A method for designing and manufacturing individual pallets of dentition defect partitioned pressure impressions

Abstract

The invention relates to a method for designing and manufacturing individual trays of pressure impression molds with dentition defect partitions. Cloud data; fill in the undercut area; the data of the missing tooth area is uniformly enlarged by 1-3mm along the normal direction of the data surface, and the remaining dentition data is uniformly enlarged by 0.5-1mm to obtain the main part of the virtual tray; along the normal direction of the inner surface of the virtual tray The thickness is evenly increased by 1-3mm; impression material overflow and retention holes are reserved on the surface of the tray corresponding to the area of ​​the remaining dentition; the main part of the virtual tray and the data boundary of the handle are fused, and individual trays for the impression are made through 3D printing equipment. According to the characteristics of different final impression materials, the present invention can accurately and quantitatively control the pressure of the alveolar ridge and the remaining dentition in the edentulous area when making the final impression, replacing the traditional manual production, which is conducive to improving the design and manufacture of removable partial dentures. Spend.

Description

technical field [0001] The invention relates to the manufacture of a repair impression tray, in particular to a method for designing and manufacturing individual trays of pressure impression impressions with dentition defect partitions. Background technique [0002] When a single jaw is missing from 1 to 1 remaining natural tooth, it is called dentition defect. Patients with dentition defects are routinely treated with removable partial dentures. Since the amount of alveolar ridge sinking in the dentition and edentulous areas of removable partial dentures is different during chewing, the best impression technique for dentition defects is the zoned pressure impression technique. Applying this technology, the actual surface morphological characteristics of the alveolar ridge and teeth in the edentulous area can be obtained during the actual chewing movement of a single jaw with edentulousness, and the removable partial denture can be made more reasonable. Stress distribution...

AI Technical Summary

Problems solved by technology

However, the accuracy is poor, and the success rate of making the final impression is low, which can easily affect the accuracy of the impression.

[0004] 2. Individual tray method of self-coagulation or photosensitive resin sheet: various clinical production requirements can be realized, but the initial impression must be poured into a plaster model, and special equipment and material sheets are required, and the cost is relatively high

And it needs a special person to spend 1-2 hours to complete the production, the efficiency is low, and it cannot be directly applied in the clinic

[0005] 3. Due to the use of manual visual inspection, it is difficult for the above two methods to achieve local and overall uniformity of the thickness of the final impression material, and the production effect is greatly affected by the experience of the operator, which indirectly affects the accuracy of impression making

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