Dental selective laser sintering 3D printing wax powder and preparation method thereof

Abstract

The invention belongs to the technical field of special waxes and 3D printing materials, and discloses a dental selective laser sintering 3D printing wax powder and a preparation method thereof. The wax powder provided by the invention consists of basic wax powder and additives, wherein the basic wax powder comprises the following components in percentage by mass: 50-70% of petroleum wax, 0-15% ofanimal wax, 10-20% of mineral wax or mineral derived wax, 20-30% of plant wax, 0-5% of a flexibilizer, 0-10% of PE wax, 0-1% of color paste and 0-1% of a surfactant; or 40-60% of petroleum wax, 15-30% of animal wax, 0-10% of mineral wax or mineral derived wax, 0-20% of plant wax, 5-10% of a flexibilizer, 10-20% of PE wax, 0-1% of color paste and 0-1% of a surfactant. The dental selective laser sintering 3D printing wax powder provided by the invention has the advantages of good sinterability, good formability, moderate hardness, low kinematic viscosity, strong plasticity and obvious improvement in physical properties.

Description

technical field [0001] The invention belongs to the technical field of special waxes and 3D printing materials, in particular to a dental selective laser sintering 3D printing wax powder and a preparation method thereof. Background technique [0002] Since the 1980s, rapid prototyping (RP) and reverse engineering (RE) as the core of rapid prototyping and manufacturing technology is the product design and manufacturing virtual 3-dimensional, fast, this technology provides the development of prosthodontics However, due to the insufficient accuracy of data collection and rapid prototyping, it is mostly used in the repair of maxillofacial defects in the field of oral restoration. 3D is a kind of fast printing technology, but its unique technology is superior to other fast printing methods, and has been promoted and innovated by various industries. 3D printing technology is one of the core technologies for the transformation and upgrading of the manufacturing industry. The appl...

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Problems solved by technology

[0002] Since the 1980s, rapid prototyping (RP) and reverse engineering (RE) as the core of rapid prototyping and manufacturing technology is the product design and manufacturing virtual 3-dimensional, fast, this technology provides the development of prosthodontics A new way, but because of the insufficient accuracy of data collection and rapid prototyping, it is mostly used in the repair of maxillofacial defects in the field of oral restoration

Patent CN104693579A discloses a method for preparing a composite modified wax powder for laser sintering 3D printing by adding stearic acid, white carbon black, carbon black, and chopped carbon fiber to the wax powder base material ratio of double particle size gradation, Patent CN1326828A discloses a low melting point powder prepared from polyethylene for laser sintering rapid prototyping of fine casting wax models, which is used in the field of precision casting, but this type of wax powder is not suitable for use in the field of dental casting wax

[0006] Traditional dental wax has high heat sensitivity, poor molding precision, and very difficult powder preparation. It cannot be made into wax powder with a particle size that meets the sintering requirements, and is not suitable for laser sintering molding.

[0007] Laser sintering molding has unique advantages and good prospects in the field of dental medicine, but currently there are very few laser sintering molding wax powders on the market that meet the needs of the dental field and applications, so that the superiority of SLS cannot be fully displayed in this field

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