Nano-composite resin dental material for numerical control machine-shaping and preparation thereof

Abstract

The invention discloses nano composite resin dental material used for numerical control forming and the preparation method, which comprises the following composition according to weight account: resin matrix A 25 to 36; resin matrix B 15 to 30; inorganic filler A 30 to 35; inorganic filler B 8 to 15; organic filler 0 to 2; initiator 0.8 to 1.4; reducing agent 0.8 to 1.4; inhibitor 0.01 to 0.05; coloring agent 0.001 to 0.007. The preparation method comprises the following: the resin matrix preparing; the initiation system mixture preparing; inorganic filler mixture preparing; mixed avoiding light, ultrasonic scattering, polymerization solidifying and shaping upon the mixture from the above steps with the organic filler, the inhibitor and the coloring agent. The nano composite resin dental material has the advantages of high density, good wear resistant performance and high hardness and more excellent performance than polymethyl methacrylate artificial tooth and simple preparation method. The preparation method is suitable for dentistry clinical application and popularization.

Description

technical field

[0001] The invention relates to nanobiological materials, in particular to nanocomposite resin dental materials, in particular to a new nanocomposite resin dental material for numerical control processing and a preparation method thereof. Background technique

[0002] At present, the main material of artificial teeth widely used in clinical practice is methyl methacrylate, but the Vickers hardness of commonly used polymethyl methacrylate artificial teeth is 15-20MPa, and the coefficient of linear expansion is 80-90× 10 -6 ·K -1 , elastic modulus of 2 ~ 2.4GPa, density of 1.1 ~ 1.2g / cm 3 . The material has problems such as low hardness, large shrinkage, poor wear resistance, low strength, and insufficient density. Moreover, the influence of the wear resistance of artificial teeth is more manifested in the restoration of total dentures. The dentures are severely worn, food cannot be bitten, and the vertical height is reduced. These factors are also one of t...