TW201924615A - Method for designing artificial teeth using occlusion curve capable of simulating actual occlusion condition of patient to fabricate artificial teeth compliance with patient's occlusion status - Google Patents

Abstract

A method for designing artificial teeth using occlusion curve includes the following steps: placing a set of fixed tooth retainer in the oral cavity; scanning the oral cavity to obtain a digital dental model; scanning the fixed tooth retainer alone to obtain the tooth retainer data; using a set of occlusion measurement components to measure the occlusion condition of a patient so as to obtain a three-dimensional occlusion curve; superposing the digital dental model with the tooth retainer data through a plurality of positioning points; and, combining with the three-dimensional occlusion curve to obtain the digital artificial teeth. Since the three-dimensional occlusion curve is obtained by measuring the occlusion condition of the patient, the digital artificial teeth may simulate the actual occlusion path of the patient according to the three-dimensional occlusion curve, so as to design the artificial teeth enabling normal occlusion and compliance with the actual occlusion habit for the patient.

Description

Denture design method using occlusion curve

A denture design method, in particular, a denture design method for simulating the actual occlusion of the oral cavity using a three-dimensional occlusion curve.

In general, patients with teeth have dental implants and other treatments. However, today's edentulous treatment is performed by a dental technician to engrave a tooth mold on a plaster mold according to the appearance of the patient's teeth. A mechanical articulator simulates the patient's occlusion action, observes the collision and joint between the teeth during the occlusion process, and then judges the tooth parts that may have joint problems based on experience, and manually trims the tooth mold.

Another type of denture is made by using Computed Tomography (CT) to obtain the patient's overall oral cavity to obtain a patient's digital tooth model, and then transferring the scanned digital tooth mold into a virtual occlusion in the computer. After the device is superposed, the bite condition of the digital tooth model is simulated through the virtual articulator, and then the interference region is adjusted according to the interference situation when the teeth are engaged, so as to make a denture that conforms to the actual oral state of the patient.

However, the above two methods have their shortcomings. The dental mold carved by manual method not only takes time and labor for the production process, but also simulates the bite condition of the tooth mold only through the mechanical articulator, and often has actual bite condition with the patient. The difference, and the occlusion status of each patient is not the same, the mechanical articulator can not simulate the individual occlusion condition of each patient, so that the optimal occlusion state of the denture is different from the actual occlusion state of the patient. When using a denture, there will be problems such as malocclusion, which may cause inconvenience in use, and the tooth mold must be modified, which may result in longer working hours. However, the digital tooth mold produced by the full-port scanning method can only perform a simple occlusion simulation operation through the virtual articulator, and it is also impossible to take into account the actual oral occlusion of different patients, and when the patient actually uses the artificial tooth, the same There will be discomfort such as malocclusion.

In view of the fact that the conventional mechanical articulator and the virtual articulator cannot simulate the actual occlusion of the patient, the present invention proposes a denture design method using the occlusion curve, which can simulate the actual patient's occlusion by the occlusion curve and the digital tooth model. Make dentures that fit close to the patient's occlusion.

In order to achieve the foregoing object, the method for designing a denture using the occlusion curve of the present invention comprises the steps of: (a) establishing a digital tooth mold, scanning a fixed braces that have been mounted on the ankle portion, and obtaining the ankle portion and the fixed braces The digital tooth mold, wherein the fixed braces have a plurality of positioning points; (b) establishing a braces data, separately scanning the fixed braces to generate the braces data; (c) establishing a three-dimensional occlusion curve, At least one occlusion measuring component is mounted on the fixed braces, the occlusion measuring component measures the oral motion and the occlusion condition to generate the three-dimensional occlusion curve; (d) establishing a digital denture model, and the dental occlusion data is obtained by the positioning points The digital tooth patterns are positioned to overlap each other to generate a digital denture model, wherein the upper and lower jaw portions of the digital denture model can simulate an actual occlusion motion according to the three-dimensional occlusion curve.

The digital tooth mold and the dental sleeve data are superposed according to the corresponding positioning points, and the three-dimensional occlusion curve is superimposed with the digital tooth mold and the dental mouth data to form the digital dental model, and the digital dental teeth can be merged into a occlusal path. The analysis software, in the occlusion path analysis software, allows the digital denture model to perform the occlusion operation, thereby simulating the actual occlusion of the patient's oral cavity, and then designing the denture with the digital design of the denture software. Further, an actual denture model is produced.

The denture prepared by simulating the actual occlusion of the patient's oral cavity by the three-dimensional occlusion curve can conform to the patient's occlusion habit, make the patient more comfortable when wearing the denture, reduce the cost of the repeated modification, and design by digital means. Dentures not only show the relative position between the teeth more accurately, but also reduce the material and time cost of the actual tooth.

The present invention discloses a denture design method using a occlusion curve. Referring to Figures 1 and 2, a occlusion measurement set 10 and a plurality of fixation cuffs 20 are used in the method of the present invention. The occlusion measurement set 10 has a plurality of occlusion measuring components. In a preferred embodiment, the occlusion measurement set 10 has a first occlusion measuring component 11 and a second occlusion measuring component 12, each occlusion The measuring elements 11, 12 are disposed on a corresponding fixed socket 20, and the two fixed sockets 20 are mounted on the upper jaw 51 and the lower jaw 52 of the patient's crotch portion 50.

Referring to FIG. 2 and FIG. 3 , each of the fixing braces 20 includes a nip 21 and a bracket 22 . For example, the occlusal portion 21 is mounted on the upper jaw 51, and has two socket walls 211 and a socket groove 212, wherein a plurality of the sleeve walls 211 are disposed on the sleeve wall 211. The positioning points 213 may be composed of non-reflective materials such as ceramic or male glue; the sockets 212 are formed between the two cuff walls 211, and the cuffs 212 have a plurality of cogs, teeth The shape of the inner surface of the groove corresponds to the shape of the tooth of the upper jaw 51. In this embodiment, the bracket 22 has a connecting portion 221 and a fixing member 222. The connecting portion 221 is connected between the socket wall 211 and the fixing member 222. The fixing member 222 further includes a recess 223. To accommodate a corresponding one of the occlusion measuring elements 11, 12.

The occlusion measuring elements 11 and 12 are mounted on the bracket 22 of the fixing bolster 20, and the occlusion measuring elements 11, 12 are received and fixed by the recess 223. The first occlusion measuring component 11 is configured to measure the movement data of the upper jaw 51, and the second occlusion measuring component 12 is configured to measure the movement data of the lower jaw 52. The occlusion measuring elements 11, 12 move in accordance with the occlusion action of the sac portion 50.

Since the two bite measuring elements 11 and 12 have the same constituent members, the first bite measuring element 11 will be described as an example. Referring to FIG. 4, the first occlusion measuring component 11 includes an accelerometer 111, a gyroscope 112, an analog-to-digital converter 113, and a communication module, as disclosed in the applicant's patent application No. 10514201. 114. The occlusion measuring component 11 further includes a controller 116, a power module 117, and an input and output control component 118. The power module 117 provides power required for the occlusion measuring component. The controller 116 is electrically connected to the power module 117, the input/output control component 118, and the analog digital converter 113. The first occlusion measuring component 11 communicates with a host, such as a mobile device 31 or a computer 32. The mobile device 31 and the computer 32 each include a processing unit 310, 320. The controller 116 can receive the measured information of a series of three-dimensional coordinate signals sent to the mobile device 31, the computer 32, or a cloud database 33 through the communication module 114. The communication module 114 can be wired. For transmission, such as Ethernet, preferably, the communication module 114 is a Bluetooth transmitting module that can communicate using a wireless signal 34.

Please refer to Table 1 below, which is a schematic diagram of a set of three-dimensional coordinates according to a preferred embodiment of the present invention. The three-dimensional coordinates are three-dimensional relative coordinates of the upper and lower jaws during movement. Table 1

Referring to FIG. 4 , FIG. 5 and Table 1 , the occlusion measuring component 11 uses the communication module 114 to transmit the set of three-dimensional coordinate signals S3D1 to the processing unit 320 of the computer 32 through the occlusion measuring component 11 respectively. Or respectively, the set of three-dimensional coordinate signal S3D2 is transmitted to the processing unit 310 of the mobile device 31 through the occlusion measuring component 11 to analyze the set of three-dimensional coordinate signals S3D1 or S3D2 to display the three-dimensional occlusion curve PATH1 in real time, such as Figure 5, wherein the x-axis axis extends in the direction of the front of the two eyes, the y-axis axis extends outward from the right ear and is orthogonal to the x-axis axis, and the z-axis axis is orthogonal to the x-axis and the y-axis, respectively. The axis extends toward the foot.

Figure 5 illustrates a schematic diagram of a three-dimensional bite curve PATH1 in accordance with a preferred embodiment of the present invention. According to the plurality of coordinate point data of the three-dimensional coordinates of Table 1, the coordinate points of the three-dimensional occlusion curve PATH1 can be drawn by connecting the coordinate points, and when the user's upper and lower jaws are in relative motion, the 3D animation can be Displayed on the mobile device 31 or the computer 32 in real time. Even the plurality of coordinate point data in Table 1 can be uploaded to the cloud database 33, and the medical personnel can receive the coordinate point data from the cloud database 33 and then display a 3D animation of the oral occlusion on his mobile device. This is of great help in tracking the occlusion status after implanting, or in the production of dentures.

In FIG. 4, the accelerometer 111 can be a three-axis accelerometer sensor that generates an acceleration analog signal SACC1 in response to an oral occlusion motion, and the gyroscope 112 generates a responsive to the oral occlusion motion. The angular velocity analog signal SGYR1. The analog-to-digital converter 113 converts the acceleration analog signal SACC1 and the angular velocity analog signal SGYR1 into an acceleration digital signal SDACC1 and an angular velocity digital signal SDGYR1, respectively. The controller 116 can be built with an acceleration conversion displacement algorithm and a path prediction algorithm, and the acceleration conversion displacement algorithm can convert the acceleration signal and the information in the angular acceleration signal into a displacement information, and then the controller The displacement information is converted into a displacement signal SDISP1 and transmitted to the communication module 114 to facilitate the transmission of the information of the three-dimensional coordinates. The plurality of three-dimensional coordinates can be generated as follows: each of the occlusion measuring elements 11 and 12 can be built in according to a current displacement signal (for example, SDISP1(t)), the acceleration digital signal SDACC1, the angular velocity digital signal SDGYR1, and the controller 116. The path prediction algorithm predicts the position coordinates of the next time (eg, SDISP1(t+1)), or compensates for the current displacement signal SDISP1(t). The previous step is repeated to obtain the complex three-dimensional coordinates included in each three-dimensional coordinate signal S3D1.

Through the three-dimensional occlusion curve PATH1, the actual occlusion path of the crotch portion 50 can be presented.

The present invention provides a denture design method using the occlusion curve by using the above-mentioned components. Referring to FIG. 6, the steps are as follows: S10: establishing a digital tooth model; S20: establishing a dental mouthpiece data; S30: establishing a three-dimensional occlusion curve; S40: Establish a digital denture model.

Step S10 firstly attaching the fixed braces 20 to the upper jaw 51 and the lower jaw 52, and then using the computed tomography (CT) or the intraoral and external scanner to fix the braces 20, the upper jaw 51 and the lower jaw 52. Performing a coordinate scan to obtain a digital tooth mold A having the fixed tooth cover 20, the upper jaw 51 and the lower jaw 52, the digital tooth mold A comprising positioning marks obtained by scanning the plurality of positioning points 213 on the fixed mouthpiece 20, and using three-dimensional The coordinates indicate that the upper jaw 51 and the lower jaw 52 form an oral coordinate data.

In step S20, the fixed braces 20 are taken out from the upper jaw 51 and the lower jaw 52, and the fixed braces 20 are scanned by computer tomography, etc., to obtain a braces data B of the fixed braces 20.

In step S30, the fixing jaws 20 are mounted on the upper jaw 51 and the lower jaw 52, and the first occlusion measuring component 11 and the second occlusion measuring component 12 are respectively mounted on the fixing braces 20, when The upper jaw 51 and the lower jaw 52 start to engage, and the occlusion measuring elements 11, 12 start to move with the upper jaw 51 and the lower jaw 52. During the movement, the occlusion measuring elements 11, 12 measure the upper jaw 51. And the occlusion path of the lower jaw 52, and according to the measured occlusal path, a set of three-dimensional coordinate signals S3D1, S3D2 are generated. The communication module 114 of the occlusion measuring components 11 and 12 transmits the three-dimensional coordinate signals S3D1 and S3D2 to the mobile device 31 or the computer 32. The mobile device 31 or the computer 32 analyzes the three-dimensional coordinate signal S3D1. The S3D2 is converted into the three-dimensional occlusion curve PATH1, and the three-dimensional occlusion curve PATH1 is displayed on the mobile device 31 or the computer 32, wherein the three-dimensional occlusion curve PATH1 represents the actual occlusion path of the upper jaw 51 and the lower jaw 52.

In this embodiment, step S10 is the first step, and then steps S20 and S30 are sequentially performed, but the order of the above steps may be exchanged with each other, not limited to the order described above.

From step S10 to step S30, the digital tooth model A, the dental mouth data B and the three-dimensional occlusion curve PATH1 are obtained. In step S40, since the digital tooth mold A and the dental mouthpiece data B are obtained by scanning the outer shape of the fixed dental mouthpiece 20, the fixed dental mouthpieces 20 have the positioning points 213, so that the digital dental mold A and the Each of the braces data B has a corresponding positioning mark generated by scanning the common positioning points 213. The digital tooth mold A, the dental mouth data B and the three-dimensional occlusion curve PATH1 are merged into a denture design software, and the digital design software can superimpose the digital tooth mold A, the dental mouth data B and the three-dimensional occlusion curve PATH1. And design and trim dentures using digital methods. By pairing the digital tooth mold A and the positioning marks on the dental mouthpiece data B, the digital tooth mold A and the fixed dental mouthpiece B are superposed to form a digital tooth body, and the digital tooth body includes the oral coordinate data. . Then, the coordinate axis of the three-dimensional occlusion curve PATH1 is superimposed with the oral coordinate data of the digital tooth to obtain a digital denture model C.

The denture design software can display the digital denture model C, and according to the three-dimensional occlusion curve PATH1 in the digital denture model C, can control the bite cooperation of the digital denture model C and display an actuation process, thereby simulating the upper jaw 51 and the The path of the actual occlusion of the lower jaw 52 can also be used to analyze the angle and height of the upper and lower jaw teeth during the occlusion process. In addition, the denture design software can further evaluate the interference between the upper jaw teeth and the lower jaw teeth. When the upper jaw teeth and the lower jaw teeth are in contact or even collide during the occlusion process, the interference function can be used to evaluate the upper and lower jaw teeth during the contact collision. The location of the contact and the degree of collision to obtain a more detailed bite. In addition, by using the denture design software, the state of the upper and lower jaw teeth can be truly displayed, and the design functions of the digital denture can be directly trimmed, crown design, and gingival line drawing, and then the actual shape can be created in the subsequent molding process. Denture model.

Since the digital denture model C contains the information of the three-dimensional occlusion curve PATH1, the digital denture model C can simulate the real upper and lower occlusion movement, and the real occlusion movement can be referred to during the design of the denture, according to the patient's occlusion habit. Design dentures that are normal and conform to the patient's occlusion habits, reduce discomfort in the patient's use, and reduce subsequent multiple trimming due to discomfort; at the same time, digitize the procedure and display and simulate digital dentures on the display device The various states, and the direct manipulation of the digital denture on the software, can reduce the actual time and material cost of the teeth.

10‧‧‧Bite measurement group

11‧‧‧First occlusion measuring component

111‧‧‧Acceleration regulations

112‧‧‧Gyro

113‧‧‧ analog digital converter

114‧‧‧Communication Module

116‧‧‧ Controller

117‧‧‧Power Module

118‧‧‧Input and output control components

12‧‧‧Second bite measuring component

20‧‧‧fixed braces

21‧‧‧ occlusion

211‧‧ ‧ braces

212‧‧‧ braces

213‧‧‧Location points

22‧‧‧ bracket

221‧‧‧Connecting Department

222‧‧‧Fixed parts

223‧‧‧ Groove

31‧‧‧Mobile devices

310‧‧‧Processing unit

32‧‧‧ computer

320‧‧‧Processing unit

33‧‧‧Cloud database

34‧‧‧Wireless signal

50‧‧‧E

51‧‧‧Upper

52‧‧‧Download

PATH1‧‧‧3D occlusion curve

S3D1, S3D2‧‧‧ three-dimensional coordinate signal

SACC1‧‧‧ Acceleration analog signal

SGYR1‧‧‧ angular velocity analog signal

SDACC1‧‧‧Acceleration Digital Signal

SDGYR1‧‧‧ angular velocity digital signal

SDISP1‧‧‧displacement signal

Figure 1 is a schematic view of the present invention using a occlusion measuring element placed adjacent to the oral cavity. Figure 2 is a schematic illustration of the use of a fixed braces in the present invention for attachment to the upper palate. Figure 3 is a schematic plan view of a fixed mouthpiece used in the present invention. Figure 4: Schematic diagram of the bite measurement element of the present invention. Fig. 5 is a schematic view showing a three-dimensional occlusion curve produced by the occlusion measuring element in the present invention. Figure 6: Flow chart of the invention.

Claims (7)

A method for designing a denture using a occlusion curve, the method comprising: (a) establishing a digital tooth mold, scanning a fixed braces that have been mounted on the ankle portion, and obtaining the digital tooth after the ankle portion is combined with the fixed braces a mold, wherein the fixed braces have a plurality of positioning points; (b) establishing a braces data, separately scanning the fixation braces to generate the braces data; (c) establishing a three-dimensional occlusion curve, installing at least one occlusion component The occlusion measuring component measures the oral movement and the occlusion to generate the three-dimensional occlusion curve on the fixed braces; (d) establishing a digital denture model, and the positioning data of the dental cuff and the digital tooth model are positioned by the positioning points The digital denture model is superimposed, wherein the upper and lower jaw portions of the digital denture model can simulate the actual occlusion motion according to the three-dimensional occlusion curve. The denture occlusion design method according to claim 1, further comprising: (e) transferring the digital denture model into a occlusion path analysis software to simulate the occlusion action of the digital denture model and contacting the upper jaw teeth and the lower jaw teeth The collision process is evaluated by interference; (f) The digital denture model is used for dressing, crown design, and gingival line drawing processing. The method of claim 2, wherein the fixing brace has a fixing bracket, one end of the fixing bracket is mounted on the front region of the fixing braces, and the other end of the fixing bracket has a groove for the occlusion The measuring element is embedded in the recess. The denture occlusion design method according to claim 3, wherein the fixing bracket is composed of a polymer, a plastic or a polymer. The denture occlusion design method according to claim 1, wherein the locating point is composed of a non-reflective element such as ceramic or male glue. The denture occlusion design method according to claim 1, wherein the occlusion measuring component has a gyroscope, an accelerometer, and a single wafer. The denture occlusion design method according to claim 1, wherein the braces data is obtained by scanning a fixed braces with a computerized tomography.