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DA 140

Chapter 33 Cements - temp & permanent

Esthetic How the restorative material looks
Shade selection Several tooth shades/colors to match natural tooth when doing composite or other tooth colored treatment
Mechanical retention Material placed directly into the cavity prep; including preparing the walls with cement
Crown former Assists in forming the crown/occlusal surface of the tooth; thin plastic forms shapes like the crown. Used of class 4 w/composite
Pupal floor (or wall) The wall that overviews the pulp
Retention pins Pins placed in tooth prep for added support prior to filling
Line angle Where 2 surfaces meet; line angles are named according to the 2 surfaces. (ex. distopupal line angle)
Trituration vs Amalgamation Trituration - mixing of the alloy & mercury; done with a triturator or amalgamator Amalgamation - actual chemical reaction between alloy & mercury to form the silver amlagam
Recurrent decay Decay that was treated and has come back; returning decay
Luting Bonding/cementing together; the consistency. Permanent luting cement-long lasting, Intermediate-6 to 12mo, Temporary-5 to 7yrs
Thermal change Temp change in mouth causing expansion & contraction; transmitting heat
Viscosity How the material flows; more viscous-thicker like syrup & less viscous-thinner like water
Smear layer Layer of debris & fluids on tooth surface when denting is cut with a bur during cavity prep; this layer is formed
Exothermic Zinc Phosphate & phosphoric acid are mixed together it creates a reaction & heat is released
Polymerization To set or harden; Polymer & monomer = polymerization
Microleakage Saliva & debris seep between the tooth structure & restorative material
Galvanism When 2 different metals are present in the mouth; there is a potential for creation of small electrical shock
Solubility How the material dissolves in a fluid; determines how successful the dental material will be in oral cavity
Base Putty or thick layer between tooth/restoration to protect the pulp form chemical irritation, temp changes and or electrical shock. SEDATIVE(Eugenol) - INSULATING - PROTECTIVE
3 different types of Bases (SIP) SEDATIVE-calms pulp, soothing & has Eugenol & included ZOE & IRM. INSULATING-protects pulp from thermal changes, includes ZOP & PCA. PROTECTIVE-protects pulp, includes GI & calcium hydroxide (Dycal)
ZOE (Zinc Oxide Eugenol) Temporary cement, sedative, creamy smooth luting and base consistency, last 3-5 weeks
IRM (Intermediate Restorative Material) Temporary cement, sedative, creamy smooth luting and as a base reliable for temp filling. Last 6-12mo
ZOP (Zinc Oxide Phosphate) Permanent cement, insulator, luting for crowns/bridges and base for fractures near pulp, amalgam or composite. Is exothermic, mix on cool glass slab, can cause pulp irritant
PCA (Polycarboxylate) Permanent cement, insulator, poly means elastic and will give when pressure is applied. Fluoride releasing, luting and base; used under present restorations
GI (Glass Ionomer) Most widely used, bonds to enamel, denting and metal materials, fluoride releasing. TYPE 1- Ortho bonding & pits/fissures. TYPE III-liner & denting bonding. TYPE IV-Miracle Mix & core build ups
3 Biting forces Tensile - pulse & stretches "tug-of-war" Compressive - pushes or compresses (chewing & biting) Shearing - slides one part of a material over another
Created by: cadengel
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