口腔学英文课件：Bonding Adhesion
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• It is a kind of material that can bond one or more solid substance, called the bonding agents (adhesives). The solid material is called adher-end. The material that bonding dental prosthesis or dental restorative materials to the surfaceof dental hard tissue called binder.
• (2) theory of intermolecular force
• Theory holds that as long as two broad surfaces in close contact ,adsorption force alone can produce high adhesion strength. In addition, the intermolecular forces also Including the hydrogen bond and acid-base interactions. Hydrogen exists in the dentin collagen and the effect of the adhesive. Zirconia Alumina ceramic porcelain and ceramic adhesive mainly depends on the surface of the metal oxide (base) and an acidic adhesive monomers chemisorption (acid Base reaction)
• Adhesives and other auxiliary materials, such as etching agent, totally referred as dental bonding material
Байду номын сангаас
• 1 The mechanism of adhesion formation
• Adhesive combined one side with dental tissue, the other side with the filling material.
Bonding/adhesion
• Today, binding material or dental bonding technique are more and more used in dental defect and tooth missing repair process .It can reduce the cutting of tissue of tooth ,utmost to preserve the healthy tooth tissue ,Improve the bonding strength between hard tissue of teeth and the restoration, improve the adaptation of the bonding interface, and long fatigue measurement of fixed prostheses.
• Bonding (adhesion) refers to a phenomenon that two same or different types of solid substance can produce stable combination by another substance between the two tables
• There are several theories about the mechanism of adhesion formation.
• (1)Theory of chemisorption
• The theory holds that the reason why it can form a kind of powerful force between some of the adhesive and the adherend is that there has chemical bond between the adhesive and the adherend. Adhesive bonds are involved in covalent bond and Ionic bond. Covalent bond can be relatively high, is hard to be damaged, the ionic bond of insoluble or poorly soluble substances are very stable. Undoubtedly If the adhesive with the sticky substance can be formed a wide range of chemical bond has many benefits. However, the formation of a chemical bond to be broad must meet certain quantum chemical conditions, not be sticky adhesive with each contact point can form a chemical bond. However, increasing the chemical bonding, the adhesive can be more effective, more durable, more resistant to the stress concentration towel and environmental erosion.
• (2) theory of intermolecular force
• Theory holds that as long as two broad surfaces in close contact ,adsorption force alone can produce high adhesion strength. In addition, the intermolecular forces also Including the hydrogen bond and acid-base interactions. Hydrogen exists in the dentin collagen and the effect of the adhesive. Zirconia Alumina ceramic porcelain and ceramic adhesive mainly depends on the surface of the metal oxide (base) and an acidic adhesive monomers chemisorption (acid Base reaction)
• Adhesives and other auxiliary materials, such as etching agent, totally referred as dental bonding material
Байду номын сангаас
• 1 The mechanism of adhesion formation
• Adhesive combined one side with dental tissue, the other side with the filling material.
Bonding/adhesion
• Today, binding material or dental bonding technique are more and more used in dental defect and tooth missing repair process .It can reduce the cutting of tissue of tooth ,utmost to preserve the healthy tooth tissue ,Improve the bonding strength between hard tissue of teeth and the restoration, improve the adaptation of the bonding interface, and long fatigue measurement of fixed prostheses.
• Bonding (adhesion) refers to a phenomenon that two same or different types of solid substance can produce stable combination by another substance between the two tables
• There are several theories about the mechanism of adhesion formation.
• (1)Theory of chemisorption
• The theory holds that the reason why it can form a kind of powerful force between some of the adhesive and the adherend is that there has chemical bond between the adhesive and the adherend. Adhesive bonds are involved in covalent bond and Ionic bond. Covalent bond can be relatively high, is hard to be damaged, the ionic bond of insoluble or poorly soluble substances are very stable. Undoubtedly If the adhesive with the sticky substance can be formed a wide range of chemical bond has many benefits. However, the formation of a chemical bond to be broad must meet certain quantum chemical conditions, not be sticky adhesive with each contact point can form a chemical bond. However, increasing the chemical bonding, the adhesive can be more effective, more durable, more resistant to the stress concentration towel and environmental erosion.