Self hardening glass carbomer composition

A carbomer and self-hardening technology, applied in tissue regeneration, surgical adhesives, dental preparations, etc., can solve the problems of insufficient strength, wear sensitivity and poor aesthetics, and achieve low solubility, easy polishing, and short hardening the effect of time

Inactive Publication Date: 2006-07-26
健康玻璃基金会
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In summary, the glass ionomer compositions according to the prior art, in particular, are poor in sensitivity to wear and aesthetically
Moreover, they often exhibit insufficient strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The following compositions were prepared using the following ingredients:

[0045] (a) polydimethylsiloxane with dynamic viscosity of 1000cSt, represented by S20;

[0046] (b) conventional fluorosilicate glass powder; and

[0047] (c) Aqueous solutions of conventional polyacrylates.

[0048] The fluorosilicate glass powder and polyacrylate aqueous solution used to prepare the compositions were from 3MESPE's A3 APLICAP capsules.

[0049] The amounts of the various ingredients are listed in Table 1, where 5% by weight of additional fluorosilicate glass powder corresponds to about 0.015 g of fluorosilicate glass powder and where 0.0015 g of S20 corresponds to about 1.6% of additional liquid, Add to conventional aqueous polyacrylate solution (ca. 0.0920 g).

[0050] product

Embodiment 2

[0052] The composition prepared in Example 1 was evaluated for in vitro wear using the ACTA-Abraser, a three-body wear system designed to simulate the wear that occurs in the oral cavity (see de Gee et al., 1994, 1996). Two reference materials (IFMC and KPFA; KPFA is KetacMolar from 3M ESPE  ) as a comparative test. In the test, two wheels (the first wheel contains the sample to be tested, while the second wheel is the counter teeth) rotate in different directions, but there is a 15% difference in peripheral speed (called slip distance), and at the same time Close contact. The test sample is placed on the circumference of the first wheel. The force of the interaction of the two wheels is adjusted to be about 15N. Both wheels were placed in a slurry of rice flour and white rice husk sprayed in a buffer solution. In the abrasion test, food is squeezed between the wheels, creating scuff marks on the test sample, leaving an untouched area on either side of the control to test...

Embodiment 3

[0057] Solubility testing was performed in this example. The test was performed as follows. A hardened sample weight of about 0.4 to about 0.6 cm in diameter and about 1 to about 1.5 mm in thickness was determined as a reference. In the test, the samples were immersed in water of various pH values, where the pH was adjusted with citric acid. Tested at pH 2.5 as it is similar to the pH that exists between molars. The test runs for approximately 15 days. The weight of the test sample is determined at several time intervals, where a greater weight loss indicates a higher solubility of the material. Data are expressed as % solubility (calculated from original weight and weight loss at the indicated stages) and are shown in Table 3.

[0058] time (h)

[0059] As can be seen from the data in Table 3, the samples prepared according to the composition of the present invention have improved solubility properties compared with the commercially available material KPFA.

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Abstract

The present invention relates to a self hardening glass carbomer composition obtainable by treating a fluorosilicate glass powder with: (a) a poly(dialkylsiloxane) having terminal hydroxyl groups, wherein the alkyl groups contain 1 to 4 carbon atoms, (b) an aqueous acid solution, and (c) separating the treated fluorosilicate glass powder from the aqueous acid solution. The glass carbomer compositions according to the invention have for example good toughness and strength and excellent fluoride release, In addition, the glass carbomer compositions according to the invention do not show shrinkage or expansion, an essential property for providing fillings for cavities having high strength and long durability. Moreover, the glass carbomer composition according to the present invention has a lower sensitivity towards abrasion and wear, a greater stiffness, a smoother surface, a better colourfastness, a better adherence to e.g. bone tissue and a lower water sensitivity.

Description

technical field [0001] The present invention relates to a glass carbomer cement with enhanced properties, a method for preparing the glass carbomer cement, and clinical and dental applications of the glass carbomer cement Applications, including high stress applications, such as in dental restorations, dentin replacements, crown core configurations, ie as bone and dental cements, and their industrial applications. Background technique [0002] Glass ionomer cements are known in the art and have been used in clinical and dental practice for a considerable time, for example, as permanent filling materials. For example, US 4,376,835, incorporated by reference, discloses a calcium aluminum fluorosilicate glass powder having an average particle size of at least 0.5 μm, the level of calcium depletion at the surface of the powder particles relative to the calcium level in the central region of the powder particle, the Si at the surface of the powder particle...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/06C03C3/112C03C4/00C03C14/00
CPCC03C14/008A61K6/06A61K6/093C03C3/112A61L27/10A61K6/0023A61K6/0835C03C4/0007A61L24/0084A61L2430/02Y10T428/2993A61K6/17A61K6/77A61K6/849A61K6/896A61K6/889A61K6/30C08L83/10C08L83/04C08L33/08
Inventor 威廉·弗雷德里克·范登博斯雷蒙·尼古拉斯·布鲁诺·范杜伊恩
Owner 健康玻璃基金会
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