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EFDA T#1
| Question | Answer |
|---|---|
| Which type of dental cement is used as an adhesive for permanent indirect restorations? | luting |
| When are temporary cements used? | placing a provisional crown |
| What would occur if there were a delay between mixing a luting material and placing the indirect restoration? | initial set begins |
| How should the dental cements be dispensed for mixing? | dispense the powder first then the liquid |
| Which cement that gives off an exothermic reaction and must be spatulated over a wide area on a cool, dry, thick glass slab? | Zinc phosphate |
| How should cement be placed into an indirect restoration for delivery? | Add a thin lining to cover all internal walls of the casting |
| When composite resin cement is used, how should the tooth surface be prepared? | Free of all plaque and debris; Etched or treated with a bonding system |
| Which factor influence the cementation procedure? | humidity, temperature, mixing time |
| What step should be followed before dispensing the cement powder? | fluff and measure the powder |
| Which cement inhibits recurrent decay? | glass ionomer |
| Which type of glass ionomer cement is used for pit and fissure sealants? | IV |
| How should glass ionomer cement be mixed to increase working time? | on a glass slab |
| Which type of cements can light-cured? | composite resin and glass ionomer |
| Properly mixed glass ionomer cement should have a ______ appearance. | glossy |
| How should polycarboxylate cement appear once setting has initiated? | stringy or weblike |
| Which technique will help to dissipate heat when mixing zinc phosphate cement? | mixing on a cool glass slab |
| Which cement is the most acidic and irritating to the pulp? | zinc phosphate |
| Which of the following is an example of a fixed prosthesis? | porcelain veneer |
| Which cast restoration is designed to fit snugly within a tooth preparation, such as a Class II restoration, and covers only a portion of the occlusal and proximal surface? | inlay |
| Which type of crown does not cover the entire anatomic portion of the tooth? | three-quarter |
| When one or more teeth are missing from the same arch, which permanent restoration is recommended? | fixed bridge |
| A gingival retraction cord is placed ______ the crown preparation is completed; it is removed ______ the final impression is taken | after; before |
| How is a Maryland Bridge held in place? | Winglike extensions are bonded onto the lingual surfaces of the adjacent teeth |
| Which device is used to determine the tooth color for ceramic crowns or bridges? | shade guide |
| What is the most common method to obtain gingival retraction? | chemical reaction |
| Which type of retraction cord is contraindicated for patients with a history of cardiovascular disease | cord impregnated with epinephrine |
| Which statement is correct when packing a retraction cord | All of the above |
| What is the purpose of provisional coverage? | to maintain or restore tooth function, or both; to provide comfort for the patient while the permanent restoration is being fabricated; to protect the margins of the prepared tooth |
| Which matrix system used for Class II posterior restorations is the most common? | tofflemire retainer and universal band |
| The universal, or Tofflemire, retainer holds the matrix band snugly in position. It is most often positioned in which area? | On the buccal surface of the tooth being restored |
| Which matrix system is used for anterior composite resin or glass ionomer restorations? | clear plastic matrix |
| To contour a metal matrix band for posterior teeth, place the band on a paper pad and rub the inner surface of the band with ____ until the ends begin to curl. | burnisher or the end of a mirror handle |
| Which of the following is the instrument of choice when positioning a wooden wedge? | howe pliers |
| Where is the wedge positioned when placing a posterior restoration? | lingual |
| Once the AutoMatrix band is positioned on the tooth, how is the band tightened? | A wrench turns the coil clockwise to tighten the band |
| What is the component of a universal matrix retainer that serves to hold the matrix band securely in the retainer? | outer knob |
| The _____ is used to decrease the size of the matrix band loop after the band has been placed on the tooth. | inner knob |
| The larger side of the universal matrix band loop is always directed toward which part of the tooth? | occlusal one third |
| Calcium hydroxide | stimulates the production of reparative dentin |
| Dental varnish is used on the cavity preparation to | seal dentinal tubules and reduce leakage around a restoration |
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sofiaacorto