口腔修复学精品课件（中山大学）8.试戴-粘接.pptVIP

Try-in and Adhesion 姚科 修复体试戴 Try-in: The process of the adaptation of any dental restoration to its site in the mouth 修复体试戴 its site ？（what is the sign?） good margin seal stable enough 修复体试戴 A satisfied try-in including： Good retention Proper occlusion Shape of outer surface Similar colour Proximal contact 修复体粘结 Some interesting words： Cementation Bonding Adhesion Luting 修复体粘结 Adhesion joints including: Chemisorption theory Intermolecular force theory Micro-mechanical interlocking theory Diffusion theory Chemisorption theory 金属键（metallic bond）： a chemical bond in which electrons are shared over many nuclei and electronic conduction occurs. 离子键（ionic bond）： a chemical bond in which one atom loses an electron to form a positive ion and the other atom gains to electron to form a negative ion. 共价键（covalent bond）： a chemical bond that involves sharing a pair of electrons between atoms in a molecule. Intermolecular force theory Including: Van der Waals force Hydrogen bond force Van der Waals force the sum of the attractive or repulsive forces between?molecules?other than those due to?covalent bonds, the?hydrogen bonds, or the?electrostatic interation?of?ions?with one another or with neutral molecules or charged molecule 取向力 Keesom force：极性分子与极性分子之间 诱导力 Debye force：极性分子和非极性分子之间 色散力 London dispersion force：非极性分子和非极性分子之间 hydrogen bond a chemical bond consisting of a hydrogen atom between two electronegative atoms (e.g., oxygen or nitrogen) with one side be a covalent bond and the other being an ionic bond. The bond energy is weaker than chemical bond but stronger than electrostatic force 修复体粘结 Adhesion joints including: Chemisorption theory Intermolecular force theory Micro-mechanical interlocking theory Diffusion theory Requirement of ideal bonding agents Good bonding force Insoluble in saliva Biocompatibility Physical property Chemical stability Processability Type of bonding agent Cement： Zinc phosphate cement 磷酸锌水门汀 Zinc oxide-eugenol