Dentistry > EXAM > Mental Dental Operative| 213 questions| all answers 100% correct (All)

Mental Dental Operative| 213 questions| all answers 100% correct

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What does the carbonate do to the hydroxyapatite? Correct Answer: Increases its solubility Why is a cavity deeper into the tooth into more soluble parts of the enamel? Correct Answer: Because the... outside tends to be fluoroapatite and the inside tends to be carbonate-substituted hydroxyapatite Lactic acid is produced by bacteria in the mouth via what process? Correct Answer: Fermentation What is the critical pH of normal tooth enamel? Correct Answer: 5.5 What is the critical pH of fluoride teeth? Correct Answer: 4.5 What 3 things does fluoride do to reduce cavities? Correct Answer: 1. remineralizes teeth 2. decreases enamel solubility 3. interferes with metabolic activity of cariogenic bacteria What is the critical pH for dentin and cememtum? Correct Answer: 6.2-6.7 Caries are modeled by what diagram? Correct Answer: Modified keyes-jordan diagram Pit and fissure lesions are what shape? Correct Answer: Inverted v-shape Smooth surface lesions are what shape? Correct Answer: V shape Compare infected dentin with affected dentin? Correct Answer: Infected = superficial, wet, soft, mushy, necrotic Affected = deeper, dry, leathery, demineralized but not invaded by bacteria How long can it take for an intact surface to go from intact surface to cavitation? Correct Answer: 1-2 years What is the process for progression of a lesion? Correct Answer: Enamel demineralization Dentin demineralization Enamel cavitation Dentin cavitation Incipient caries looks like what? Correct Answer: Opaque white when dried Simple cavity? Correct Answer: covers one surface Compound cavity? Correct Answer: 2 surfaces Complex cavity? Correct Answer: 3+ surfaces Primary lesion? Correct Answer: Original caries lesion - can have multiple original caries on single tooth depending on location Secondary/recurrent lesion? Correct Answer: Occurs at junction of tooth and restoration indicating microleakage Residual lesion? Correct Answer: Caries that remain in a completed tooth prep Compare the color of the following: 1. Acute/rampant caries 2. Chronic/slow caries [Show More]

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