© 1998 – 2024 National Dental Assisting Examining Board 43 Candidate Handbook for the Written Examination – 2023 A dental assistant is responsible for performing rubber cup polishing. Patients present with many types of stains. From the list of stains below, select the one that best matches the description given. Each type of stain may be used once, more than once or not at all. 1. Orange. 2. Yellow. 3. Tobacco. 4. Chlorhexidine. 38. Black tenacious deposits are present in pits and fissures, on enamel and on restorations. 39. A non-smoker presents with yellow-brown stains on interproximal and cervical areas of the teeth, as well as on restorations, dorsal surface of the tongue and within retained biofilm. 40. A 12-year-old patient presents with stains on the buccal surfaces of maxillary permanent molars and lingual surfaces of lower anterior teeth. The recorded biofilm index is 2. Domain reference: 7.3.2 Answer Key to Sample Questions: Item 1: 1 Item 21: 1 Item 2: 2 Item 22: 3 Item 3: 2 Item 23: 2 Item 4: 3 Item 24: 3 Item 5: 2 Item 25: 3 Item 6: 3 Item 26: 1 Item 7: 3 Item 27: 2 Item 8: 4 Item 28: 2 Item 9: 1 Item 29: 2 Item 10: 2 Item 30: 2 Item 11: 1 Item 31: 3 Item 12: 2 Item 32: 4 Item 13: 3 Item 33: 2 Item 14: 2 Item 34: 4 Item 15: 2 Item 35: 1 Item 16: 4 Item 36: 3 Item 17: 1 Item 37: 3 Item 18: 2 Item 38: 3 Item 19: 1 Item 39: 4 Item 20: 3 Item 40: 2
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