Personalized stepped 3D printing nasal cavity orthopedic nasal cavity support and use method

Abstract

The invention relates to the technical field of nasal reshaping, in particular to a personalized stepped 3D printing nasal cavity support for nasal reshaping and a using method, the personalized stepped 3D printing nasal cavity support comprises a nasal cavity support for supporting a nose wing, the outer surface of the nasal cavity support is fixedly connected with an expansion block, and the two nasal cavity supports are connected through a connecting block 6 to form a complete support. According to the personalized stepped 3D printing nasal cavity orthopedic support and the use method, dynamic fitting is established between the original nasal cavity form and the normal nasal cavity form of a patient, a plurality of supports are printed in the process, the number of the nasal cavity supports is set according to the nasal deformity condition of the patient, and the stepped nasal cavity orthopedic support with the double-side nasal deformity is formed; the nasal cavity stent gradually changes from the original nasal cavity shape to the normal nasal cavity shape, so that the discomfort of a patient wearing the stent can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of nasal deformity correction technology, specifically to a personalized stepped 3D printed nasal orthopedic nasal cavity support and its usage method. Background Technology

[0002] Rhinoplasty can reduce or increase the size of the nose, change the shape of the tip or bridge of the nose, narrow flared nostrils, or alter the triangular area between the nose and upper lip. It can also correct congenital defects or injuries to the nose, such as a hump nose, hooked nose, or deviated nose, and may even help alleviate some breathing problems. After rhinoplasty, a nasal support frame is usually required to support the nostrils.

[0003] Patent application number 202110538019.1 proposes a pneumatic plug for post-nasal reshaping. By inflating with air or liquid, the plug can adapt to the shape of the nasal cavity wall, thereby providing adaptive support to the nasal cavity. Compared with the prior art, it has a wider range of applications, stronger applicability, and better support effect on the nasal cavity. However, when this device is used on deformed noses, the large difference between the deformed nose and the normal nasal cavity may cause great discomfort to the patient after plastic surgery, affecting the patient's normal life.

[0004] Patent application number 202111229120.5 proposes a personalized nasal orthopedic device based on additive manufacturing technology. This device can be stably fixed in the patient's nasal cavity, effectively improving the treatment effect after nasal deformity correction surgery. Furthermore, unlike pre-made nasal orthopedic devices, this device fully considers the patient's individual needs, effectively meeting the patient's aesthetic requirements and achieving high patient satisfaction. In contrast, nasal molds manufactured directly using normal nasal cavity parameters may differ significantly from the patient's deformed nasal cavity, causing severe discomfort when wearing the mold, affecting the patient's normal life and subsequent recovery speed.

[0005] Patent application number 202110465804.9 discloses a 3D-printed perioperative nasal fixation device for cleft lip and nasal deformity and its wearing method. The device utilizes an internal and external nasal mold that work together to clamp and correct the deformity from both inside and outside the nasal cavity, improving the reconstructive effect. Specifically, a limiting component prevents the internal nasal mold from shifting or falling out of the nasal cavity. The method uses two sets of the aforementioned device: one set is worn preoperatively to initially correct the nasal deformity, increasing the success rate of the surgery; the other set is worn postoperatively to further correct the deformity and consolidate the reconstructed nasal shape, comprehensively improving the reconstructive effect. However, the nasal cavity shape may change during postoperative recovery, and wearing only one set of postoperative support may not simultaneously meet the support needs of the patient in the early and later stages of recovery.

[0006] To this end, we propose a personalized, stepped 3D-printed nasal orthopedic nasal support and its usage method. Summary of the Invention

[0007] The purpose of this invention is to provide a personalized, stepped 3D-printed nasal orthopedic nasal cavity support and its usage method, so as to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: A personalized, stepped 3D-printed nasal orthopedic nasal support includes a nasal support 1 for supporting the nasal wings. An expansion block 2 is fixedly connected to the outer surface of the nasal support 1. Two nasal supports 1 are connected by a connecting block 6 to form a complete support. Each nasal support 1 has a ventilation hole 4 that is connected front to back. An external support ring 3 is fixedly connected to the wider end of the ventilation hole 4 on the nasal support 1. The nasal support 1 is installed inside the patient's nasal cavity through the cooperation of the expansion block 2 and the external support ring 3.

[0009] A method for using a personalized, stepped 3D-printed nasal orthopedic support includes the following steps: S1. Measure the parameters inside the patient's nasal cavity using imaging parametric equipment; S2. Based on the patient's original nasal cavity shape, the original nasal cavity support is printed using 3D printing equipment. After fitting, the patient's desired and suitable normal nasal cavity is searched in the database based on the patient's nasal cavity shape. The original nasal cavity shape is dynamically fitted with the normal nasal cavity shape. S3. Based on the dynamic fitting data, multiple nasal cavity stents 1 are printed using 3D printing equipment. The multiple stents form a stepped stent 5, which the patient wears in sequence according to the fitting order. S4. Patients wearing stents need to have a CT scan every six months to assess changes in the nasal cavity morphology.

[0010] A dynamic fitting method includes the following steps: S1. Based on the nasal cavity structure data extracted in claim 2, a numerical model of the nasal cavity is established using the finite element method (FEM). S2. Based on the actual physical properties of the nasal cavity tissue, define appropriate material properties for each element in the model, such as elastic modulus, Poisson's ratio, etc. S3. Set appropriate boundary conditions for the model based on the actual condition of the patient's nasal cavity and the normal nasal cavity shape selected by the patient. S4. By adjusting parameters in the model, such as structural dimensions and material properties, the model can be made to match the normal nasal cavity shape as closely as possible in a static state. S5. Based on static fitting, the model is dynamically simulated using methods such as computational fluid dynamics (CFD). By simulating airflow changes during respiration, the morphological changes of the model at different time points are observed and compared with the dynamic changes of a normal nasal cavity. S6. Based on the results of dynamic simulation, the parameters in the model are further adjusted and optimized so that the model can maintain a high degree of conformity with the normal nasal cavity morphology even in dynamic state. S7. Based on the changes in nasal cavity morphology that patients need to re-examine every six months, the dynamic simulation model is tested and optimized.

[0011] Preferably, the number of stents in the stepped stent 5 is set according to the patient's nasal wing deformity, and each stent is worn by the patient for six to eight weeks.

[0012] Preferably, the support frame is 3D printed in one piece, and the printing material is resin.

[0013] Compared with existing technologies, this invention provides a personalized, stepped 3D-printed nasal orthopedic nasal cavity support and its usage method, which has the following beneficial effects: This personalized, stepped 3D-printed nasal orthopedic support and its usage method involves dynamically fitting the patient's original nasal cavity shape with a normal nasal cavity shape. During the process, several supports are printed, with the number of supports set according to the patient's nasal alar deformity, forming a stepped nasal orthopedic support for bilateral nasal deformities. When the patient wears the support, the nasal cavity shape gradually changes from the original nasal cavity shape to the normal nasal cavity shape, which can effectively reduce the pain of wearing the support. If the patient feels discomfort when changing to the next step support, the number of steps can be increased to reduce the shape difference between adjacent steps support, further improving the patient's comfort. Attached Figure Description

[0014] Figure 1 This is a top view of the nasal cavity support of the present invention; Figure 2 This is a front view of the nasal cavity support of the present invention; Figure 3 This is a schematic diagram of multiple consecutive stepped supports according to the present invention; Figure 4 This is a schematic diagram illustrating the usage process of the present invention.

[0015] In the diagram: 1. Nasal cavity support; 2. Expansion block; 3. External support ring; 4. Air vent; 5. Stepped support; 6. Connecting block. Detailed Implementation

[0016] Please see Figure 1-4A personalized, stepped 3D-printed nasal orthopedic nasal support includes a nasal support 1 for supporting the nasal wings. An expansion block 2 is fixedly connected to the outer surface of the nasal support 1. Two nasal supports 1 are connected by a connecting block 6 to form a complete support. When worn by the patient, it can provide better stability and prevent the support from falling off. Each nasal support 1 has a ventilation hole 4 that is connected front and back. An external support ring 3 is fixedly connected to the wider end of the ventilation hole 4 on the nasal support 1. The nasal support 1 is installed inside the patient's nasal cavity through the cooperation of the expansion block 2 and the external support ring 3.

[0017] A method for using a personalized, stepped 3D-printed nasal orthopedic support includes the following steps: S1. Measure the parameters inside the patient's nasal cavity using imaging parametric equipment; S2. Based on the patient's original nasal cavity shape, the original nasal cavity support is printed using 3D printing equipment. After fitting, the patient's desired and suitable normal nasal cavity is searched in the database based on the patient's nasal cavity shape. The original nasal cavity shape is dynamically fitted with the normal nasal cavity shape. S3. Based on the dynamic fitting data, multiple supports are printed using 3D printing equipment. The multiple supports form a stepped support 5, which the patient wears sequentially according to the fitting order. S4. Patients wearing stents need to have a CT scan every six months to assess changes in the nasal cavity morphology.

[0018] A dynamic fitting method includes the following steps: S1. Based on the nasal cavity structure data extracted in claim 2, a numerical model of the nasal cavity is established using the finite element method (FEM). S2. Based on the actual physical properties of the nasal cavity tissue, define appropriate material properties for each element in the model, such as elastic modulus, Poisson's ratio, etc. S3. Set appropriate boundary conditions for the model based on the actual condition of the patient's nasal cavity and the normal nasal cavity shape selected by the patient. S4. By adjusting parameters in the model, such as structural dimensions and material properties, the model can be made to match the normal nasal cavity shape as closely as possible in a static state. S5. Based on static fitting, the model is dynamically simulated using methods such as computational fluid dynamics (CFD). By simulating airflow changes during respiration, the morphological changes of the model at different time points are observed and compared with the dynamic changes of a normal nasal cavity. S6. Based on the results of dynamic simulation, the parameters in the model are further adjusted and optimized so that the model can maintain a high degree of conformity with the normal nasal cavity morphology even in dynamic state. S7. Based on the changes in nasal cavity morphology that patients need to re-examine every six months, the dynamic simulation model is tested and optimized.

[0019] Furthermore, the number of stents in the stepped stent 5 is set according to the patient's nasal ala deformity, and each stent is worn by the patient for six to eight weeks.

[0020] Furthermore, the support structure is 3D printed in one piece, and the printing material is resin, which has good biocompatibility. Example

[0021] For patients with unilateral nasal deformity.

[0022] First, a CT scan is performed to obtain the patient's maxillofacial CT data. A three-dimensional model of the patient's facial soft tissue is then reconstructed. Based on the model data, the original nasal cavity support is printed and the patient is allowed to wear it for a week to adapt. If the patient still feels that they cannot adapt to the nasal cavity support after wearing it for a week, the wearing time can be appropriately extended. Then, the healthy nasal cavity is mirrored to the affected side as the endpoint of the affected side. Then, a dynamic fit is established between the original affected nasal cavity and the endpoint of the affected side. During the process, several scaffolds are printed. The scaffolds are made of resin and have good biocompatibility. The number of nasal scaffolds 1 is set according to the patient's nasal wing deformity. Usually, 6 are printed to form a unilateral nasal deformity step-type nasal correction scaffold. Each nasal stent is worn for six to eight weeks. If the patient experiences discomfort when changing to the next stent, the number of stents can be increased, and the shape difference between adjacent stents can be reduced to improve the patient's comfort. While the patient is wearing the stent, a CT scan is required every six months to assess changes in the nasal cavity morphology. Example

[0023] For patients with bilateral nasal deformities.

[0024] First, a CT scan is performed to obtain the patient's maxillofacial CT data. A three-dimensional model of the patient's facial soft tissue is then reconstructed. Based on the model data, the original nasal cavity support is printed and the patient is allowed to wear it for a week to adapt. If the patient still feels that they cannot adapt to the nasal cavity support after wearing it for a week, the wearing time can be appropriately extended. Then, based on the patient's nasal cavity morphology, a suitable normal nasal cavity is matched in the database. The original nasal cavity morphology is dynamically fitted with the normal nasal cavity morphology. During the process, several scaffolds are printed. The scaffolds are made of resin and have good biocompatibility. The number of nasal cavity scaffolds 1 is set according to the patient's nasal wing deformity. Usually, 6 are printed to form a stepped nasal orthopedic scaffold for bilateral nasal deformity. Each nasal stent is worn for six to eight weeks. If the patient experiences discomfort when changing to the next stent, the number of stents can be increased, and the shape difference between adjacent stents can be reduced to improve the patient's comfort. While the patient is wearing the stent, a CT scan is required every six months to assess changes in the nasal cavity morphology. Example

[0025] For patients who are otherwise healthy.

[0026] First, a CT scan is performed to obtain the patient's maxillofacial CT data. A three-dimensional model of the patient's facial soft tissue is then reconstructed. Based on the model data, the original nasal cavity support is printed and the patient is allowed to wear it for a week to adapt. If the patient still feels that they cannot adapt to the nasal cavity support after wearing it for a week, the wearing time can be appropriately extended. Then, based on the patient's nasal cavity morphology, the database is searched for the patient's desired and suitable normal nasal cavity. The original nasal cavity morphology is dynamically fitted with the normal nasal cavity morphology. During the process, several scaffolds are printed. The scaffolds are made of resin and have good biocompatibility. The number of nasal scaffolds 1 is set according to the patient's nasal wing deformity. Usually, 6 are printed to form a bilateral stepped nasal orthopedic scaffold for normal patients. Each nasal stent is worn for six to eight weeks. If the patient experiences discomfort when changing to the next stent, the number of stents can be increased, and the shape difference between adjacent stents can be reduced to improve the patient's comfort. While the patient is wearing the stent, a CT scan is required every six months to assess changes in the nasal cavity morphology.

Claims

1. A personalized, stepped 3D-printed nasal orthopedic support, characterized in that: It includes two nasal supports (1) for supporting the nasal wings. The two nasal supports (1) are connected by a connecting block (6) to form a complete support. An expansion block (2) is fixedly connected to the outer surface of the nasal support (1). The nasal supports (1) are provided with ventilation holes (4) that are connected front and back. An external support ring (3) is fixedly connected to the wider end of the ventilation hole (4) on the nasal support (1). The nasal support (1) is installed inside the patient's nasal cavity through the cooperation of the expansion block (2) and the external support ring (3).

2. The method of using the personalized stepped 3D printed nasal orthopedic nasal cavity support according to claim 1, characterized in that, Includes the following steps: S1. Measure the parameters inside the patient's nasal cavity using imaging parametric equipment; S2. Based on the patient's original nasal cavity shape, the original nasal cavity support is printed using 3D printing equipment. After fitting, the patient's desired and suitable normal nasal cavity is searched in the database based on the patient's nasal cavity shape. The original nasal cavity shape is dynamically fitted with the normal nasal cavity shape. S3. Based on the dynamic fitting data, multiple supports are printed using 3D printing equipment. The multiple supports form a stepped support (5), and the patient wears them in sequence according to the fitting order. S4. Patients wearing stents need to have a CT scan every six months to assess changes in the nasal cavity morphology.

3. The dynamic fitting method according to claim 2, characterized in that, Includes the following steps: S1. Based on the nasal cavity structure data extracted in claim 2, a numerical model of the nasal cavity is established using the finite element method (FEM). S2. Based on the actual physical properties of the nasal cavity tissue, define appropriate material properties for each element in the model, such as elastic modulus, Poisson's ratio, etc. S3. Set appropriate boundary conditions for the model based on the actual condition of the patient's nasal cavity and the normal nasal cavity shape selected by the patient. S4. By adjusting the parameters in the model (such as structural dimensions, material properties, etc.), the model can be made to match the normal nasal cavity shape as closely as possible in a static state. S5. Based on static fitting, the model is dynamically simulated using methods such as computational fluid dynamics (CFD). By simulating the airflow changes during the breathing process, the morphological changes of the model at different time points are observed and compared with the dynamic changes of a normal nasal cavity. S6. Based on the results of dynamic simulation, the parameters in the model are further adjusted and optimized so that the model can maintain a high degree of conformity with the normal nasal cavity morphology even in dynamic state. S7. Based on the changes in nasal cavity morphology that patients need to re-examine every six months, the dynamic simulation model is tested and optimized.

4. The personalized stepped 3D printed nasal orthopedic nasal cavity support according to claim 2, characterized in that: The number of stents in the stepped stent (5) is set according to the patient's nasal wing deformity, and each stent is worn by the patient for six to eight weeks.

5. The personalized stepped 3D printed nasal orthopedic nasal cavity support according to claim 1, characterized in that: The bracket is 3D printed in one piece, and the printing material is resin.

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