DE102012108202B4 - A method of fusing a photocurable epoxy composite to a zirconia material surface - Google Patents

Abstract

A method of fusing a photocurable epoxy composite to a surface of a zirconia material sequentially comprising an inner dental crown portion surface treatment process and an automatic abrading process, wherein: the inner dental crown portion surface treatment process comprises: Step 1: coating a surface of a full ceramic cube zirconia dental crown portion with a first one Modifier, coating the first modifier with a second modifier, and fusing the first modifier and the second modifier at a temperature of 720 to 1050 ° C to the surface of the inner dental crown portion to thereby form a rough-surfaced layer having a thickness of 2 5 to 3.5 mm, wherein the first modifier is a shielding agent and the second modifier is quartz powder or zirconia powder; Step 2: coating the rough surface layer with a light-activated modifier, and irradiating the light-activated modifier with a long wavelength light having a wavelength of 1400 to 2000 nm, the light-activated modifier comprising an ethanol-siloxane-acetone mixture having a mixing ratio of 35- 45%: 5-25%: 40-60%; and Step 3: coating the photoactivated modifier with a photosensitive modifier, and irradiating the photosensitive modifier coated on the photoactivated modifier with a long wavelength light having a wavelength of 1600 to 2500 nm, the photosensitive modifier being a phosphoric acid monomer Lipoic acid mixture having a mixing ratio of 30-45%: 15-35%: 35-40%; and the automatic grinding process includes: ...

Description

The present invention relates to methods according to claims wherein a photohardened composite is bonded to the surface of an inner zirconia dental crown section by physical, mechanical or chemical means.

• 1. Aufschmelzen von Keramikpulver auf eine Metallbasis;
• 2. Mechanisches Verbinden eines Kunstharzverbundstoffs mit Oberflächenpartikeln einer Metallbasis;
• 3. Aufschmelzen von Keramikpulver auf eine Zirkonoxidbasis;
• 4. Erwärmen, Schmelzen und Spritzgießen von Aluminiumoxid und sodann Verbinden des Aluminiumteils mit einer Zirkonoxidbasis; und
• 5. Erwärmen, Schmelzen und Spritzgießen von Lithiumoxid und sodann Verbinden des Lithiumteils mit einer Zirkonoxidbasis.

An artificial tooth has, from bottom to top, a dental implant and a dental crown. At present, a dental crown may be formed by one of the following methods:

• 1. melting ceramic powder on a metal base;
• 2. mechanically bonding a synthetic resin composite to surface particles of a metal base;
• 3. melting ceramic powder on a zirconia base;
• 4. heating, melting and injection molding of alumina and then bonding the aluminum part to a zirconia base; and
• 5. Heating, melting and injection molding of lithium oxide and then bonding the lithium part to a zirconia base.

However, if a dental crown formed by one of the above methods has a surface fracture, the fracture can only be repaired with a suitable amount of denture material and the repaired dental crown will only last for a limited period of time. The reason for this is that the dental implant, dental crown, and prosthesis material are all rigid structures and can not absorb pressure, unlike the tissue of a natural tooth. In particular, the dental implant can not absorb pressure generated during chewing by a collision between the dental implant and an opposing natural tooth. Therefore, the prosthetic material is ultimately damaged.

To reduce the pressure due to the collision between the dental implant and an opposing natural tooth during chewing, the following common steps can be taken:
Step 1: A first modifier serving as a shielding agent is fused to the surface of an all-ceramic-zirconia dental crown portion, thus forming a first rough surface layer on the surface of the inner crown portion;

Step 2: A second modifier, such as quartz powder, is fused onto the first rough surface layer on the surface of the inner dental crown section to form a second rough surface layer on the first rough surface layer;

Step 3: A photoactivated modifier is applied to the second rough surface layer on the surface of the inner crown portion and is treated with long wavelength light to which it reacts; and

Step 4: A photosensitive modifier is applied to the surface of the photoactivated modifier and is treated with long wavelength light with which it reacts.

After completing the above steps, an outer tooth crown portion is formed on the photosensitive modifier by a photocurable epoxy composite. The outer tooth crown portion is then cured with a light of long wavelength. As is apparent from the above, in order to reduce the pressure generated during chewing between a dental implant and an opposing natural tooth, it is necessary to perform a large number of modifier reflowing operations until the photocurable epoxy composite is bonded to the surface of the inner dental crown portion can to form the outer tooth crown section. The photocurable epoxy composite from which the outer dental crown portion is formed serves to attenuate the pressure generated during chewing between a dental implant and an opposing natural tooth.

Relevant prior art is in JP 2010-142311 A disclosed.

The present invention discloses a method of fusing a photocurable epoxy composite to the surface of a zirconia material, which method comprises successively a surface treatment process for an internal crown portion and an automatic grinding process. The surface treatment process for the inner dental crown portion substantially comprises: successively coating the surface of the inner dental crown portion with a first modifier and a second modifier such that a rough surface layer is formed on the surface of the inner dental crown portion; and successively coating the rough surface layer with a light-activated modifier and a photosensitive modifier.

The subsequent automatic grinding process basically comprises: consecutively performing a scanning operation on the surface of the inner dental crown portion after completing the surface treatment process, a graphic creation process, and a data transfer operation by one form outer tooth crown portion by grinding; Sand blasting a lower surface of the outer tooth crown portion; Coating the lower surface of the outer crown portion with a light-activated modifier and a viscous light-curing epoxy composite; and connecting the outer tooth crown portion to the inner tooth crown portion.

Alternatively, according to the invention, the outer tooth crown section can also be formed by a stacking process, wherein a dentin layer, an enamel layer and a transparent layer are formed on the inner tooth crown section by a light-curing epoxy composite.

The technical features and advantages of the present invention are best understood from the following detailed description of some illustrative embodiments with reference to the accompanying drawings, in which:

1 Fig. 10 is a flowchart of the first embodiment of the invention;

2 schematically shows the surface treatment process of the inner tooth crown portion of the first embodiment;

3 schematically shows the automatic grinding process of the first embodiment;

4 Fig. 3 is a flowchart of the second embodiment of the invention; and

5 schematically shows the stacking process of the second embodiment.

First embodiment:

As in 1 1, the first embodiment has a surface treatment process of the inner dental crown portion (FIG. 1 ) and an automatic grinding process ( 2 ) on.

Referring to 2 indicates the surface treatment process of the inner dental crown section 1 following steps:
Step 1: The surface of an inner all-ceramic zirconia dental crown section ( 40 ) is coated with a first modifier (A), which is a shielding agent. The first modifier (A) is coated with a second modifier (B) such as quartz powder or zirconia powder having a grain size of 40 to 50 μm. The first modifier (A) and the second modifier (B) are applied to the inner crown portion at a temperature of 720 to 1050 ° C ( 40 ) melted to form a 2.5 to 3.5 mm thick rough surface layer. The shielding agent is made of dental ceramic and has surface components such as feldspar, quartz, kaolin, borax and sodium carbonate.

Step 2: The rough surface layer of the inner dental crown section ( 40 ) is coated with a light-activated modifier (C). The light-activated modifier (C) is irradiated with a long-wavelength light having a wavelength of 1400 to 2000 nm and reacted therewith, the light-activated modifier (C) comprising an ethanol-siloxane-acetone mixture having a mixing ratio of 35-45%: 5-25%: 40-60% is.

Step 3: The light-activated modifier (C) is coated with a photosensitive modifier (D), and the photosensitive modifier (D) is irradiated with a long-wavelength light having a wavelength of 1600 to 2500 nm and reacted therewith. The photosensitive modifier (D) is a phosphoric acid-monomer-lipoic acid mixture having a mixing ratio of 30-40%: 15-35%: 35-40%.

Referring to 3 follows the automatic grinding process ( 2 ) in the first embodiment, the preceding three steps and comprises the following steps:
Step 4: A scan ( 5 ) is at the inner tooth crown section ( 40 ) followed by a graphic creation process ( 6 ) to a graphic ( 40A ) of the inner dental crown section and a graph ( 41A ) of an outer tooth crown section.

Step 5: The graph ( 41A ) of the outer tooth crown section is transmitted to a computer numerical control machine (CNC machine) ( 7 ), wherein the outer tooth crown portion, the surface of the inner tooth crown portion ( 40 ), is formed by automatic grinding. In the process, a lower part of the outer tooth crown section ( 41 ) with a concave surface ( 410 ) formed the surface of the inner dental crown section ( 40 ) corresponds. Next, the concave surface ( 410 ) of the outer tooth crown section 41 blasted with sand and successively coated with a light-activated modifier and a viscous light-curing epoxy composite.

Step 6: The outer tooth crown section ( 41 ) from step 5 is applied to the inner tooth crown section ( 40 ) from step 3, and the fused product is irradiated twice with long wavelength light having a wavelength of 1400 to 2000 nm, each irradiation lasting 10 minutes. In this way, a tooth crown ( 4 ) with the light-curing epoxy composite, the is melted on the surface of a zirconia material, completed.

In the first embodiment, the surface roughness of a zirconia material (ie, the inner tooth crown portion (FIG. 40 )) simply by the inner tooth crown section ( 40 ) is coated with the said modifiers and the modifiers are melted and irradiated. As a result, the fusion between the inner dental crown portion ( 40 ) and the light-curing epoxy composite on the concave surface ( 410 ) of the outer tooth crown section ( 41 ) improved. In addition, pressure due to the collision between the dental implant and an opposing natural tooth during chewing can be effectively reduced to extend the life of the dental implant. Moreover, the time required to treat the surface of the inner crown portion is quite short, as described above.

Second embodiment:

Referring to 4 along with 5 Step 3 of the surface treatment process of the inner dental crown section ( 1 ) also from a stacking process ( 3 ).

As in 5 shown, the stacking process ( 3 ) performed after the step 3 of the first embodiment, the following steps:
Step 4: A photocurable epoxy composite is used to form an opaque dentin layer ( 410 ' ) on the photosensitive modifier D. The dentin layer ( 410 ' ) is irradiated for 4 to 8 minutes with a long wavelength light having a wavelength of 1400 to 2000 nm and thereby cured.

Step 5: A translucent enamel layer ( 411 ' ) is deposited on the surface of the dentin layer ( 410 ' ) is irradiated for 4 to 8 minutes with a long wavelength light having a wavelength of 1400 to 2000 nm, whereby the enamel layer ( 411 ' ) is hardened.

Step 6: A transparent layer ( 412 ' ) is deposited on the surface of the enamel layer ( 411 ' ) is irradiated for 7 to 10 minutes with a long wavelength light having a wavelength of 1400 to 2000 nm, whereby the transparent layer ( 412 ' ) is hardened. In this way, the dentin layer ( 410 ' ), the enamel layer ( 411 ' ) and the transparent layer ( 412 ' ) together an outer tooth crown section ( 41 ' ) on the inner tooth crown section ( 40 ).

In the second embodiment, the surface roughness of a zirconia material (ie, the inner tooth crown portion (FIG. 40 )) simply by the inner tooth crown section ( 40 ) is coated with the said modifiers and the modifiers are melted and irradiated. As a result, the fusion between the inner dental crown portion ( 40 ) and the light-curing epoxy composite of the outer tooth crown section ( 41 ' ) improved. In addition, pressure due to the collision between the dental implant and a natural tooth during chewing can be effectively reduced to extend the life of the dental implant. In addition, the time required to treat the surface of the inner crown portion is quite short.

In addition, the surface of the outer dental crown portion obtained in step 6 may be polished, waxed or contoured to improve aesthetics.

• 1. Die Oberflächenrauheit eines inneren Zahnkronenabschnitts auf Zirkonoxidbasis kann leicht erhöht werden, indem der inneren Zahnkronenabschnitt mit den genannten Modifikatoren beschichtet wird und die Modifikatoren aufgeschmolzen und bestrahlt werden, und die erhöhte Oberflächenrauheit verbessert die Verschmelzung zwischen dem inneren Zahnkronenabschnitt und einem lichthärtenden Epoxidverbundstoff. Außerdem ist die zum Behandeln der Oberfläche des inneren Zahnkronenabschnitts benötigte Zeit recht kurz.
• 2. Aufgrund seiner Materialeigenschaften kann der Epoxidverbundstoff den Druck, der zwischen einem Zahnimplantat und einem gegenüberliegenden natürlichen Zahn erzeugt wird, effektiv reduzieren und auf diese Weise die Lebensdauer des Zahnimplantats verlängern.

According to the above, the present invention has the following advantages:

• 1. The surface roughness of a zirconia-based inner dental crown portion can be easily increased by coating the inner dental crown portion with said modifiers and melting and irradiating the modifiers, and the increased surface roughness improves the fusion between the inner dental crown portion and a photocurable epoxy composite. In addition, the time required to treat the surface of the inner crown portion is quite short.
• 2. Due to its material properties, the epoxy composite can effectively reduce the pressure generated between a dental implant and an opposing natural tooth, thereby extending the life of the dental implant.

LIST OF REFERENCE NUMBERS

1

Oberflächenbehandlungsprozess des inneren Zahnkronenabschnitts

2

Automatischer Schleifprozess

Fig. 2

1

Oberflächenbehandlungsprozess des inneren Zahnkronenabschnitts

40

innerer Zahnkronenabschnitt

A

erster Modifikator

B

zweiter Modifikator

C

lichtaktivierter Modifikator

D

lichtempfindlicher Modifikator

Fig. 3

2

Automatischer Schleifprozess

4

Zahnkrone

5

Abtasten

6

Grafikerstellung

7

Übertragung

8

Verschmelzung

40

innerer Zahnkronenabschnitt

40A

Grafik des inneren Zahnkronenabschnitts

41A

Grafik des äußeren Zahnkronenabschnitts

41

äußerer Zahnkronenabschnitt

Fig. 4

1

Oberflächenbehandlungsprozess des inneren Zahnkronenabschnitts

3

Stapelungsprozess

Fig. 5

3

Stapelungsprozess

40

innerer Zahnkronenabschnitt

41'

äußerer Zahnkronenabschnitt

410'

Dentinschicht

411'

Zahnschmelzschicht

412'

transparente Schicht

Fig. 1

1

Surface treatment process of the inner dental crown section

2

Automatic grinding process

Fig. 2

1

Surface treatment process of the inner dental crown section

40

inner tooth crown section

A

first modifier

B

second modifier

C

light-activated modifier

D

photosensitive modifier

Fig. 3

2

Automatic grinding process

4

crown

5

Scan

6

graphics creation

7

transmission

8th

merger

40

inner tooth crown section

40A

Graphic of the inner dental crown section

41A

Graphic of the outer dental crown section

41

outer tooth crown section

Fig. 4

1

Surface treatment process of the inner dental crown section

3

stacking process

Fig. 5

3

stacking process

40

inner tooth crown section

41 '

outer tooth crown section

410 '

dentin

411 '

Enamel layer

412 '

transparent layer

Claims (8)

A method of fusing a photocurable epoxy composite to a surface of a zirconia material, sequentially comprising a surface treatment process of an internal crown portion and an automatic grinding process, wherein: the surface treatment process of the inner dental crown portion comprises: Step 1: Coating a surface of a full ceramic-zirconia dental crown section with a first modifier, coating the first modifier with a second modifier, and fusing the first modifier and the second modifier at a temperature of 720 to 1050 ° C to the surface of the inner Tooth crown portion so as to form a rough-surfaced layer having a thickness of 2.5 to 3.5 mm, wherein the first modifier is a shielding agent and the second modifier is quartz powder or zirconia powder; Step 2: coating the rough surface layer with a photoactivated modifier, and irradiating the photoactivated modifier with a long wavelength light having a wavelength of 1400 to 2000 nm, the photoactivated modifier comprising an ethanol-siloxane-acetone mixture having a mixing ratio of 35- 45%: 5-25%: 40-60%; and Step 3: coating the photoactivated modifier with a photosensitive modifier, and irradiating the photosensitive modifier coated on the photoactivated modifier with a long wavelength light having a wavelength of 1600 to 2500 nm, the photosensitive modifier comprising a phosphoric acid monomer monomer; Lipoic acid mixture with a mixing ratio of 30-45%: 15-35%: 35-40%; and the automatic grinding process comprises: Step 4: Scanning the inner dental crown section to create a graphic thereof and designing a graphic of an outer dental crown section; Step 5: forming the outer tooth crown portion corresponding to the surface of the inner tooth crown portion by grinding with an automatic grinder according to the graph of the outer tooth crown portion, the outer tooth crown portion having a lower part formed with a concave surface; Sand blasting the concave surface of the lower part of the outer tooth crown portion; and successively coating the sand-blasted concave surface with a light-activated modifier and a photocurable epoxy composite; and Step 6: Connect the outer dental crown section to the inner dental crown section, and irradiate a resulting product twice with a long wavelength light of 1400 to 2000 nm for 10 minutes each. The method of claim 1, wherein the photocurable epoxy composite of step 5 is in a viscous state. The method of claim 1, wherein the quartz powder and the zirconia powder have a particle size of 40 to 50 microns. The method of claim 1, wherein the shielding agent is made of dental ceramic and comprises feldspar, quartz, kaolin, borax and sodium carbonate. A method of fusing a photocurable epoxy composite to a surface of a zirconia material, sequentially comprising a surface treatment process of an internal crown portion and a stacking process, wherein: the surface treatment process of the inner dental crown portion comprises: Step 1: coating a surface of a full ceramic-zirconia dental crown portion with a first modifier, coating the first modifier with a second modifier, and melting the first modifier and the second modifier at a temperature of 720 to 1050 ° C on the surface of the inner tooth crown portion to thereby form a rough-surfaced layer having a thickness of 2.5 to 3.5 mm, the first modifier being a shielding agent and the second modifier being quartz powder or zirconia powder; Step 2: coating the rough surface layer with a light-activated modifier, and irradiating the light-activated modifier coated on the rough surface layer with a long wavelength light having a wavelength of 1400 to 2000 nm, the light-activated modifier comprising an ethanol-siloxane Acetone mixture with a mixing ratio of 35-45%: 5-25%: 40-60%; and Step 3: coating the photoactivated modifier with a photosensitive modifier, and irradiating the photosensitive modifier coated on the photoactivated modifier with a long wavelength light having a wavelength of 1600 to 2500 nm, the photosensitive modifier being a phosphoric acid monomer Lipoic acid mixture having a mixing ratio of 30-40%: 15-35%: 35-40%; and the stacking process comprises: Step 4: forming an opaque dentin layer on the photosensitive modifier through a photocurable epoxy composite, and irradiating the dentin layer for 4 to 8 minutes with a long wavelength light having a wavelength of 1400 to 2000 nm so as to harden the dentin layer becomes; Step 5: Forming a translucent enamel layer on the surface of the dentin layer and irradiating for 4 to 8 minutes with a long wavelength light having a wavelength of 1400 to 2000 nm, so that the enamel layer is cured; and Step 6: Forming a transparent layer on the surface of the enamel layer and irradiating for 7 to 10 minutes with a long wavelength light having a wavelength of 1400 to 2000 nm, so that the enamel layer is cured, and the dentin layer, the enamel layer and the transparent layer together form an outer tooth crown section. The method of claim 5, wherein a surface of the outer tooth crown portion of step 6 is further polished, waxed or conformed in shape. The method of claim 5, wherein the quartz powder and the zirconia powder have a particle size of 40 to 50 microns. The method of claim 5, wherein the shielding agent is made of dental ceramic and comprises feldspar, quartz, kaolin, borax and sodium carbonate.

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