Powers Dental Materials Properties and Manipulation, 10th …国家牙科材料性能与操作，第十….docVIP

Powers: Dental Materials, 10th Edition Chapter 01: Introduction to Restorative Dental Materials Test Bank MULTIPLE CHOICE 1. Caries is caused by: A. food debris. B. materia alba. C. bacterial plaque. D. salivary glycoproteins. E. acidic foodstuff. ANS: C Feedback A Food debris does not have the structural organization of bacterial plaque biofilm. B Materia alba does not have the structural organization of bacterial plaque biofilm. C Caries is caused by bacterial plaque. D Salivary glycoproteins form the acquired enamel pellicle to which bacteria adhere. E Acidic foodstuff lowers pH and may demineralize teeth but does not directly cause decay. REF: Pg. 1 2. Caries is most likely to occur on which of the following tooth surfaces? A. Buccal B. Lingual C. Occlusal D. Interproximal E. C and D ANS: E Feedback A Buccal surfaces are also susceptible to caries; however, there is less surface area left unchecked. B Lingual surfaces are also susceptible to caries; however, there is less surface area left unchecked. C Caries is most likely to occur in pits and fissures on the occlusal surface and on interproximal tooth surfaces where plaque accumulates unchecked. D Caries is most likely to occur in pits and fissures on the occlusal surface and on interproximal tooth surfaces where plaque accumulates unchecked. E Caries is most likely to occur in pits and fissures on the occlusal surface and on interproximal tooth surfaces where plaque accumulates unchecked. REF: Pg. 1 3. Which of the following is an intracoronal restoration? A. Ceramic-alloy crown on tooth number 21 B. Ceramic veneer on tooth number 8 C. Occlusal amalgam on tooth number 14 D. Ceramic onlay on tooth number 30 ANS: C Feedback A The alternate choices are all extracoronal restorations used to repair the external. B The alternate choices are all extracoronal restorations used to repair the external. C An occlusal amalgam on tooth number 14 is an example of an intracoronal rest