Digitalized design and manufacturing method for removable denture by using TSP technology
Through the digital design and forming method of TSP technology, the foreign body sense, retention difficulties and deformation problems of movable dentures during wearing and using are solved, which improves accuracy and comfort, extends service life, and simplifies the production process.
Patent Information
- Application Number
- CN202510092366.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-03-18
AI Technical Summary
The existing movable dentures have problems such as foreign body sense, difficulty in retention, looseness, displacement and deformation during wearing and using. The production process is complicated and the doctor's technical requirements are high, resulting in limited service life and large differences in production results.
Using TSP technology, digital design is carried out through CAD scanning and iPD design software to generate a three-dimensional model, and the bracket is formed using nozzle extrusion, laser sintering and curing technology, and annealing, grinding and polishing are carried out to form a base of an independent grid structure to avoid shrinkage and deformation caused by excessive resin.
Improves the accuracy and wear comfort of moving dentures, avoids deformation problems, extends service life, and reduces the complexity of production and doctor's technical requirements.
Smart Images
Figure CN119632704A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of design and production of removable dentures, and in particular to a digital design and production method of removable dentures using TSP technology. Background Art
[0002] Removable dentures consist of two parts: artificial teeth and base. The dentures are adsorbed on the maxillary and mandibular alveolar ridges by the adsorption force and atmospheric pressure generated by the close fit between the denture base and the edentulous jaw mucosal tissue and the edge closure, thereby restoring the patient's defective tissue and facial appearance, and restoring chewing and pronunciation functions. The mucoperiosteum and bone tissue covered by the denture base bear the occlusal pressure of the denture.
[0003] When wearing them, patients will have a noticeable foreign body sensation and need a long time to adapt. In addition, it is relatively difficult to retain removable dentures. They are prone to loosening and displacement during oral activities such as talking and chewing, which affects their use. Moreover, removable dentures may deform during use, resulting in a limited service life for removable dentures, which require regular replacement. In addition, the current production process of removable dentures is relatively complicated, requiring high experience and technical skills from doctors, and the results produced by different doctors may vary. Summary of the invention
[0004] In response to the above problems, the present invention provides a digital design and production method for removable dentures using TSP technology, which not only makes the prepared removable dentures more precise and improves the wearing comfort of patients, but also effectively avoids the deformation problem of removable dentures and increases the service life of removable dentures.
[0005] To achieve the above object, the technical solution of the present invention is: A method for digitally designing and manufacturing removable dentures using TSP technology comprises the following steps: S1, CAD scanning, using an oral scanner to scan the inside of the oral cavity, obtain three-dimensional data of the internal oral tissue, and generate a three-dimensional model of the inside of the oral cavity; S2, CAD design, using iPD design software to analyze the three-dimensional model of the oral cavity, determine the orientation of the denture in the mouth, observe the concave of the soft tissue in the oral cavity, perform buffering on the hard area of the mucosa, determine the position of the artificial teeth and the internal shoulder according to the gum condition, and then draw the mesh connector. After the mesh connector is drawn, draw the large connector, which has inverted cones arranged at intervals. Finally, draw the plastic-metal junction line to form a polished surface to complete the design of the three-dimensional model of the bracket; S3, layout of the bracket, setting the support structure and layout the bracket; S4, CAM molding, generating the stent through nozzle extrusion, laser sintering and curing according to the data of the designed stent three-dimensional model; S5, annealing treatment, annealing the bracket formed by CAM to prevent deformation during subsequent use; S6, removing support, removing the support structure used for bracket generation; S7. Polishing of the bracket: first use a sand sheet or tungsten steel grinding head to remove the remaining support structure, then use a diamond grinding head to trim the edge and shape of the bracket, and then put the oral bracket into a plasma polishing machine for polishing and grinding to improve the surface quality of the bracket; S8, tooth arrangement waxing, arranging the artificial teeth on the bracket, and filling wax between the artificial teeth and the bracket, fixing the artificial teeth at a predetermined position, and filling wax to form a wax base; S9. Molding of the base: Place the model formed by the bracket, artificial teeth and wax base on the working model, and then use the mold box and plaster to complete the production of the base, thereby completing the production of the denture.
[0006] As a further solution of the present invention: in step S2, the mesh connector overlaps the edge of the large connector by 1-2 mm, the thickness of the large connector is designed to be 0.6 mm, the bottom surface of the inverted cone is a square, designed on the tissue surface of the large connector, the spacing between the squares is 1.1 mm, the side length of the square is 1 mm, the height of the inverted cone is 0.35 mm, the top corner of the inverted cone is placed inside the large connector, and a grid is formed between the bottom surfaces of the several inverted cones and the intervals between the bottom surfaces, and the grid forms an overall coverage on the tissue surface of the large connector.
[0007] As a further solution of the present invention: a groove is provided on the large connector, and the groove is a trapezoidal shape that is narrow at the top and wide at the bottom. The algorithm is set by the IPD design software to automatically calculate the groove width, and the groove bottom width is 0.1 mm greater than the groove width.
[0008] As a further solution of the present invention: in step S3, the layout angle of the support is 45°, and the arrangement of the support structure cannot affect the formation of the grid on the large connecting tissue surface.
[0009] As a further solution of the present invention: in step S7, during the polishing of the stent, the front and back surfaces of the stent are polished in a plasma polisher, and the front and back surfaces are polished for 5 to 8 minutes respectively, and then the pattern on the surface of the stent is polished with a ball drill, and the macroconnector tissue surface is not polished to ensure the integrity of the grid on the macroconnector tissue surface.
[0010] As a further solution of the present invention: in step S9, the molding process of the base includes the following steps: S91. Preliminary inspection: check whether the bracket and wax base are neat and whether they fit tightly with the working model; check whether the edges of the bracket and wax base are round and blunt and whether they are well sealed; check whether there is residual wax on the surface of the artificial teeth and whether the bite-jaw relationship is good; check whether the posterior bank area of the model is closed; S92, trimming the working model and placing it in a mold box, trimming the height of the working model with a wet grinder, the height of the working model does not exceed 2 / 3 of the mold box; the mold box includes an upper mold box and a lower mold box, pouring the mixed gypsum into the lower mold box, the height of the gypsum in the lower mold box is located at 1 / 2 or 1 / 3 of the height of the lower mold box, and then pressing the working model into the gypsum of the lower mold box, so that the bracket and artificial teeth on the working model are all wrapped with gypsum, when the gypsum is close to solidification, remove the excess gypsum with a brush or a spatula under the condition of slow running water, so that the artificial teeth, wax base, and the edge of the lower mold box are fully exposed, and the surface of the remaining gypsum is required to be smooth without undercuts; S93, closing the upper mold box and the lower mold box, and after the gypsum inside the lower mold box is completely solidified, applying a release agent on the surface of the gypsum with a brush, and then closing the upper mold box and the lower mold box, wherein the edges of the upper mold box and the lower mold box are in close contact; S94, pouring plaster into the upper mold box, slowly pouring the prepared plaster into the upper mold box from one side and gently vibrating the upper mold box to expel the air in the upper mold box, until the prepared plaster fills the upper mold box, and then pressing the top cover tightly; S95, soak the mold box, and after the gypsum in the mold box is completely solidified, soak the mold box in hot water above 80°C for 3 to 5 minutes and then take it out; S96, separate the upper mold box from the lower mold box, gently pry the mold box to separate the upper mold box from the lower mold box, form a plaster cavity inside the mold box, rinse the remaining wax in the mold box with boiling water, and check whether the artificial teeth are lost or shifted; S97. Trim the edge of the plaster cavity, blow it clean with an air gun, and apply a release agent on the plaster surface; S98, blending resin, blending the dental tray powder and the monomer according to a proportion to form a resin; S99, press the resin into the bracket, take out the bracket, place it in the upper mold box, take an appropriate amount of the blended resin in the dough stage, knead it evenly by hand, and gently press it on the bracket tissue surface in the upper mold box to fill the grooves of the entire tissue surface; S910, base molding, and denture processing, the upper mold box and the lower mold box are pressed tightly, fixed on the pressure rack, and then placed in boiling water, kept for 25-30 minutes, taken out, placed at room temperature for 10-15 minutes, and then the upper mold box is separated from the lower mold box; use a small hammer to knock the movable plate at the bottom of the mold box to make the model fall out of the mold box, use plaster shears to trim the plaster and model around the denture, use an air chisel to remove the working model, grind and polish the base, and after polishing, use an ultrasonic cleaner to clean the polishing paste on the surface of the denture, and the movable denture is formed.
[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention improves the precision of removable dentures through digital methods, making the dentures fit better with the internal tissues of the oral cavity and improving the wearing comfort; 2. The present invention effectively avoids shrinkage and deformation caused by excessive thickness of the resin through independent grids on the tissue surface of the large connector, thereby increasing the service life of the removable denture. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is an overall flow chart of the method for digitally designing and manufacturing removable dentures using TSP technology of the present invention; Figure 2 It is a flow chart of the base molding process of the digital design and production method of removable dentures using TSP technology of the present invention; Figure 3 A schematic diagram of the structure of a mesh connector and a large connector in the method for digitally designing and manufacturing a removable denture using the TSP technology of the present invention; In the figure: 1. mesh connector; 2. large connector; 3. groove. DETAILED DESCRIPTION
[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0014] Example 1
[0015] refer to Figures 1 to 3 A method for digitally designing and manufacturing a removable denture using TSP technology comprises the following steps: S1, CAD scanning, using an oral scanner to scan the inside of the oral cavity, obtain three-dimensional data of the internal oral tissue, and generate a three-dimensional model of the inside of the oral cavity; S2, CAD design, using iPD design software to analyze the three-dimensional model of the oral cavity, determine the orientation of the denture in the mouth, observe the concave of the soft tissue in the oral cavity, perform buffering on the hard area of the mucosa, determine the position of the artificial tooth and the internal shoulder according to the gum condition, and then draw the mesh connector 1. After the mesh connector 1 is drawn, draw the large connector 2. The large connector 2 is designed with inverted cones arranged at intervals. Finally, draw the plastic-metal intersection line to form a polished surface to complete the design of the three-dimensional model of the bracket; S3, layout of the bracket, setting the support structure and layout the bracket; S4, CAM molding, generating the stent through nozzle extrusion, laser sintering and curing according to the data of the designed stent three-dimensional model; S5, annealing treatment, annealing the bracket formed by CAM to prevent deformation during subsequent use; S6, removing support, removing the support structure used for bracket generation; S7. Polishing of the bracket: first use a sand sheet or tungsten steel grinding head to remove the remaining support structure, then use a diamond grinding head to trim the edge and shape of the bracket, and then put the oral bracket into a plasma polishing machine for polishing and grinding to improve the surface quality of the bracket; S8, tooth arrangement waxing, arranging the artificial teeth on the bracket, and filling wax between the artificial teeth and the bracket, fixing the artificial teeth at a predetermined position, and filling wax to form a wax base; S9. Molding of the base: Place the model formed by the bracket, artificial teeth and wax base on the working model, and then use the mold box and plaster to complete the production of the base, thereby completing the production of the denture.
[0016] In step S2, the edges of the mesh connector 1 and the large connector 2 overlap by 1-2 mm, the thickness of the large connector 2 is designed to be 0.6 mm, the bottom surface of the inverted cone is a square, designed on the tissue surface of the large connector 2, the spacing between the squares is 1.1 mm, the side length of the square is 1 mm, the height of the inverted cone is 0.35 mm, the top corner of the inverted cone is placed inside the large connector, and a grid is formed between the bottom surfaces of several inverted cones and the intervals between the bottom surfaces. The grid forms an overall coverage on the tissue surface of the large connector, and the independent grid can avoid shrinkage deformation caused by excessive thickness of the resin in subsequent production.
[0017] A groove 3 is provided on the large connector 2. The groove 3 is a trapezoidal shape that is narrow at the top and wide at the bottom. The algorithm set by the IPD design software automatically calculates the notch width of the groove 3. The bottom width of the groove is 0.1 mm greater than the notch width, which enhances the stability of the groove 3 structure and enables better mechanical bonding between the large connector 2 and the resin.
[0018] In step S3, the layout angle of the support is 45°, and the setting of the support structure cannot affect the formation of the grid on the tissue surface of the large connection 2.
[0019] In step S7, during the polishing of the stent, the front and back surfaces of the stent are polished in a plasma polisher for 5 to 8 minutes each, and then the pattern on the surface of the stent is polished with a ball drill, while the tissue surface of the large connector 2 is not polished to ensure the integrity of the grid on the tissue surface of the large connector 2.
[0020] In step S9, the base forming process includes the following steps: S91. Preliminary inspection: check whether the bracket and wax base are neat and whether they fit tightly with the working model; check whether the edges of the bracket and wax base are round and blunt and whether they are well sealed; check whether there is residual wax on the surface of the artificial teeth and whether the bite-jaw relationship is good; check whether the posterior bank area of the model is closed; S92, trimming the working model and placing it in a mold box, trimming the height of the working model with a wet grinder, the height of the working model does not exceed 2 / 3 of the mold box; the mold box includes an upper mold box and a lower mold box, pouring the mixed gypsum into the lower mold box, the height of the gypsum in the lower mold box is located at 1 / 2 or 1 / 3 of the height of the lower mold box, and then pressing the working model into the gypsum of the lower mold box, so that the bracket and artificial teeth on the working model are all wrapped with gypsum, when the gypsum is close to solidification, under the condition of slow running water, use a brush or a spatula to remove excess gypsum, so that the artificial teeth, wax base, and the edge of the lower mold box are fully exposed, and the surface of the remaining gypsum is required to be smooth without undercuts; S93, closing the upper mold box and the lower mold box, and after the gypsum inside the lower mold box is completely solidified, applying a release agent on the surface of the gypsum with a brush, and then closing the upper mold box and the lower mold box, so that the edges of the upper mold box and the lower mold box are in close contact; S94, pouring plaster into the upper mold box, slowly pouring the prepared plaster into the upper mold box from one side and gently vibrating the upper mold box to expel the air in the upper mold box, until the prepared plaster fills the upper mold box, and then pressing the top cover tightly; S95, soak the mold box, and after the gypsum in the mold box is completely solidified, soak the mold box in hot water above 80°C for 3 to 5 minutes and then take it out; S96, separate the upper mold box from the lower mold box, gently pry the mold box to separate the upper mold box from the lower mold box, form a plaster cavity inside the mold box, rinse the remaining wax in the mold box with boiling water, and check whether the artificial teeth are lost or shifted; S97. Trim the edge of the plaster cavity, blow it clean with an air gun, and apply a release agent on the plaster surface; S98, blending resin, blending the dental tray powder and the monomer according to a proportion to form a resin; S99, press the resin into the bracket, take out the bracket, place it in the upper mold box, take an appropriate amount of the blended resin in the dough stage, knead it evenly by hand, and gently press it on the bracket tissue surface in the upper mold box to fill the grooves of the entire tissue surface; S910, base molding, and denture processing, the upper mold box and the lower mold box are pressed tightly, fixed on the pressure rack, and then placed in boiling water, kept for 25-30 minutes, taken out, placed at room temperature for 10-15 minutes, and then the upper mold box is separated from the lower mold box; use a small hammer to knock the movable plate at the bottom of the mold box to make the model fall out of the mold box, use plaster shears to trim the plaster and model around the denture, use an air chisel to remove the working model, grind and polish the base, and after polishing, use an ultrasonic cleaner to clean the polishing paste on the surface of the denture, and the movable denture is formed.
[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A method for digitally designing and manufacturing removable dentures using TSP technology, characterized in that: The following steps are involved: S1, CAD scanning, using an oral scanner to scan the inside of the oral cavity, obtain three-dimensional data of the internal oral tissue, and generate a three-dimensional model of the inside of the oral cavity; S2, CAD design, using iPD design software to analyze the three-dimensional model of the inside of the oral cavity, determine the orientation of the denture in the mouth, observe the concave of the soft tissue in the oral cavity, perform buffering on the hard area of the mucosa, determine the position of the artificial teeth and the internal shoulder according to the gum condition, and then draw the mesh connector. After the mesh connector is drawn, draw the large connector, which has inverted cones arranged at intervals. Finally, draw the plastic-metal junction line to form a polished surface to complete the design of the three-dimensional model of the bracket; S3, layout of the bracket, setting the support structure and layout the bracket; S4, CAM molding, generating the stent through nozzle extrusion, laser sintering and curing according to the data of the designed stent three-dimensional model; S5, annealing treatment, annealing the bracket formed by CAM to prevent deformation during subsequent use; S6, removing support, removing the support structure used for bracket generation; S7. Polishing of the bracket: first use a sand sheet or tungsten steel grinding head to remove the remaining support structure, then use a diamond grinding head to trim the edge and shape of the bracket, and then put the oral bracket into a plasma polishing machine for polishing and grinding to improve the surface quality of the bracket; S8, tooth arrangement waxing, arranging the artificial teeth on the bracket, and filling wax between the artificial teeth and the bracket, fixing the artificial teeth at a predetermined position, and filling wax to form a wax base; S9. Molding of the base: Place the model formed by the bracket, artificial teeth and wax base on the working model, and then use the mold box and plaster to complete the production of the base, thereby completing the production of the denture.
2. The method for digitally designing and producing removable dentures using TSP technology according to claim 1, characterized in that: In step S2, the mesh connector overlaps the edge of the large connector by 1-2 mm, the thickness of the large connector is designed to be 0.6 mm, the bottom surface of the inverted cone is a square, designed on the tissue surface of the large connector, the spacing between the squares is 1.1 mm, the side length of the square is 1 mm, the height of the inverted cone is 0.35 mm, the top corner of the inverted cone is placed inside the large connector, and a grid is formed between the bottom surfaces of the several inverted cones and the intervals between the bottom surfaces, and the grid forms an overall coverage on the tissue surface of the large connector.
3. The method for digitally designing and producing removable dentures using TSP technology according to claim 2 is characterized in that: The large connector is provided with a groove, which is a trapezoidal shape with a narrow top and a wide bottom. The groove width is automatically calculated by setting an algorithm in the IPD design software, and the groove bottom width is 0.1 mm greater than the groove width.
4. The method for digitally designing and producing removable dentures using TSP technology according to claim 3 is characterized in that: In step S3, the layout angle of the support is 45°, and the setting of the support structure cannot affect the formation of the grid on the large connecting tissue surface.
5. The method for digitally designing and producing removable dentures using TSP technology according to claim 4 is characterized in that: In step S7, during the polishing of the stent, the front and back surfaces of the stent are polished in a plasma polisher for 5 to 8 minutes each, and then the pattern on the surface of the stent is polished with a ball drill, and the macroconnector tissue surface is not polished to ensure the integrity of the grid on the macroconnector tissue surface.
6. The method for digitally designing and manufacturing removable dentures using TSP technology according to claim 5 is characterized in that: In step S9, the base forming process includes the following steps: S91. Preliminary inspection: check whether the bracket and wax base are neat and whether they fit tightly with the working model; check whether the edges of the bracket and wax base are round and blunt and whether they are well sealed; check whether there is residual wax on the surface of the artificial teeth and whether the bite-jaw relationship is good; check whether the posterior bank area of the model is closed; S92, trimming the working model and placing it in a mold box, trimming the height of the working model with a wet grinder, the height of the working model does not exceed 2 / 3 of the mold box; the mold box includes an upper mold box and a lower mold box, pouring the mixed gypsum into the lower mold box, the height of the gypsum in the lower mold box is located at 1 / 2 or 1 / 3 of the height of the lower mold box, and then pressing the working model into the gypsum of the lower mold box, so that the bracket and artificial teeth on the working model are all wrapped with gypsum, when the gypsum is close to solidification, remove the excess gypsum with a brush or a spatula under the condition of slow running water, so that the artificial teeth, wax base, and the edge of the lower mold box are fully exposed, and the surface of the remaining gypsum is required to be smooth without undercuts; S93, closing the upper mold box and the lower mold box, and after the gypsum inside the lower mold box is completely solidified, applying a release agent on the surface of the gypsum with a brush, and then closing the upper mold box and the lower mold box, wherein the edges of the upper mold box and the lower mold box are in close contact; S94, pouring plaster into the upper mold box, slowly pouring the prepared plaster into the upper mold box from one side and gently vibrating the upper mold box to expel the air in the upper mold box, until the prepared plaster fills the upper mold box, and then pressing the top cover tightly; S95, soak the mold box, and after the gypsum in the mold box is completely solidified, soak the mold box in hot water above 80°C for 3 to 5 minutes and then take it out; S96, separate the upper mold box from the lower mold box, gently pry the mold box to separate the upper mold box from the lower mold box, form a plaster cavity inside the mold box, rinse the remaining wax in the mold box with boiling water, and check whether the artificial teeth are lost or shifted; S97. Trim the edge of the plaster cavity, blow it clean with an air gun, and apply a release agent on the plaster surface; S98, blending resin, blending the dental tray powder and the monomer according to a proportion to form a resin; S99, press the resin into the bracket, take out the bracket, place it in the upper mold box, take an appropriate amount of the blended resin in the dough stage, knead it evenly by hand, and gently press it on the bracket tissue surface in the upper mold box to fill the grooves of the entire tissue surface; S910, base molding, and denture processing, the upper mold box and the lower mold box are pressed tightly, fixed on the pressure rack, and then placed in boiling water, kept for 25-30 minutes, taken out, placed at room temperature for 10-15 minutes, and then the upper mold box is separated from the lower mold box; use a small hammer to knock the movable plate at the bottom of the mold box to make the model fall out of the mold box, use plaster shears to trim the plaster and model around the denture, use an air chisel to remove the working model, grind and polish the base, and after polishing, use an ultrasonic cleaner to clean the polishing paste on the surface of the denture, and the movable denture is formed.