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Additive manufacturing process

A technology of additive manufacturing and composition, applied in the field of additive manufacturing, can solve the problems of dimensional accuracy, dimensional accuracy, productivity and mechanical performance comparison

Active Publication Date: 2021-04-16
デンツプライデトレイゲゼルシャフトミットベシュレンクテルハフツング
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Therefore, although the mechanical properties of dental appliances are improved compared to conventional thermoplastic polymers by using composite materials, the dimensional accuracy, productivity and mechanical properties of the method according to WO2016 / 142323 cannot be compared with those of conventional subtractive methods. Compared with mechanical properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0275] Rely on bead mills to grind glass flakes:

[0276] The grinding vessel of the mill (Dyno-mill multi Lab, Willy A. Bachofen AG Maschinenfabrik) was filled with 450 mL of grinding beads (soda lime glass, 0.75-1 mm). 100 g of ECR ​​glass flake GF350 nmM without surface functionalization (from Glassflake Ltd., Leeds, UK) were dispersed in 1.5 L of water in a holding tank. A uniform dispersion is maintained by continuous agitation. The dispersion is pumped with a peristaltic pump to the grinding vessel and returned from the mill outlet to the storage tank. Once the particle diameter D 3,50 and D 3,99 When the desired value is reached, the milling is stopped.

[0277] To clean glass flakes:

[0278] When the unwashed glass flakes were added to dental compositions, a grayish paste was obtained. For better aesthetic results, the glass flakes can be cleaned before coating. For cleaning, the glass flakes can be stirred in twice the amount of 2.5% hydrochloric acid for ...

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Abstract

An additive manufacturing process comprising: (a) providing a curable composition comprising: (i) a filler comprising glassflakes having a diameter D3,99 as determined by light scattering in the range of from 5 to 150 microns; and (ii) one or more curable compounds; (b) controlling an apparatus to form an object by using the curable composition, whereby the curable composition passes a discharge orifice having a minimum diameter phi min, wherein the ratio of the minimum diameter of the discharge orifice to the diameter D3,99 of the glassflakes (phi min / D3,99) is in the range of 2 to less than 10; and wherein the median diameter D3,50 of the glassflakes is larger than the thickness of the glassflakes.

Description

[0001] field of invention [0002] The invention relates to an additive manufacturing method. Furthermore, the present invention relates to a cartridge for a 3D printer, and a kit of parts comprising a plurality of the specific cartridges of the present invention. Finally, the invention relates to a curable dental composition for use in the additive manufacturing method of the invention. [0003] The additive manufacturing method of the present invention can be used to prepare a wide range of solid objects. However, particular advantages are available from rapid chairside or laboratory preparation of dental appliances, which have excellent dimensional accuracy, aesthetics and mechanical properties, and avoid extensive manual finishing. [0004] Background of the invention [0005] Dental appliances such as restorations are often manufactured by subtractive milling and grinding methods, which use software-controlled milling and grinding machines to machine composite or ceramic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C13/00
CPCB29C64/10B29C64/209B33Y10/00B33Y70/00B33Y70/10B33Y80/00A61C13/0019A61C5/77C08K3/40C08K7/00C08K2201/003B29C64/259B29C64/112B29C64/118A61K6/77A61K6/887A61K6/17B29K2509/08
Inventor S·诺尔佩尔T·蒂格斯U·瓦尔兹C·韦伯
Owner デンツプライデトレイゲゼルシャフトミットベシュレンクテルハフツング
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