DENT 461 midterm exam

<Q>The diet sheet should be given to the patient with the following instructions, choose the incorrect statement:<C+> Filling details of food intake of any three consecutive days in the week<C> The food intake should be indicated with relative quantities <C> The patients should fill the sheet themselves<C> Substitutes to cariogenic foods should be given such as cheese, nuts and dairy products<C> The best substitute to cariogenic drinks are water and milk

<Q> A mother of a 7-month old baby with the (81) erupted enters to your clinic asking about cleaning her baby's teeth, you would give her the following advice except: <C+> Start brushing twice daily when the child gets one year old<C> The mother may start wiping newly erupted incisors with gauze<C> To use fluoridated toothpaste<C> There is no advantage of using an electric toothbrush over a manual one withregards to efficiency

<Q> The most important advantage of chlorhexidine gel (PERIOGARD) thatmakes it useful for patients suffering post-radiation mucositis is: <C> Less staining <C> Slight after-taste from use<C+> Less irritation <C> May be used for children under 5 years

<Q> Which of the following statements is true about the bonding mechanism of fissure sealants: <C> There are two types of possible surface patterns after etching a tooth; preferential removal of prism cores, or preferential removal of prism peripheries<C+> Resin tags are about 40 µm deep<C> Primary enamel has higher retention rates for sealants than permanent enamel<C> Retention of sealants is the direct result of chemical bond with the enamel

<Q> One of the following statements is incorrect with regards to use of fissure sealants (FS): <C+> FS may be placed in primary or permanent teeth, retention is less in primaryteeth<C> FS should be placed on premolars with dens invaginatus or dens evaginatus <C> FS should be placed where there is history of caries in the primary teeth<C> FS should be placed in geminated teeth

<Q>Which of the following is false about preventive resin restoration (PRR):<C> The rationale is to restore the tooth with minimal dentin removal and preventfuture caries<C> Bitewings must be taken when there are tight contact points before PRR<C> Local anesthesia is usually not required in type I PRR<C+> In type I PRR, the tooth may be restored with glass ionomer first, then fissure sealant over it

<Q> One of the following is incorrect about the characteristics of xylitol: <C> A non-cariogenic sugar, more effective in caries reduction than sorbitol and sucrose<C> Findings of a recent study have suggested that the anticariogenic effects in xylitol chewing gum are due to the chewing process itself <C+> In a recent study, there was inhibition of mother/child transmission of Strep. mutans leading to less caries development in mothers<C> Xylitol chewing gum may be included in the preventive plan for a patient

<Q> Recaldent is an anticaries product composed of: <C+> Casein phosphopeptide amorphous calcium phosphate<C> Calcium phosphopeptide amorphous calcium phosphate<C> Calcium phosphopeptide amorphous casein phosphate<C> Casein phosphopeptide amorphous calcium phophoprotein

<Q> Which of the following is true: <C> Prophylaxis is necessary before acid etching for placement of fissure sealants<C+> Carious lesions may become inactive under fissure sealant material in most cases due to nutrient deprivation and acid treatment of microorganisms <C> When fissure sealant material is fully cured bis-phenol A may appear <C> Estrogenicity of fissure sealants isn’t an issue because bis-phenol A is detected in the saliva and doesn’t reach the systemic circulation