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Dental hydraulic cement comprising ultrafine calcium silicate particles with rapid hardening and suitable mechanical properties

A calcium silicate and dental technology, applied in dental preparations, dentistry, dental prosthesis, etc., can solve the problems of reduced particle size distribution, no obvious impact on compressive strength, negative impact on compressive strength and bending strength, etc.

Pending Publication Date: 2022-05-17
SEPTODONT OU SEPTODONT SAS OU SPECIALITIES SEPTODONT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reduction of the particle size distribution negatively affects the compressive and flexural strength
Addition of multi-walled carbon nanotubes improves mechanical strength by restoring flexural strength, but has no significant effect on compressive strength

Method used

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  • Dental hydraulic cement comprising ultrafine calcium silicate particles with rapid hardening and suitable mechanical properties
  • Dental hydraulic cement comprising ultrafine calcium silicate particles with rapid hardening and suitable mechanical properties
  • Dental hydraulic cement comprising ultrafine calcium silicate particles with rapid hardening and suitable mechanical properties

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0438] Example 1: Method of making ultrafine tricalcium silicate (UTCS) particles by mechanical milling

[0439] have gone through the general procedure described below, using RETSCH instruments Prepare UTCS pellets.

[0440] Material

[0441] The pulverized C3S particles used in the following examples were obtained by pulverizing coarse C3S with a Retch pulverizer. Coarsely ground C3S particles used in the following examples were obtained by further pulverizing the pulverized C3S particles with a Crusher Faure.

[0442] General procedure

[0443] In the first step, crushed or coarsely ground C3S particles mixed with isopropanol are added to the grinding chamber of the device. Then, add the grinding beads to the previous mixture. In the method of the invention, the grinding beads may be, for example, zirconia beads with a diameter of 0.4 mm to 0.8 mm. Second, grind for 20 minutes to 30 minutes. According to the invention, grinding can be carried out for a longer time...

Embodiment 1a

[0445] Example 1a: A general procedure was performed with 45 g of coarsely ground C3S particles, 30 mL of isopropanol and 90 g of grinding beads. use The apparatus was milled for 20 minutes at a milling speed of approximately 1900 rpm. Drying is performed at about 50°C.

[0446] Part II: Characterization of Ultrafine C3S Particles

Embodiment 2

[0447] Example 2: Characterization of the Ultrafine C3S (UTCS) Particles Obtained in Example 1a

[0448] Microscopy

[0449] The final powder of C3S particles after ultrafine grinding according to the method described in Example 1a has been compared with the original C3S particles (coarsely ground C3S) by optical microscopy, and the results are excellent.

[0450] figure 1 A significant reduction in the particle size of the ultrafine C3S particles is shown.

[0451] particle size

[0452] The particle size distribution of ultrafine milled C3S particles according to the method described in Example 1a has been compared with that of micronized C3S particles, coarsely ground C3S particles and pulverized C3S particles (Table 1).

[0453] Table 1 shows the d of each C3S particle 10 、d 50 and d 90 size:

[0454] C3S sample d 10 (μm)

d 50 (μm)

d 90 (μm)

crushed 2.0 17.0 330 Kibble 2.1 9.8 28.0 micronization 0.8 3.4 7.2 ...

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Abstract

The present invention relates to the provision of a dental restoration material from a dental hydraulic cement comprising ultrafine calcium silicate (UCS) particles in the presence of a limited amount of water such that the hydraulic cement hardens rapidly while providing a material with suitable mechanical properties, in particular high compressive strength, for dental restoration.

Description

technical field [0001] The present invention relates to the field of dentistry. In particular, the present invention relates to the provision of dental restorative materials obtained from dental hydraulic cement comprising ultrafine calcium silicate (UCS) particles in the presence of a limited amount of water such that the hydraulic cement Hardens rapidly while providing a material with suitable mechanical properties for dental restorations, especially high compressive strength. The UCS particles used in the dental hydraulic cement of the present invention have a finely tuned d 10 、d 50 and d 90 size and specific surface area. Background technique [0002] Dental restoration aims to restore the integrity and form of the tooth, including repairing the loss of mineralization caused or caused by external trauma. Direct restorations are performed by placing a formable filling material into the prepared tooth and then allowing the material to set in situ. [0003] Ideally, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/02C04B7/38C04B7/52C04B28/04A61C5/64A61C5/77A61K6/71A61K6/818A61K6/822A61K6/851A61K6/853A61K6/876C04B111/82
CPCC04B7/02C04B7/38C04B7/52C04B28/04A61K6/876A61K6/853A61K6/71A61K6/851A61K6/822A61K6/818A61C5/64A61C5/77C04B2111/00025C04B2111/00836C04B2111/82C04B2201/50C04B22/064C04B14/28C04B14/306C04B14/308C04B28/02C04B28/34C04B14/043C04B14/30C04B20/008C04B40/065C04B2103/0094C04B2103/12C04B2103/302C04B2103/40C04B2103/54C04B22/124C04B24/2647C04B14/305C04B14/368C04B22/10C04B22/16A61K6/76
Inventor 吉勒斯·理查德奥利维尔·玛丽克里芒斯·科奥
Owner SEPTODONT OU SEPTODONT SAS OU SPECIALITIES SEPTODONT