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Dental machinable diatomite full ceramic restoration material and preparation method thereof

A repair material, diatomite technology, applied in dental preparations, dentistry, dental prostheses, etc., can solve the problems of low strength and affect the mechanical properties of materials, achieve good cutting performance, consistent strength and machinability, High toughness effect

Inactive Publication Date: 2012-09-26
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of diatomite is not high when it is initially formed, which affects the mechanical properties of the material.
So far, there is no report on the application of diatomite to dental all-ceramic materials

Method used

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  • Dental machinable diatomite full ceramic restoration material and preparation method thereof
  • Dental machinable diatomite full ceramic restoration material and preparation method thereof
  • Dental machinable diatomite full ceramic restoration material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: Preparation of 1100°C dental machinable diatomite all-ceramic material

[0033] 1. Select raw material composition (mass%): diatomaceous earth 30%, bentonite 15%, quartz 5%, 3Y-ZrO 2 20%, α-Al 2 O 3 15% and TiO 2 Whiskers 10%, soda ash 5%.

[0034] 2. Put the prepared raw materials into the agate ball milling tank at the volume ratio of raw materials: agate balls: ethanol=1:1:1, and wet ball mill for 6-8 hours.

[0035] 3. After drying the ball-milled powder, it is manually ground and passed through a 100-mesh sieve.

[0036] 4. Mix the powder under the sieve with 5% polyvinyl alcohol (PVA) alcohol solution in a volume ratio of 1:1, and then dry it.

[0037] 5. The dried material is manually ground again, and passed through a 100-mesh sieve to obtain the powder of the diatomite all-ceramic restoration material.

[0038] 6. Weigh 0.8 grams of the above-mentioned powder, put it into an open-petal mold, and dry-press and shape it under a pressure of 500 MPa, hold the press...

Embodiment 2

[0041] Example 2: Preparation of a pre-sintered dental machinable diatomite all-ceramic material at 700°C

[0042] Select raw material composition (mass%): diatomite 35%, bentonite 15%, quartz 5%, 3Y-ZrO 2 15%, α-Al 2 O 3 10% and TiO 2 15% whisker, 5% soda ash.

[0043] The prepared raw materials are charged into an agate ball milling tank with a volume ratio of raw materials: agate balls: ethanol=1:1:1, and wet ball milling for 6-8 hours.

[0044] After the ball milled powder is dried, it is manually ground and passed through a 100 mesh sieve.

[0045] The powder under the sieve is mixed with 5% polyvinyl alcohol (PVA) alcohol solution in a volume ratio of 1:1, and then dried.

[0046] The dried material is manually ground again and passed through a 100-mesh sieve to obtain the powder of the diatomite all-ceramic restoration material.

[0047] Weigh 1.6 grams of the above-mentioned powder, put it into a cylindrical mold, and dry-press and shape it under a pressure of 700 MPa, hold the p...

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Abstract

The invention discloses a dental machinable diatomite full ceramic restoration material and a preparation method thereof; the method comprises: diatomite is taken as raw material and is added with nano toughening agent, thus adjusting the strength and the toughness of the diatomite full ceramic material; the diatomite full ceramic restoration material comprises the components of raw materials by mass percent: 30-35% of diatomite natural soil, 10-15% of bentonite, 5-7% of quartz, 40-55% of nano toughening agent and 5-7% of pH regulator; wherein the nano toughening agent contains nano zirconia (ZrO2), aluminum oxide (Al2O3) and titanium dioxide (TiO2) crystal whisker; and the pH regulator is sodium carbonate. The preparation technique comprises: the raw materials are processed by ball-milling according to a certain mass ratio, dry pressing to be molded under 500-700MPa and sintering under the ordinary pressure at 700-1150 DEG C, so that the dental machinable diatomite full ceramic restoration material can be obtained. Compared with the prior art, the invention has the characteristics of low cost of the preparation technique, stable quality, good repeatability as well as excellent mechanical property and aesthetic performance, so as to meet the requirements of clinical oral full ceramic restoration.

Description

Technical field [0001] The invention relates to a dental machinable diatomite all-ceramic restoration material and a preparation method thereof. Background technique [0002] Tooth defects are caused by many reasons and are common diseases of the oral cavity. Although metal-ceramic restorations have been widely used in the restoration of tooth and dentition defects, because the metal bottom layer cannot transmit light, the porcelain restorations have inherent defects of unnatural color. With the development of society, more and more The less it can meet the aesthetic requirements of patients and dentists. All-ceramic restorations are favored for its color, shape, lifelike, good retention and edge sealing, good biocompatibility, stable chemical properties, etc.; in addition, the thermal expansion coefficient of all-ceramic materials is similar to that of the tooth structure, polishing and upper The porcelain surface of the glaze is smooth and clean, and the plaque is not easy to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K6/02A61K6/027
Inventor 顾宁章非敏刘梅梁慧周雪锋
Owner SOUTHEAST UNIV
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