A kind of porcelain powder for pure titanium denture and its preparation method, porcelain facing

Abstract

The application discloses a facing porcelain powder for pure titanium dentures and a preparation method and facing porcelain thereof, the facing porcelain powder corresponding to the base glass does not contain SiO2, and solves the problem that the combination between the existing facing porcelain powder containing SiO2 and the pure titanium denture base is damaged, and the performance of the pure titanium denture after baking is affected. The facing porcelain powder is a pure glass phase, and the base glass is composed of the following components in terms of weight percentage and comprises the following components: B2O3, 56-58%; Al2O3, 20-22%; CaO, 8-10%; Na2O, 6-8%; K2O, 6-8%; the sum of the weight percentages of the components in the base glass is 100%; wherein, the CaO is introduced in the form of raw material CaCO3, the Na2O is introduced in the form of raw material Na2CO3, and the K2O is introduced in the form of raw material K2CO3.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical dental materials, in particular to a veneering porcelain powder for pure titanium dentures and a preparation method and veneering porcelain thereof. BACKGROUND

[0002] When a person's natural tooth is damaged, a dentist usually makes a dental restoration to reproduce the aesthetic and mechanical functions of the natural tooth. Metal porcelain teeth are the earliest dental restorations and have the longest clinical use history, and are still used in clinics.

[0003] Titanium metal has excellent mechanical properties and biocompatibility, and is therefore very suitable as a base material for metal porcelain teeth. Coating a veneering porcelain powder on a pure titanium denture base and performing porcelain baking can provide aesthetic properties for the pure titanium denture. The thermal expansion coefficient of the pure titanium denture base is usually 9.6x10 -6 ℃ -1 ~ 10.1x10 -6 ℃ -1 (room temperature ~ 500℃), so the thermal expansion coefficient of the veneering porcelain powder is required to be 9.0x10 -6 ℃ -1 ~ 9.5x10 -6 ℃ -1 (room temperature ~ 500℃), which is slightly lower than the thermal expansion coefficient of the pure titanium denture base, so that a compressive stress can be formed in the veneering porcelain after porcelain baking, thereby improving the strength of the veneering porcelain.

[0004] The current veneering porcelain powder composition for pure titanium dentures generally contains SiO2, which is easy to react with the pure titanium denture base to form a Ti5Si3 phase with poor mechanical properties, thereby damaging the bonding strength between the veneering porcelain after porcelain baking and the pure titanium denture base, affecting the performance of the pure titanium denture after porcelain baking. SUMMARY

[0005] The purpose of the present application is to provide a veneering porcelain powder for pure titanium dentures and a preparation method and veneering porcelain thereof, which does not contain SiO2 in the corresponding base glass, solving the problem of damaged bonding between the veneering porcelain powder containing SiO2 in the prior art and the pure titanium denture base, affecting the performance of the pure titanium denture after porcelain baking.

[0006] In a first aspect, the present application provides a veneering porcelain powder for pure titanium dentures, characterized in that the veneering porcelain powder is a pure glass phase, and the base glass is composed of the following components, including:

[0007]

[0008] The sum of the weight percentage of each component in the base glass is 100%; wherein the CaO is introduced in the form of raw material CaCO3, the Na2O is introduced in the form of raw material Na2CO3, and the K2O is introduced in the form of raw material K2CO3.

[0009] Optionally, the thermal expansion coefficient of the facing porcelain powder is 9.0*10 -6 ℃ -1 ~ 9.5*10 -6 ℃ -1 (room temperature~400℃), and the baking temperature is 760~790℃.

[0010] Optionally, the base glass of the facing porcelain powder is composed of the following components by weight percentage:

[0011]

[0012] The sum of the weight percentage of each component in the base glass is 100%.

[0013] In the second aspect, the application provides a facing porcelain for pure titanium dentures, which is baked from the facing porcelain powder as described in the first aspect.

[0014] In the third aspect, the application provides a preparation method of a facing porcelain powder for pure titanium dentures, which is used to prepare the facing porcelain powder as described in the first aspect, and the method comprises the following steps:

[0015] Mix B2O3, Al2O3, CaCO3, Na2CO3 and K2CO3 by weight percentage, and ball mill the mixture;

[0016] Melt the product obtained after ball milling, and then quench in water to obtain the base glass;

[0017] After drying the base glass, ball mill and crush it into a powder with a mesh size of 300~500 to obtain the facing porcelain powder.

[0018] The facing porcelain powder for pure titanium dentures provided by the application has the following beneficial effects: the base glass of the facing porcelain powder does not contain SiO2, and will not form Ti5Si3 phase with the base of the pure titanium denture, thereby avoiding damage to the combination between the facing porcelain after baking and the base of the pure titanium denture, and ensuring the performance of the pure titanium denture; at the same time, the thermal expansion coefficient of the facing porcelain powder is 9.0*10 -6 ℃ -1 ~ 9.5*10 -6 ℃ -1 (room temperature~500℃), which matches the thermal expansion coefficient of the base of the pure titanium denture, and can avoid the facing porcelain powder from falling off the base of the pure titanium denture. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The XRD pattern of the facing porcelain powder provided by the embodiment of the application after baking at 770℃ for 1 minute.

[0020] Figure 2 The flow chart of the preparation method of the facing porcelain powder for the pure titanium denture provided by the embodiment of the application. DETAILED DESCRIPTION

[0021] To make the purpose, technical solutions and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the application.

[0022] The facing porcelain powder for the pure titanium denture provided by the application is an amorphous glass phase, and the thermal expansion coefficient thereof can reach 9.0×10 -6 ℃ -1 ~ 9.5×10 -6 ℃ -1 (room temperature~400℃), and the baking temperature is 760℃~790℃, which fully meets the requirements of the thermal expansion coefficient and the baking temperature of the facing porcelain for the pure titanium denture base. Since the facing porcelain powder of the application does not contain SiO2, it will not react with the pure titanium denture base to form Ti5Si3 phase with poor mechanical properties, and will greatly improve the bonding strength of the facing porcelain and the pure titanium denture base, thereby improving the performance of the pure titanium denture.

[0023] The detailed description is as follows:

[0024] The application provides a facing porcelain powder for a pure titanium denture of a pure titanium alloy, and the facing porcelain powder is a pure glass phase, and the base glass is composed of the following components by weight percentage, including:

[0025]

[0026]

[0027] The sum of the weight percentages of the components in the base glass is 100%; wherein, CaO is introduced in the form of raw material CaCO3, Na2O is introduced in the form of raw material Na2CO3, and K2O is introduced in the form of raw material K2CO3.

[0028] Since the oxide layer on the surface of the pure titanium denture base will become unstable at above 800℃, the baking of the pure titanium denture base should be completed below 800℃. Since the thermal expansion coefficient of the pure titanium denture base is 9.6×10 -6 ℃-1 ~ 10.1 x 10 -6 ℃ -1 (ambient temperature ~ 500℃), so the thermal expansion coefficient of the veneer porcelain powder is required to be 9.0 x 10 -6 ℃ -1 ~ 9.5 x 10 -6 ℃ -1 (ambient temperature ~ 500℃) to avoid the veneer porcelain powder from falling off the pure titanium denture base. The B2O3 is added in the present application to make the veneer porcelain powder meet the requirement that the baking temperature should be lower than 800℃, the Al2O3 is added to make the veneer porcelain still be amorphous after the baking is completed, and the CaO, Na2O and K2O are added to increase the thermal expansion coefficient of the veneer porcelain to meet the requirement.

[0029] The present application provides a veneer porcelain for pure titanium denture, which is prepared by baking the veneer porcelain powder as described above.

[0030] As shown in Figure 2 , the present application provides a preparation method of a veneer porcelain powder for pure titanium denture, which comprises:

[0031] 201, mixing B2O3, Al2O3, CaCO3, Na2CO3 and K2CO3 according to the weight percentage, and ball milling the mixture.

[0032] 202, melting the product obtained after the ball milling, and then water quenching to obtain a base glass.

[0033] 203, drying the base glass, and then ball milling and crushing into a powder with a mesh size of 300 ~ 500 to generate the veneer porcelain powder.

[0034] The technical solution of the present application is further described below in combination with Table 1 and the Figure 1 The technical solution of the present application is further described below in combination with Table 1 and the

[0035] The base glass prepared in Example 1 is composed of the five components of B2O3, Al2O3, CaO, Na2O and K2O, and the sum of the mass percentage of each component is 100%. The present application achieves the technical effects that the thermal expansion coefficient of the veneer porcelain powder matches the thermal expansion coefficient of the pure titanium denture base, and the baking temperature is lower than 800℃, through the coordination between the components. The addition of B2O3 can make the veneer porcelain powder meet the requirement that the baking temperature should be lower than 800℃, the addition of Al2O3 can make the veneer porcelain powder still be amorphous glass phase after the baking is completed, and the addition of CaO, Na2O and K2O can increase the thermal expansion coefficient of the veneer porcelain powder to meet the requirement.

[0036] In the specific preparation process, according to the weight percentage of each component of the base glass in the examples listed in Table 1, the analytical pure B2O3, Al2O3, CaCO3, Na2CO3 and K2CO3 were weighed respectively, and then were mixed and ground by a planetary ball mill, and then were taken out and dried. The dried powder was placed in a platinum alloy crucible and was placed in a box-type resistance furnace, and was heated to 1300 DEG C under air atmosphere, and was kept at constant temperature for 2 hours, and then was poured into water at 1300 DEG C to obtain the base glass block. The base glass block was dried and then was ball-milled and crushed into a 300-500 mesh powder, which can be used as a facing porcelain powder for pure titanium denture base.

[0037] Figure 1 The XRD pattern of the facing porcelain powder obtained in Example 1 after being baked at 770 DEG C for 1 minute, and it can be seen from the figure that the facing porcelain powder after being baked is still an amorphous glass phase.

[0038] Table 1: Composition of base glass (weight percentage)

[0039]

[0040] The facing porcelain powder for pure titanium denture provided in the application has the following beneficial effects: the facing porcelain powder is a pure glass phase, and the base glass thereof does not contain SiO2, and will not form Ti5Si3 phase with the pure titanium denture base, thereby avoiding damage to the combination between the facing porcelain after being baked and the pure titanium denture base, and ensuring the performance of the pure titanium denture; at the same time, the thermal expansion coefficient of the facing porcelain powder is 9.0x10 -6 ℃ -1 ~ 9.5x10 -6 ℃ -1 (room temperature~500 DEG C), which is matched with the thermal expansion coefficient of the pure titanium denture base, and can avoid the facing porcelain powder from falling off the pure titanium denture base.

[0041] Although the application has been illustrated and described with specific embodiments, it should be realized that the above embodiments are only used to illustrate the technical solutions of the application, and are not used to limit the application; it should be understood by those skilled in the art that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced equivalently without departing from the spirit and scope of the application; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application; therefore, this means that all the replacements and modifications within the scope of the application are included in the appended claims.

Claims

1. A veneer porcelain powder for pure titanium dentures, characterized in that, The decorative porcelain powder is a pure glass phase, and its coefficient of thermal expansion is 9.0 × 10⁻⁶ under conditions of room temperature to 400°C. -6 ℃ -1 ~9.5×10 -6 ℃ -1 The porcelain firing temperature is 760℃~790℃; the base glass that forms the pure glass phase consists of the following components by weight percentage: B2O3 56%~58%; Al2O3 20%~22%; CaO 8%~10%; Na2O 6%~8%; K2O 6%~8%; The sum of the weight percentages of all components in the base glass is 100%; wherein, CaO is introduced in the form of raw material CaCO3, Na2O is introduced in the form of raw material Na2CO3, and K2O is introduced in the form of raw material K2CO3.

2. The decorative porcelain powder as described in claim 1, characterized in that, The base glass is composed of the following components by weight percentage: B2O3 57%; Al2O3 21%; CaO 9%; Na2O 7%; K2O 6%; The sum of the weight percentages of all components in the base glass is 100%.

3. A ceramic veneer for pure titanium dentures, characterized in that, The decorative porcelain is made by firing the decorative porcelain powder as described in any one of claims 1 or 2.

4. A method for preparing veneer porcelain powder for pure titanium dentures, used to prepare the veneer porcelain powder as described in any one of claims 1 or 2, characterized in that, The method includes the following steps: According to the aforementioned basic glass composition, raw materials B2O3, Al2O3, CaCO3, Na2CO3 and K2CO3 are mixed, and the mixture is ball-milled. The product obtained after ball milling is melted and then quenched in water to obtain the base glass. The base glass is dried and then ball-milled into powder of 300-500 mesh to generate the decorative porcelain powder.

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