Dental hygienist27. The stain on the gum line 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 commonly found in young people2. What is dental fluorosis, also known as mottling? Teeth with 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 restorations? A technique used to rebuild a tooth using a malleable filling material that quickly hardens in the tooth.5. How many procedures are normally necessary in a direct restoration?One6. What type of restoration is used on large fillings? Indirect restorations7. What are indirect restorations? When restorations are made 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 in indirect restorations? Ceramic or gold10. Requires indirect restorations, how many outpatient visits? Two11. Temporary restorations cover the prepared tooth and keep the surrounding tissue clean.12. What are some types of precision attachments that help attach dentures to teeth? Magnets are used, as well as hooks and clips.13. What is the affordable aesthetic ceramic chair restoration known as CEREC? Restoration that uses a machine and computer with 3D technology to generate dental restorations. This is done in an office visit.14. How many restoration classes are there? You are15. Class I restorations on which part of the teeth? involves the pit and fissure16. What are the three groups......center of paper......hand-held laxis angle instrument?Use a pen with the handle resting on the hand56. Why is the rheostat known as foot control used? To control the speed of the handpiece57. What is the maximum operation for a low speed handpiece? 20,000 rpm58. What are the two types of fulcrum? Extraoral or intraoral60. During a coronal polishing procedure, a right-handed operator begins by sitting in the 8 to 9:61 position. During a coronal polishing procedure, a left-handed operator begins by sitting in the 3 to 4 o'clock position62. What sequence is used in a full-mouth coronal polishing?A predetermined sequence to cover all areas63.During a coronal polishing, what should be polished first?Ceramic and aesthetic restorations64. Oral prophylaxis refers to thorough cleaning with the removal of stones, stains, debris and plaque