, according to the conditions of the human nose and face, 4-5 different sizes of prosthesis models are set;

[0009] Furthermore, the prosthesis in use is a prosthesis that is trimmed according to the specific conditions of the patient after the prosthesis model is selected. When in use, the most suitable model is selected according to the nose shape of the plastic surgery patient, and the prosthesis is trimmed based on the selected model. The trimming will be simple and convenient because of the shape of the original prosthesis model. In addition, choosing the closest prosthesis model can effectively reduce the trimming time.

[0010] Furthermore, the tetrahedron structure is a solid structure as a whole, and the material can be any prosthetic material that can be implanted into the human body. The solid setting ensures the overall stability of the structure during trimming.

[0011] Furthermore, the front is a semiconical shape of an isosceles triangle, the ventral bottom is a horseshoe shape with grooves, and the symmetry plane of the tetrahedron is triangle ABC; the perpendicular line segment from vertex A to line segment BC is a; the length of a is not more than one-third of the length of the columella; the perpendicular line segment from vertex C to perpendicular line segment a is c; the length of c is not more than one-third of the distance from the bottom of the nose to the edge of the upper lip; the length of AB is greater than BC; ∠ABC is ∠D; the range of ∠D is 90-110°; vertex A is the point above the intersection line of the two arcuate surfaces, vertex C is the point below the intersection line of the two arcuate surfaces, and vertex B is the intersection of the midline of the anterior side surface and the midline of the ventral bottom surface; this length setting can meet the plastic surgery needs of different patients; the angle setting meets the requirements of the angle between the columella and the upper lip.

[0012] Furthermore, the line segment of the bottom edge of the bottom surface is b; the length of b is not greater than one quarter of the distance between the nose wings on both sides.

[0013] Further, the prosthesis models are set to be successively larger from 1 to 4;

[0014] Furthermore, for prosthesis model No. 1: the length range of a is 6.1±2 mm; the length range of b is 7.7±2.5 mm; the length range of c is 12.3±4 mm;

[0015] Furthermore, for prosthesis model No. 2: the length range of a is 8.1±2 mm; the length range of b is 10.2±2.5 mm; the length range of c is 16.5±4 mm;

[0016] Furthermore, for prosthesis model No. 3: the length range of a is 10.1±2 mm; the length range of b is 12.8±2.5 mm; the length range of c is 20.6±4 mm;

[0017] Furthermore, for prosthesis model No. 4: the length range of a is 12.1±2 mm; the length range of b is 15.2±2.5 mm; the length range of c is 24.6±4 mm;

[0018] Alternatively, the prosthesis is a 3D-printed prosthesis; the prosthesis obtains the length data from the base of the nose to the upper lip, the length data of the distance between the two sides of the nose wings, the length data of the columella, and the data of the columella-upper lip angle, and takes one-third of the length data from the base of the nose to the upper lip and the length data of the columella, and one-quarter of the length data of the distance between the two sides of the nose wings; further, the size of ∠D is obtained within the angle range of ±10° according to the size of the columella-upper lip angle, and the columella base (including the above-mentioned area) is further pulled forward on the three-dimensional graphics processing software so that the columella-upper lip angle is 90 degrees ±10° and the nose sill width is equal to or close to one-quarter of the nose wing length, and the difference between this design drawing and the original drawing is intercepted as the initial model of the prosthesis, and then the prosthesis shape and data are determined according to the anatomy of the maxillary nasal ridge, and the prosthesis is 3D printed according to the prosthesis data.

[0019] Furthermore, the present invention also discloses a prosthesis model which has the same shape as the above-mentioned prosthesis but is made of different materials.

[0020] Furthermore, prosthesis models No. 1-5 are set, wherein the shape and size of the prosthesis model No. 1-4 are the same as those of the prosthesis No. 1-4.

[0021] Furthermore, the length range of prosthesis model No. 5: a is 37±2mm; the length range of b is 44.9±2.5mm; the length range of c is 46.3±4mm; the purpose of setting up prosthesis model No. 5 is to allow patients to intuitively understand the specific shape of the prosthesis and facilitate explanation based on the model.

[0022] Furthermore, the length range of the prosthesis model No. 5 is: a is 37 mm; b is 44.9 mm; c is 46.3 mm;

[0023] Furthermore, the present invention also discloses a method for constructing a prosthesis and a prosthesis model.

[0024] 1. Randomly select more than 200 adults, and use three-dimensional surface imaging technology to obtain the length data from the nose base to the upper lip, the length data on both sides of the nose, and the length data of the columella of each person; and divide each parameter into 4 intervals according to the maximum and minimum data. The length of each parameter is taken in proportion to the length range of the prosthesis or prosthesis model. The average value of each interval is the optimal length selection for the prosthesis or prosthesis model.

[0025] 2. Analyze and obtain the upper lip and columella angle of each person, take the average value, and set the D angle within the floating range of ±10°.

[0026] Furthermore, the length data from the nose base to the upper lip and the length data of the columella are taken as one-third, and the length data of the distance between the nose wings on both sides are taken as one-quarter; and these are matched with the length range of the prosthesis or prosthesis model.

[0027] Furthermore, the present invention also discloses a method for selecting a prosthesis and a prosthesis model:

[0028] 1. Before the surgery, obtain the angle of the upper lip angle of the columella, the length from the nose base to the upper lip, the length of both sides of the nose, and the length of the columella;

[0029] 2. According to the interval into which the data value falls, select the prosthesis and prosthesis model corresponding to the corresponding interval.

[0030] The present invention sets an implant prosthesis in front of the anterior nasal ridge of the maxillary bone (abbreviated as: nasal ridge) according to the morphological characteristics of the concave face of the Chinese people; the concave base of the columella is effectively corrected by the support in front of the overall tetrahedron structure; the morphology of the protrusion of the upper lip is effectively corrected by the combination of the front and two side surfaces of the overall tetrahedron, and the situation of the upper lip angle of the columella is improved; the nose threshold can be well raised by setting two arc-shaped surfaces to achieve the effect of effectively increasing the nose threshold; in addition, the prosthesis of the present invention is small in size, can be placed in a specific way, and the opening size is fixed, which provides an effective means for correcting the concave middle part of the face and the protrusion of the upper lip by using minimally invasive surgery. Compared with the problem that it is very difficult to carve the prosthesis before or during the operation of the prior art surgery, which requires high doctor experience, the technical solution of the present invention can quickly obtain an effective prosthesis after simply obtaining a few data, and use the prosthesis model to test the state of the prosthesis after placement, and trim the prosthesis according to the placement state, which is simple and convenient to trim and requires low doctor experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the structure of the present invention from the upper side;

[0032] Figure 2 It is a schematic diagram of the structure of the right side view of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the present invention from the bottom and side;

[0034] Figure 4 It is a schematic diagram of the symmetry surface structure of the present invention and a schematic diagram of the corresponding line segment and angle marking structure;

[0035] Figure 5 It is a front view structural schematic diagram of the present invention and a corresponding line segment marked structural schematic diagram;

[0036] In the figure, 1, bottom surface; 2, front surface; 3, left and right side surfaces; 4, curved surface one; 5, curved surface two; 6-1, curved surface depression one; 6-2, curved surface depression two; 7, symmetry surface. DETAILED DESCRIPTION

[0037] Example 1 A filling prosthesis arranged in front and above the nasal ridge

[0038] A filling prosthesis arranged in front and above the nasal ridge comprises a tetrahedral structure, wherein the tetrahedral structure comprises a bottom surface 1, a front surface 2 and two left and right side surfaces 3; wherein the fixed bottom surface 1 is arranged in front of the nasal ridge, and the front surface 2 contacts the upper lip and the columella; the two left and right side surfaces 3 are supporting surfaces for supporting the skin in front of the nasal ridge and between the columella to increase the upper lip angle of the columella and correct the concavity of the columella base; the two left and right side surfaces 3 are equal-sized curved surfaces, and the two left and right side surfaces 3 are extended to become two equal-sized arc-shaped surfaces 1-4; and the two arcuate surfaces 1-4 are connected by a smooth arcuate surface 2-5, and the arrangement of the arcuate surface 1-4 and the arcuate surface 2-5 results in the formation of an enlarged nose sill shape; the fixed bottom surface 1 and all the edges of the front surface 2 of the tetrahedron structure are arcuate structures after rounding; an inlaid curved surface depression 1-6-1 similar to the shape of the nasal ridge is arranged on the fixed bottom surface 1, and a curved surface depression 2-6-2 similar to the shape of the columella is arranged on the front surface 2; the curved surface depression 1-6-1 and the curved surface depression 2-6-2 are smooth concave structures. Through this arrangement, the prosthesis can be effectively implanted in front of the nasal ridge in an inlaid manner, and the skin between the nasal ridge and the columella can be effectively supported, and because the prosthesis is a formed prosthesis, the surgical operation is simple. The filling prosthesis is a solid structure as a whole, and the material can be any prosthetic material that can be implanted into the human body. The solid setting ensures the overall stability of the structure during trimming.

[0039] The front face 2 and the bottom face 1 are both isosceles triangles, and the triangle of the symmetry face 7 of the tetrahedron is triangle ABC; the perpendicular line segment from vertex A to line segment BC is a; the length of a is not less than one-third of the columella; the perpendicular line segment from vertex C to perpendicular line segment a is c; the length of c is not less than one-third of the distance from the nose base to the upper lip edge; ∠ABC is ∠D; the range of ∠D is 90-110 degrees; vertex A is the point above the intersection line of the two arc-shaped faces 14, vertex C is the point below the intersection line of the two arc-shaped faces 14, and vertex B is the intersection of the midline of the front side and the midline of the bottom face 1 on the ventral side; this length setting can meet the plastic surgery needs of different patients; the angle setting meets the requirements of the angle between the columella and the upper lip. The line segment of the bottom edge of the bottom face 1 is b; the length of b is not more than one-quarter of the distance between the two sides of the nose.

[0040] According to the human nose and face conditions, 4-5 different sizes of prosthesis models are set. The prosthesis used is the one that has been trimmed after the selected prosthesis model. When using it, the most suitable model is selected according to the nose shape of the plastic surgeon. The prosthesis is trimmed based on the selected model. It will be simple and convenient to trim the original shape. In addition, choosing the closest prosthesis model can effectively reduce the trimming time.

[0041] Set the size of the prosthesis from 1 to 4, which increases in size in sequence;

[0042] Prosthesis model No. 1: the length of a is 6.1mm; the length of b is 7.7mm; the length of c is 12.3mm;

[0043] Prosthesis model No. 2: the length of a is 8.1mm; the length of b is 10.2mm; the length of c is 16.5mm;

[0044] Prosthesis model No. 3: the length of a is 10.1mm; the length of b is 12.8mm; the length of c is 20.6mm;

[0045] Prosthesis model No. 4: the length of a is 12.1mm; the length of b is 15.2mm; the length of c is 24.6mm;

[0046] Example 2 A 3D printed filling prosthesis arranged above the nasal ridge

[0047] A filling prosthesis arranged in front and above the nasal ridge comprises a tetrahedral structure, wherein the tetrahedral structure comprises a bottom surface 1, a front surface 2 and two left and right side surfaces 3; wherein the fixed bottom surface 1 is arranged in front of the nasal ridge, and the front surface 2 contacts the upper lip and the columella; the two left and right side surfaces 3 are supporting surfaces for supporting the skin in front of the nasal ridge and between the columella to increase the upper lip angle of the columella and correct the concavity of the columella base; the two left and right side surfaces 3 are equal-sized curved surfaces, and the two left and right side surfaces 3 are extended to become two equal-sized arc-shaped surfaces 1-4; and the two arcuate surfaces 1-4 are connected by a smooth arcuate surface 2-5, and the arrangement of the arcuate surface 1-4 and the arcuate surface 2-5 results in the formation of an enlarged nose sill shape; the fixed bottom surface 1 and all the edges of the front surface 2 of the tetrahedron structure are arcuate structures after rounding; an inlaid curved surface depression 1-6-1 similar to the shape of the nasal ridge is arranged on the fixed bottom surface 1, and a curved surface depression 2-6-2 similar to the shape of the columella is arranged on the front surface 2; the curved surface depression 1-6-1 and the curved surface depression 2-6-2 are smooth concave structures. Through this arrangement, the prosthesis can be effectively implanted in front of the nasal ridge in an inlaid manner, and the skin between the nasal ridge and the columella can be effectively supported, and because the prosthesis is a formed prosthesis, the surgical operation is simple. The filling prosthesis is a solid structure as a whole, and the material can be any prosthetic material that can be implanted into the human body. The solid setting ensures the overall stability of the structure during trimming.

[0048] The front face 2 and the bottom face 1 are both isosceles triangles, and the triangle of the symmetry face 7 of the tetrahedron is triangle ABC; the perpendicular line segment from vertex A to line segment BC is a; the length of a is not less than one-third of the columella; the perpendicular line segment from vertex C to perpendicular line segment a is c; the length of c is not less than one-third of the distance from the nose base to the upper lip edge; ∠ABC is ∠D; the range of ∠D is 90-110 degrees; vertex A is the point above the intersection line of the two arc-shaped faces 14, vertex C is the point below the intersection line of the two arc-shaped faces 14, and vertex B is the intersection of the midline of the front side and the midline of the bottom face 1 on the ventral side; this length setting can meet the plastic surgery needs of different patients; the angle setting meets the requirements of the angle between the columella and the upper lip. The line segment of the bottom edge of the bottom face 1 is b; the length of b is not more than one-quarter of the distance between the two sides of the nose.

[0049] The prosthesis is a 3D printed prosthesis; the prosthesis is to obtain the length data from the nose base to the upper lip, the length data of the distance between the two sides of the nose wings, the length data of the columella, and the data of the columella upper lip angle, and take one-third of the length data from the nose base to the upper lip and the length data of the columella, and one-quarter of the length data of the distance between the two sides of the nose wings; according to the size of the columella upper lip angle within the range of ±10°, the size of the columella base (including the above-mentioned area) is further pulled forward on the three-dimensional graphics processing software, so that the columella upper lip angle is 90 degrees ±10°, and the nose sill width is equal to or close to one-quarter of the nose wing length. The difference between this design drawing and the original drawing is intercepted as the initial model of the prosthesis, and then the prosthesis shape and data are determined according to the anatomy of the maxillary nasal ridge, and the prosthesis is 3D printed according to the prosthesis data.

[0050] Example 3 A filling prosthesis and prosthesis model arranged in front of and above the nasal ridge

[0051] The invention also discloses a prosthesis model which has the same shape as the prosthesis but is made of different materials.

[0052] Set the prosthesis models No. 1-5. The prosthesis model No. 1: the length of a is 6.1mm; the length of b is 7.7mm; the length of c is 12.3mm;

[0053] Prosthesis model No. 2: the length of a is 8.1mm; the length of b is 10.2mm; the length of c is 16.5mm;

[0054] Prosthesis model No. 3: the length of a is 10.1mm; the length of b is 12.8mm; the length of c is 20.6mm;

[0055] Prosthesis model No. 4: the length of a is 12.1mm; the length of b is 15.2mm; the length of c is 24.6mm;

[0056] Prosthesis model No. 5: the length range of a is 37mm; the length range of b is 44.9mm; the length range of c is 46.3mm; the purpose of setting up the prosthesis model No. 5 is to allow patients to intuitively understand the specific shape of the prosthesis and facilitate explanation based on the model.

[0057] Prosthesis model No. 5: the length range of a is 37mm; the length range of b is 44.9mm; the length range of c is 46.3mm.

[0058] Example 4 A filling prosthesis arranged in front and above the nasal ridge and a method for constructing a prosthesis model

[0059] The present invention also discloses a prosthesis and a method for constructing a prosthesis model.

[0060] 300 adults were randomly selected, and the three-dimensional surface imaging technology was used to obtain the length data from the base of the nose to the upper lip, the length data on both sides of the nose, and the length data of the columella of each person; and each parameter was divided into 4 intervals according to the maximum and minimum data. The length of each parameter was taken in corresponding proportion and corresponded to the length range of the prosthesis or prosthesis model. The average value of each interval was the optimal length selection for the prosthesis or prosthesis model.

[0061] Analyze and obtain the angle between the upper lip and columella of each person, take the average value, and set the D angle within the floating range of ±10°. Take the length data from the nose base to the upper lip and the length data of the columella, which is exactly one-third, and the length data of the distance between the two sides of the nose, which is one-quarter; correspond to the length range of the prosthesis or prosthesis model.

[0062] Example 5: A method for selecting a model of a filling prosthesis arranged in the front and upper part of the nasal ridge

[0063] The present invention also discloses a method for selecting a prosthesis and a prosthesis model: before the operation, the angle of the upper lip angle of the columella of the plastic surgeon, the length data from the nose base to the upper lip, the length data of the two sides of the nose wing, and the length data of the columella are obtained; according to the interval into which the data values ​​fall, the prosthesis and the prosthesis model corresponding to the corresponding interval are selected.

[0064] Alternatively, by testing the prosthesis models one by one, the most suitable prosthesis can be selected based on the doctor's experience. After the prosthesis model is selected, a prosthesis suitable for the patient can be quickly obtained through simple processing. After the processing is completed, the prosthesis is inlaid above the nasal ridge through the inlaid curved surface depression 6-1 of the bottom surface 1 to achieve effective fixation and filling effects.

[0065] The above embodiments are only used to understand the present invention. It should be noted that, for those skilled in the art, several improvements can be made to the present invention without departing from the principles of the present invention, and these improvements will also fall within the scope of protection of the claims of the present invention.

Claims

1. A filling prosthesis arranged in front and above the nasal ridge, comprising a tetrahedral structure, characterized in that: The tetrahedron structure includes a bottom surface, a front surface and two left and right side surfaces; the fixed bottom surface is arranged above and in front of the nasal ridge, and the front surface contacts the upper lip and the columella; the two left and right side surfaces are supporting surfaces for propping up the skin in front of the nasal ridge and between the columella to increase the upper lip angle of the columella and correct the depression of the columella base; the two left and right side surfaces are equal-sized curved surfaces, and the two left and right side surfaces are extended to become two equal-sized arc-shaped surfaces 1; and the two arc-shaped surfaces 1 are connected by a smooth arc-shaped surface 2, and the arrangement result of the arc-shaped surface 1 and the arc-shaped surface 2 is to form an enlarged nose threshold shape; the four surfaces The fixed bottom surface of the body structure and all the front edges are arc-shaped structures with rounded corners; an inlaid curved depression 1 similar to the shape of the nasal ridge is set on the fixed bottom surface, and a curved depression 2 similar to the shape of the columella is set on the front surface; the curved depression 1 and the curved depression 2 are smooth concave structures; the front is an isosceles triangle-like semicone, the ventral bottom surface is a horseshoe-like shape with grooves, and the symmetrical side of the tetrahedron is a triangle ABC; the perpendicular line segment from vertex A to line segment BC is a; the length of a is not greater than one-third of the length of the columella; the perpendicular line segment from vertex C to perpendicular line segment a is c; the length of c is not greater than one-third of the distance from the base of the nose to the edge of the upper lip; the length of AB is greater than BC; ∠ABC is ∠D; the range of ∠D is 90-110 degrees.

2. The filling prosthesis arranged in the front and upper part of the nasal ridge according to claim 1, characterized in that: According to the conditions of the human nose and face, 4-5 different sizes of prosthesis models are set.

3. The filling prosthesis arranged in front and above the nasal ridge according to claim 2, characterized in that: The prosthesis used is the one that has been trimmed after the prosthesis model has been selected.

4. The filling prosthesis arranged in the front and upper part of the nasal ridge according to claim 1, characterized in that: The line segment of the bottom edge of the bottom surface is b; the length of b is not greater than one quarter of the distance between the nose wings on both sides.

5. The filling prosthesis arranged in the front and upper part of the nasal ridge according to claim 1, characterized in that: The prosthesis is a 3D printed prosthesis.

6. The filling prosthesis arranged in the front and upper part of the nasal ridge according to claim 5, characterized in that: The prosthesis is to obtain the length data from the base of the nose to the upper lip, the length data of the distance between the two sides of the nose wings, the length data of the columella, and the data of the columella-upper lip angle, and take one-third of the length data from the base of the nose to the upper lip and the length data of the columella, and one-quarter of the length data of the distance between the two sides of the nose wings; according to the size of the columella-upper lip angle, the size of ∠D is obtained within the angle range of ±10°, and the columella base is pulled forward on the three-dimensional graphics processing software to make the columella-upper lip angle at 90 degrees ±10° and the nose threshold width equal to or close to one-quarter of the nose wing length; and the difference between the design drawing and the original drawing is intercepted as the initial model of the prosthesis, and then the prosthesis shape and data are determined according to the anatomy of the maxillary nasal ridge, and the prosthesis is 3D printed according to the prosthesis data.

7. A prosthesis model, characterized in that: The prosthesis model has the same shape as the prosthesis described in any one of claims 1 to 6 but is made of different materials.

8. A method for prosthesis construction, characterized in that: The prosthesis is the prosthesis according to any one of claims 1 to 6, and the specific steps are: 1) Randomly select more than 200 adults, and use three-dimensional surface imaging technology to obtain the length data from the nose base to the upper lip, the length data on both sides of the nose wing, and the length data of the columella of each person; and divide each parameter into 4 intervals according to the maximum and minimum data. The length of each parameter is taken in proportion to the length range of the prosthesis or prosthesis model, and the average value of each interval is the optimal length selection of the prosthesis or prosthesis model; 2). Analyze and obtain the upper lip and columella angle of each person, take the average value, and set the D angle within the floating range of ±10°.

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