JPH0282966A - Treatment of dental material - Google Patents

Abstract

PURPOSE:To perform arbitrary coloration treatment from white to gold and to form a beautiful tooth having high durability by heating a Ti-type dental material in an oxidizable atmosphere or liquid to oxidize the surface thereof and controlling a heated state. CONSTITUTION:A Ti-type metal material 1 obtained by applying die cast processing or injection processing to a Ti-alloy using a required tooth form is subjected to laser irradiation treatment in an oxidizable atmosphere. The irradiated point is rapidly heated to partially bring about melting or evaporation and an oxide film 4 is formed by the oxidizable atmosphere while fine craters are formed. The irradiation point is successively moved by NC control, following control or manual control and scanning irradiation is performed so as to perform required surface treatment to apply entire surface treatment to the whole or required part of the metal material. A surface oxidized state is different according to the energy of irradiation laser beam, a scanning speed or an atmospheric condition and various colors can be imparted to the metal material 1 by the thickness of the formed oxide layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to coloring surface treatment of dental materials made of Ti, Ti alloys, or Ti composite alloys.

[Prior art and problems]

Conventionally, Ti, TiPd, TiNi were used as dental materials.
.

Ti alloys such as Ti Ni MO, Ti RU, TiN
Ti-based materials, such as Ti composite materials, are highly corrosion-resistant and stable metal materials for the human body, so they are used as artificial tooth roots (implants), opaque base metals, tooth clasps, dental crown materials, etc. There is. However, Ti-based alloys generally have a dark color and are not aesthetically pleasing.

For example, when this Ti-based alloy is opaque treated as a base metal to form porcelain, the porcelain ceramic it adheres to is translucent, so the color of the base metal comes out, making it impossible to achieve a beautiful finish. . Also, this means that Ti
A similar problem has arisen in the treatment of the upper part of an artificial tooth root (implant) using an alloy based on the artificial tooth, excluding the implanted part, that is, the head and neck. The adhesive strength between metal and porcelain was also not sufficient.

[Means for solving problems]

The present invention was invented to improve the above points,
The material is heated by laser irradiation or the like in an oxidizing atmosphere or liquid to oxidize the surface, and the heating conditions are controlled to perform desired surface treatments such as coloring and roughening. do. Further, the Ti-based material is electrolytically treated or electrolytically discharged in an electrolytic solution to perform surface oxidation,
The present invention is also characterized in that the electrolytic state is controlled to perform a surface treatment for desired coloration.

[Effect]

By controlling the energy of the irradiated laser and controlling the electrolytic discharge voltage, the state of formation of the oxide layer on the material to be treated can be controlled, and various colors can be applied, making it possible to form the desired beautiful artificial teeth. can. In addition, since the surface of the material is simultaneously removed from gloss and roughened, the adhesion of the opaque layer is improved, and the implant is able to achieve good bone attachment through bone regeneration and improve retention.

〔Example〕

The present invention will be explained below based on the drawings of one embodiment. 1st
The figure shows an example of forming an opaque. 1 is a Ti-based metal base metal, and the Ti alloy is diamond cast and injection processed using the required tooth profile, and if necessary, further drilling and precision finishing are performed. . In addition, it is precisely formed by rolling, forging, drilling, cutting, pressing, welding, etc., and the surface has a dark color unique to Ti materials.

On the other hand, a laser irradiation process is performed in an oxidizing atmosphere 02 as shown in FIG. 2 is a laser oscillator, and 3 is a condensing irradiation lens, which irradiates the surface of the base metal 1 with condensed light. The irradiation point is rapidly heated, and the oxide layer 4 is formed in an oxidizing atmosphere while forming fine particles with some melting and evaporation.
begins to form. The irradiation point is sequentially moved by NC control, copying control, manual control, etc., and scanning irradiation is carried out so that the required surface treatment is performed, and the entire base metal or the required portion ← the entire surface is treated. The surface oxidation state varies depending on the energy of the irradiated laser beam, scanning speed, atmospheric conditions, etc.
Various colors can be imparted to the base metal 1 depending on the thickness of the oxide layer formed.

For example, when 99.9% pure Ti was subjected to laser irradiation treatment in an 02 gas atmosphere, the formation of an oxide layer and the coloring state were as shown in Table 1.

Table Loser output W H compound layer thickness Coloring 150
15000 or more White 2100 Red 100 1700 Pink 145
0 Green 1210 Purple 50 860 Yellow 460
For example, if a white treatment is performed using Blue 180, Brown 100, Gold or higher, the dark color peculiar to Ti-based metal will disappear, and a metal with a white surface can be obtained.

Next, as shown in Figure (B), the base metal is placed in a furnace and heated to form an opaque porcelain material, and an opaque layer 5 is formed by heating and firing. Since the opaque layer 5 has been processed to roughen the surface of the base metal 1 by the laser irradiation process in the previous step, it is possible to form an opaque layer that has a high degree of adhesion and is strongly bonded to the base metal. Following this opaque treatment, a porcelain layer 6 can be formed as shown in FIG. The porcelain building heat treatment is carried out at a temperature of about 750 to 950°C, and for example, an oxide layer 4 of about 15,000 layers is formed on the base metal 1 with a thickness of about 0.1 to 0.2 mm. 3 to 0.4111ra thick on the layer through the opaque layer 5 to a thickness of 0.6 to 0.1
A heated and fired porcelain layer 6 of about 1iI11 is formed. Using a mixture of feldspar and alumina as the porcelain material, we were able to form a porcelain layer as described above to obtain beautiful white, translucent teeth.

Furthermore, when T1 material mixed with 10% TiN was used as the base metal, it could be colored yellow and green, and it could also be colored pink. Also, Ti + 0.01%Pd + 0.01%
In the case of the Ru + 0.01% Y material, most of the coloring of the clothing 1 was possible.

Incidentally, for heating for coloring surface treatment, electron beams, ion beams, and other energy beams other than laser irradiation can be used, and induction heating, dielectric heating, heating in a similar furnace, etc. can be used.

Further, for the coloring surface treatment, the results shown in Table 2 were obtained when electrolytic discharge treatment was performed using 83 PO4 electrolyte.

Table 2 Discharge starting voltage V Oxide layer thickness Coloring 200
15000 or more White 150 210
0 Red 120 1700
pink 75 1450
Green 601210 Purple 50 860 Yellow 30
460 Blue 20 180
brown 10 100
Gold can also be colored by anodic oxidation using only electrolytic action without causing electrical discharge.

Fig. 2 shows an example of an artificial tooth root, which is an implant structure in which an artificial tooth is permanently attached to replace an extracted tooth.
It is a single metal structure consisting of a neck 9 that stands up from the implant, and a head 8 that is exposed in the oral cavity following the neck and serves as an abutment for the artificial tooth. The aforementioned T-based corrosion-resistant alloy material is also used for this implant material. Reference numeral 1a denotes a hole for bone regeneration formed on the blade surface in order to increase bone holding power.

FIG. 3 shows an improved implant 7 in which two blades are formed from the bridged base to the distal end so that they are substantially parallel to each other, and the head 8 is connected to the bridged base. 7b is a window for the alveolar bone to rise on the bridge surface.

FIG. 4 is a sectional view of the implant of FIG. 3 implanted into bone. Two parallel grooves are processed and formed in the alveolar bone 10 along the alveolar crest, and the tip of the blade is inserted and implanted therein. The tip of the blade penetrates the hard part 10a of the bone and reaches the soft part 10b.
It is implanted so that it is embedded in the body, and is firmly held by the hard part 10a. The artificial head 111 is fixed to the head 8 of the implant firmly implanted in the alveolar bone with cement and used.

In the case of the implant shown in FIGS. 2 and 3,
The head 8 and neck 9 are exposed in the oral cavity, and artificial teeth 11 are attached thereto.
Since the coloring of the implanted tooth 11 will be affected by the base metal of the head 8, at least the head 8 of the implant made of a Ti-based alloy material according to the present invention is bonded.
Then, by applying surface treatment such as laser or electrolytic discharge, and coloring the tooth to the same color as the artificial tooth or white, it is possible to finish the tooth as a whole with a beautiful color. or,
At the same time as coloring, laser, irradiation, discharge impact, etc. can roughen the surface of the implant, especially the head 8, and form microscopic pinholes, so that it can be bonded to the artificial tooth 11 extremely firmly and stably without loosening or coming off. You can get teeth. As mentioned above, the implant is made of Ti-based materials, especially Ti + 0.01% Pd + 0.01% Ru +
By using Ti material containing rare earth elements (including Mitshu metal) such as 0.01% Y, corrosion resistance is extremely high.
It blends well with the bone, has high retention properties, and can support teeth semi-permanently.

In addition, the present invention can perform surface treatment on dental metal materials made of various Ti-based alloys, and can provide beautiful colored teeth and highly durable teeth with strong adhesion through coloring and roughening. can.

〔Effect of the invention〕

As described above, the present invention provides surface treatments for coloring and roughening Ti-based dental materials such as TiJi alloys and Ti composite alloys by heating them by laser irradiation in an oxidizing atmosphere or in liquid; Coloring can be done by controlling the thickness of the oxide layer produced by controlling the heating conditions by controlling the irradiation energy, etc., and any coloring treatment from white to gold can be performed. Beautiful teeth can be created by opaque treatment and porcelain construction. It is possible to form highly durable teeth with high adhesive strength between base metal and porcelain. It is also extremely effective as a surface treatment for implant materials, tooth clasps, dental crown materials, and other dental materials.

Furthermore, in the present invention, an oxide layer can be formed and colored on the surface of a metal material by anodizing by electrolytically treating or electrolytically discharging a dental material in an electrolytic solution. By forming electric discharge marks on the surface, micro pinholes can be formed and the surface can be roughened, thereby providing beautiful teeth, high adhesive strength, and highly durable teeth.

[Brief explanation of the drawing]

FIG. 1 is a processing process diagram of one embodiment of the present invention, and FIGS. 2 to 4 are explanatory diagrams of other embodiments. 1... Metal base metal 2... Laser generator 3... Condensing lens 4... Oxide layer 5... Opaque layer 6... Porcelain layer 7... Implant part 8... Head Part 11......Artificial tooth (C)

Claims (3)

[Claims] (1) Surface oxidation is performed on dental materials made of Ti, Ti alloys, or Ti composite alloys by heating in an oxidizing atmosphere or liquid, and the heating conditions are controlled to perform surface treatment to give desired coloration. A dental material processing method characterized by: (2) Surface oxidation of Ti, Ti alloy, or Ti composite alloy dental materials by electrolysis or electrolytic discharge in an electrolytic solution, and controlling the electrolytic state to perform surface treatment for desired coloring. A dental material processing method characterized by: (3) The dental material processing method according to claim 1 or 2, wherein the head surface of an implant material made of Ti, Ti alloy, or Ti composite alloy is subjected to surface oxidation treatment.