Primary Preventive Dentistry 6th Ed. (2004)

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Содержание Self-evaluation Questions

Answers and Explanations 1. A, B, and Ccorrect. Dincorrect. The interproximal starting point is apical to the contact point; for the pit-and-fissure lesion, it usually begins bilaterally at the orifice of the fissure. Eincorrect. The dark and the surface zones are the centers for remineralization; the body of the lesion and the translucent zones are centers for demineralization. 2. A, D, and Ecorrect. Bincorrect. The MS usually precede the lactobacilli. Cincorrect. The bacteria-producing soluble glucans often are noncariogenic because of adherence problems; the insoluble glucans are usually produced by the cariogenic bacteria and facilitate adherence. 3. B, D, and Ecorrect. Aincorrect. The critical pH for enamel demineralization is from 5.5 to 5.0. Cincorrect. The same zones are present but are less clearly defined because of the presence of bacteria, plaque, and debris. 4. A, B, C and Dcorrect. Eincorrect. No studies to date indicate that "deep remineralization" by use of fluoride therapy is or is not an appropriate method of caries control. There is a theoretical basis, much research, and a plethora of hope and enthusiasm for this approach to nonrestorative "repair" of teeth. (What sugar hath rendered asunder, humankind is now laboring to correct!) ^ Self-evaluation Questions 1. In 1890, Miller proposed the ________________________ theory for caries, which is still (with many modifications) a basis for our present concept of the dental caries. 2. The beginning and end-points of a carious lesion are the _____________ (initial) lesion, which can be arrested or reversed by remineralization therapy, and the _____________ (end point) lesion, which must be restored. 3. The four zones of an incipient lesion seen with the polarizing microscope (starting from the tooth surface) are the _____________, _____________, _____________, and the _____________ zones. 4. The zone of the incipient lesion that is the best indicator of remineralization is the _____________ zone; the two zones of demineralization are the _____________ and the _____________ zones. 5. As the pH drops in the environment of the HAP, the sa _____________n of calcium and phosphate in the environment must increase in order to protect the crystals. The presence of _____________ (element) will also help to protect the crystal at a lower pH. 6. The critical pH for enamel demineralization is within the generally accepted range of pH _____ to _____. 7. The diagramming of the drop and recovery of pH on a graph is often referred to as the __________ curve for the investigator who first published on the phenomenon. 8. Two possible sources of the calcium and phosphate accounting for the hypermineralized surface of root caries are _____________ and _____________. 9. The four major types (location) of caries are: _____________, _____________, _____________, and _____________. 10. Two causes for rampant caries are _____________ (dietary "food") and _____________ (dry mouth). 11. The pore space in both the translucent and surface zones is 1 percent; dark zone approximately ____ percent, and the body of the lesion ranges up to ____ percent. References 1. Kim, J. W., Jang, K. T., Lee, S. H., et al. (2001). In vivo rehardening of enamel eroded by cola drink. J Dent Child, 68:122-24. 2. Aftin, T., Buchalla, W., Gollner, M., & Hellwig, E. (2000). Use of variable remineralization periods to improve the abrasion resistance of previously eroded enamel. Caries Res, 34:48-52. 3. Ring, M. E., Ed. (1985). Dentistry: An illustrated history. New York: Harry N. Abrams, Inc. 4. A practical treatise on the diseases of the teeth, in which the origine and nature of decay are explained: and a means of prevention pointed out. Ed. William Robertson. Longman, Rees, Brown, Green and Longman. Paternosterrow, and J. Belcha and Son, Birmingham. 1835. 5. Miller, W. D. (1973). 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A review of their clinical use, cariostatic mechanisms, efficacy and safety. JADA, 131:589-96. 103. Seppa, L. (1991). Studies of fluoride varnishes in Finland. Proc Finn Dent Soc, 87:541-47. 104. Autio-Gold, J. T., & Courts, F. (2000). Assessing the effect of fluoride varnish on early enamel carious lesions in the primary dentition. JADA, 132:1247-53. 0.125 Copyright © 2004 by Pearson Education, Inc., Pearson Prentice Hall. All rights reserved. (+/-) Show / Hide Bibliography Working...  × Chapter 5. Toothbrushes and Toothbrushing Methods - Samuel L. Yankell Ulrich P. Saxer

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