CN113397744B - Method for manufacturing complete denture with personalized polishing surface by using old denture - Google Patents

Abstract

The invention discloses a method for manufacturing a complete denture with an individualized polishing surface by utilizing an old denture, which comprises the following specific steps: preparing an old maxillary denture and an old mandibular denture of a patient; taking the old maxillary denture as an individual tray, and carrying out final impression preparation and polishing surface plastic finishing; taking the old mandibular false tooth as individual tray, making final impression and polishing surface plastic finishing; scanning the upper jaw final impression mold and the lower jaw final impression mold with personalized polished surfaces to obtain an STL file; separating dentition from the STL file; cutting the separated upper dentition and lower dentition by using a CAD/CAM method through a resin block; and resetting the cut dentition into the embedded female die cavity, filling the glue and performing injection molding to complete the manufacture of the complete denture. The invention has more accurate and simple manufacture; the defect of insufficient forming caused by directly forming the personalized polished surface by self-setting resin is avoided; reduces the time for adjusting the occlusion when wearing the teeth, and enables the patient to adapt to the new complete denture quickly.

Description

Method of making a complete denture with a personalised polished surface from an old denture

technical field

The invention belongs to the technical field of denture manufacturing, and in particular relates to a method for manufacturing a complete denture with a personalized polished surface by using an old denture.

Background technique

Dentures made for people with missing teeth are called complete dentures. The stability of complete dentures is affected by the peripheral neuromuscular system in the mouth. Oral functions such as articulation, chewing, swallowing, smiling, and laughter are complex and individualized by the muscles of the tongue, lips, cheeks, and floor of the mouth. For patients with complete dentures, neuromuscular control is the key to the stability of the denture. Fish first proposed the concept of the neutral zone of a complete denture in 1993, which was defined as the potential gap between the lips, cheeks, and tongue muscles around the denture. In theory, in the neutral zone, the strength of the cheek or labial and tongue muscles is Balanced. The face of the complete denture in contact with the labiobuccioglossus muscle is the polished surface of the denture. Studies have shown that selecting artificial teeth with appropriate shape and size, and arranging them in the neutral area, and at the same time adapting the shape of the polished surface to the neutral area can balance the strength of the lips, cheeks, and tongue muscles, which is beneficial to complete dentures. The retention and stability of alveolar ridge is more meaningful, especially for cases with severe alveolar ridge resorption. At the same time, the polished surface reduces food build-up and helps the cheek muscles push food onto the occlusal surface, making chewing easier. Therefore, the production of personalized polished surfaces is very important. Nonetheless, most dentists pay less attention to the tissue and occlusal surfaces of complete dentures. This is due to the additional impressions required to create a personalized finish and the complex lab process, so most dentists leave it to a technician to complete it, but it is not personalized.

In the case of an old denture, the method of using the old denture to make a personalized polishing surface: Method 1, use a tissue indicator to shape the polished surface of the old denture by instructing the patient to do edge shaping, and make a guide plate, copy The polished surface of the denture, complete the new denture; Method 2, place self-curing resin on the polished surface of the completed denture base, and instruct the patient to complete the action of edge shaping to form a personalized polished surface, and the final polishing is completed. dentures.

If the polished surface is made by tissue indicator, and a guide plate is made to replicate the polished surface, the whole process is done manually, which is time-consuming, laborious and inaccurate.

If self-curing resin is placed on the polished surface of the old denture to directly make a personalized polished surface, because it is directly placed in the patient's mouth for molding, it will have a stimulating effect on the mucous membrane, and the fluidity of the self-curing resin is very high. poor, so the ideal polished surface shape cannot be formed.

SUMMARY OF THE INVENTION

The object of the present invention is to provide a method for using an old denture to make a complete denture with a personalized polished surface, obtain the STL file of the personalized polished old denture directly molded by silicone rubber by means of digital scanning, and then By separating the dentition in the STL file and cutting the resin block by means of CAD/CAM, the dentition of the old denture is reproduced. The old denture is directly embedded as a wax pattern to form a female mold cavity, and the cut resin dentition is directly reset into the female mold cavity, and the denture is made by plastic injection molding. It avoids the disadvantage of time-consuming and labor-intensive manufacturing of the guide plate in the traditional way, and is more accurate and simple. At the same time, it also avoids the defects of mucosal irritation caused by direct molding of self-curing resin to individualized polished surface and insufficient molding caused by poor fluidity. At the same time, it accurately replicates the stable occlusion of the old denture, reduces the time for adjusting the occlusion when the new denture is worn, and enables the patient to quickly adapt to the new denture.

In order to achieve the above object, the present invention adopts the following technical solutions:

A method for using an old denture to make a complete denture with a personalized polished surface, comprising the following specific steps:

Prepare the patient's old maxillary and mandibular dentures;

Using the old maxillary denture as an individual tray, the final impression is made with polyether silicone rubber, and the polished surface is reshaped at the same time to form the maxillary final impression with a personalized polished surface;

Using the old mandibular denture as an individual tray, the final impression is made with polyether silicone rubber, and the polished surface is reshaped at the same time to form a mandibular final impression with a personalized polished surface;

Scan the finished maxillary final impression and mandibular final impression, and obtain the corresponding STL file;

Separate the upper and lower dentition from the obtained STL file;

Cut the separated upper and lower dentition with resin block by CAD/CAM method;

Embed the old maxillary denture forming the maxillary final impression into the female mold cavity, and then reset the cut upper dentition corresponding to the maxillary final impression into the female mold cavity, and then perform plastic injection to complete the maxillary denture. make;

Embed the old mandibular denture forming the mandibular final impression into the female mold cavity, and then reset the cut lower dentition corresponding to the mandibular final impression into the female mold cavity and then carry out plastic injection molding to complete the mandibular denture production. ;

Finished maxillary and mandibular dentures are polished to complete complete dentures with individual polished surfaces.

It is further preferred that, prior to taking the final impression, if the old maxillary denture and the old mandibular denture have short edges, edge shaping is performed to lengthen the excessively short edges.

More preferably, when scanning the final maxillary and mandibular impressions with individual polished surfaces, the 3shape three-dimensional scanner is used for scanning.

It is further preferred that the STL file includes a maxillary STL file and a mandibular STL file, the maxillary STL file is obtained by scanning a final impression of the maxilla with a personalized polished surface, and the mandibular STL file is obtained by scanning a maxillary final impression with a personalized polished surface. A final impression of the mandible was obtained.

Beneficial effects: the present invention obtains the personalized polished surface STL file directly formed by using the old denture with silicone rubber by means of digital scanning, and then separates the dentition in the STL file and cuts the resin block by means of CAD/CAM, Thereby replicating the dentition of the old denture. The old denture is directly embedded as a wax pattern to form a female mold cavity, and the cut resin dentition is directly reset into the female mold cavity, and the denture is made by plastic injection molding. It avoids the disadvantage of time-consuming and labor-intensive manufacturing of the guide plate in the traditional way, and is more accurate and simple. At the same time, it also avoids the defects of mucosal irritation caused by direct molding of self-curing resin to individualized polished surface and insufficient molding caused by poor fluidity. At the same time, it accurately replicates the stable occlusion of the old denture, reduces the time for adjusting the occlusion when the new denture is worn, and enables the patient to quickly adapt to the new complete denture.

Description of drawings

Various objects, features and advantages of the present invention will become more apparent from consideration of the following detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the invention and are not necessarily drawn to scale. Throughout the drawings, the same reference numbers refer to the same or like parts. in:

Fig. 1 is the patient's old maxillary denture prepared by the present invention;

Fig. 2 is the patient's old mandibular denture prepared by the present invention;

Fig. 3 is the final impression image of maxillary with personalized polished surface formed in the present invention;

Figure 4 is a final impression of the mandible with individual polished surfaces formed in the present invention;

5 is a screenshot of the maxillary impression and the screenshot of the mandibular impression obtained by taking a screenshot of the STL file in the present invention;

6 is a schematic diagram when the upper dentition and the lower dentition are separated from the STL file in the present invention;

7 is a schematic diagram of cutting the separated upper dentition and lower dentition with a resin block by the method of CAD/CAM in the present invention;

Fig. 8 is a schematic diagram of repositioning the cut upper dentition into the female mold cavity formed after the old maxillary denture is embedded, and the cut lower dentition is restored to the old mandibular denture after being embedded and shaped Schematic diagram of the cavity of the female mold;

Fig. 9 is the complete denture made in the present invention.

Detailed ways

Exemplary embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and accompanying drawings are essentially for illustration purposes, rather than for limiting the present invention. invention.

In the following description of various exemplary embodiments of the present invention, reference is made to the accompanying drawings, which form a part hereof and in which are shown by way of example various exemplary structures, systems and steps in which various aspects of the present invention may be implemented . It is to be understood that other specific arrangements of components, structures, exemplary devices, systems and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Furthermore, although the terms "on," "between," "within," etc. may be used in this specification to describe various exemplary features and elements of the invention, these terms are used herein for convenience only, such as according to The orientation of the examples in the drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of structures to fall within the scope of the present invention.

Example 1:

As shown in Figures 1-9, this embodiment provides a method for making a complete denture with a personalized polished surface using an old denture, including the following specific steps:

Prepare the old maxillary denture and the old mandibular denture provided by the patient. The occlusion of the old maxillary denture and the old mandibular denture is relatively stable, the jaw position is correct, and the denture edge is basically extended; Reference number 1 points to the polished surface shape of the old maxillary denture, and reference number 2 points to the dentition of the old maxillary denture. It can be seen that the polished surface shape is artificial, not personalized, and its dentition is mild. Wear; wherein, reference numeral 3 in Figure 2 points to the polished surface morphology of the old mandibular denture, reference numeral 4 points to the dentition of the old mandibular denture, and reference numeral 5 points to the tongue of the old mandibular denture In the lateral flange area, it can be seen that the shape of the polished surface is artificial, not personalized, the dentition is slightly worn, and the lingual flange area is slightly insufficiently stretched.

Using the old maxillary dentures as individual trays, the final impression is made with polyether silicone rubber, and the polished surface is reshaped at the same time to form the maxillary final impression with personalized polished surface; as shown in Figure 3, where , the reference numeral 6 designates the individualized polished surface of the final maxillary impression with individualized polished surface.

Using the old mandibular denture as an individual tray, the final impression is made with polyether silicone rubber, and the polished surface is reshaped at the same time to form the final impression of the mandible with personalized polished surface; as shown in Figure 4, where , the reference numeral 7 designates the individualized polished surface of the final impression of the mandible with individualized polished surface.

Use 3shape 3D scanner to scan the maxillary final impression with personalized polishing surface and the mandibular final impression with personalized polishing surface to obtain STL file. At this time, you can take a screenshot of the STL file, as shown in Figure 5. Maxillary screenshot 8 and mandibular screenshot 9; while scanning a maxillary final impression with a personalised finish and a mandibular final impression with a personalised finish, you can scan the maxillary final impression with a personalised finish and The final impression of the mandible with personalized polishing surface, the obtained STL file also includes the maxillary STL file and the mandibular STL file obtained by scanning respectively, take a screenshot of the maxillary STL file, get the maxillary screenshot 8, take a screenshot of the mandibular STL file, get Jaw screenshot 9.

Separate the upper and lower dentition from the obtained STL file, as shown in Figure 6;

Cut the separated upper and lower dentition with resin blocks by CAD/CAM method, as shown in Figure 7;

As shown in Figure 8, the old maxillary dentures that formed the maxillary final impression were embedded and formed into the female mold cavity, and then the cut upper dentition corresponding to the maxillary final impression was reset into the female mold cavity, and then the filling was carried out. Plastic injection to complete the production of the maxillary denture; the old mandibular denture forming the mandibular final impression is embedded and formed into the female mold cavity, and then the cut lower dentition corresponding to the mandibular final impression is reset into the female mold cavity and then Carry out plastic injection molding to complete the production of mandibular dentures;

Polish and polish the finished maxillary denture and mandibular denture to complete the personalized polished surface that has been replicated. complete dentures with a personalised finish.

The invention obtains the STL file of the old denture with individualized polished surface directly formed by silicone rubber by means of digital scanning, and then separates the dentition in the STL file and cuts the resin block by CAD/CAM, thereby copying The dentition of the old denture. The old denture is directly embedded as a wax pattern to form a female mold cavity, and the cut resin dentition is directly reset into the female mold cavity, and the denture is made by plastic injection molding. It avoids the disadvantage of time-consuming and labor-intensive manufacturing of the guide plate in the traditional way, and is more accurate and simple. At the same time, it also avoids the defects of mucosal irritation caused by direct molding of self-curing resin to individualized polished surface and insufficient molding caused by poor fluidity. At the same time, it accurately replicates the stable occlusion of the old denture, reduces the time for adjusting the occlusion when the new denture is worn, and enables the patient to quickly adapt to the new complete denture.

Embodiment 2:

This embodiment is a further improvement made on the basis of Embodiment 1, and the specific differences between this embodiment and Embodiment 1 are:

It should be further explained in this example that, before the final impression is made, if the edges of the old maxillary denture and the old mandibular denture are short, edge shaping is performed to lengthen the short margin, such as the lingual flange in this example. Avoid the lingual flange area of the old mandibular denture is too short, thereby destroying the retention effect of the patient's new complete denture.

The present invention is aimed at patients with poor alveolar ridge conditions and who have made complete dentures in traditional ways, which may not achieve the ideal restoration effect, and the retention and stability may not meet the needs of patients. The retention and stability of the denture can be improved by making the patient's personalized polished surface to increase the clamping force of the muscles. However, the traditional way of making the personalized polished surface is cumbersome and time-consuming. If the patient has an old denture and the occlusion is stable, Personalized polished surfaces can be made from old dentures and their stable bite can be reproduced digitally, so that efficient and accurate complete dentures with personalized polished surfaces and stable bites can be obtained, thus greatly improving the retention of complete dentures with the purpose of stability.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (4)

1. A method for manufacturing a complete denture with a personalized polishing surface by using an old denture is characterized by comprising the following specific steps:

preparing an old maxillary denture and an old mandibular denture of a patient;

taking the old maxillary denture as an individual tray, preparing a final impression by using polyether silicon rubber, and simultaneously performing polishing surface plastic finishing to form the maxillary final impression with a personalized polishing surface;

taking the old mandible denture as an individual tray, preparing a final impression by using polyether silicon rubber, and simultaneously performing polishing surface plastic finishing to form the mandible final impression with a personalized polishing surface;

scanning the prepared upper jaw final impression and lower jaw final impression, and acquiring corresponding STL files;

separating the upper dentition and the lower dentition from the obtained STL file;

cutting the separated upper dentition and lower dentition by using a CAD/CAM method through a resin block;

embedding and forming a female die cavity of the old maxillary denture forming the maxillary final impression, resetting the cut upper dentition corresponding to the maxillary final impression into the female die cavity, and then performing glue filling and injection molding to finish the manufacturing of the maxillary denture;

embedding and molding the old mandibular denture forming the mandibular final impression into a female mold cavity, resetting the cut lower dentition corresponding to the mandibular final impression into the female mold cavity, and then filling glue for injection molding to complete the fabrication of the mandibular denture;

and polishing and grinding the manufactured maxillary denture and the mandibular denture to finish the complete denture with the personalized polishing surface.

2. The method for manufacturing a full denture having a personalized polished surface using an old denture as claimed in claim 1, wherein edge shaping is performed to extend an excessively short edge if the edges of the old denture and the old denture are short before the final impression is made.

3. The method for manufacturing a complete denture having a personalized polished surface using an old denture as claimed in claim 1, wherein the scanning is performed using a 3shape three-dimensional scanner when the maxillary final impression and the mandibular final impression having the personalized polished surfaces are scanned.

4. The method for manufacturing a complete denture with a personalized polished surface using an old denture as claimed in claim 1, wherein the STL file comprises an upper jaw STL file and a lower jaw STL file, the upper jaw STL file is obtained by scanning an upper jaw final impression with the personalized polished surface, and the lower jaw STL file is obtained by scanning a lower jaw final impression with the personalized polished surface.

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