Dental Higenetist27. The stain on the gingival margin of the tooth is caused by chromogenic bacteria1. At what age is dental fluorosis likely to occur? It can occur at any age. Overexposure to fluoride is common in younger people2. What is dental fluorosis, also known as mottling? Teeth showing permanent discoloration with white or brown streaks caused by overexposure to fluoride.3. What are the two types of dental restorations? Direct and indirect restorations4. What are direct restores? A technique used to build a tooth using a malleable filling material that will harden quickly within the tooth.5. How many procedures are normally required in a direct restoration?A6. What type of restoration is used on large fillings? Indirect restorations7. What are indirect restorations? When restorations are fabricated outside the mouth using dental impressions of the tooth.8. Indirect restorations are known as crowns, veneers, bridges, onlays and inlays.9. What type of material is used for indirect restorations? Ceramic or gold10. Indirect restorations required, how many office visits? Two11. Temporary restorations cover the prepared tooth and keep the surrounding tissues clean.12. What are the types of precision accessories that make it easier to attach dentures to teeth? Magnets are used, as well as hooks and clips.13. What is the economical aesthetic ceramic chair restoration known as CEREC? Restoration using a machine and computer with 3D technology to generate a dental restoration. This is done in a single office visit.14. How many dining classes are there?Six15. Class I restorations concern which part of the teeth? involves the pit and fissure16. What are the three groups...... middle of paper ...... hand held laxis angle tool? Using a pen, grasp the handle on the hand56. Why is the rheostat known as foot pedal control used? To control the speed of the handpiece57. What is the maximum operating time of a low speed handpiece? 20,000 rpm58. What are the two types of support point? Extra-oral or intra-oral60. During a coronal polishing procedure, a right-handed operator begins by sitting at an 8 to 9 o'clock position.61. During a coronal polishing procedure, a left-handed operator begins by sitting at a position between 3 and 4 o'clock62. What sequence is used during a full mouth coronal polish? A predetermined sequence to cover all areas63. When performing coronal polishing, what should be polished first? Porcelain and aesthetic restorations64. Oral prophylaxis refers to a complete cleaning with removal of tartar, stains, debris and plaque.