| A | B |
|---|
| Porcelain restorations have | great stain resistance |
| Porcelain bonds to metal by | fusion with oxides on the surface of the metal |
| The main advantage of all ceramic crowns over porcelain bonded to metal crown is | Their superior esthetics |
| the main disadvantage of feldspathic porcelain | tendency to fracture |
| In Office CAD/CAM provides the following advantages | no need for an outside lab, no need for a temp or provisional crown, crown can be completed in one visit |
| The basic color of the tooth is called | Hue |
| Avoid the following when taking a shade of a tooth | lipstick on the patient, bright clothes, dirty teeth |
| Avoid these materials around a ceramic crown | acidulated topical fluoride, course prophy paste, acid etch |
| the impression for a CAD?CAM crown is | done by capturing an image of the prepared tooth with an optical scanner |
| Which of the following statements about porcelain veneers is false | porcelain veneers are usually cemented with zinc phosphate or GIC |
| When assisting a dentist with taking the shade of tooth the dental assistant must | cover brightly colored clothing with a pastel, neutral colored bib |
| Zirconia | is the strongest ceramic and most fracture resistant |
| All of the following are processing methods for ceramic materials | sintering, heat pressing, CAD/CAM |
| when taking photographs of the teeth to send to the dental lab to help convey the correct shade, what is the proper location for the shade tab in the photograph | the same pane as the tooth being match |
