Unlock instant, AI-driven research and patent intelligence for your innovation.

Dental material

a technology of dental materials and gray cement, applied in the field of dental materials, can solve the problems of color damage in dental applications, un-esthetic gray cement, and color grayness of portland cement,

Inactive Publication Date: 2009-03-12
PRIMUS CAROLYN M
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention provides a white dental material, specifically a cement, that is free of iron oxide. This results in a more pure and accurate color for the material. The cement contains a specific amount of calcia, silica, alumina, and iron, with the amount of iron being minimized to ensure a white color. This material is useful for dental procedures that require a white cement."

Problems solved by technology

However, the composition of that Portland cement is gray in color.
This color is deleterious in dental applications.
The grayness of the cement produces a very un-esthetic result when the cement is visible through thin tissue, such as in the smaller teeth in pedodontics, or at the gum line.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014]A dental material such as a cement, restorative or the like, according to the invention, preferably has the following percentages by weight of components:

[0015]61 to 70% calcia

[0016]19 to 29% silica,

[0017]5 to 15% alumina and

[0018]0 to 0.5% iron.

[0019]Preferably the material contains less than about 0.5 percent by weight of iron, based upon 100 percent by weight of the material. More preferably, the material according to the invention is substantially free of iron oxide, meaning that it contains less than about 0.5 percent by weight of iron. Most preferably, the inventive material contains no iron. The material is visually observed to be white in color, and is therefore, more desirable in dental applications than gray-colored materials previously employed. A comparison of one embodiment of the present inventive material to known gray-colored materials is provided in TABLE I.

TABLE INormalized Composition of Cement SamplesUS ′547ColtonExemplary InventiveComponentPatentFast SetWh...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
weight percentaaaaaaaaaa
setting timeaaaaaaaaaa
set timeaaaaaaaaaa
Login to View More

Abstract

A white, substantially non-iron containing dental material formed from Portland cement. The material may be a dental cement, dental restorative or the like.

Description

RELATED APPLICATIONS[0001]This is a continuation application U.S. patent application Ser. No. 11 / 059,758 which is a continuation application of pending U.S. patent application Ser. No. 10 / 868,522 (Case TUL-LOMA-CON) filed on Jun. 14, 2004, which is a continuation application of pending U.S. patent application Ser. No. 10 / 038,786 (Case TUL-LOMA) filed on Jan. 3, 2002; which claims priority of U.S. provisional patent application Ser. No. 60 / 259,685 (Case TUL-LOMA) filed on Jan. 4, 2001.TECHNICAL FIELD[0002]The present invention is directed toward a dental material, such as a cement or a restorative material. More particularly, the invention relates to a dental material that is prepared with a Portland cement. Specifically, the invention is such a material that is substantially free from iron oxide, and which has a CaO content of from about 50 to about 75 percent by weight and an SiO2 content of from about 15 to about 25 percent by weight.BACKGROUND OF THE INVENTION[0003]U.S. Pat. No. ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): A61K6/00A61K6/027A61K6/06C04B7/02C04B7/32C09K3/00
CPCC04B7/02C04B7/32C04B2111/00215C04B2111/00836C04B2111/10A61K6/0606C04B2111/802A61K6/0091C04B7/527A61K6/77A61K6/851
Inventor PRIMUS, CAROLYN M.
Owner PRIMUS CAROLYN M