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Standard dental crown positioning method used for false-tooth digital restoration system

A technology of restoration system and positioning method, applied in the field of oral restoration, can solve problems such as low degree of automation, many manual operations, and errors, and achieve the effect of high degree of automation, low operation requirements, and avoiding errors

Inactive Publication Date: 2018-01-30
FOSHAN NUOWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (1) The strategy of rough positioning and manual fine-tuning is mainly adopted. The positioning process requires more manual operations, with low degree of automation and low efficiency, and requires high user operations.
[0005] (2) Based on manual operation, in the three-dimensional environment, unnecessary errors may be caused by viewing angle problems, so that the positioning results cannot meet the requirements of prosthodontics, and the accuracy is low

Method used

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  • Standard dental crown positioning method used for false-tooth digital restoration system
  • Standard dental crown positioning method used for false-tooth digital restoration system
  • Standard dental crown positioning method used for false-tooth digital restoration system

Examples

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Embodiment 1

[0088] Aiming at the problems of low automation, low efficiency, difficult operation and low precision in the prior art, the present invention proposes a standard crown positioning method for a denture digital restoration system. After the model is imported into the system, the abutment only needs to be adjusted at most once. The coordinate system can realize the automatic positioning of the standard crown, which has the advantages of simple positioning process, simple operation and good positioning effect. like figure 1 As stated, the basic steps of the method are:

[0089] Step 1. Import the reference object.

[0090] Reference objects introduced by the present invention include adjacent teeth, abutments and inlay preparations. The method of the present invention is suitable for standard crown positioning in various situations, and the specific positioning types and corresponding reference objects are as follows:

[0091] (a) Positioning according to the left and right ad...

no. 2 example

[0144] According to the positioning type, the present invention can divide the automatic positioning methods into:

[0145] Type 1. Automatic positioning according to the left and right adjacent teeth.

[0146] The specific implementation process of automatic positioning according to the left and right adjacent teeth is as follows:

[0147] 1. Obtain the shape high points of the left and right adjacent teeth and the standard crown.

[0148] The 5 shape high points of the left and right adjacent teeth and the standard crown were obtained respectively. The shape high points of the standard crown include: the shape high points EXP1, EXP2 in the x-axis direction (ie the mesio-distal direction), the shape high points EXP3 and EXP4 in the y-axis direction (ie the buccal / lipolingual direction), and the shape high points in the z-axis direction. Point (cusp point) EXP5. Among them, EXP1, EXP3 are minimum values, EXP2, EXP4 are maximum values, such as Figure 5 shown. The left adj...

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Abstract

The invention discloses a standard dental crown positioning method used for a false-tooth digital restoration system. The method comprises the following steps of according to a positioning type of a standard dental crown, introducing a corresponding reference object; according to the positioning type of the standard dental crown, carrying out automatic identification and / or automatic adjusting anddetermining an abutment tooth coordinate system; and according to the reference object, using an improved automatic positioning method to position a transferred standard dental crown in the determined abutment tooth coordinate system, and outputting a positioning result of the standard dental crown, and in the improved automatic positioning method, according to a high spot of a contour of the reference object and a high spot of a contour of the standard dental crown, zooming and translating the standard dental crown. In the invention, automatic identification, automatic adjusting and automatic positioning methods are integratedly applied to position the standard dental crown; the method does not depend on manual operation; an automation degree and efficiency are high; an operation requirement on a user is low; and an error of the manual operation because of a visual angle problem is avoided and precision is high. The method can be widely applied to the dental restoration field.

Description

technical field [0001] The invention relates to the field of oral restoration, in particular to a standard dental crown positioning method for a denture digital restoration system. Background technique [0002] With the development of computer technology, information technology and graphics technology, oral CAD / CAM digital restoration technology, with the characteristics of high efficiency, high precision and intelligence, is gradually replacing the traditional manual design and manufacturing methods of dental restorations A technological revolution in restoration. In the denture restoration CAD system, the standard crown positioning is the basis for the external surface design of full crowns, full crown bridges and other restorations. The accurate positioning of the standard crown model directly determines the quality of the final restoration. The local coordinate system of the standard crown has been set according to its own characteristics when the database is establish...

Claims

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Application Information

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IPC IPC(8): G16H50/50
Inventor 王煜肖兵魏昕夏鸿建马杰
Owner FOSHAN NUOWEI TECH
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