# US 11,433,002 B2 · Dental liner and manufacturing method therefor

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- Number: US 11,433,002 B2
- Document ID: US11433002B2
- Status: Granted
- Kind: B2
- Application number: 16/639,519
- Filed: 2018-08-08
- Published: 2021-05-13
- Granted: 2022-09-06
- Earliest claimed: 2017-08-18
- Assignees: Kyungpook National University Industry-Academic Cooperation Foundation
- Applicants: Kyungpook National University Industry-Academic Cooperation Foundation
- Inventors: Tae Yub Kwon; Hee Sung Lee; An Na Seo
- Web page: https://patentgrep.com/patent/US11433002B2

## CPC

- A61K 6/40: Primers (for dental adhesives A61K6/30)
- A61K 6/816: comprising titanium oxide
- A61K 6/20: Protective coatings for natural or artificial teeth, e.g. sealings, dye coatings or varnish
- A61K 6/60: comprising organic or organo-metallic additives
- A61K 6/70: comprising inorganic additives
- A61K 6/80: Preparations for artificial teeth, for filling teeth or for capping teeth
- A61K 6/818: comprising zirconium oxide
- A61K 6/849: comprising inorganic cements
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)

## Abstract

A dental liner and a manufacturing method therefor are disclosed. The dental liner is a dental liner for coupling feldspar porcelain and zirconia and includes: silicon dioxide; aluminum oxide; 1,4-butanediol for maintaining the moisture of the dental liner and preventing the generation of layers; and a zirconia powder for coupling the dental liner and zirconia by strengthening chemical bonding of the dental liner and zirconia.

## Claims

### Claim 1

A dental liner for bonding feldspar porcelain and zirconia, the dental liner comprising:
silicon dioxide;
aluminum oxide;
1,4-butanediol for retaining moisture of the dental liner and preventing occurrence of layers; and
zirconia powder for reinforcing chemical bonding between the dental liner and the zirconia to bond the dental liner and the zirconia.

### Claim 2 (depends on 1)

The dental liner as claimed in claim 1, further comprising: cryolite for melting the dental liner at a temperature in a predetermined range, when the dental liner is bonded to the zirconia and then fired.

### Claim 3 (depends on 2)

The dental liner as claimed in claim 2, wherein the temperature in a predetermined range is 900° C. to 1000° C.

### Claim 4 (depends on 1)

The dental liner as claimed in claim 1, further comprising: bismuth oxide for imparting fluorescence to the zirconia,
wherein the bismuth oxide is dissolved in hydrochloric acid or nitric acid.

### Claim 5

A method of manufacturing a dental liner for bonding feldspar porcelain and zirconia, the method comprising:
mixing silicon dioxide, aluminum oxide, zirconia powder, and cryolite;
adding 1,4-butanediol for retaining moisture of the dental liner and preventing occurrence of layers and performing mixing; and
dissolving bismuth oxide for imparting fluorescence to the zirconia in hydrochloric acid or nitric acid and mixing the bismuth oxide dissolved in hydrochloric acid or nitric acid.

### Claim 6 (depends on 5)

The method of manufacturing a dental liner as claimed in claim 5, wherein the dental liner includes:
50 to 60 parts by weight of the silicon dioxide;
5 to 10 parts by weight of the aluminum oxide;
10 to 20 parts by weight of the zirconia powder;
5 to 10 parts by weight of the cryolite;
20 to 30 parts by weight of the 1,4-butanediol;
1 to 5 parts by weight of the bismuth oxide; and
1 to 5 parts by weight of the hydrochloric acid or nitric acid.