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Chapter 45 lab

study guide

QuestionAnswer
Mixing Glass Ionomer for Permanent Cementation Equipment and Supplies ✓ Paper mixing pad ✓ Spatula (flexible stainless steel) ✓ Glass ionomer powder and dispenser ✓ Glass ionomer liquid and dropper ✓ 2 × 2–inch gauze pads
Dispense the manufacturer’s recommended proportion of the liquid on one half of the paper pad. G.I
Dispense the manufacturer’s recommended proportion of the powder on the other half of the pad; this is usually divided into two or three increments. G.I
Incorporate the powder into the liquid, following the recommended (mixing time) The material should have a glossy appearance. G.I
Mixing Composite Resin for Permanent Cementation Equipment and Supplies Etching system ✓ Cotton pellets ✓ Applicators ✓ Bonding system ✓ Resin cement (supplied in powder/liquid or syringe type) ✓ Mixing pad ✓ Spatula ✓ 2 × 2–inch gauze pads
Apply etchant to enamel and dentin for 15 seconds;
Mixing Composite Resin Blot excess water with a moist cotton pellet, leaving the tooth moist.     PURPOSE During this procedure, you do not want the tooth completely dry.
Mixing Composite Resin Light-cure each surface for 10 seconds.
Mixing Composite Resin Apply primer to etched porcelain or roughened metal surfaces. Dry for 5 seconds.
Mixing Composite Resin Dispense a 1:1 ratio onto a mixing pad; then mix for 10 seconds. Apply a thin layer of cement to the bonding surface of the restoration.
Mixing Composite Resin Once the crown is seated, margins may be light-cured for 40 seconds or allowed to self-cure for 10 minutes from the start of the mixing.
Mixing Zinc Oxide–Eugenol for Temporary Cementation Equipment and Supplies ✓ Treated paper pad ✓ Spatula (flexible stainless steel) ✓ ZOE catalyst paste ✓ ZOE accelerator paste ✓ 2 × 2–inch gauze pads
Mixing Zinc Oxide–Eugenol for Temporary Measure the pastes onto the mixing pad at equal lengths, approximately ½ inch per unit of restoration.
The material should be smooth and creamy and prepared within 20 to 30 seconds. Mixing Zinc Oxide–Eugenol
Mixing Zinc Oxide–Eugenol for Permanent Cementation Equipment and Supplies ✓ Treated paper pad or glass slab ✓ Spatula (flexible stainless steel) ✓ Zinc oxide powder and dispenser ✓ Eugenol liquid and dropper ✓ 2 × 2–inch gauze pads
Incorporate the powder into the liquid all at once; spatulate for 30 seconds. Mixing Zinc Oxide–Eugenol
Mixing Polycarboxylate for Permanent Cementation Equipment and Supplies ✓ Treated paper pad or glass slab ✓ Spatula (flexible stainless steel) ✓ Polycarboxylate powder and dispenser ✓ Polycarboxylate liquid (in plastic squeeze bottle or calibrated syringe) ✓ 2 × 2–inch gauze pads
The mix must be completed within 30 seconds. Mixing Polycarboxylate for Permanent Cementation
A correct mix should be somewhat thick and should have a shiny, glossy surface. Mixing Polycarboxylate for Permanent Cementation
 If the material has lost its glossiness or exhibits a stringy “weblike” consistency, it has begun the setting process and should not be used Mixing Polycarboxylate
Mixing Zinc Phosphate for Permanent Cementation Equipment and Supplies ✓ Glass slab (cool) ✓ Spatula (flexible stainless steel) ✓ Zinc phosphate powder and dispenser ✓ Zinc phosphate liquid and dropper ✓ 2 × 2–inch gauze pads
Divide the powder into small increments as directed by the manufacturer. Zinc Phosphate for Permanent Cementation
 These materials can be affected by prolonged exposure to the humidity. Mixing Zinc Phosphate for Permanent Cementation
Divide the powder into small increments as directed by the manufacturer. Zinc Phosphate for Permanent Cementation
The cement should string up and break about 1 inch from the slab. Total mixing time is approximately 1 to 2 minutes. Zinc Phosphate for Permanent Cementation
Created by: alejac0360
 

 



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