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DA 140
Chapter 33 Cements - temp & permanent
| Term | Definition |
|---|---|
| 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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