A method for improving the metal-ceramic bonding strength of titanium alloy porcelain-fused-to-metal crowns

A combination strength, titanium alloy technology, applied in dentistry, pharmaceutical formulations, dental preparations, etc., can solve the problems of ceramic layer crack failure, poor linear expansion coefficient, high residual stress, etc., to inhibit high temperature oxidation and reduce surface stress , strong effect

Inactive Publication Date: 2021-02-23
THE FIRST AFFILIATED HOSPITAL OF ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, titanium alloys are used as metal-ceramic crowns, and there are the following problems: ① The chemical properties of titanium are relatively active. When the temperature is above 600 ° C, a loose and porous oxide film is easily formed on the surface, and a weak titanium-ceramic interface area appears. It is very easy to tear and peel off from the surface of titanium alloy, causing the ceramic layer to crack and fail; ②There is a large difference in linear expansion coefficient between titanium alloy and existing dental ceramic materials, and the metal-ceramic bonding interface has high residual stress, which is prone to porcelain collapse Phenomenon

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for bonding strength of a titanium alloy porcelain-fused-to-metal crown, comprising the following steps:

[0023] 1) Surface pretreatment, including the following steps: ①Preparing titanium alloy inner crowns according to the dental model, polishing the surface of the titanium alloy porcelain-fused-to-metal crowns with sandpaper, and performing degreasing treatment; Rinse with deionized water and blow dry;

[0024] 2) B-N-ZrO doped with mixed rare earths 2 Composite penetration, comprising the following steps: ① preparation of compound penetration agent: its chemical composition is calculated by mass percentage: B 4 C 3.5%, (NH 2 ) 2 CO 2.5%, KBF 4 5%, Nano ZrO 2 (particle size of 50-100nm) 5%, mixed rare earth (containing Ce 50%, La 20%, Nd 18%, Pr balance in mass percentage) 1%, NaF balance; Put the inner crown into the infiltration agent and place it in a vacuum heating furnace; ③ keep warm at 550-650°C for 3 hours; ④ keep warm at 850-920°C for 6 hour...

Embodiment 2

[0027] A method for bonding strength of a titanium alloy porcelain-fused-to-metal crown, comprising the following steps:

[0028] 1) surface pretreatment, carry out by embodiment 1;

[0029] 2) B-N-ZrO doped with mixed rare earths 2 Composite penetration, comprising the following steps: ① preparation of compound penetration agent: its chemical composition is calculated by mass percentage: B 4 C 4%, (NH 2 ) 2 CO 2%~4%, KBF 4 5.5%, Nano ZrO 2 (particle size of 50-100nm) 6.5%, mixed rare earth (containing Ce 50%, La 20%, Nd 18%, Pr balance in mass percentage) 1.3%, NaF balance; Put the inner crown into the infiltration agent and place it in a vacuum heating furnace; ③ keep warm at 550-650°C for 3 hours; ④ keep warm at 850-920°C for 6 hours;

[0030] 3) According to the sintering procedure of conventional metal-ceramic restorations, the cemented porcelain, opaque porcelain, and body porcelain are sintered sequentially on the porcelain-fused-to-metal crown. According to the ...

Embodiment 3

[0032] A method for bonding strength of a titanium alloy porcelain-fused-to-metal crown, comprising the following steps:

[0033] 1) Surface pretreatment, including the following steps: ①Preparing titanium alloy inner crowns according to the dental model, polishing the surface of the titanium alloy porcelain-fused-to-metal crowns with sandpaper, and performing degreasing treatment; Rinse with deionized water and blow dry;

[0034] 2) B-N-ZrO doped with mixed rare earths 2 Composite penetration, comprising the following steps: ① preparation of compound penetration agent: its chemical composition is calculated by mass percentage: B 4 C 4%, (NH 2 ) 2 CO 3%, KBF 4 6.2%, Nano ZrO 2 (particle size of 50-100nm) 7.5%, mixed rare earth (containing Ce 50%, La 20%, Nd 18%, Pr balance in mass percentage) 1.8%, NaF balance; Put the inner crown into the infiltration agent and place it in a vacuum heating furnace; ③ keep warm at 550-650°C for 3 hours; ④ keep warm at 850-920°C for 6 ho...

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Abstract

The invention provides a method for improving the bonding strength of a titanium alloy baked porcelain tooth inner crown and metal-porcelain, a 100 to 200 mu m protective permeation layer is preparedon the surface of the titanium alloy tooth inner crown through complex permeation chemical heat treatment of B-N-ZrO2 doped with mixed rare earth on the surface of the titanium alloy tooth inner crown. The formula of a complex permeation agent comprises the following component in percentage by mass: 3% to 5% of B4C, 2% to 4% pf (NH2)2CO, 5% to 8% of KBF4, 5% to 10% of nanometer ZrO2(particle sizeof 50 to 100 mu m), 1% to 2% of mixed rare earth (including 50% of Ce, 20% of La, 18% of Nd and the rest of Pr in percentage by mass), and the rest of NaF; and the process conditions are: Maintainingthe temperature at 550 to 650 DEG C for 3 hours, then raising the temperature to 850 to 920 DEG C and maintaining the raised temperature for 6 hours. The method provided by the invention is simple, and can effectively improve the bonding strength of a titanium alloy tooth inner crown and dental porcelain metal-porcelain.

Description

technical field [0001] The invention belongs to the technical field of medical new material processing, and in particular relates to a method for improving the bonding strength of a titanium alloy porcelain-fused-to-porcelain dental crown. Background technique [0002] Tooth or dentition loss or defect is a common and frequently-occurring disease in human dentistry, which affects people's chewing and pronunciation functions. According to statistics, nearly 70% of people in my country suffer from missing or defective teeth or dentition. With the gradual improvement of people's living standards and the enhancement of patients' awareness of treatment, dental clinics and scientific research have developed rapidly, and the application of metal-ceramic teeth has become more and more extensive. Porcelain-fused-to-metal teeth are oral restorations formed by fusing ceramic powder to composite material substrates at high temperatures. The material is melted to form a restoration sim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K6/84A61K6/842A61K6/818A61K6/802A61K6/829A61K6/20
CPCA61K6/20A61K6/802A61K6/818A61K6/829A61K6/84A61K6/842
Inventor 贾占奎丁亚飞姚文诚李松超孙科杨锦建金志波郝钢
Owner THE FIRST AFFILIATED HOSPITAL OF ZHENGZHOU UNIV
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