A method for manufacturing a contracted nasal implant prosthesis

Abstract

The present invention relates to a method for manufacturing a contracted nasal implant prosthesis, comprising: obtaining three-dimensional imaging data of the nose of a cosmetic doctor and adjusting it to obtain a nasal 3D model; constructing an implant prosthesis according to the nasal 3D model to obtain a preliminary implant prosthesis model; placing the preliminary implant prosthesis model into the nasal 3D model for simulation matching, and then further modifying and optimizing it according to the matching result to obtain a personalized prosthesis model; and preparing a personalized prosthesis according to the personalized prosthesis model. The technical solution of the present invention accurately measures the three-dimensional data of the nose, reduces the influence of human factors on the miscalculation of prosthesis manufacturing, and can intuitively and accurately simulate the surgical effect before surgery, which is conducive to cosmetic doctors and doctors to evaluate the appearance of the nose, meet the requirements of different cosmetic doctors for the appearance of the nose, realize the personalized needs of rhinoplasty, and reduce medical disputes after surgery.

Description

Technical Field

[0001] The invention relates to the technical field of plastic surgery, in particular to a method for manufacturing a contracted nasal implant prosthesis. Background Art

[0002] In recent years, with the large-scale development of rhinoplasty, related complications have also increased. Among these complications, contracture nasal deformity has the greatest impact on patients. Contracture nasal deformity refers to various reasons after rhinoplasty, such as infection, prosthesis perforation, nasal stent structure damage, etc., which cause scar tissue or capsule tissue to shrink and lead to changes in the internal and external appearance of the nose. The pathogenesis of contracture nasal deformity is not yet fully understood. Current studies believe that it is related to multiple factors such as immune rejection, subclinical infection, repeated trauma and fibrosis caused by hematoma, excessive cartilage resection, micro-movement of the prosthesis, and mechanical pressure. The common causes of contracted nose deformity are: 1. Inflammatory reaction caused by infection after rhinoplasty, which causes local scar hyperplasia and leads to nasal contracture, which often occurs after polytetrafluoroethylene prosthesis implantation; 2. Capsular contracture formed around allogeneic grafts, which is common after silicone prosthesis implantation. Capsular contracture shortens the nose and increases the rotation of the nose tip; 3. Excessive removal of nasal septum tissue during rhinoplasty, resulting in loss of nasal support structure. Infection during rhinoplasty leads to cartilage absorption or excessive tension leading to pressure necrosis. Its common clinical manifestations include appearance deformities such as short nose deformity, nose tip deformity, nostril morphology deformity or asymmetry, columella deviation, changes in nasal skin color and morphology, and functional problems such as ventilation disorders; seriously affecting the patient's appearance and may cause great physical and mental harm. Summary of the invention

[0003] The purpose of the present invention is to provide a method for manufacturing a contracted nasal implant prosthesis, which quantitatively evaluates the degree of nasal contracture, the elasticity and traction ductility of the nasal skin texture, the degree of cartilage damage and loss, and the deformity changes of the nasal appearance such as the nostrils and nose wings, and manufactures a personalized nasal implant prosthesis to improve the accuracy of nasal contracture repair.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for manufacturing a contracted nasal implant prosthesis, comprising:

[0006] The three-dimensional imaging data of the nose of the cosmetic patient is obtained by CT, MRI, PET, ultrasound or three-dimensional scanning and adjusted to obtain a 3D nose model, and then the data information of the three-dimensional structure of the nose skin surface and subsurface of the cosmetic patient is obtained by OCT scanning;

[0007] constructing an implant prosthesis according to the nose 3D model to obtain a preliminary implant prosthesis model;

[0008] Placing the preliminary implant prosthesis model into the nose 3D model for simulation matching, and then further modifying and optimizing according to the matching result to obtain a personalized prosthesis model;

[0009] Preparing a personalized prosthesis according to the personalized prosthesis model;

[0010] Implanting the personalized prosthesis into the nose of a cosmetic patient and obtaining a 3D model of the nose after implantation;

[0011] The implanted nose 3D model is compared with the nose 3D model, and the implantation effect of the personalized prosthesis is evaluated.

[0012] Preferably, three-dimensional imaging data of the nose of the cosmetic patient is obtained by CT, MRI, PET, ultrasound or three-dimensional scanning and adjusted to obtain a 3D model of the nose. Various parameters of the nose can be measured on the 3D model of the nose, including: precise data of nasal dorsum length, width, nasal tip protrusion, nasolabial angle, nasofacial angle, and nasofrontal angle, and the degree of cartilage destruction and loss in the nose of the cosmetic patient, as well as data on changes in nasal shape deformity, can be obtained.

[0013] Preferably, the three-dimensional scanning is also used to measure the maximum pulling distance of the nasal skin that the patient can withstand, and combined with the nasolabial angle value, obtain the classification of the degree of nasal contracture of the patient, wherein, if the nasolabial angle is between 100° and 110° and the pulling movement is less than 6mm, it is a mildly contracted nose, and no nasal skin intervention is required, and implant prosthesis surgery can be performed directly; if the nasolabial angle is between 110° and 120° and the pulling movement is less than 4mm, it is a moderately contracted nose, and nasal skin intervention, such as pulling operation, is required to expand the surface area of ​​the nasal skin, and then implant prosthesis surgery is performed; if the nasolabial angle is greater than 120° and the pulling movement is less than 2mm, it is a severely contracted nose, and the patient should be guided to perform nasal skin intervention.

[0014] Preferably, OCT scanning is used to obtain data information on the three-dimensional structure of the nasal skin surface and subsurface of the cosmetic patient, including: quantification of skin roughness, evaluation of skin ductility, and three-dimensional optical attenuation coefficient information and blood perfusion information of the skin in the scar area, evaluation of the scar degree and the internal vascular network, and quantitative guidance for cosmetic patients to perform nasal skin interventions.

[0015] Preferably, the implant prosthesis is constructed according to the nasal 3D model, and combined with the grading of the degree of nasal contracture and the three-dimensional structure data information of the nasal skin surface and subsurface, the designed implant prosthesis is customized in length, width and thickness directions to obtain a preliminary implant prosthesis model.

[0016] Preferably, a personalized prosthesis is prepared according to the personalized prosthesis model, including copying the personalized prosthesis model to a 3D printer, and printing the personalized prosthesis by the 3D printer.

[0017] Preferably, a personalized prosthesis is prepared according to the personalized prosthesis model, including transmitting data of the personalized prosthesis model to a 3D printer, printing a mold of the personalized prosthesis by the 3D printer, and performing perfusion molding to obtain the personalized prosthesis.

[0018] Preferably, the 3D model of the nose after implantation is compared with the 3D model of the nose to determine whether the personalized prosthesis achieves the target effect after being implanted into the nose. If so, the personalized prosthesis is implanted into the nose of the cosmetic patient.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The above technical solution provides a method for manufacturing a contracted nose implant prosthesis, which obtains three-dimensional imaging data of the nose of a cosmetic patient through CT, MRI, PET, ultrasound or three-dimensional scanning and makes adjustments to obtain a nasal 3D model, and combines OCT scanning to obtain data information of the three-dimensional structure of the nose skin surface and below the surface to obtain a preliminary implant prosthesis model, and puts the preliminary implant prosthesis model into the nose 3D model for simulation matching, and then makes further modifications and optimizations based on the matching results to obtain a personalized prosthesis model, and prepares a personalized prosthesis based on the personalized prosthesis model, thereby reducing the influence of human factors on miscalculation of prosthesis manufacturing based on the accurate measurement of the three-dimensional data of the nose, and can obtain nasal skin texture data to improve the accuracy of nasal contracture repair, and can intuitively and accurately simulate the surgical effect before surgery, which is conducive to cosmetic patients and doctors to evaluate the appearance of the nose, meet the requirements of different cosmetic patients for the appearance of the nose, realize the personalized needs of rhinoplasty, and reduce medical disputes after surgery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Flow chart of the manufacturing method of implant-prosthesis for contracted nose DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The present invention provides a method for manufacturing a contracted nasal implant prosthesis, which at least comprises:

[0026] The three-dimensional imaging data of the nose of the cosmetic patient is obtained by CT, MRI, PET, ultrasound or three-dimensional scanning and adjusted to obtain a 3D nose model, and then the data information of the three-dimensional structure of the nose skin surface and subsurface of the cosmetic patient is obtained by OCT scanning;

[0027] constructing an implant prosthesis according to the nose 3D model to obtain a preliminary implant prosthesis model;

[0028] Placing the preliminary implant prosthesis model into the nose 3D model for simulation matching, and then further modifying and optimizing according to the matching result to obtain a personalized prosthesis model;

[0029] A personalized prosthesis is prepared according to the personalized prosthesis model.

[0030] It can be understood that this method accurately measures the three-dimensional data of the nose, reduces the impact of human factors on miscalculations in prosthesis manufacturing, and can intuitively and accurately simulate the surgical effects before surgery, which is beneficial for cosmetic patients and doctors to evaluate the appearance of the nose, meet the requirements of different cosmetic patients for nose appearance, realize the personalized needs of rhinoplasty, and reduce postoperative medical disputes.

[0031] The present invention provides a method for manufacturing a contracted nasal implant prosthesis, and the specific steps are as follows:

[0032] S1: The three-dimensional imaging data of the nose of the cosmetic patient is obtained through CT, MRI, PET, ultrasound or three-dimensional scanning and adjusted to obtain a 3D nose model, and then the data information of the three-dimensional structure of the nose skin surface and subsurface is obtained through OCT scanning.

[0033] Specifically, three-dimensional imaging data of the nose of the cosmetic patient can be obtained through CT, MRI, PET, ultrasound or three-dimensional scanning. Multimodal medical image fusion technology and three-dimensional surface imaging technology can be used to construct an original 3D nose model based on the three-dimensional imaging data, and accurate measurement data of nasal aesthetic subunits such as nasal dorsum length, width, nasal tip protrusion, nasolabial angle, nasofacial angle, nasofrontal angle, nostrils, and nose wings can be calculated. The degree of cartilage destruction and loss in the nose of the cosmetic patient, and the data on nasal deformity changes such as the nostrils and nose wings can also be obtained.

[0034] According to the specific situation of the patient's nose, the original nose 3D model is adjusted to not only make the nose look in line with aesthetic standards, but also make the nose and face proportions harmonious. Although all angles are fixed, each face is unique, and the nose and face proportions are more balanced during comprehensive rhinoplasty.

[0035] Among them, the precise measurement data of the nasal aesthetic subunits include the nasofrontal angle of 25°~30°. For Asians, the forehead is relatively low and flat, and the nasofrontal angle is slightly larger than the standard; the nasolabial angle of women is 95°~100°, and the nasolabial angle of men is 90°~95°; the nasofacial angle is 120°~125°, and the ideal nose length, that is, the distance from the root of the nose to the tip of the nose, should be equal to the distance from the mouth to the submental point, and the protrusion of the tip of the nose is equal to the ideal nose length × 0.67.

[0036] After communication between the doctor and the patient, the original 3D nose model is further adjusted and optimized to obtain a 3D nose model that satisfies the patient, and the skin surface area required for the patient's nose implant surgery is calculated.

[0037] Specifically, the quantification of the nose skin surface area includes: based on the original nose 3D model before optimization and adjustment in this step, the quantification of the nose skin surface area before mechanical stimulation is performed, that is, the calculation of the surface area of ​​the nose 3D model; based on the nose 3D model after optimization and adjustment in this step, the calculation of the nose skin surface area requirement for prosthesis implantation; during the mechanical stimulation process, the nose 3D model at different time points is obtained to evaluate whether the nose skin surface area meets the nose skin surface area requirement after prosthesis implantation, such as mechanical stimulation using the nose external expansion and traction method. If it is achieved, the prosthesis is implanted; if not, the mechanical stimulation is continued.

[0038] Quantitative analysis of skin extensibility: Establish standards: Perform OCT scattering imaging of the nasal skin in a static state to detect the skin extensibility and skin texture, such as skin roughness; perform OCT scattering imaging of the skin under mechanical stimulation to detect the skin extensibility; and establish the correlation between the OCT scattering signal and the skin extensibility. Pre-stimulation evaluation: Perform OCT scattering imaging of the nasal skin of the cosmetic doctor to evaluate the skin extensibility, and provide guidance and suggestions on the extensibility requirements of the nasal skin in combination with the optimization and adjustment of the posterior nasal 3D model in this step, and provide guidance plans for mechanical stimulation of the nasal skin, including the size and cycle of mechanical stimulation. Post-stimulation evaluation: Perform OCT scattering imaging of the nasal skin when the above mechanical stimulation is halfway through and when it is completed, and evaluate the skin extensibility after mechanical stimulation. If the requirements for prosthesis implantation are not met, a subsequent guidance plan is given. If the requirements for prosthesis implantation are met, the mechanical stimulation is terminated. Post-implantation evaluation: After the prosthesis is implanted, further OCT scattering imaging of the nasal skin is performed to evaluate the skin extensibility after implantation to avoid severe discomfort and stretching caused by prosthesis implantation to cosmetic doctors.

[0039] Grading of the degree of nasal contracture: 3D scanning can measure the maximum force of nasal skin pulling distance that the cosmetic doctor can bear, and combine it with the nasolabial angle value to obtain the grading of the degree of nasal contracture of the cosmetic doctor. Among them, if the nasolabial angle is between 100° and 110°, the pulling movement is less than 6mm, which is a mild contracted nose, and no intervention of the nasal skin is required, and the implant prosthesis surgery can be directly performed; if the nasolabial angle is between 110° and 120°, the pulling movement is less than 4mm, which is a moderate contracted nose, and the nasal skin intervention, such as pulling operation, is required to expand the surface area of ​​the nasal skin, and then the implant prosthesis surgery is performed; if the nasolabial angle is greater than 120°, the pulling movement is less than 2mm, which is a severe contracted nose, and the nasal skin intervention, such as pulling operation and injection, is required to expand the surface area of ​​the nasal skin, and then the implant prosthesis surgery is performed. The pulling movement refers to the maximum pulling distance of the cosmetic doctor within the tolerable range, and this value can be achieved with the help of a pulling device.

[0040] Among them, for patients who have insufficient skin for nasal surgery, the nose external expansion and traction method can be used. This method is simple and convenient and can be performed at home, including: (1) single-handed method, pinch the part of the nose that needs to be lifted with the thumb and index finger and pull it repeatedly; (2) double-handed method, use the thumb and index finger of both hands to pinch the part of the nose that needs to be lifted and pull it repeatedly; (3) anti-slip method, pinch the part of the nose that needs to be lifted with the thumb and index finger through a paper towel and pull it repeatedly in methods (1) and (2); insist on pulling for 2-3 hours every day. After a period of operation, see the attending doctor for a follow-up to determine whether it is necessary to continue pulling. This method will improve the surgical effect. However, if there are acne, infection, ulceration, tumor, or incision on the surface of the nose, this operation cannot be performed. This operation can also be achieved with the help of relevant pulling equipment.

[0041] S2: constructing an implant prosthesis according to the nose 3D model, and obtaining a preliminary implant prosthesis model by combining the grading of the degree of nasal contracture and the three-dimensional structure data information of the nose skin surface and subsurface.

[0042] Specifically, the implant prosthesis is constructed according to the nasal 3D model, the degree of nasal contracture is graded, and the three-dimensional structure data information of the nasal skin surface and subsurface is obtained, and the designed implant prosthesis is customized in length, width, thickness and other directions to obtain a preliminary implant prosthesis model.

[0043] S3: Place the preliminary implant prosthesis model into the nose 3D model for simulation matching, and then make further modifications and optimizations based on the matching results, so as to obtain a personalized prosthesis model suitable for the cosmetic patient. Furthermore, place the preliminary implant prosthesis model into the nose 3D model for simulation implantation, and measure the surface area of ​​the nose skin and quantitatively analyze the skin texture, such as roughness, through the three-dimensional scanning and OCT scanning in step S1. The requirements for the ductility of the nose skin of the cosmetic patient for prosthetic implantation, that is, the need for expansion of the skin surface area, are clarified. The doctor then tests the nasal skin of the cosmetic patient to evaluate whether the skin ductility can meet the requirements for prosthetic implantation.

[0044] S4: preparing a personalized prosthesis according to the personalized prosthesis model.

[0045] The optimized and designed personalized prosthesis model is copied to the 3D printer operating system, layered and printed on a path, and a suitable implant material (such as silicone or cartilage tissue of a cosmetic patient) is selected for printing and forming, and the personalized prosthesis is printed by the 3D printer.

[0046] Alternatively, the data of the personalized prosthesis model is transmitted to a 3D printer, a mold of the personalized prosthesis is printed out by the 3D printer, and the mold is perfused and re-molded to obtain a personalized prosthesis.

[0047] S5: implanting the personalized prosthesis into the nose of the cosmetic surgery patient, scanning the face and nose of the cosmetic surgery patient, and obtaining a 3D model of the nose after implantation.

[0048] S6: Compare the implanted nose 3D model with the nose 3D model in step S1, and give aesthetic morphological parameters to evaluate the implantation effect of the personalized prosthesis. Specifically, determine whether the personalized prosthesis achieves the target effect after being implanted into the nose. If so, complete the implantation of the personalized prosthesis into the nose of the cosmetic doctor. If there is a gap with the nose 3D model in step S1, and the cosmetic doctor is not satisfied with the current nose 3D model, further adjustments are made.

[0049] From the above content, it can be known that this method uses three-dimensional imaging technology to establish a three-dimensional digital image of the face of the cosmetic doctor before the operation and simulate the surgical effect, so that the preoperative design is intuitive and accurate, and the cosmetic doctor is involved in the modification to reach a consensus between the two parties, and the trimming of the prosthesis during the operation is guided according to the design parameters. After the operation, the effect of the nose shape and structural changes can be evaluated. The combination of 3D printing technology and three-dimensional imaging technology makes up for the shortcomings of rhinoplasty in the personalized and precise manufacturing of implants; OCT scattering imaging realizes quantitative evaluation of the ductility and texture of the nose skin, and can accurately guide the cosmetic doctor to pull the nose to expand the skin surface area. Such preoperative design and postoperative effect evaluation can not only improve the efficacy and meet the psychological needs of cosmetic doctors, but also enhance the communication between doctors and cosmetic doctors, and reduce postoperative medical disputes.

[0050] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A method for manufacturing a contracted nasal implant prosthesis, characterized in that: include: The three-dimensional imaging data of the nose of the cosmetic doctor is obtained by three-dimensional scanning and adjusted to obtain a 3D model of the nose, and then the data information of the three-dimensional structure of the skin surface and subsurface of the nose of the cosmetic doctor is obtained by OCT scanning; The implant prosthesis is constructed according to the nose 3D model, and combined with the grading of the degree of nasal contracture and the three-dimensional structure data information of the nose skin surface and subsurface, the designed implant prosthesis is customized in the length, width and thickness directions to obtain a preliminary implant prosthesis model; Placing the preliminary implant prosthesis model into the nose 3D model for simulation matching, and then further modifying and optimizing according to the matching result to obtain a personalized prosthesis model; A personalized prosthesis is prepared according to the personalized prosthesis model.

2. The method according to claim 1, characterized in that By acquiring three-dimensional imaging data of the patient's nose through three-dimensional scanning and making adjustments, after obtaining a 3D model of the nose, various parameters of the nose can be measured on the 3D model, including: precise data of nasal dorsum length, width, nose tip protrusion, nasolabial angle, nasofacial angle, nasofrontal angle, nostrils and nose wings, and the degree of cartilage damage and loss in the patient's nose, as well as data on changes in nasal shape deformity, can be obtained.

3. The method according to claim 2, characterized in that Three-dimensional scanning is also used to measure the maximum pulling distance of the nasal skin that the patient can withstand, and combined with the nasolabial angle value, the degree of nasal contracture of the patient is graded. Among them, if the nasolabial angle is between 100° and 110° and the pulling movement is less than 6mm, it is a mildly contracted nose; if the nasolabial angle is between 110° and 120° and the pulling movement is less than 4mm, it is a moderately contracted nose; if the nasolabial angle is greater than 120° and the pulling movement is less than 2mm, it is a severely contracted nose.

4. The method according to claim 1, characterized in that The data information of the three-dimensional structure of the nose skin surface and subsurface of the cosmetic patient obtained through OCT scanning includes: quantification of skin roughness, evaluation of skin ductility, and three-dimensional optical attenuation coefficient information and blood perfusion information of the skin in the scar area, evaluation of scar degree and internal vascular network.

5. The method according to claim 1, characterized in that A personalized prosthesis is prepared according to the personalized prosthesis model, including copying the personalized prosthesis model to a 3D printer, and printing the personalized prosthesis by the 3D printer.

6. The method according to claim 1, characterized in that According to the personalized prosthesis model, a personalized prosthesis is prepared, including transmitting the data of the personalized prosthesis model to a 3D printer, printing a mold of the personalized prosthesis by the 3D printer, and performing perfusion molding to obtain the personalized prosthesis.

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