TWI392481B - A method for manufacturing dentures with the ability to handle backpacking areas - Google Patents

Description

Denture manufacturing method capable of handling inverted bag area

The present invention relates to the manufacturing technique of a denture, and more particularly to a method of manufacturing a denture having the ability to handle the inverted area.

In the past, the production of braces or dentures relied entirely on manual, hand-made dentures, the accuracy of which relied entirely on the master craftsmanship. In addition to being difficult to control, the dentist must constantly modify the meshing of the braces or dentures. Face to achieve the average bearing stress effect. The shortcomings of this method, in addition to the long repair time, and the inability to accurately modify the mating surface of the teeth, the patient must be forced to adapt to new braces or dentures.

The traditional method of making dentures is to obtain a tooth model (female mold) after the dentist has been grinding the teeth by the dentist. The gypsum is injected into the tooth model, and the gypsum model (male) of the tooth is obtained after the gypsum is hardened. After the plaster model of the tooth is trimmed by the wheel, the positioning needle is implanted, and the plaster is injected into the base model, and then combined with the tooth model coated with the separating agent. After the plaster is hardened, the tooth model is sawed, and the tooth to be made is prepared. After the tooth model is trimmed, the previous preparation of the ceramic denture is completed. In the production of ceramic dentures, the metal base of the ceramic dentures is first prepared, and then fired after the stacking process, and then polished and then polished to complete the finished product. This method is obviously time-consuming and time-consuming and has low precision. It relies on the technician's technology and experience. It has high manufacturing cost and low yield. It also uses a lot of consumables and is very uncompetitive.

The applicant of this case wants to use the mechanical processing method to make the dentures. However, in actual production, it is found that the teeth have different shapes, most of them will form irregular shapes, and even some areas will have inverted features. Appeared, the traditional three-axis machining technology can not complete the processing of this inverted area, leaving a lot of unworkable residual areas after processing, resulting in many problems during mold clamping, and even lead to mold failure, so the case was proposed To solve the problem of the inverted area faced when making dentures by machining.

SUMMARY OF THE INVENTION A primary object of the present invention is to provide a method of manufacturing a dental prosthesis having the ability to process a retractable area, which can process the inverted area and thereby produce a denture that can be properly clamped.

In order to achieve the foregoing object, a method for manufacturing a dental prosthesis having the ability to process a puncture area according to the present invention comprises the steps of: a) obtaining an oral cavity model from a patient's oral cavity by overturning; b) the oral cavity model The position of the denture is required to make a corresponding denture model; c) digitally scanning the denture model to obtain a raw digit model; d) planning a raw digital model by a CAM (Computer Aided Manufacturing) software Processing path; e) using a simulation processing technique, performing simulation processing on a virtual workpiece according to the original processing path to obtain a virtual digit model; f) overlapping the original digit model with the virtual digit model, and presenting The area with difference is defined as the inverted area; g) based on a five-axis processing machine to find the machining axis that can eliminate the inverted area and generate a reverse processing path; and h) a first processing machine Processing a workpiece according to the original processing path, and then performing subsequent processing on the workpiece according to the inverted processing path by the five-axis processing machine to obtain a denture without a reversed area Products. Thereby, the inverted area of the denture processing process can be processed, and the denture which can be correctly clamped can be produced.

In order to explain the technical features of the present invention in detail, the following preferred embodiments will be described with reference to the accompanying drawings, wherein, as shown in the first figure, a preferred embodiment of the present invention provides a processing package The regional ability of denture manufacturing methods mainly has the following steps:

a) Obtain an oral model from a patient's mouth in a mold-over manner.

b) Make a corresponding denture model for the position of the dental model where the denture is to be made. Among them, the mold turning in steps a) and b) and the production of a denture model are conventional techniques and are not described here.

c) performing a digital scan on the denture model to obtain a raw digit model 11 which is shown in the first figure. In the first figure, the rod system located on both sides of the original digit model 11 is a positioning pin. Because it is not the application focus of this case, it is not detailed.

d) An original processing path is planned for the original digital model 11 by a CAM (Computer Aided Manufacturing) software. Among them, the use of CAM software to plan a processing path for a digital model is a well-known technique, and can be understood by those skilled in the art, so that the original processing path is not represented by a schema.

e) Using a simulation processing technique, a virtual workpiece (not shown) is subjected to simulation processing according to the original processing path to obtain a virtual digit model 21, which is shown in the second figure. Among them, the analog processing technology is a well-known technology, and will not be described.

f) The original digital model 11 is overlapped with the virtual digit model 21, and the region where the difference exists is defined as the reverse packet region 31, and the state thereof is as shown in the third figure.

g) Based on a five-axis machining machine, it is sought to eliminate the machining axial direction of the inverted bag section 31, and a reverse wrapping processing path 33 is produced, as shown in the fourth figure.

h) processing a workpiece according to the original processing path by a first processing machine, and then performing subsequent processing on the workpiece according to the inverted processing path 33 by the five-axis processing machine to obtain a denture finished product without a reversed area. In this embodiment, the first processing machine may be a three-axis processing machine or may be a five-axis processing machine as described above. Since the original machining path can be processed according to a general three-axis machining machine, the original machining path can be used in combination with a conventional three-axis machining machine, or can be used in combination with a five-axis machining machine.

By the above steps a) to h), a finished denture having no unwrapped area can be manufactured. It can be seen from the above steps that the present invention can solve the problem of the inverted bag area, and solves the problem that the inverted bag area of the denture can not be processed in the prior art, and the finished product of the denture without the inverted bag area is the denture which can be correctly clamped. .

11. . . Original digital model

twenty one. . . Virtual digital model

31. . . Reverse bag area

33. . . Reverse processing path

The first figure is a schematic diagram of a preferred embodiment of the invention showing the state of the original digital model.

The second figure is a schematic diagram of a preferred embodiment of the present invention showing the state of the virtual digit model.

The third figure is a schematic view of a preferred embodiment of the invention showing the inverted area.

The fourth figure is a schematic view of a preferred embodiment of the present invention showing the inverted package processing path.

11. . . Original digital model

twenty one. . . Virtual digital model

31. . . Reverse bag area

Claims (3)

A method for manufacturing a denture having the ability to process a retractable area includes the following steps: a) obtaining an oral model from a patient's oral cavity by overturning; b) making a corresponding denture model for the position of the oral model where the denture is to be made ; c) digitally scanning the denture model to obtain a raw digit model; d) planning a raw processing path for the original digital model by a CAM (Computer Aided Manufacturing) software; e) using a simulated processing technique, Simulating a virtual workpiece according to the original processing path to obtain a virtual digit model; f) overlapping the original digit model with the virtual digit model, and defining the difference region as a reverse packet region; a five-axis machining machine for finding a machining axis that can eliminate the inverted bag area and generating a reverse wrapping path; and h) processing a workpiece by the first machining machine according to the original machining path, and then Then, the five-axis processing machine performs subsequent processing on the workpiece according to the reverse wrapping processing path to obtain a denture finished product without a rewinding area. The method for manufacturing a dental prosthesis according to the first aspect of the invention, wherein the first processing machine is a three-axis processing machine. The method for manufacturing a dental prosthesis according to the first aspect of the invention, wherein the first processing machine is a five-axis processing machine and the same processing as the five-axis processing machine in step h) machine.