KR101382382B1 - Disk-shaped Composite Resin Block for Indirect Restoration - Google Patents

Abstract

DETAILED DESCRIPTION OF THE INVENTION The present invention is a dental composite resin block, which is capable of manufacturing a large number of indirect restoration blocks and a large number of restorations in a single process, and has a dental composite resin block characterized in that the disk has a height-to-radius ratio of 5 or less. To provide.

Description

Disk-shaped Composite Resin Block for Indirect Restoration

DETAILED DESCRIPTION OF THE INVENTION The present invention is a dental composite resin block, which is capable of manufacturing a large number of indirect restoration blocks and a large number of restorations in a single process, and has a dental composite resin block characterized in that the disk has a height-to-radius ratio of 5 or less. It is about.

In general, if a tooth is lost due to damage or deficiency due to dental caries or fracture, a great obstacle to pronunciation, writing, and aesthetics occurs. In addition, when the adjacent teeth move to the empty space without teeth, the normal arrangement of the teeth starts to shift, food is caught between the teeth, tooth decay or flavor occurs, and a bad smell occurs. In particular, damage or deficiency of the molars may cause malnutrition because of poor eating. Damage or deficiency of the incisors causes aesthetic problems. In addition, the probability of secondary caries on the damaged or missing parts is dramatically increased.

At present, chewing and aesthetic treatments are performed to patients caused by damage or defects of teeth through dental restoration or prosthesis, which is a tooth replacement treatment. In addition, according to the treatment method, the dental restoration can be largely divided into direct restoration and indirect restoration. Direct restoration is used for small areas that can be restored in the oral cavity. The curing method also uses chemical curing and photocuring. Typical indirect restoration prosthesis fabrication can use a variety of materials and hardening methods.

In dental restorations, repair is the removal of the affected area of a tooth that requires treatment due to partial damage due to caries or fracture of the tooth, and sealing with a tooth replacement material in the formed cavity. It is a restorative material.

Dental restorative material is a core dental material that is used for a very wide range of areas such as orthodontics and aesthetic dentistry, in addition to general dental procedures for repairing or fixing the entire crown and tooth damage caused by caries or fractures of teeth. Is one of.

The dental restorative material requires various characteristics unlike the general material due to the special environment in the oral cavity. In other words, there are many problems such as wet environment close to 100% relative humidity, high occlusal pressure generated during chewing, rapid temperature change, close contact with living tissue, frequent side effects such as hypersensitivity, It should be manufactured considering the factors of the branch. In addition, in order to reflect the individual's high aesthetic needs due to the recent development of the mass media, color harmony with hemorrhoids, etc. should also be considered.

In order to minimize the side effects of tooth loss, the prosthetic procedure uses artificial substitutes such as fixed prostheses (crown, bridge) or removable prostheses (prostheses that can be inserted into or removed from the mouth; dentures, partial dentures). It is to make. A fixed prosthesis is a method of covering a prosthesis by grinding about 1.0 to 1.5 mm of the surface of adjacent natural teeth in front of and behind the missing teeth. Because of the ease of pronunciation, no foreign matter, and high chewability, like natural teeth, it tends to be repaired with crowns or bridges without false or partial dentures where possible. Removable prostheses are indispensable when the rearmost teeth, or many teeth, are lost and there is a lack of sound abutment for use in fixed prostheses. Although the treatment period is short and inexpensive, the foreign matter is large and the chewing efficiency is greatly reduced by 1/4 to 1/10.

Dental prostheses are often used as a substitute for dental structures with custom materials. Common dental prostheses include restorations, supplements, inlays, onlays, veneers, full and partial crowns, bridges, implants, posts, etc. Can be mentioned. The prosthesis is produced by a technician, a professional manufacturer who is skilled in laboratories that can be manufactured by hand or by a skilled dentist.

Materials used to fabricate dental prostheses generally include gold, ceramics, amalgam, porcelain, PFM, PFG, composites, and the like. Until recently, low cost and long life amalgams were preferred for dental restorations and prostheses. However, since amalgam has a natural color of mercury, it is inferior to aesthetics with teeth, and toxicity and environmental pollution to a human body have become a problem. Gold is used for large fillings or inlays, but as with amalgam, the gold-replacement substitute still suffers from its lack of aesthetics with the original tooth. Because of this, dentists are changing the color of the materials to ceramic or polymer-ceramic composites that naturally match the color of the teeth.

Aesthetic prosthesis refers to any procedure that artificially creates, attaches, or covers teeth, most similarly to natural teeth, after the removal of some or all of the teeth. In addition to orthodontic treatment, esthetic prosthetic treatments can solve this problem when aesthetically important areas, such as incisors, are strangely shaped or misaligned, or when colors are dark or colored. Representatives include Laminate, PFG, Collarless (made of porcelain only in the crown of the gum economy), complete ceramics, and bridges. Recent aesthetic dentistry is a step forward treatment that not only eliminates oral morbidity but also aesthetic appearance of the oral cavity.

Traditional dental prosthesis manufacturing procedures require a minimum of two dental visits to the patient. At the first visit, it is a rubber-like product that impresses teeth and teeth. After that, the prosthesis is made of metal, ceramic, or composite material, and after the completion of manufacturing, it is comfortably matched with the patient's oral condition. The dental prosthesis manufacturing period takes a period of 1 day to 2 days or more, and since the technician is manufactured by hand during the production of the dental prosthesis, it can be said to be labor-intensive requiring high technology and finesse.

Recent advances in technology have led to the emergence of computer automation equipment such as optics, digitizers, mechanical milling machines, and CAD / CAM, which has significantly shortened the laboratories' area of work and the production of dental prostheses. Such computer automation equipment produces dental prostheses by cutting, milling and crushing into almost accurate shapes and forms of the required restorations at faster speeds and lower labor requirements than conventional manual methods. CAD / CAM devices include ce.novation (Inocermic, Germany), Ceron (Degudent, Germany), Cerec 3D (Sirona, Germany), Cerec InLab (Sirona, Germany), Decim (Cad.esthetcs, Sweden), DigiDent (Girrbach, Germany), etkon (etkon, Germany), Everest (Kavo, Germany), Evolution 4D (D4D Technologies, USA), GN-1 (GC international, Japan), Lava (3M ESPE, Germany), Medfacturing (Bego Medical, Germany) ), Pricident DCS (DCS, Switzerland), Perfactory (DeltaMed, Germany), Procera Biocare, Sweden), Pro 50 (Cynovad, Canada), Wol-Cram (Wol-Dent, Germany), Xawx (Xawex, Switzerland), ZEN Commercially available including -CAM (ZFN, Germany), ZirkonZahn (Steger, Italy) and the like.

The manufacture of dental prostheses using a CAD / CAM device typically involves the use of a "mill blank", ie, a solid block of material from which the prosthesis is cut or carved. Mill blanks are typically made of ceramic material. VITA CELAY ™ porcelain blanks, VITA Mark II Pitablocks ™ and PITA IN-CERAM ™ ceramic blanks (Vita CEfab, Vaita, Germany) There are a variety of commercially available mill blanks, including Zahn Fabrik). In addition, machineable mica ceramic blanks (eg, Corning MACOR ™ blanks and Dentsply DICOR ™ blanks) are commercially available.

In this regard, U.S. Patent Application Publication No. US2003 / 0031984 discloses ceramic dental mill blanks, but ceramic dental mill blanks are defined as mill blanks using CAD / CAM. The material is very hard and has the disadvantages of excessive wear on the tool and a long time for prosthetic dental prosthesis, and relatively high manufacturing costs due to excessive wear of the tool.

In US Patent No. 6,899,948, nano-sized silica particles were applied to improve visual opacity and mechanical strength. However, the application of nano-size silica particles having an average size of 200 nm or less has a disadvantage in that it is difficult to prepare uncured mill blanks due to lack of rheological properties in the dental composition.

US Patent No. 7,255,562 discloses a dental mill blank consisting of a polymeric resin matrix and a filler. The dental mill blank has suppressed crack generation generated during mill blank manufacture and has excellent cuttability and hardness.

However, even in the patent experiments, large cracks are still produced (internal cracking). This is because the self-stress to the polymerization shrinkage rate due to photocuring could not be controlled. Usually, the direction of polymerization shrinkage is directed toward the center of gravity of the self-polymerization type and the direction of the light source to the photopolymerization type. The weak intermolecular bonds (van der Waals interactions) between the monomers before the polymerization process are transformed into strong covalent bonds through photopolymerization, which results in a certain amount of shrinkage. The force of shrinkage is very strong, causing blank margins or cracks in the material itself. In the case of the self-polymerizing type, the shrinkage stress buffering effect due to the bubbles contained in the composite resin mixing process and the gel point of the composite resin are not as sharp as the photopolymerization, so they are cured by dispersing the stress. Much lower than

The total energy required for polymerization is expressed as the product of light intensity and time, and is polymerized in proportion to this amount. After all, if rapid hardening affects the shrinkage, in order to reduce the stress of the polymerization shrinkage, the polymerization may be performed for a long time with weak light. In order to reduce the stress due to polymerization shrinkage, the methods based on this principle are relatively weakly irradiated with light intensity, so that the curing of the mill blank proceeds slowly as in autopolymerization, dispersing the internal stress or delaying the complete curing of the mill blank. It is a method of finally polymerizing after waiting a certain time after induction of weak bonding or hardening. Although it is mentioned in US Patent No. 7,255,562, this does not cause hardened / uncured portions or lowered crack incidence because light is not transmitted to the inside of a large size mill blank.

Therefore, there is a need for development of a dental composite resin block of a large size having no physical properties without cracks.

The present invention aims to solve the problems of the prior art as described above and the technical problems that have been requested from the past.

Accordingly, the inventors of the present application, after extensive research and various experiments, have found a correlation between the ratio of the height to the radius and the internal crack and have completed the present invention.

Accordingly, the dental composite resin block according to the present invention is capable of manufacturing a large number of restorations by indirectly manufacturing a block for a large size and in a single process, and has a disk shape having a ratio of height to radius of 5 or less.

In general, dental composite resin blocks are prepared by filling a dental composite resin paste into a suitable mold and curing. In this process, about 2 to 5% of shrinkage occurs upon curing. The stress generated by the polymerization shrinkage causes cracks in the resin block.

In particular, it was confirmed that the stress in the contact surface with the mold is increased by the surface bonding force existing on the surface of the paste and the mold. In order to solve this problem, the mold material was changed or a release material was used, but it could not be solved. Accordingly, the inventors of the present application confirmed that the method of minimizing the contact area with the mold after various experiments can prevent the crack of the resin block.

That is, since the resin paste is filled in the mold having an open top, the greater the radius-to-radius, the greater the contact area with the mold, so that the polymerization shrinkage stress is large. On the contrary, the smaller the height relative to the radius, the smaller the contact area with the mold, so that the polymerization shrinkage stress is smaller.

The ratio of the height to the radius can be appropriately adjusted according to the use of the work, but non-limiting example, preferably 5 or less. In general, even if the ratio of the height to the radius exceeds 5, there is no big problem in the production of the small size composite resin blocks, but internal cracks may occur in the production of the composite resin blocks of the size capable of manufacturing the large size indirect restorative blocks, etc. do.

In the case of manufacturing a large size resin block, the smaller the ratio of the height to the radius is advantageous for the same reason as described above. Therefore, preferably, the ratio of the height to the radius may be 3 or less, and when the ratio of the height to the radius is 2 or less, since the width of the resin block is more than the height, cracks may be further prevented.

The composite resin block may be a monomer and / or oligomer including an unsaturated double bond; Polymerization initiators for initiating polymerization; And it may include a resin composition comprising a filler.

The size of the particles used in the resin composition is not limited, but a preferable example may be 0.3 to 3 ㎛. In general, it is necessary to exhibit physical properties of at least 150 Mpa of flexural strength and 350 Mpa of compressive strength for dental bridge processing. Composite resins using particles larger than 3 μm exhibit relatively rapid decreases in bonding strength and physical properties, and are not desirable because of rapid wear and processing time of the processing tool during CAM processing. Moreover, the composite resin block composition which uses the particle | grains of size smaller than 0.3 micrometer is not preferable because a viscosity is high and internal bubble cannot be removed, and there exists a problem in workability.

The monomer and / or oligomer including the unsaturated double bond may exhibit mechanical strength as a dental material, and are not particularly limited as long as they are polymerizable. Preferably, methyl methacrylate (MMA) -based material may be used.

The MMA monomers include 2,2-bis- (4- (2-hydroxy-3-methacryloyloxypropoxy) phenyl) propane (Bis-GMA), ethylene glycol dimethacrylate (TGDMA), tri Ethylene Glycol Dimethacrylate (TEGDMA), Ethoxylate Bisphenol A Dimethacrylate (Bis-EMA), Urethane Dimethacrylate (UDMA), Dipentaerythritol Pentaacrylate Monophosphate, PENTA), 2-hydrozyethyl methacrylate (HEMA), polyalkenic acid, biphenyl dimethacrylate (BPDM), and glycerol phosphate dimethacrylate ( glycerol phosphate dimethacrylate (GPDM)) may be one or two or more selected from the group consisting of. Especially preferably, 2,2-bis- (4- (2-hydroxy-3-methacryloyloxypropoxy) phenyl) propane (Bis-GMA) and triethylene glycol dimethacrylate (TEGDMA) It may be in the form of a mixture.

The polymerization initiator may be variously performed by a cationic formation mechanism, an anion formation mechanism, a radical formation mechanism, and the like, depending on the type of catalyst used in the polymerization reaction, and the double radical formation mechanism is most commonly used. According to these polymerization mechanisms, the polymerization reaction can be carried out by a photopolymerization reaction, a thermal polymerization reaction or the like.

The photopolymerization reaction is performed by a photopolymerization initiator that is activated by visible light to initiate a polymerization reaction of monomers, and the photopolymerization initiator typically includes an α-diketone-based carbonyl compound photopolymerization initiator such as camphor quinone. And acyl phosphine oxide photopolymerization initiators. Photopolymerization initiators typically use hydrogen donors as cocatalysts and mainly work with tertiary amine based catalysts. Specific examples of the photopolymerization initiators and the promoters are known in the art, and thus description thereof is omitted.

In the thermal polymerization reaction, radicals are formed by heat, including peroxides such as benzoyl peroxide, to initiate polymerization.

Since the polymerization initiator for such a polymerization reaction may be included in the composition within a range that does not affect the physical properties of the product while inducing a polymerization reaction, the "catalyst amount" refers to this content range, the type and content of other components of the composition And may vary depending on the type of catalyst.

Other known compounds may be added to the composition of the present invention within the scope of not impairing the effects of the present invention. Such materials include polymerization inhibitors, antioxidants, colorants, and fluorine additives.

In the present invention, the filler may be, for example, an inorganic filler, an organic filler, a stabilizer, or the like.

Examples of the inorganic filler include amorphous synthetic silica, crystalline natural silica, barium aluminum silicate, kaolin, talc, radioactive impermeable glass powders such as strontium aluminum silicate, and other acid reactive fillers, nano zirconia fillers, and the like. However, the present invention is not limited thereto, and in some cases, it may be used in the form of a mixture of two or more thereof.

In general, since the inorganic filler is hydrophilic, it is incompatible with the hydrophobic MMA monomer, so that the affinity with the monomer may be enhanced by including a binder component or by surface treating the inorganic filler with a silane coupling agent. Specific examples of the silane coupling agent as the hydrophobic surface treatment agent of the inorganic filler are known in the art, and thus a detailed description thereof will be omitted.

The organic filler may be prepared in the form of a powder by synthesizing a monomer or a monomer compatible with the monomer after polymerization in a dental restorative composition by bulk polymerization, emulsion polymerization, suspension polymerization, or the like, and having an average particle diameter of 0.005 to 100. What was granulated in micrometer can be used. In some cases, an inorganic or organic filler may not be added, but instead the mechanical strength may be increased by increasing the curing molecular weight of the monomer.

The stabilizer may preferably be a phenolic and / or phosphate stabilizer.

The content of the monomer and / or oligomer including the unsaturated double bond may vary depending on the field and purpose of use thereof, and is not particularly limited. However, when the content of the monomers and / or oligomers is too small, it is difficult to form a desired polymer and is not easy to mix with inorganic and / or organic fillers. On the contrary, when the content is too high, the workability is insufficient due to the increase in flowability. Not desirable In consideration of this, the content of the monomer and / or oligomer is preferably contained in 10 to 99% by weight, more preferably 10 to 90% by weight based on the total weight of the composition.

The composition and content of the monomer and / or oligomer including the unsaturated double bond play an important role in the dispersion of the composition during polymerization of the dental composite composition, and become an important factor in determining wear resistance and workability.

In one preferred embodiment, the MMA monomer and / or oligomer in the dental composite composition is 2,2-bis- (4- (2-hydroxy-) in consideration of desirable mechanical properties, low abrasion resistance, excellent operability, etc. When using a mixture of 3-methacryloyloxypropoxy) phenyl) propane (Bis-GMA) and triethyleneglycol dimethacrylate (TEGDMA), the Bis-GMA content is based on the total weight of the composition. ~ 20% by weight, the content of TEGDMA may be 5 to 20% by weight, respectively.

Preferably, the inorganic filler and / or the organic filler may be contained in an amount of 40 to 90 wt% based on the total weight of the composition when considering the content relationship with the MMA monomer.

The average particle diameter of the inorganic filler and / or the organic filler is preferably 0.3 to 3 μm. If the average particle size is smaller than 0.3 μm, uniform dispersion in the composition may not be difficult due to cohesion between the particles, and the viscosity It rises and air bubbles and workability fall. On the other hand, if the diameter is larger than 3 μm, the bond strength and physical property decreases rapidly (internal cracking occurs) as the ratio of the height to the radius increases. have.

In one preferred example, the large sized indirect repair block may be a bridge. The problem with conventional products was the size of composite resin blocks that could only process crowns or veneers that could treat only one tooth. This does not take full advantage of the advantages such as workability of composite resin blocks, less damage of antagonists, and high tensile strength. Therefore, a composite resin block sized to process a bridge capable of treating several teeth at the same time can achieve the processability, time and economic effects simultaneously to meet the needs of the buyer.

For the same reason as above, it is preferable that the dental composite resin block has a diameter of 30 mm or more and a height of 1.5 mm or more. The bridge is installed so that the function of the tooth is completely impaired so that the load of the deleted tooth is compensated for by the teeth on both sides. For this purpose, the average molar size is about 10 mm x 10 mm in length * height, so the total bridge length should be at least about 30 mm. In addition, since too large a size may interfere for ease of processing, the diameter of the dental composite resin block may be preferably 30 mm or more and 110 mm or less.

As described above, the dental composite resin block according to the present invention is in the form of a disc having a particle ratio of 5 to less than the diameter of the application of the micromixed particles, the production of a large number of indirect restoration blocks and a number of restorations in one process. Is possible.

1 is a photograph of the presence or absence of internal crack generation of the block having a ratio of height to radius according to Example 1 in Example 1;
FIG. 2 is a photograph showing the presence or absence of internal cracking of blocks having a ratio of height to radius according to Example 1 in Example 1;
3 is a photograph of a disk-shaped composite resin block produced by Example 1 in Experimental Example 2;
Figure 4 is a photograph after processing the disk-shaped composite resin block produced by Example 1 in Experimental Example 2 using CAD / CAM.

Hereinafter, the present invention will be described in further detail with reference to the following examples. However, the following examples are for illustrative purposes only and are not intended to limit the scope of the present invention.

≪ Example 1 >

The composition of the photopolymerized indirect restorative composite resin block was prepared according to the composition of Table 1.

[Table 1]

<Example 2>

In Example 1, except that the D50 size of the barium aluminosilicate was 3 μm, a photopolymerizable indirect repair composite resin block composition was prepared in the same manner as in Example 1.

&Lt; Example 3 >

A photopolymerizable indirect repair composite resin block composition was prepared in the same manner as in Example 1, except that D50 of barium aluminosilicate was 0.7 μm in Example 1.

&Lt; Comparative Example 1 &

In Example 1, except that the D50 size of the barium aluminosilicate was 0.2 μm, a photopolymerizable indirect repair composite resin block composition was prepared in the same manner as in Example 1.

&Lt; Comparative Example 2 &

In Example 1, except that the D50 size of the barium aluminosilicate was 5.0 μm, a photopolymerizable indirect repair composite resin block composition was prepared in the same manner as in Example 1.

<Experimental Example 1>

The compositions prepared in Examples 1 to 3 were respectively filled into molds of diameter 14 mm * height 35 mm (ratio of radius to height: 5) and diameter 14 mm * height 70 mm (ratio of radius to height: 10) and at 2500 rpm. Centrifugation was performed for 1 hour to remove the bubbles contained therein. The composite resin paste was photopolymerized at 50,000 lux for about 5 minutes, and the presence of cracks in the obtained composite resin blocks was shown in Table 2 below.

[Table 2]

As shown in Table 2, in Examples 1 to 3 according to the present invention, cracks did not occur in the composite resin block manufactured with a diameter of 14 mm * height 35 mm (ratio of radius to height: 5), but with a diameter of 14 mm. * Internal cracks occurred in all composite resin blocks with a height of 70 mm (ratio of height to radius: 10).

FIG. 1 is a photograph taken by cutting in units of 10 mm from a block having a ratio of height to radius according to Example 1 in units of 5, and FIG. It is a photograph observed by cutting in mm units.

Referring to these drawings, in the case of FIG. 1, it can be seen that no crack has occurred in both the outside and the inside. In FIG. 1, S1 is the upper surface of the block itself, S2 is a cross section cut off the upper 10 mm, S3 is a cross section cut off the upper 20 mm, and S4 is a cross section cut off the upper 30 mm.

On the other hand, in the case of Figure 2, it can be seen that the crack occurred both outside and inside. In FIG. 2, L1 to L8 are cross-sections observed by cutting in units of 10 mm from an upper surface to a lower surface of the block itself as in FIG. 1.

<Experimental Example 2>

The compositions prepared in Examples 1 to 3 and Comparative Examples 1 and 2 were respectively filled in a mold having a diameter of 101 mm * 20 mm in height (ratio of radius to height: 0.2), and were contained by performing centrifugation at 2500 rpm for 1 hour. Bubbles were removed. The composite paste was photopolymerized at 50,000 lux for about 5 minutes, and the presence of cracks was confirmed for the obtained composite blanks, respectively. Then, the crack-free portion was cut and the flexural strength was measured according to ISO 4049: 2009 standard and the compressive strength according to ISO 9917-1: 2007 standard.

[Table 3]

As shown in Table 3, cracks did not occur in all of Examples 1 to 3 according to the present invention, it can be seen that the polymerization stress was sufficiently dispersed by a value of the ratio of the height to the radius of 0.2. Example 1 was superior in physical properties of flexural strength and compressive strength compared to Examples 2 and 3.

In summation of the above contents, Examples 1 to 3 cause cracks to occur when the ratio of height to height is high. Therefore, no crack occurred in the disc 101 mm composite resin block considering the ratio of the low radius to the height, and high physical properties were shown in Examples 1 to 3. Since the ratio of the height to the radius is 5 or less and the particle size of 0.3 ~ 3 ㎛ disk-shaped composite resin block has a high physical properties without cracking, it can be used for bridge and multi-processing.

Those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims (14)

As a dental composite resin block,
It is possible to manufacture two or more restorations in one-time manufacturing and indirect restoration blocks of a smaller size than the dental composite resin block, and the shape of the disk with a ratio of radius to height of 0.1 to 5,
The dental composite resin block may be a monomer or oligomer comprising an unsaturated double bond, or a monomer and an oligomer; Polymerization initiators for initiating polymerization; And it is made of a resin composition comprising a filler;
The size of the particles used in the resin composition is 0.3 to 3 ㎛,
The polymerization initiator comprises a photopolymerization initiator or a thermal polymerization initiator,
The filler is a composite resin composite block, characterized in that contained in 40 to 90% by weight based on the total weight of the composition. delete delete According to claim 1, wherein the monomer containing an unsaturated double bond is a dental composite resin block, characterized in that the methyl methacrylate (MMA) monomer. The method of claim 4, wherein the MMA monomer is 2,2-bis- (4- (2-hydroxy-3-methacryloyloxypropoxy) phenyl) propane (Bis-GMA), ethylene glycol dimethacryl Rate (TGDMA), Triethyleneglycol Dimethacrylate (TEGDMA), Ethoxylate Bisphenol A Dimethacrylate (Bis-EMA), Urethane Dimethacrylate (UDMA), Dipentaryltritol Pentaacrylate Mono Phosphate (dipentaerythritol pentaacrylate monophosphate (PENTA), 2-hydrozyethyl methacrylate (HEMA), polyalkenic acid, biphenyl dimethacrylate (BPDM), and glycerol Dental composite resin block, characterized in that one or more monomers selected from the group consisting of glycerol phosphate dimethacrylate (GPDM). The method of claim 5, wherein the MMA monomer is 2,2-bis- (4- (2-hydroxy-3-methacryloyloxypropoxy) phenyl) propane (Bis-GMA) and triethylene glycol dimethacrylate Dental composite resin block, characterized in that a mixture of methacrylate (TEGDMA). delete The dental composite resin block of claim 1, wherein the filler comprises an inorganic filler or an organic filler, or an inorganic filler and an organic filler. The method of claim 8, wherein the inorganic filler is one or more selected from the group consisting of amorphous synthetic silica, crystalline natural silica, barium aluminum silicate, kaolin, talc, strontium aluminum silicate, acid reactive filler and nano zirconia filler. Composite resin blocks. The dental composite resin block according to claim 1, wherein the monomer or oligomer including the unsaturated double bond, or the monomer and oligomer is included in an amount of 10 to 99 wt% based on the total weight of the composition. According to claim 6, wherein the content of 2,2-bis- (4- (2-hydroxy-3-methacryloyloxypropoxy) phenyl) propane is 5 to 20% by weight based on the total weight of the composition and The content of triethylene glycol dimethacrylate is a composite composite resin block, characterized in that 5 to 20% by weight, respectively, based on the total weight of the composition. delete The dental composite resin block according to claim 1, wherein the large sized indirect restorative block is a bridge. The dental composite resin block according to claim 1, wherein the dental composite resin block has a diameter of 30 mm to 110 mm.

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