Manufacturing process of false tooth plaster mold, false tooth and manufacturing process of false tooth

Abstract

The invention discloses a manufacturing process of a false tooth plaster mold, a false tooth and a manufacturing process thereof.The manufacturing process of the false tooth plaster mold is used for manufacturing a plaster model of the false tooth and comprises the following steps that a false tooth pouring mold is provided, and a cavity of the false tooth pouring mold is used for forming the plaster model of the false tooth; the part, corresponding to the tooth top and / or the deep groove area of the false tooth, of the cavity is brushed with gypsum slurry; filling the cavity with gypsum slurry; and waiting for solidification of the gypsum slurry to obtain the gypsum model. According to the scheme, the flowing and attaching effects of the gypsum slurry in the detail areas are improved through the brushing technology, the technical problem that bubbles are likely to be generated in the gypsum slurry pouring process is solved through the method of filling the detail areas in advance, and therefore the risk that the details of the gypsum model are lost is reduced, and the quality and precision of the finished gypsum model are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dental modeling, in particular to a process for manufacturing a denture plaster mold, a denture and a process for manufacturing the same. BACKGROUND

[0002] As an important medical product for oral repair, dentures are widely used in the repair treatment of patients with missing teeth. In the process of manufacturing dentures, it is usually necessary to customize denture products that are highly matched with the actual morphology of the patient's oral cavity and teeth. In order to achieve personalized customization, the manufacturing of a denture plaster model becomes a key step in the entire process, and its quality directly affects the adaptability and use effect of the subsequent denture.

[0003] In the prior art, the manufacturing of a denture plaster model generally includes at least the following two steps: first, a doctor will take a mold in the patient's oral cavity using impression material to obtain an impression reflecting the structure of the patient's oral cavity and teeth; then, plaster slurry is injected into the impression, and after solidification, the mold is removed, thereby obtaining a plaster model consistent with the shape of the patient's teeth. The plaster model not only reflects the morphology of the patient's oral cavity, but also serves as the basis for subsequent denture processing and fitting.

[0004] However, due to the complex structure of teeth, the presence of a large number of concave-convex surfaces, deep grooves and sharp parts, combined with the poor flowability of plaster slurry, air bubbles are extremely easy to occur during the injection of the impression. Once these air bubbles form on the surface or inside the model, they not only affect the precision and strength of the plaster model, but also can cause details to be missing and the model to be damaged, thereby resulting in a high scrap rate, serious material waste, and even affecting the fitting effect of the subsequent denture. Therefore, how to effectively improve the forming quality of the plaster model and reduce the generation of air bubbles has become a technical problem that needs to be solved in the field of denture plaster mold manufacturing. SUMMARY

[0005] One object of the present application is a process for manufacturing a denture plaster mold, a denture and a process for manufacturing the same, which aims to solve the technical problem of poor forming quality of the denture plaster model in the prior art.

[0006] To achieve the above-mentioned object, in a first aspect, the present application provides a process for manufacturing a denture plaster mold for manufacturing a plaster model of a denture, comprising the following steps: providing a denture casting mold, the cavity of the denture casting mold being used to form a plaster model of a denture; brushing plaster slurry on the part of the cavity corresponding to the tooth tip and / or deep groove area of the denture; filling the cavity with plaster slurry; and waiting for the plaster slurry to solidify to obtain the plaster model.

[0007] The manufacturing process of the denture plaster mold provided by the present application first brushes the gypsum slurry in the cavity of the denture pouring mold in detail for the tooth tip and other detail areas, then fills the cavity with gypsum slurry as a whole, and obtains the gypsum model of the denture after solidification. The pre-brushing process can make the gypsum slurry more fully cover and penetrate into the complex detail parts in the cavity, especially the tooth tip, deep groove and other areas with dramatic shape changes and narrow structures, effectively improving the shape integrity and local structure fineness of the gypsum model.

[0008] Compared with the technical solution of directly filling gypsum slurry as a whole in the prior art, the present application improves the flow and fitting effect of the gypsum slurry in the detail area through the brushing process, avoids the technical problem of air bubbles easily generated in the process of pouring the gypsum slurry by pre-filling the detail area, thereby reducing the risk of missing details of the gypsum model, improving the quality and precision of the finished gypsum model, and further providing a reliable foundation for the accurate manufacturing and adaptation of the subsequent denture.

[0009] In combination with the first aspect, according to an embodiment of the present application, the filling of the cavity with the gypsum slurry comprises: causing the gypsum slurry to flow into the cavity from the highest point of the denture pouring mold until the cavity is completely filled.

[0010] In the present embodiment, by causing the gypsum slurry to flow into the cavity from the highest point of the denture pouring mold, the effect of wall-adhesion flow and step-by-step filling of the gypsum slurry is achieved, which helps the gas in the cavity to naturally rise and discharge along the flow direction, avoids the air bubbles being trapped inside by the gypsum slurry covering the bottom at one time, thereby further reducing the air bubble defects inside and on the surface of the model, and improving the forming quality and density of the gypsum model.

[0011] In combination with the first aspect, according to an embodiment of the present application, the filling of the cavity with the gypsum slurry comprises: keeping stirring the gypsum slurry while introducing and filling the gypsum slurry into the cavity.

[0012] In combination with the first aspect, according to an embodiment of the present application, after the filling of the cavity with the gypsum slurry, the method further comprises: using a probe to guide out the air bubbles adhering to the wall surface of the cavity.

[0013] In combination with the first aspect, according to an embodiment of the present application, before the gypsum slurry is allowed to solidify to obtain the gypsum model, the method further comprises: vibrating the denture pouring mold; and / or performing a decompression operation on the gypsum slurry in the denture pouring mold.

[0014] In combination with the first aspect, according to an embodiment of the present application, after the gypsum slurry is allowed to solidify to obtain the gypsum model, the method further comprises: checking the surface finish of the gypsum model; and if there are air holes on the surface of the gypsum model, filling the air holes.

[0015] In combination with the first aspect, according to an embodiment of the present application, the providing the denture casting mold comprises: pressing the impression material against the oral cavity of the patient to obtain an impression reflecting the dentition of the patient; and preparing the denture casting mold based on the impression.

[0016] In combination with the first aspect, according to an embodiment of the present application, the pressing the impression material against the teeth of the patient to obtain an impression reflecting the dentition of the patient comprises: pressing the impression material against the oral cavity of the patient to obtain a primary impression reflecting the morphology of the oral cavity of the patient; preparing a tray based on the primary impression; and pressing the impression material against the teeth of the patient using the tray to obtain an impression reflecting the dentition of the patient.

[0017] In the second aspect, the present application further provides a denture manufacturing process, wherein the denture is manufactured by using the denture plaster mold manufactured by the manufacturing process according to any of the embodiments.

[0018] In the third aspect, the present application further provides a denture manufactured by using the denture manufacturing process.

[0019] The beneficial effects of the above second and third aspects can refer to the first aspect or any of the possible implementation manners of the first aspect, and will not be described here. Based on the implementation manners of the above aspects, the present application can be further combined to provide more implementation manners.

[0020] Other advantages, objects, and features of the present application will be made apparent by the following description, and will be understood by those skilled in the art. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some of the embodiments of the present application, and those skilled in the art can obtain other drawings according to the structures shown in these drawings without any creative labor.

[0022] Figure 1 is one of the process flow diagrams of the manufacturing process of the denture plaster mold provided by the embodiments of the present application; Figure 2 is another process flow diagram of the manufacturing process of the denture plaster mold provided by the embodiments of the present application; Figure 3 is a third process flow diagram of the manufacturing process of the denture plaster mold provided by the embodiments of the present application; Figure 4 is a fourth process flow diagram of the manufacturing process of the denture plaster mold provided by the embodiments of the present application; Figure 5is a fifth flowchart of a process for manufacturing a denture plaster mold according to an embodiment of the present application; Figure 6 is a sixth flowchart of a process for manufacturing a denture plaster mold according to an embodiment of the present application; Figure 7 is a seventh flowchart of a process for manufacturing a denture plaster mold according to an embodiment of the present application; Figure 8 is an eighth flowchart of a process for manufacturing a denture plaster mold according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0024] Before introducing the embodiments of the present application, the technical terms involved in the present application are introduced.

[0025] Denture plaster model: the denture plaster model is a three-dimensional positive structure formed by pouring plaster slurry into the tooth-shaped pouring mold obtained, and solidifying. The model restores the tooth and tissue morphology in the patient's oral cavity, and is the basis for denture prosthesis design, denture manufacturing, and fitting analysis. Subsequently, the dentist will perform denture design, tooth arrangement, and try-on on the plaster model, until the final denture is manufactured and adjusted.

[0026] Impression: the impression refers to a negative transfer model obtained by using a tray and impression material to form in the patient's oral cavity. The impression can finely reproduce the small structural details of the patient's teeth and related soft and hard tissues, and provide accurate spatial morphology data for the preparation of the final denture plaster model.

[0027] Primary impression: the primary impression refers to the first plaster model obtained by pouring plaster material after the patient's oral cavity is initially modeled using a general tray and impression material, or a negative model directly obtained by modeling. The primary impression can accurately reflect the basic morphological structure of the patient's oral cavity, such as the upper jaw and alveolar ridge. Through analysis of the primary impression, the specific anatomical features of the patient's oral cavity can be further obtained, thereby guiding the manufacturing of a personalized tray that is more in line with the shape of the patient's individual oral cavity.

[0028] Tray: Tray generally refers to a tool used to carry and shape the impression material during the oral impression process. According to its manufacturing method and applicability, it can be divided into two categories: general tray and personalized tray. The general tray is pre-fabricated according to the standard of common oral morphology, and has multiple specifications and sizes, which is suitable for the preliminary impression of most patients. Using the general tray can quickly obtain the preliminary impression of the oral cavity, and then make the primary model. The personalized tray is made according to the actual oral structure of the patient after obtaining the primary model. The personalized tray can better fit the specific morphology of the patient's oral cavity, so that the impression material can more evenly and accurately cover the target area during the impression process.

[0029] Before introducing the embodiments of the present application, the related technologies involved in the present application are introduced first.

[0030] Gypsum model is an important carrier indispensable in the process of oral repair and denture production. Its preparation method is usually as follows: first, the accurate impression of the teeth and related tissues in the patient's oral cavity is obtained by using the tray and impression material, then the gypsum slurry is poured into the impression, and after it is solidified, the tooth gypsum model with high restoration of the patient's oral cavity shape can be obtained. As an important basis for denture design, production and adaptation, the model requires a smooth surface and clear structural details to ensure the accurate operation of subsequent processes.

[0031] However, due to the limitations of the flowability of the gypsum slurry, the filling method and the complexity of the structure of the tooth model itself, such as the small parts of the tooth gap, tooth tip and sulcus, air bubbles are easily formed on the surface of the model during the gypsum pouring and solidification process. These air bubbles not only affect the surface quality of the model, but also may cause the loss of key anatomical structures, thereby affecting the accurate production of dentures and the clinical adaptation effect. Therefore, how to reduce the generation of air bubbles and obtain high-quality gypsum model is a technical problem that needs to be solved in the current oral repair field.

[0032] In the first aspect, in order to solve the above technical problems, the present application provides a production process of a denture gypsum mold for producing a gypsum model of a denture. Please refer to Figure 1 The production process of the denture gypsum mold includes the following steps: S101, providing a denture pouring mold, the cavity of the denture pouring mold is used for forming a gypsum model of a denture.

[0033] The denture pouring mold mentioned in the present application can be used for forming a single tooth, or for forming a plurality of continuous teeth in a certain area of the oral cavity; the gypsum model of the denture can be a preliminary model for adjusting the mold, or a gypsum final model for flipping the mold to obtain the denture.

[0034] S103, brushing the gypsum slurry on the part of the cavity corresponding to the tooth tip and / or deep sulcus area of the denture.

[0035] Gypsum slurry should be understood as a liquid slurry for forming a gypsum model, usually a thick suspension with a certain fluidity formed after gypsum powder and an appropriate amount of water are uniformly mixed. A common method for preparing gypsum slurry is to weigh the appropriate proportion of gypsum powder, slowly pour it into water and stir thoroughly until there are no obvious particles and the slurry is fine and uniform, then the gypsum slurry for dental model making can be obtained.

[0036] For example, the brushing operation can use a brush, a micro plastic brush or other tools to dip an appropriate amount of prepared gypsum slurry and perform point brushing on the corresponding denture tip and / or deep groove area of the pouring mold cavity, so that the gypsum slurry is fully coated on these parts prone to air bubbles or insufficient filling. It should be noted that the brushed gypsum slurry should be evenly attached to the cavity wall of the denture pouring mold without air bubbles. The brushing operation should be completed before the gypsum slurry loses fluidity to ensure that the slurry can fully penetrate and cover the target area.

[0037] S105, filling the cavity with gypsum slurry.

[0038] Specifically, step S105 can be performed immediately after brushing the tip and / or deep groove area, or it can be performed after the brushed gypsum slurry is initially solidified. The judgment standard for the initial solidification of the brushed layer is that when the surface of the brushed area is lightly touched with a silica gel rod, the gypsum slurry is slightly indented but not sticky to the rod, but the interior still maintains a certain degree of moisture and can combine with the subsequent gypsum slurry. At this time, the details of the brushed layer can be ensured, and the brushed layer can be firmly combined with the gypsum slurry filled as a whole.

[0039] S107, waiting for the gypsum slurry to solidify to obtain a gypsum model.

[0040] The production process of the denture gypsum mold provided in the present application first brushes the gypsum slurry in the cavity of the denture pouring mold for the detailed area such as the tip, and then fills the cavity with gypsum slurry as a whole, and waits for the gypsum model of the denture to be solidified and formed. This pre-brushed slurry process can make the gypsum slurry more fully cover and penetrate into the complex detailed parts in the cavity, especially the tip, deep groove and other areas with dramatic changes in shape and narrow structure, effectively improving the shape integrity and local structure fineness of the gypsum model.

[0041] Compared with the technical solution of directly filling the gypsum slurry as a whole in the prior art, the present application improves the flow and fitting effect of the gypsum slurry in the detailed area through the brushing process, avoids the technical problem of air bubbles easily generated during pouring of the gypsum slurry by pre-filling the detailed area, thereby reducing the risk of missing details of the gypsum model, improving the quality and precision of the finished gypsum model, and further providing a reliable foundation for accurate production and adaptation of the subsequent denture.

[0042] Please refer to Figure 2, in combination with the first aspect, according to an embodiment of the present application, the “filling the mold cavity with gypsum slurry” is further specified as: B201, flowing the gypsum slurry from the highest point of the denture casting mold into the mold cavity until the mold cavity is completely filled.

[0043] In the present embodiment, by selecting to introduce the gypsum slurry from the highest point of the denture casting mold, the gypsum slurry is allowed to flow along the wall of the mold cavity, achieving the effect of wall-adhering flow and layer-by-layer filling. This flow method not only helps the gypsum slurry better cover the details of the mold cavity during layer-by-layer filling, but also guides the air in the mold cavity to naturally rise and smoothly escape along the flow direction of the gypsum slurry, reducing the risk of model defects caused by air bubbles being trapped. Compared with direct and rapid pouring or one-time large-area filling, this method can effectively avoid the gypsum slurry suddenly covering the bottom of the mold cavity, preventing air bubbles from being trapped inside, and helping to obtain a high-quality gypsum model with a smooth surface and a dense structure.

[0044] Further, those skilled in the art can flexibly adjust the specific injection method of the gypsum slurry according to work experience. For example, in actual operation, the following specific flow methods can be used to improve the filling effect: for example, the operator can place the pouring tool, such as a measuring cup or a slurry nozzle of a slurry injector, against the highest point of the mold cavity wall, slowly pour the pouring tool, and let the gypsum slurry flow naturally along the wall to reduce air bubble entrainment and impact agitation; or, with the help of a drainage rod or a stirring rod, the rod is first inserted into the deep part of the mold cavity, the gypsum slurry is slowly poured while the drainage rod is slowly withdrawn, and the gypsum slurry flows into the bottom of the mold cavity first, and then gradually backfills the entire mold cavity. These methods can help the gypsum slurry to be uniformly filled and the gas to be smoothly discharged, further improving the forming precision and density of the gypsum model.

[0045] Please refer to Figure 3 , in combination with the first aspect, according to an embodiment of the present application, the “filling the mold cavity with gypsum slurry” is further specified as: B301, while maintaining stirring of the gypsum slurry, introducing and filling the gypsum slurry into the mold cavity.

[0046] In conventional operations, gypsum slurry is generally mixed by mixing gypsum powder and water in a certain proportion, and then poured into the mold cavity for filling. However, the gypsum particles in the gypsum slurry body may settle due to gravity during preparation for pouring, resulting in uneven distribution of the gypsum slurry, with a thin upper layer and a dense lower layer. This uneven sedimentation can affect the density and surface quality of the final gypsum model, and may even form small pores or layering defects in the model.

[0047] In the process of introducing the gypsum slurry into the cavity, the gypsum slurry is continuously stirred. Through continuous stirring, the gypsum powder and water can be fully mixed, the uniformity and fluidity of the gypsum slurry can be maintained, and the risk of sedimentation and stratification of gypsum particles can be reduced. In this way, not only the overall density and strength of the gypsum model can be improved, but also the restoration degree and smoothness of the surface details can be effectively improved, the defect rate of the model surface and the inside can be reduced, and thus the forming quality of the gypsum model can be significantly improved.

[0048] In specific implementation, various ways can be adopted to achieve the above effects. For example, an automatic grouting device with stirring function can be used to continuously stir the gypsum slurry while the gypsum slurry flows into the cavity; or an operator holds a stirring rod to continuously stir the slurry during the pouring of the gypsum slurry, so that the slurry always maintains a uniform state; or a small stirring blade or stirring screw rod can be installed at the outlet flow channel of the grouting tool, so that the gypsum slurry is stirred again before flowing out. These specific implementations can effectively prevent the gypsum slurry from being unevenly deposited and improve the quality and consistency of the final gypsum model.

[0049] Please refer to Figure 4 , in combination with the first aspect, according to an embodiment of the present application, after "filling the cavity with the gypsum slurry", further comprising: B401, using a probe to guide the bubbles adhering to the cavity wall.

[0050] During the process of filling the cavity with the gypsum slurry, due to the surface tension between the gypsum slurry and the cavity wall, bubbles are easily trapped on the wall, especially in the recessed, cornered or rough surface areas of the cavity. Surface tension will cause the bubbles to adhere to the cavity wall, hindering the natural upward floating and removal of the bubbles. If these bubbles adhering to the wall cannot be removed in time, they will eventually solidify inside or on the surface of the gypsum model, affecting the density and surface precision of the model - this is one of the main causes of air holes in the gypsum model.

[0051] After the gypsum slurry fills the cavity, the technical solution uses a probe or other tool to actively guide the bubbles adhering to the wall. Through the physical disturbance of the probe, the gas-solid interface and surface tension between the bubbles and the wall can be effectively destroyed, so that the bubbles are detached from the wall and float to the surface of the gypsum slurry to be removed. In this way, the air hole defects on the surface of the gypsum model can be significantly reduced, and the overall forming quality and surface smoothness of the gypsum model can be improved.

[0052] In actual operation, the exemplary gradually moves slowly from the lower region of the cavity, and guides the bubbles along the wall to the surface of the slurry. In this way, even if the lower layer of bubbles is adhered again after being brought to the upper layer during the guiding process, it can be finally brought out by the continuous probe operation. In order to facilitate the observation of the distribution and discharge of the bubbles, the denture casting mold can also be made of transparent materials, such as polycarbonate, polymethyl methacrylate, and other transparent high polymer materials. Through the above method, the forming effect of the plaster model can be further optimized, and the generation of defects can be reduced.

[0053] Please refer to Figure 5 , in combination with the first aspect, according to an embodiment of the present application, before "waiting for the gypsum slurry to solidify to obtain a gypsum model", further comprising: B501, vibrating the denture casting mold; and / or B501, performing a decompression operation on the gypsum slurry in the denture casting mold.

[0054] In one of the steps of the present embodiment, by applying vibration to the casting mold, the bubbles inside the gypsum slurry can overcome the constraint of surface tension under the action of gypsum slurry inertia and separate from the cavity wall, and then float to the surface of the slurry and be discharged. Moreover, the vibration of the denture casting mold and the gypsum slurry contained therein not only helps the aggregation and migration of small bubbles, but also makes the gypsum slurry flow better and fill all the fine parts, thereby reducing the probability of bubble residue and improving the detail restoration effect of the model.

[0055] In another step of the present embodiment, by performing a decompression operation on the gypsum slurry in the denture casting mold, the same effect of promoting bubble discharge can be achieved. Specifically, by placing the casting mold after slurry injection in a decompression or even vacuum environment, the bubbles in the gypsum slurry will expand in volume due to the decrease in external pressure, and will be subjected to greater buoyancy and then float and eventually escape the surface of the slurry. The decompression operation can significantly accelerate the discharge efficiency of the bubbles, especially for the tiny bubbles that are difficult to detect with the naked eye, thereby significantly improving the density and mechanical strength of the gypsum model and reducing the structural defects caused by bubbles.

[0056] The above-mentioned vibration and decompression operations can be performed alone or in combination to achieve better bubble discharge effect, and the above-mentioned two operation processes also have good compatibility with the technical solutions of using a probe to discharge bubbles. Regardless of which way, it aims to enhance the migration and discharge of bubbles through physical means, and finally obtain a dense, uniform, and smooth surface high-quality gypsum model, which provides a good foundation for the subsequent processing and use of precise parts such as dentures.

[0057] Please refer to Figure 6 , in combination with the first aspect, according to an embodiment of the present application, after "waiting for the gypsum slurry to solidify to obtain a gypsum model", further comprising: B601, check the surface smoothness of the plaster model; B603, if there are air holes on the surface of the plaster model, fill the air holes.

[0058] After the plaster slurry is completely solidified and the plaster model is obtained, the surface of the plaster model is checked to ensure that the surface smoothness meets the requirements of denture production. By carefully checking the surface of the plaster model, air holes or defects that are caused by incomplete removal of air bubbles in the early stage can be found in time, and timely treatment of these defects helps to ensure the accuracy and aesthetics of the subsequent denture forming, and also helps to remedy the unqualified products of the plaster model and improve the yield of the denture plaster mold.

[0059] If air holes are found on the surface of the plaster model during the inspection process, appropriate filling materials can be selected to repair the air holes according to the actual situation. For example, dental wax, repair plaster, light-cured resin and other materials can be used to fill the air holes, and then the surface is properly trimmed and polished to restore the smoothness of the surface. This not only ensures the integrity and surface quality of the plaster model, but also provides a reliable foundation for further processing and fitting of the denture.

[0060] Please refer to Figure 7 , in combination with the first aspect, according to an embodiment of the present application, "providing a denture casting mold" includes: B701, pressing the impression material into the patient's mouth to obtain an impression reflecting the patient's tooth shape; B703, preparing a denture casting mold based on the impression.

[0061] This embodiment gives a way to obtain a denture plaster mold: by pressing the impression material into the patient's mouth to obtain an impression that highly restores the shape of the patient's teeth and related oral tissues. Then, a denture casting mold is further prepared based on the impression.

[0062] Through the above steps, the geometric shape of the denture casting mold can be effectively ensured to highly match the actual structure of the patient's mouth, reducing errors caused by impression distortion or improper casting mold preparation, which is beneficial to the high-precision forming of the plaster model and the accurate production of the denture restoration.

[0063] The impression, as a key intermediate product in the denture production process, its accuracy directly affects the accuracy of the subsequent plaster model and denture restoration. Using appropriate impression material and ensuring its full adhesion and solidification in the mouth can help to accurately reproduce the edge, groove, and tooth tip of the tooth, laying a solid foundation for the fine forming of the plaster model and the accurate fitting of the denture. For example, common impression materials include silicone rubber, alginate, etc., which not only have good fluidity and detail restoration ability, but also are easy to demold and clean, which helps to improve the efficiency and quality of the entire denture production process.

[0064] The denture casting mold is generally made of a material with good dimensional stability, chemical inertness and easy operation to ensure that it can completely bear the oral cavity negative structure reflected by the impression and is not easy to deform in subsequent operations. For example, commonly used denture casting mold materials include high-strength silicone rubber, polyether material, polyvinyl alcohol, and polyurethane, etc. These materials not only can accurately reproduce the impression details, but also are not easy to chemically react with plaster and are not easy to shrink or expand in size due to moisture or temperature changes during the casting and model disassembly process of the plaster slurry. In particular, silicone rubber materials are widely used in the field of high-precision denture model preparation due to their excellent elasticity and resilience, which facilitate the complete demolding of the plaster model.

[0065] In addition, in the actual preparation process, according to the anatomical characteristics of the patient's oral cavity and the specific needs of the denture repair, flexible partition reverse modeling, personalized trays and other methods can be used. For example, for multiple teeth or complex dentition areas, a partition reverse modeling method can be used to prepare local models to facilitate subsequent denture tooth arrangement and fitting operations; for patients with irregular dentition or large differences in soft and hard tissue, a personalized tray can be customized based on the preliminary model to make the distribution of the impression material in the oral cavity more uniform, further improving the accuracy and adaptability of the impression and the final plaster model.

[0066] Please refer to Figure 8 Furthermore, in order to more accurately reflect the actual tooth shape of the patient, "pressing the impression material against the teeth of the patient to obtain an impression reflecting the tooth shape of the patient" includes: B801, pressing the impression material against the oral cavity of the patient to obtain a preliminary model reflecting the oral cavity shape of the patient; B803, making a tray based on the preliminary model; B805, using the tray to press the impression material against the teeth of the patient to obtain an impression reflecting the tooth shape of the patient.

[0067] Because there are obvious differences in tooth shape between different patients, and the overall structure of the oral cavity also has significant individual characteristics, such as the width and depth of the palate, the alveolar ridge, and the palate, if a general tray is used directly for impression operation, it is often difficult for the impression material to fully and uniformly cover all target areas, and phenomena such as impression edge lifting, local compression or insufficient coverage may occur, which may affect the accuracy and adaptability of the final denture model.

[0068] Therefore, in this embodiment, the impression making is divided into multiple times to improve the accuracy and adaptability of the impression operation. Specifically, first, by pressing the impression material against the oral cavity of the patient, a preliminary model reflecting the overall shape of the patient's oral cavity is obtained. This preliminary model can accurately describe the basic anatomical structures of the patient's palate, alveolar ridge, and oral soft tissue, serving as the basis for subsequent tray customization.

[0069] Subsequently, the tray is made based on the obtained primary mold. Exemplarily, the customization of the tray is usually made on the surface of the primary mold using a material such as a thermoplastic resin, a light-cured resin, etc., and after curing, a personalized tray that is more consistent with the oral cavity of the patient is obtained, which provides stable support for the subsequent reasonable distribution and setting of the impression material.

[0070] Finally, the impression material is again pressed against the teeth and the related oral cavity area of the patient using the customized tray, so as to obtain a precise impression that highly restores the state of the teeth and the soft and hard tissues of the oral cavity of the patient. Especially in patients with irregular dentition, special oral cavity morphology or obvious differences in soft and hard tissues, the edge adaptability and detail restoration degree of the impression can be significantly improved, which provides a basis for the precise manufacturing and clinical fitting of the denture, and helps to improve the success rate of the denture repair of complex cases and patients with special anatomical structures.

[0071] In a second aspect, to solve the above technical problem, the application further provides a denture manufacturing process, and the denture is made by using the denture plaster mold reverse molding process.

[0072] In a third aspect, to solve the above technical problem, the application further provides a denture, which is made by using the above denture manufacturing process.

[0073] Since the denture plaster mold manufacturing process provided by the application can obtain a denture plaster mold with good surface quality and no pores, the denture made by using the denture plaster mold reverse molding process also has the corresponding technical effects. The beneficial effects of the above second aspect and third aspect can be referred to the first aspect or any possible implementation manner in the first aspect, and here, no more description is given.

[0074] On the basis of the implementation manners of the above aspects, the application can be further combined to provide more implementation manners.

[0075] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the posture changes, the directional indications also change accordingly.

[0076] It should also be noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or can also have a centering element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or can also be indirectly connected to the other element through a centering element.

[0077] The above merely describes the preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made according to the content of the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A process for making a denture plaster mold for making a plaster model of a denture, characterized in that, The method comprises the following steps: providing a denture casting mold, a cavity of which is used to form a plaster model of a denture; applying plaster paste to the cavity corresponding to the denture cusp and / or deep groove area; filling the cavity with plaster paste; waiting for the plaster paste to solidify to obtain the plaster model.

2. The process for making a denture plaster model according to claim 1, characterized in that, The step of filling the cavity with plaster paste comprises: causing the plaster paste to flow into the cavity from the highest point of the denture casting mold until the cavity is completely filled.

3. The process for making a denture plaster model according to claim 1, characterized in that, The step of filling the cavity with plaster paste comprises: while keeping the plaster paste stirred, introducing and filling the cavity with the plaster paste.

4. The process for making a denture plaster model according to claim 1, characterized in that, The step of filling the cavity with plaster paste further comprises: using a probe to remove bubbles adhering to the cavity wall.

5. The process for making a denture plaster model according to claim 1, wherein The step of waiting for the plaster paste to solidify to obtain the plaster model further comprises: vibrating the denture casting mold; and / or performing a decompression operation on the plaster paste in the denture casting mold.

6. The process for making a denture plaster model according to claim 1, wherein The step of waiting for the plaster paste to solidify to obtain the plaster model further comprises: checking the surface finish of the plaster model; if there are air holes on the surface of the plaster model, filling the air holes.

7. The process for making a denture plaster model according to claim 1, wherein The step of providing a denture casting mold comprises: pressing impression material against the patient's mouth to obtain an impression reflecting the patient's tooth shape; based on the impression, preparing the denture casting mold.

8. The process for making a denture plaster model according to claim 7, characterized in that, The step of pressing impression material against the patient's teeth to obtain an impression reflecting the patient's tooth shape comprises: pressing impression material against the patient's mouth to obtain a primary impression reflecting the patient's mouth shape; based on the primary impression, making a tray; using the tray to press impression material against the patient's teeth to obtain an impression reflecting the patient's tooth shape.

9. A denture fabrication process, characterized by, The denture is made by using the plaster model made by the method of any one of claims 1-8 as a mold.

10. A denture, characterized by The method of claim 9 is used to make a denture.

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