Method for manufacturing a custom-made corrective dental splint for the simultaneous treatment of a patient's functional, orthodontic, and orthopedic problems

Abstract

A method for manufacturing a custom-made corrective dental splint to correct a patient's oral system, the method being implemented by a computer system, characterized in that it comprises the following steps: (1) receiving an initial 3D model of the patient's oral system; (2) determining functional, orthopedic, and orthodontic diagnostic factors; (3) determining corrective parameters from these factors; (4) generating a corrective 3D model from the initial model, the corrective parameters, and the diagnostic factors; (5) generating at least one 3D model of a custom-made corrective splint to transform the initial model into a corrective model; (6) manufacturing a corrective splint from the 3D model of a custom-made dental splint. Figure to be published with the abbreviation: Fig. 1

Description

Title of the invention: Method for manufacturing a personalized corrective dental splint for the simultaneous treatment of a patient's functional, orthodontic, and orthopedic problems Technical field.

[0001] The invention relates to the technical field of orthodontics and dentofacial orthopedics, and in particular to the design and manufacture of personalized corrective dental aligners.

[0002] The invention relates to a method for manufacturing a personalized dental splint implemented by computer, and designed on the joint basis of functional, orthodontic and orthopedic analyses of the patient and adapted to the age.

[0003] The invention also relates to a corrective dental splint obtained by the aforementioned manufacturing process. State of the art.

[0004] Currently, corrective devices in orthodontics and dentofacial orthopedics are primarily based on the use of aligners, with or without complementary devices, or custom-made rigid removable or fixed appliances that can be combined with standard soft aligners. Other options include fixed or removable orthodontic and orthopedic appliances such as intermaxillary elastics, palatal splints, orthodontic wires, temporary anchorage screws, and bands. These standardized devices require manual customization by the practitioner to adapt the device to the specific requirements and individual maxillofacial and oral morphology of the patient.

[0005] In the particular case of removable dental appliances, the dental professional manufactures them in an almost artisanal manner, assembling different elements on a base typically produced in resin and reworked to adapt it to the patient's anatomy, so as to obtain in the end the corrective dental appliance personalized for the patient.

[0006] This process is highly time-consuming and laborious, and most often requires regular interventions from the dental professional, who must make regular adjustments and checks of the device during treatment. Furthermore, if the corrective device is lost, the dental professional must manufacture a new one, incurring the additional manufacturing cost associated with replacing the device.

[0007] Due to the technical expertise and time required to produce such devices The price of corrective appliances can be relatively high, making them inaccessible to most patients. Furthermore, a major drawback is that patients must wear these appliances continuously for extended periods. In addition, current orthodontic devices do not address all of a patient's functional, orthopedic, and orthodontic needs, which can lead to unsatisfactory results requiring further treatment or even result in the irreparable impossibility of achieving a successful corrective outcome—a phenomenon commonly referred to as "loss of opportunity."

[0008] A major problem with existing corrective devices is that they are not designed to comprehensively address mixed functional, orthopedic, and orthodontic issues. The main reason for this deficiency is the difficulty of jointly integrating the results of functional, orthopedic, and orthodontic analyses of the patient's anatomy onto a single platform capable of defining progressive and effective treatment strategies.

[0009] Currently, there is no solution that can simultaneously correct all dental, skeletal, muscular, and functional dysfunctions, particularly regarding the guidance of tooth growth and the adjustment of jaw position. This lack of a device that fully meets the patient's needs very often leads to unsatisfactory or incomplete results, resulting in prolonged treatment times and / or causing relapses of orthodontic problems and / or lost opportunities.

[0010] Furthermore, generic dental aligners are standardized, and fixed orthodontic appliances can cause significant discomfort for patients, particularly due to the pressure exerted on the teeth and gums, as well as the difficulties encountered in maintaining adequate oral hygiene. Indeed, cleaning and maintaining these devices can be complex, thereby increasing the risk of infections or dental complications.

[0011] Currently, there is no automated manufacturing process for a corrective dental splint that simultaneously integrates, from the design stage, the necessary corrective elements according to the patient's needs, established on the basis of joint functional, orthodontic, and orthopedic analyses of the patient's anatomical structures. Due to the complexity and diversity of individual patient needs for dentofacial treatment, current devices are not designed to address the patient's specific problems holistically. Thus, in the absence of a solution that addresses all these drawbacks, practitioners are forced to use several devices or techniques to treat the same patient, which can increase treatment time and cost. Furthermore, the use of multiple devices to treat the patient's various problems can lead to complications and additional costs, as the devices could interact in unforeseen ways or not be perfectly compatible with each other.

[0012] Furthermore, the lack of comprehensive integration of functional, orthodontic, and orthopedic aspects by current appliances can lead to unsatisfactory results due to the failure to consider all of the patient's needs. This can lead to relapse problems, where orthodontic or orthopedic issues reappear after the end of treatment, requiring further interventions or resulting in a loss of opportunity.

[0013] There is therefore a need for a manufacturing process for a personalized corrective dental splint, adapted to the morphology of the patient and meeting all of the patient's functional, orthopedic and orthodontic problems; thus making it possible to optimize the effectiveness and quality of the corrective dental splint, while reducing potential complications and improving the overall patient experience.

[0014] The invention therefore falls within this context and aims to resolve all of the aforementioned drawbacks. Thus, the invention seeks to propose a method for manufacturing a personalized corrective dental splint for a patient; said splint being designed from a 3D model defined so as to jointly integrate the results of a set of functional, orthodontic and orthopedic analyses of the oral and dental system of said patient according to his / her age; and so that the splint simultaneously corrects the patient's problems with regard to functional, orthopedic and orthodontic aspects.

[0015] The invention relates to a method for manufacturing a personalized corrective dental splint to correct a patient's oral system, the method being implemented by a computer system, characterized in that it comprises the following steps: • stage of receiving by the computer system at least one 3D model, called the initial model, of the patient's oral and dental system; • stage of determining functional, orthopedic and orthodontic diagnostic factors of the patient's oral system; • step of determining a set of corrective parameters of the patient's oral system based on said diagnostic factors; • generation step of a 3D model, called corrective model, from the initial model, said corrective parameters and said diagnostic factors; • step of generating at least one 3D model of a custom corrective splint allowing the initial model to be transformed into the corrective model; • manufacturing step of a corrective splint from said 3D model of a personalized dental splint.

[0016] In one embodiment of the invention, the computer system comprises a computing unit, a storage memory and a digital terminal, said digital terminal allowing the computing unit to be controlled by means of a graphical interface of said digital terminal and access to said storage memory so as to be able to access, transmit and modify its contents.

[0017] Advantageously, said storage memory being capable of storing a plurality of 2D and / or 3D images of one or more anatomical parts of a patient, in particular of the oral and dental system of said patient, in particular such as panoramic radiographs, intraoral radiographs, intra and extraoral photographs.

[0018] In one embodiment of the invention, the computer system is an embedded computer system, in particular in the form of a digital tablet or a computer, capable of receiving and transmitting data by means of a wired and / or wireless and / or satellite communication network.

[0019] In an alternative embodiment of the invention, said digital terminal of the computer system is a remote digital terminal, capable of communicating and exchanging data with the computing unit and with the storage memory.

[0020] Advantageously, the computing unit is capable of executing a plurality of algorithms for rendering, modifying and visualizing 3D digital models, including anatomical digital models and digital models of corrective dental splints.

[0021] Advantageously, said computing unit is capable of executing a plurality of algorithms for analyzing, managing and processing 2D and / or 3D images and / or a combination of 2D and 3D images.

[0022] If desired, the computer system may include a second remote storage memory, accessible via a communication network; said second storage memory being capable of storing a plurality of 2D and / or 3D images of one or more anatomical parts of a patient, in particular of the oral and dental system of said patient.

[0023] Advantageously, the computer system includes a graphical interface allowing the visualization of 2D and / or 3D images as well as allowing the rendering of a 3D model of the patient's dentofacial anatomy, in particular of the patient's oral system and / or a 3D model of a dental splint.

[0024] If desired, said graphical interface may be a touch graphical interface and said computer system may be fully embedded on a digital tablet.

[0025] Advantageously, said graphical interface may be designed to display content intended to be viewed using 3D glasses.

[0026] Advantageously still, said graphical interface may be designed to display graphic content using a virtual reality headset, including one compatible with 3D volumetric visualization effects.

[0027] Advantageously, the step of determining functional, orthopedic and orthodontic diagnostic factors of the patient's oral and dental system makes it possible to establish a comprehensive assessment of the patient's clinical situation, in particular taking into account the age and stage of growth of said patient, and to establish the links of dependence between the different diagnostic factors.

[0028] Depending on the patient's age, treatment options may be more or less limited. Treatment with a custom-made corrective splint incorporates this information from the design stage, thus ensuring growth guidance adapted to the different phases of dental and skeletal development, particularly taking into account the eruption of permanent teeth and changes in the facial skeleton. Thanks to this personalized approach, the splint offers more effective treatment adapted to the patient's evolving needs throughout their growth. This ability to adapt to the different stages of development leads to better results in terms of dental alignment and the correction of orthopedic and functional problems.

[0029] Preferably, the estimation of functional, orthopedic, and orthodontic diagnostic factors is performed automatically by the computer system's processing unit. This processing unit uses specific algorithms to analyze data collected from the patient's 2D and / or 3D dentofacial images, as well as the results of functional tests performed by a healthcare professional or through direct analysis of a patient video. Using this data, the processing unit is able to accurately estimate the patient's specific dental treatment needs and generate a 3D model of the personalized corrective splint that takes these needs into account.

[0030] Furthermore, using a computing unit for estimating diagnostic factors offers several advantages over manual assessment. First, the computing unit can process large amounts of data in minimal time, enabling faster and more accurate design of the corrective splint. In addition, the computing unit can perform complex analyses to determine the patient's specific dental treatment needs and generate a 3D model that integrates all these needs coherently and efficiently. Finally, using a computing unit for estimating diagnostic factors standardizes the design method for the corrective splint, thus ensuring consistent quality and accuracy for each patient treated.

[0031] In one embodiment of the invention, the step of determining functional diagnostic factors is performed automatically by the computing unit from videos of the patient's anatomy.

[0032] Functional diagnostic factors include, in particular, the patient's ventilation, chewing, swallowing, speech and salivation.

[0033] Advantageously, the determination of functional diagnostic factors may be based in particular on the volume of the aeropharyngeal corridor, the position of the tongue within the oral cavity, the relative position of the hyoid bone, the presence of lordosis or kyphosis of the vertebral column, the volume of the tonsils and adenoids, the presence of a deviation of the nasal septum, the volume of the frontal or maxillary sinuses as well as the quantity of mastoid cells present.

[0034] Preferably, functional diagnostic factors such as the patient's chewing, swallowing, speech, and salivation can be measured using specific functional tests. For example, to assess chewing, the patient may be asked to chew different foods of varying textures and consistencies, while to assess swallowing, the patient may be asked to drink or swallow different amounts of water or food.

[0035] To automatically measure these functional diagnostic factors, the computing unit uses specific algorithms to analyze the results of functional tests recorded using equipment such as pressure sensors, high-speed cameras, and microphones. Using this data, the computing unit is able to accurately estimate jaw function and functional problems, such as disorders of chewing, swallowing, speech, or salivation.

[0036] In addition, the computing unit can also analyze radiographic data to assess the bone structure and soft tissues of the jaw and skull, thereby enabling the detection of functional abnormalities and jaw disorders. By combining these different analyses, the computing unit is able to perform a comprehensive and accurate assessment of the patient's functional diagnostic factors.

[0037] Orthopedic diagnostic factors include, in particular, the geometric and structural relationships between the upper and lower dental arches, the ability to close the lip, orofacial muscle tone, the coordination of jaw movements, occlusal balance, the coordination of tongue movements, the resting position of the mandible, the presence of joint and / or muscle pain, the presence of skeletal imbalances, or tissue and musculoskeletal malformations.

[0038] Advantageously, the determination of orthopedic diagnostic factors may be based, in particular, on a plurality of criteria including the orientation and inclination of the palatal and maxillary planes in the transverse direction, a set according to Ballard's classes, and measurements of mandibular and / or maxillary deviation by relationship to the midline, mandibular angles, relative position of the mandible, position and orientation of the occlusal plane relative to a reference plane, presence of endognathia or exognathia.

[0039] Orthodontic diagnostic factors include the location and alignment of teeth, the inclination and rotation of teeth, the size of interdental spaces, the presence of crowding or dental overlap, the presence of endo-alveolia or exo-alveolia, the absence of teeth and anomalies in the shape and size of teeth.

[0040] Advantageously, the determination of orthodontic diagnostic factors may be based, in particular, on the alignment of the teeth, the presence of diastemas, a measurement of dental crowding, a measurement of dental rotations, the presence of labio-lingual malpositions, a measurement of overjet and / or open bite, the analysis of the curve of Spee, the measurement of the width of the dental arches, the evaluation of the sagittal relationships between the arches, the detection of possible transverse problems and the evaluation of the inclination of the incisors.

[0041] In one alternative or cumulative embodiment of the invention, the step of determining orthodontic factors includes, in particular, taking into account the patient's dental growth, as well as the inflammatory effects associated with said growth. Advantageously, this approach makes it possible to design a splint that considers the emergence of new teeth and possible gum inflammation. Thus, the splint is designed to leave sufficient space in a planned cavity to accommodate a new tooth, while taking into account gum inflammation. This anticipation of future needs ensures better adaptation of the splint to the patient's dental changes, thereby improving the effectiveness and comfort of the orthodontic treatment.

[0042] If desired, the computer system used for designing the custom-made corrective aligner is also capable of performing additional analyses, beyond the automatic analyses carried out by the computing unit. These additional analyses can be performed by a dental professional, such as an orthodontist or a specialist dentist.

[0043] For example, a dental professional may perform an analysis of dental plaque, gingivitis, and any cavities to determine the patient's level of oral health. They may also assess the functions and relationship between the upper and lower jaws to determine the patient's specific needs for orthopedic, orthodontic, and functional correction.

[0044] Once these additional analyses have been carried out, the results can be integrated into the computer system to further refine the design of the gutter personalized corrective. In this way, the computer system offers a complete and flexible solution for the design of the corrective splint, which can be adapted to the specific needs of each patient according to their functional, orthopedic and orthodontic diagnostic factors.

[0045] Advantageously, the step of determining a set of corrective parameters of the patient's oral and dental system from the determined diagnostic factors makes it possible to address at the same time all of the patient's functional, orthopedic and orthodontic problems.

[0046] If desired, each corrective parameter may include a numerical index indicating the time at which said corrective parameter must be taken into account for the manufacture of the gutter.

[0047] Advantageously, the step of generating a corrective 3D model is carried out using previously determined corrective parameters and diagnostic factors. This combination of elements makes it possible to address all the problems and define said corrective 3D model, representing an ideal target for the patient's oral system.

[0048] Advantageously, parameters such as the patient's age, the patient's dental age, the patient's growth stage, the presence of innate or acquired morphological malformations, or the presence of genetic diseases can be taken into consideration in the process of determining said 3D model.

[0049] Advantageously, when the computing unit identifies the need to use a plurality of corrective dental splints to transform the initial 3D model into the corrective 3D model, the computing unit generates a succession of intermediate 3D models, in the same number as the number of corrective dental splints so that the last model generated corresponds to said corrective 3D model and so that each intermediate model defines an intermediate corrective model.

[0050] In an alternative embodiment, the 3D model can be used to generate a mold of the corrective splint, which is also considered a negative of the splint. This mold, or negative, represents the complementary shape to the desired corrective splint. It is used to create a mold into which the biocompatible material will be introduced to form the corrective splint.

[0051] Advantageously, creating a mold from the 3D model makes it possible to obtain custom-made aligners with high precision, respecting the specific dimensions and details of the patient's dentition. This method offers flexibility in the production of corrective aligners adapted to the individual needs of patients.

[0052] In practice, the choice of using a 3D model to generate a splint mold, or a splint negative, will depend on the specific requirements of the treatment, the materials used, and the practitioner's preferences. Their implementation allows to optimize the manufacturing process according to technical constraints and desired therapeutic objectives.

[0053] Advantageously, the manufacturing step of a corrective dental splint from said 3D model makes it possible to obtain a dental splint whose shape is designed to meet all the functional, orthopedic and orthodontic diagnostic factors previously identified.

[0054] Advantageously, when the computing unit identifies the need to use a plurality of corrective dental splints to transform the initial 3D model into the corrective 3D model to carry out the treatment, the manufacturing step generates as many corrective dental splints as intermediate 3D models, so that each corrective dental splint takes into account at least some of the corrective parameters determined beforehand and so that the corrective elements present on any of the splints are determined according to the temporality index associated with each of said corrective parameters.

[0055] In the present invention, "3D model of a patient's oral system" means a three-dimensional digital representation of the set of teeth, gums, underlying bone and tissue structures of the patient's oral cavity, obtained from digitization data from, in particular, an intraoral scan, a photograph, magnetic resonance imaging, or computed tomography imaging, or any combination of these techniques.

[0056] In the present invention, the term "oral and dental system" of a patient means the complex set of structures that make up the oral cavity and the dentition of said patient; including in particular: a. soft tissues such as the gums, tongue and oral mucosa covering the internal walls of the mouth; b. the bony base, in particular the upper and lower jaws, the dental alveoli and the hard palate; and c. the teeth and their different parts such as the roots, the dentin and the dental pulp.

[0057] In the present invention, "diagnostic factors" means a set of anatomical conditions of the patient recognized as functional, orthodontic and orthopedic dysfunctions.

[0058] The diagnostic factors used as a basis for determining the necessary corrective parameters of the patient's oral and dental system are determined from the patient's dentofacial anatomy, muscular and skeletal structures, and age, and more particularly from their dentition, as well as from individual needs and appropriate treatments for the design of the corrective dental splint. sonalized, then serving as a basis for determining the necessary corrective parameters of the patient's oral system.

[0059] In a cumulative embodiment of the invention, the step of receiving a 3D model of the patient's oral system is preceded by a step of providing at least one dentofacial image of the patient and a step of generating a 3D model of the patient's oral system from said dentofacial image.

[0060] Advantageously, the dentofacial image may in particular be obtained by imaging techniques such as panoramic radiography, cone scanning, magnetic resonance imaging, digital volumetric tomography, 3D photogrammetry or any combination of two or more of said imaging techniques.

[0061] By proceeding in this way, the computer system makes it possible to generate, from the dentofacial image provided, a 3D model of the oral-dental system of the patient for the purpose of the diagnostic evaluation of the initial situation of the patient by means of the determination of functional, orthopedic and orthodontic diagnostic factors.

[0062] Advantageously, the step of generating a 3D model of the patient's oral and dental system from the provided dentofacial image may include the use of three-dimensional geometric reconstruction algorithms of structures from two-dimensional images, and in particular volumetric mesh reconstruction algorithms; as well as post-processing algorithms to correct errors in 3D meshes and / or to improve resolution by eliminating artifacts, smoothing surfaces and / or reducing the number of constituent elements of the mesh.

[0063] In a cumulative embodiment of the invention, at least one dentofacial image is obtained from dental impressions or three-dimensional images of the patient's oral system.

[0064] By proceeding in this way, the use of dental impressions and / or three-dimensional images of the patient's oral system makes it possible to generate a 3D model of the patient's oral system with high fidelity and thereby increase the final resolution of the model, thus making it possible to capture fine details of the patient's oral system that might not be taken into account if the 3D model were generated solely from two-dimensional images.

[0065] In a cumulative embodiment of the invention, the step of generating at least one 3D model of a personalized corrective splint comprises the generation of a sequence of 3D models, based on the expected evolution of the patient's morphology during treatment, and allowing the initial model to be progressively transformed into the corrective model; and in that it comprises a sequence of manufacturing steps for a corrective splint from each of the 3D models of said 3D model sequence.

[0066] Advantageously, the generation of a sequence of 3D models associated with said sequence of manufacturing steps for a corrective splint makes it possible to progressively correct functional, orthopedic, and orthodontic defects as identified in the diagnostic factor determination step; and to ensure the progressive modification of the patient's dental and maxillofacial anatomy so as to improve the speed and effectiveness of treatment while minimizing patient discomfort. Furthermore, this allows for consideration of expected progress during treatment, thus enabling the rearrangement of certain elements of the splint, particularly initial corrective elements, which may no longer be necessary at a later stage of treatment or may need to be introduced following a prior modification of the patient's anatomy.For example, a tongue retraining element may be included on the first corrective splint but removed on subsequent splints; similarly, a dental growth guidance element can only be integrated into the splint following palatal expansion that widens the dental arch and palate, thus conditioning the presence of said guidance element in the splint to a later stage.

[0067] Even more advantageously, compared to traditional aligners, the custom-made corrective tray developed through this invention reduces the number of trays required in the treatment sequence. Thanks to advanced customization and consideration of orthodontic, functional, and orthopedic factors, these trays are designed to offer more effective and targeted treatment. Thus, patients can benefit from faster progress toward the desired dental alignment, thereby reducing the total number of trays required during treatment. This results in faster treatment, lower costs, and greater patient comfort.

[0068] In one alternative or cumulative embodiment of the invention, the corrective gutter is made from an elastic material.

[0069] Advantageously, the use of an elastic material offers increased patient comfort and maximizes the adaptation of the splint to the patient's anatomy.

[0070] In another embodiment of the invention, again alternative or cumulative, the corrective splint is also made from a biocompatible and resistant material.

[0071] Advantageously, the choice of a biocompatible material ensures good tolerance by the patient's body, limiting the risks of allergy and irritation. The material's resistance, for its part, ensures the durability and effectiveness of the aligner throughout the orthodontic treatment.

[0072] Advantageously, the use of a biocompatible material ensures that the gutter is well tolerated by the patient's oral tissues, thus reducing the risk of allergic reactions or irritations and improving patient comfort and treatment safety.

[0073] In addition, the increased resistance of the biocompatible material ensures the durability of the corrective dental splint over time, allowing said splint to withstand daily wear and tear and to preserve its shape and function despite the mechanical stresses suffered when the patient wears the splint.

[0074] If desired, the corrective splint may in particular be manufactured, in part or in whole, from a biocompatible material such as elastomers, ethylene-vinyl acetate, glycolized polyethylene terephthalate, thermoplastic polyurethane, 3D printing resins, silicone, polyetheretherketone, or any combination obtained from said materials.

[0075] In one embodiment of the invention, the corrective splint is made from a colored material or a material suitable for dyeing. Advantageously, this coloring allows the splint to be personalized to the patient's taste, thereby encouraging the wearing of the corrective splint and improving the success of the treatment.

[0076] If desired, the corrective splint may be made of a translucent material or have substantially translucent areas, in color or completely transparent.

[0077] Alternatively, the corrective dental splint may be made of an opaque material or have substantially opaque areas, in color or suitable for being colored.

[0078] In one alternative or cumulative embodiment of the invention, the corrective gutter includes decorative elements such as color patterns, texture patterns, or relief or engraving patterns.

[0079] Advantageously, the presence of such decorative elements allows for complete personalization for the patient, so as to encourage proper wearing for the success of the treatment; for example, embossing the patient's name or a raised decorative element such as an animal or a symbol chosen by the patient.

[0080] Advantageously, the embossed marking element could be a QR code, which could contain treatment-specific information, such as the practitioner's contact details, instructions for using and caring for the aligner, or treatment monitoring and follow-up information. This QR code would allow the patient, as well as the healthcare professionals involved in monitoring the treatment, to easily access relevant information, thus improving communication and treatment monitoring. Furthermore, the use of a QR code offers a discreet solution for including important information without compromising the aesthetics of the aligner.

[0081] In a cumulative embodiment of the invention, the manufacturing step of the The gutter is manufactured using an additive manufacturing process based on a 3D model of the customized corrective gutter.

[0082] Advantageously, manufacturing the corrective splint using an additive manufacturing process ensures an optimal fit to the patient's anatomy, particularly by precisely adapting to the specific characteristics of the patient's oral and dental system. Furthermore, using an additive manufacturing process reduces the time and cost of manufacturing the corrective splint.

[0083] In a cumulative embodiment of the invention, the additive manufacturing process is a 3D printing process in resin and / or silicone.

[0084] Advantageously, 3D printing in resin and / or silicone, due to their mechanical properties, makes it possible to produce complex-shaped corrective dental aligners while offering good durability over time, resulting in a more comfortable, more aesthetic treatment better adapted to the individual requirements of the patient and facilitating the work of the dental professional.

[0085] Advantageously, due to their elastic and flexible nature, silicone splints offer a particularly soft and pleasant wearing experience for the patient, thus reducing potential irritations and discomforts and improving patient adherence to treatment.

[0086] In a cumulative embodiment of the invention, the manufacturing step of the gutter is implemented by a resin and / or silicone molding process of the gutter from the 3D model of the personalized corrective gutter.

[0087] Advantageously, the molding process allows for the faithful reproduction of the complex details of the 3D model, thus ensuring an optimal fit of the corrective splint to the patient's oral system. Furthermore, the molding process is also faster and less expensive compared to conventional methods of manufacturing dental splints, such as the manual assembly of metal and resin-based structures by the dental professional.

[0088] In one alternative or cumulative embodiment of the invention, the step of generating at least one 3D model of a personalized corrective splint includes adding to said 3D model corrective elements that can subsequently be removed from the 3D model.

[0089] Advantageously, the addition of corrective elements that can be subsequently removed from said 3D model allows for correct planning of the treatment steps, at the same time facilitating the adjustment of the corrective splint according to the expected evolution of the patient's oral system.

[0090] These include, in particular, corrective elements that can be subsequently removed from the 3D model of the custom corrective splint: dental spacers to create space between the teeth, orthodontic buttons to facilitate tooth traction, Elastic bands to correct malocclusions, mini-screws to facilitate tooth movement, and other elements to correct tooth position and improve dental occlusion are all incorporated into the design. Adding these corrective elements allows for planning the various stages of dental treatment and adjusting the splint according to the anticipated evolution of the patient's oral system. In this way, the invention offers personalized and optimized dental treatment for each patient, while simplifying the manufacturing and fitting process of the splint.

[0091] In a cumulative embodiment of the invention, the step of generating at least one 3D model of a personalized corrective splint includes adding to said 3D model retention elements to improve the effectiveness of the splint.

[0092] These include, in particular, retention elements, attachments, hooks, side retainers for the splint, wing-shaped fixing elements, and special retention elements such as composite resin buttons or metal attachments. Advantageously, the retention elements are designed to ensure better transmission of the corrective forces induced by the splint, thus contributing to improved overall treatment effectiveness. The retention elements are added in a customized manner for each patient, according to the morphology of their dentition and the specific needs of their treatment.

[0093] In a cumulative embodiment of the invention, the step of generating at least one 3D model of a personalized corrective splint includes adding to said 3D model elements intended to correct dental and / or bone malpositions.

[0094] Advantageously, the elements intended to correct dental and / or bone malpositions allow the corrective splint to be adapted precisely and individually according to the specific needs of the patient, while at the same time the risks of complications due to a poorly fitted splint are minimized.

[0095] In particular, elements for correcting dental and / or bone malpositions include orthodontic bands, dental aligners, orthodontic wires, dilators, Herbst rods, molar lifts, planas tracks, intermaxillary elastics, springs, palatal expanders, palatal plates, including jack plates, butterfly plates, Hawley plates, Stephenson plates and Fouet plates, with or without wings.

[0096] In one alternative or cumulative embodiment of the invention, the step of generating at least one 3D model of a personalized corrective gutter includes the addition of attachment elements for auxiliary elements, such as elastic bands or springs.

[0097] Advantageously, the incorporation of said attachment elements of auxiliary elements on the 3D model of the corrective splint makes it possible to take into account directly the dimensions and mechanical constraints of said attachment elements and / or to simulate on a computer their impact on the patient's oral cavity.

[0098] In one alternative or cumulative embodiment of the invention, the corrective dental splint is geometrically designed to re-educate the muscles and supporting structures of the patient's jaw.

[0099] Advantageously, the geometric design of the splint can be chosen so as to improve jaw function and tooth position, making it easier to maintain long-term oral hygiene by creating a healthier oral environment.

[0100] Even more advantageously, the custom-made corrective splint improves the patient's quality of life, particularly by facilitating better breathing and positively impacting the growth and development of the future adult. By correcting dental malpositions and occlusion problems, the splint can help restore dental alignment and a healthy jaw, contributing to easier breathing and improved upper airway function.

[0101] Furthermore, by correcting orthodontic problems in children and adolescents, the custom-made aligner can have a beneficial effect on facial growth and development, thus preventing future problems related to the jaw, teeth, and facial muscles. This can lead to improved facial aesthetics and better chewing function, thereby contributing to a better quality of life and greater self-confidence in the future adult.

[0102] In an alternative or cumulative embodiment of the invention, the gutter may include elements for measuring the wearing time by the patient, in particular integrated sensors such as accelerometers, temperature sensors and / or pressure sensors and / or color markers or wear indicators.

[0103] Advantageously, these wear sensors detect when the splint is inserted into the patient's mouth and record the duration of wear. Furthermore, wear indicators, such as color markers or wear indicators, can be used to help the patient and dental professional monitor treatment progress and verify proper splint wear.

[0104] Advantageously, the gutter may include magnetic elements, oriented so as to exert a force in a predetermined direction and with a pre-selected intensity, thus allowing targeted and precise action on the desired anatomical parts. These magnetic elements may be magnets, in particular those made of neodymium, which offer a strong magnetic force despite their small size. These magnets can be placed inside the tray, in specific locations corresponding to the areas of the teeth to be treated, or attached to complementary dental accessories, such as orthodontic brackets, thus improving the effectiveness of the tray.

[0105] The invention also relates to a personalized corrective dental splint for correcting a patient's oral system and manufactured using the manufacturing process described above.

[0106] Advantageously, by opting for a corrective dental aligner rather than a fixed dental appliance, the patient benefits from superior comfort without sacrificing treatment effectiveness. Due to its high efficiency, the dental aligner allows for less wearing time compared to traditional fixed dental appliances, contributing to a better overall patient experience while ensuring successful orthodontic treatment. Thus, the corrective dental aligner is worn primarily at night and for a few hours, typically two hours, during the day.

[0107] If desired, graphic marking elements, such as drawings, logos, signs, symbols or text, can be integrated onto the corrective dental splint thanks to the manufacturing process used.

[0108] Advantageously, the graphic marking elements allow for advanced personalization, contributing on the one hand to inserting in particular the manufacturer's brand and / or adding decorative graphics in order to offer increased motivation for the patient to wear the corrective dental splint, particularly in children.

[0109] The invention also relates to a computer program, stored on a data carrier, and comprising program code which is designed to, when executed by a computer, implement the manufacturing process of a custom corrective splint previously described.

[0110] The invention also relates to a data carrier on which is recorded the computer program comprising program code which is designed to, when executed by a computer according to an embodiment of the invention described above. Brief description of the figures.

[0111] Other advantages and features of the present invention are now described by means of purely illustrative and in no way limiting examples of the scope of the invention, and from the accompanying drawings, in which the various figures represent:

[0112] [Fig. 1] represents, schematically and partially, a block diagram of a method for manufacturing a corrective dental splint according to an embodiment of the invention.

[0113] [Fig.2] represents, schematically and partially, a computer system for manufacturing personalized corrective dental aligners and linked to an additive manufacturing system for dental aligners according to an embodiment of the invention.

[0114] [Fig.3] represents, schematically and partially, a graphical interface for analyzing 2D and / or 3D images and for analyzing, generating and visualizing 3D models of a patient's oral and dental system according to an embodiment of the invention.

[0115] [Fig.4] represents, schematically and partially, an initial 3D model and a corrective 3D model of a patient's oral system.

[0116] [Fig.5] represents, schematically and partially, a 3D model of a personalized corrective dental splint manufactured from a 3D corrective model of a patient's oral system according to an embodiment of the invention.

[0117] [Fig.6] represents, schematically and partially, a personalized corrective dental splint manufactured using the dental splint manufacturing process according to an embodiment of the invention.

[0118] In the following description, identical elements, by structure or by function, appearing on different figures retain, unless otherwise specified, the same references. Description of the implementation methods.

[0119] A process for manufacturing a personalized corrective dental splint 30 for correcting a patient's oral system is shown in [Fig. 1], the process being implemented by a computer system 10.

[0120] The process includes a first step -2 of providing a first dentofacial image 19, in this case a radiograph, and a second three-dimensional image of the patient's oral-dental system (not shown).

[0121] The process then includes a step -1 of generating an initial 3D model of the patient's oral system 20 from the radiograph 19 and the three-dimensional image of the patient's oral system.

[0122] The process then includes a step 1 of receiving by the computer system the 3D model of the oral-dental system of the patient 20.

[0123] The process then includes a step 2 of determining functional, orthopedic and orthodontic diagnostic factors 101 of the patient's oral system. The determination of said factors is carried out by the calculation unit 11 of the computer system 10 and is based on a set of measurements and calculations on anatomical parameters derived from the initial 3D model 20 and analyses performed on the radiographic 19 and three-dimensional images of the patient's oral system.

[0124] The process then includes a step 3 of determining a set of corrective parameters of the patient's oral system from the previously determined diagnostic factors 101.

[0125] The process then includes a step 4 of generating a corrective 3D model 21 from the initial model 20, corrective parameters and diagnostic factors.

[0126] The process then includes a step 5 of generating a 3D model of a customized corrective dental splint 22 allowing the initial model 20 to be transformed into the corrective model 21

[0127] The process includes a final step 6 of manufacturing a corrective splint 30 from the 3D model of a personalized corrective dental splint 22.

[0128] Figure 2 shows a computer system for manufacturing custom corrective dental aligners 30 connected to an additive manufacturing system 40 for dental aligners. The computer system includes a computing unit 11, a storage memory (not shown) containing a radiograph 19, a three-dimensional image of the patient's oral system, and a 3D model of the patient's oral system. The computer system 10 also includes a digital terminal for controlling the computing unit 11 via a graphical interface 13 and for accessing the storage memory so as to duplicate, delete, transmit, and modify the contents of said storage memory.

[0129] The computer system 10 includes a communication device 14 connected to the internet network and enabling the control of the dental aligner manufacturing system 40. The dental aligner manufacturing system 40 is a 3D printing system for dental aligners 30 made of biocompatible silicone and of a color substantially similar to that of the patient's teeth.

[0130] Figure 3 shows a detailed view of the graphical interface 13 at a specific point in its use. It displays the patient's radiographic image 19 and a set of measurement lines and angles 101 for determining the patient's functional, orthopedic, and orthodontic diagnostic factors.

[0131] The graphical interface 13 also presents a second viewing window where a dynamic visualization of the 3D model of the patient's oral and dental system 20 is superimposed with the radiographic image 19.

[0132] Figure 4 shows the initial 3D model 20 of the patient's oral system and the corrective 3D model 21 of the patient. Point 100 is a reference point, serving as a visual aid and allowing the changes in the patient's oral system to be distinguished between the two models. In the initial model 20, a misalignment of the upper jaw relative to the lower jaw is visible, which has been automatically corrected in the corrective model 21.

[0133] A 3D model of a custom corrective dental splint 22 obtained by the manufacturing process is shown in [Fig. 5], allowing the initial 3D model 20 to be transformed into the corrective 3D model 21. The corrective dental splint per sonnalisée 22 is of a color substantially similar to that of the patient's teeth and is made of biocompatible silicone by a 3D silicone printing method.

[0134] A corrective dental splint 30 is shown in [Fig. 6] from two different viewpoints. During step 3 of determining the corrective parameters of the patient's oral dentition, it was determined that a corrective parameter for tongue position should be introduced. Taking into account the different types of expectations depending on dental age, such as the specific needs related to primary teeth and future permanent teeth, appropriate adjustments were made to the splint design. Based on this information, a corrective element 31 was designed, thus leading to the presence of said corrective element both on the 3D model of the splint 22 and on the custom-made corrective splint 30.

[0135] The corrective gutter 30 is made of an opaque material of light grey colour.

[0136] The corrective gutter 30 also includes a graphic element 32 of person nalisation, corresponding to the patient's name.

[0137] The preceding description clearly explains how the invention achieves its stated objectives, namely, to provide a method for manufacturing a personalized corrective dental splint for a patient that jointly integrates the results of a set of automated functional, orthodontic, and orthopedic analyses of the patient's oral system, in order to simultaneously correct problems related to functional, orthopedic, and orthodontic aspects. This method is based on the creation of a specific 3D model for each patient, which makes it possible to design a splint perfectly adapted to their age, dental morphology, and orthodontic and orthopedic needs.

[0138] In any event, the invention is not limited to the embodiments specifically described in this document, and extends in particular to all equivalent means and to any technically feasible combination of these means. In particular, other embodiments of the corrective dental splint may be considered using different materials or manufacturing techniques than those previously described. The use of more advanced 3D modeling techniques or more recent 3D printing technologies may be considered. Furthermore, the invention can be adapted to other dental or medical applications, such as the manufacture of dental prostheses, the manufacture of custom dental implants, or the creation of medical devices for other parts of the body.

Claims

Demands

1. A method for manufacturing a personalized corrective dental splint (30) for correcting a patient's oral system, the method being implemented by a computer system (10), characterized in that it comprises the following steps: a. step (1) of receiving by the computer system at least one 3D model (20), called initial model, of the patient's oral and dental system. b. step (2) of determining functional, orthopedic and orthodontic diagnostic factors of the patient's oral system, said step comprising: i. the determination of functional diagnostic factors relating to the patient's ventilation, mastication, swallowing, speech and salivation; ii. the determination of orthopedic diagnostic factors relating to the geometric and structural relationships between the upper and lower dental arches, the ability to close the lip, orofacial muscle tone, the coordination of jaw movements, occlusal balance, the coordination of tongue movements, the resting position of the mandible, the presence of joint and / or muscle pain, the presence of skeletal imbalances and tissue and musculoskeletal malformations; iii. the determination of orthodontic diagnostic factors relating to the location and alignment of teeth, the inclination and rotation of teeth, the size of interdental spaces, the presence of crowding or dental overlaps, the presence of endo-alveolia or exo-alveolia, the absence of teeth and anomalies in the shape and size of teeth; c. step (3) of determining a set of corrective parameters of the patient's oral system from said diagnostic factors; d. step (4) of generating a 3D model (21), called model corrective, from the initial model (20), said corrective parameters and said diagnostic factors; e. step (5) of generating at least one 3D model (22) of a personalized corrective splint enabling the transformation of the initial model (20) into the corrective model (21); f. step (6) of manufacturing a corrective splint (30) from said 3D model of a personalized dental splint.

2. A method according to claim 1, characterized in that the step of receiving a 3D model (20) of the patient's oral system is preceded by a step (-2) of providing at least one dentofacial image (19) of the patient and a step (-1) of generating a 3D model (20) of the patient's oral system from said dentofacial image (19).

3. Method according to claim 2, characterized in that said at least one dentofacial image (19) is obtained from dental impressions or three-dimensional images of the patient's oral system.

4. A method according to claim 1 or 2, characterized in that the step of generating at least one 3D model of a customized corrective splint (22) comprises the generation of a sequence of 3D models enabling the initial model (20) to be progressively transformed into the corrective model (21); and in that it comprises a sequence of manufacturing steps for a corrective splint from each of the 3D models of said sequence of 3D models.

5. A method according to any one of claims 1 to 4, characterized in that step 6 of manufacturing the corrective dental splint (30) is implemented by an additive manufacturing method of the splint from the 3D model (22) of the personalized corrective splint.

6. A method according to any one of claims 1 to 4, characterized in that step 6 of manufacturing the splint is carried out by a method of molding the splint in resin and / or silicone from the 3D model (22) of the personalized corrective dental splint.

7. A method according to any one of claims 2 or 3, characterized in that the step of generating at least one 3D model (22) of a personalized corrective dental splint includes the addition to said 3D model of elements intended to correct dental and / or bone malpositions.

8. Custom corrective dental splint (30) for correcting the oral-dental system of a patient, characterized in that it is manufactured using the process according to one of the preceding claims.

9. Product computer program, recorded on a data carrier (12), and comprising program code which is designed to, when executed by a computer, implement the method according to any one of claims 1 to 8.

10. Data carrier (12) on which the computer program according to the preceding claim is recorded.