Methods for making provisional and long-term dental crowns and bridges

a technology applied in the field of making provisional and long-term can solve the problems of shape instability of polymeric materials, which are fixed to metal supports, and achieve the effect of improving the quality of dental crowns and bridges

Inactive Publication Date: 2011-04-07
SUN BENJAMIN JIEMIN +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0018]In another embodiment, a dental practitioner can make the dental restoration in the dental office. The restoration can be made while the patient is sitting in the dental chair. This method involves dispensing a heated polymerizable composite material into a hardened dental impression. The same composite material as described above can be used in this method. The practitioner positions the impression containing the composite material in the mouth of a patient so the material is molded over the targeted area that will receive the restoration. The material is allowed to cool and form a dimensionally shape-stable, uncured restoration. The impression containing the composite material is removed from the mouth. Then, the restoration is irradiated with light so that it cures and hardens. The restoration can be maintained within the impression material while it is being light-cured. Alternatively, the restoration can be removed from the impression material before it is light-cured.

Problems solved by technology

One shortcoming with such conventional dental prosthetics is that the polymeric material, which is fixed to the metal support, can have shape instability while it is uncured.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Oligomer

[0080]A reactor was charged with 1176 grams of trimethyl-1,6-diisocyanatohexane (5.59 mol) and 1064 grams of bisphenol A propoxylate (3.09 mol) under dry nitrogen flow and heated to about 65° C. under positive nitrogen pressure. To this reaction mixture, 10 drops of catalyst dibutyltin dilaurate were added. The temperature of the reaction mixture was maintained between 65° C. and 140° C. for about 70 minutes and followed by additional 10 drops of catalyst dibutyltin dilaurate. A viscous paste-like isocyanate end-capped intermediate product was formed and stirred for 100 minutes. To this intermediate product, 662 grams (5.09 mol) of 2-hydroxyethyl methacrylate and 7.0 grams of BHT as an inhibitor were added over a period of 70 minutes while the reaction temperature was maintained between 68° C. and 90° C. After about five hours stirring under 70° C., the heat was turned off, and oligomer was collected from the reactor as semi-translucent flexible solid and stor...

example 2

Preparation of Monomer

[0081]A reaction flask was charged with 700 grams of 1,6-diisocyanatohexane and heated to about 70° C. under a positive nitrogen pressure. To this reactor were added 1027 grams of 2-hydroxyethyl methacrylate, 0.75 gram of catalyst dibutyltin dilaurate and 4.5 grams of butylated hydroxy toluene (BHT). The addition was slow and under dry nitrogen flow over a period of two hours. The temperature of the reaction mixture was maintained between 70° C. and 90° C. for another two hours and followed by the addition of 8.5 grams of purified water. One hour later, the reaction product was discharged as clear liquid into plastic containers and cooled to form a white solid and stored in a dry atmosphere.

example 3

Preparation of Monomer

[0082]A reaction flask was charged with 168 grams of 1,6-diisocyanatohexane and heated to about 70° C. under a positive nitrogen pressure. To this reactor were added 228 grams of 2-hydroxyethyl acrylate, 0.12 gram of catalyst dibutyltin dilaurate and 0.86 grams of butylated hydroxy toluene (BHT). The addition was slow and under dry nitrogen flow over a period of two hours. The temperature of the reaction mixture was maintained between 70° C. and 85° C. for another three hours and followed by the addition of 0.9 grams of purified water. One hour later, the reaction product was discharged as clear liquid into plastic containers and cooled to form a white solid and stored in a dry atmosphere.

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Abstract

The invention provides methods of making provisional and long-term dental restorations, particularly dental veneers, crowns and bridges. In one embodiment, the restoration can be fabricated indirectly by a dental laboratory. In another version, a dental practitioner can make the restoration chairside for a patient in a dental office. A polymerizable dental composite material, which is dimensionally shape-stable in its uncured state, is used to make the restoration. A substructure such as a metal coping can be used to support the polymerizable material. The material includes a polymerizable acrylic compound, polymerization initiator system capable of being activated by light or heat, and preferably a filler material. The resulting dental restoration has good aesthetics, mechanical strength, and margins and contacts.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of U.S. Provisional Patent Application 60 / 848,117 having a filing date of Sep. 29, 2006, the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates generally to methods for making provisional and long-term dental crowns, bridges, inlays, onlays, veneers, implants, and other dental restorations. A polymerizable composite resin having good dimensional shape-stability is used to make the dental restoration. A substructure such as a metal coping, ceramic substructure, or fiber-reinforced polymeric substructure can be used to support the polymerizable material. In one method, the restoration can be fabricated indirectly by a dental laboratory and sent to a dentist for placing in the mouth of a patient. In another version, the dentist can make the restoration in the dental office directly. The restoration can ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61C5/10A61C13/003A61C5/77
CPCA61C13/0003A61C13/20Y10T29/49567A61C5/10A61C19/003A61C5/77
Inventor SUN, BENJAMIN JIEMINYOUNG, ANDREW MATHIASLICHKUS, ANDREW M.
Owner SUN BENJAMIN JIEMIN
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