Dental resin modified glass-ionomer composition

A technology of acidic polymer and composition, applied in dentistry, dental preparation, dental prosthesis, etc., can solve the problem of low bonding strength of tooth structure

Inactive Publication Date: 2014-08-13
THE KERR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, prior RMGI cement compositions also have significantly lower bond strengths to tooth structures than resin cements used in combination with adhesives

Method used

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  • Dental resin modified glass-ionomer composition
  • Dental resin modified glass-ionomer composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Comparative Example 1 comprising Base Paste (B1) and Catalyst Paste (C1) was prepared for comparison purposes and represents the prior art. The catalyst paste (C1) contains only the acidic polymer (component (a)) and does not contain any acidic polymerizable monomer (component (b)).

[0070] When the base paste (B1) was mixed with the catalyst paste (C1) through a double-barrel syringe equipped with a static mixer, the mixed material gelled after 1'55" (1 minute 55 seconds) and "Post hardening (or setting). The cured composition of Comparative Example 1 had a compressive strength of 120.0±9.5 MPa, a shear bond strength of 0.0±0.0 MPa to the dentin matrix, and a shear bond strength of 0.0±0.0 MPa to the enamel. It was not uncommon for each of the 6 samples tested in the comparative test to fail to obtain measurable shear bond strength. For low shear bond strength samples (eg < 2 MPa), the shear bond test method used here may be sensitive to the pressure introduced duri...

Embodiment 2

[0072] Base paste (B1) and catalyst paste (C2) make up the composition of Example 2. The catalyst paste (C2) contained 3.89% by weight of an acidic polymerizable monomer (component (b)) in addition to the acidic polymer (component (a)). When the base paste (B1) was mixed with the catalyst paste (C2) through a double-barrel syringe equipped with a static mixer, the mixed material gelled after 2'05" and hardened (or set) after 4'10". ). The cured composition of Example 2 had a compressive strength of 128.0±11.0 MPa, a shear bond strength of 9.4±4.3 MPa to the dentin matrix and a shear bond strength of 6.6±5.0 MPa to the enamel.

Embodiment 3

[0074] Base paste (B1) and catalyst (C3) make up the composition of Example 3. The catalyst paste (C3) contained 8.89% by weight of acidic polymerizable monomer (component (b)) in addition to the acidic polymer (component (a)). When the base paste (B1) was mixed with the catalyst paste (C3) through a double-barrel syringe equipped with a static mixer, the mixed material gelled after 2'12" and hardened (or set) after 4'18". ). The cured composition of Example 3 had a compressive strength of 123.6±13.9 MPa, a shear bond strength of 16.5±3.1 MPa to the dentin matrix, and a shear bond strength of 15.7±6.0 MPa to the enamel.

[0075]Examples 1-3 above illustrate the benefits of dental RMGI compositions of the present invention comprising both an acidic polymer and an acidic polymerizable monomer, providing significantly increased adhesion to tooth structures over the prior art. In particular, the combination of acidic polymer and acidic polymerizable monomer provides comparable c...

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Abstract

The dental resin modified glass-ionomer composition includes an acidic polymer; an acidic polymerizable monomer selected from 4-(meth)acryloxyalkyltrimellitic anhydride, 4-(meth)acryloxyalkyltrimellitic acid, and a combination thereof; a non-acidic polymerizable monomer; a fluoroaluminosilicate glass filler; water; and at least one polymerization initiator system. The dental resin modified glass-ionomer composition is useful for a dental restorative composition, an endodontic composition, and / or an orthodontic composition, and provides significantly enhanced adhesive property toward tooth structure.

Description

technical field [0001] The present invention relates to dental resin modified glass ionomer compositions that provide enhanced adhesion to tooth structures. Background technique [0002] Dental cements are used to attach prosthetic devices, such as inlays, inlays, crowns or posts, to tooth structures so that diseased teeth can restore their function and aesthetics. Dental cements are also used to attach orthodontic devices, such as orthodontic brackets or orthodontic bands, to tooth structures to correct misaligned teeth or to adjust gaps between teeth. Dental cement is also used as a root canal sealant. [0003] When bonding restorative and orthodontic devices to tooth structures, there are a wide variety of types of dental cements available to the dentist, including, for example, (1) zinc phosphate cements, (2) zinc carboxylate cements, cement, (3) zinc oxide eugenol (ZOE) cement, (4) glass ionomer cement, (5) resin cement, and (6) resin-modified glass ionomer (RMGI ) c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K6/087A61K6/083A61K6/06A61K6/884A61K6/891
CPCA61K6/027A61K6/0091A61K6/083A61K6/77A61K6/831A61K6/887A61K6/889C08L33/08C08L33/10C08L33/26
Inventor X·钱X·陈
Owner THE KERR
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