Color changing matrix as wear indicator
First Claim
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1. A color-changing matrix comprising a layer including a mixture of a water-insoluble polymer, an undissolved water-soluble polymer comprising polyethylene oxide, and a water-leachable colorant that leaches from the matrix when the matrix is exposed to water to provide a change in color.
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Abstract
A sustained-release matrix for dental application includes either an anti-microbial agent or a colorant that is released from the matrix when the matrix contacts water. The preferred matrices include a water-soluble polymer and a water-insoluble support resin.
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Citations
15 Claims
- 1. A color-changing matrix comprising a layer including a mixture of a water-insoluble polymer, an undissolved water-soluble polymer comprising polyethylene oxide, and a water-leachable colorant that leaches from the matrix when the matrix is exposed to water to provide a change in color.
- 8. A color-changing matrix comprising a layer including a mixture of a water-insoluble polymer, a water-soluble homopolymer of polyethylene oxide, and a water-leachable colorant that leaches from the matrix when the matrix is exposed to water to provide a change in color.
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15. A color-changing matrix comprising a layer including a mixture of a water-insoluble polymer, an undissolved water-soluble polymer, and a water-leachable colorant that leaches from the matrix when the matrix is exposed to water to provide a change in color,
wherein the layer includes over 50% of the water-soluble polymer by weight.
Specification