Pre-clinic 26, 27, 32 Assessment
Questions with Correct Verified
Answers.
Toothpaste come in gel, liquid gel, gel/paste, paste, powder, and tablet forms. Some powder
toothpastes are more abrasive than those in prophylaxis paste.
A. Both statements are false
B. Both statements are true - Answer B. Both statements are true
Dental companies now offer various formulas of toothpastes corresponding to hundreds of
products available on the market, adapting to the taste of the patients. Also, toothpastes in the
form of powder (or plant extracts) can alter dental structures and increase their abrasion.
Several of them contain hard, insoluble, irregularly shaped substances or crystals which
constitute risk factors for dental structures. For example, the rate of abrasion of Sunstar's fine
prophylactic paste, bubble gum flavored, is 6.89% while the powder herbal toothpaste reaches
9.15% which is very damaging to all dental structures.
p 399
Sodium bicarbonate, wet or dry, is as abrasive to remove stains. Hydrogen peroxide included in
whitening toothpaste is always effective for eliminating stains.
A. Both statements are false
B. Both statements are true - Answer A. both statements are false
The abrasiveness of bicarbonate is slightly higher than if it is wet. A mild abrasive will therefore
be less effective in eliminating stains. The peroxide, at a minimum concentration of 1% is
necessary to obtain a whitening action, but this percentage is not always indicated on
toothpastes. Its effectiveness then becomes uncertain
p 398
In an adult without recession, which of the following statements is accurate regarding the
interaction between pH and abrasiveness of toothpaste?
,B. Neutral pH and low abrasiveness are protective factors for tooth surface.
C. Neutral pH and mild abrasiveness increase protective factors for biofilm removal.
D. High or basic pH and high abrasiveness increase protective factors to prevent stains. - Answer
D. High or basic pH and high abrasiveness increase protective factors to prevent stains.
Stains on teeth have many origins and toothpaste cannot do miracles by pretending to treat
them 100% The chemical action of high pH (basic or alkaline) cannot theoretically reduce some
extrinsic stains. On the contrary, it is an acidic pH that is needed to remove extrinsic stains. The
mechanical action of high abrasiveness may temporarily promote bleaching action.
p 399
sodium lauryl sulfate may cause
A. a metallic taste in the mouth.
B. a prickling sensation on the tongue.
C. aphthous ulcers.
D. a burning sensation - Answer C. aphthous ulcers
The SLS may irritate the epithelium and cause canker sores, aphthous ulcerations, or recurrent
mouth ulcers in some patients. That is why cocamidopropyl betaine is now more commonly
used as a detergent.
p 395
The following two products are incompatible: sodium lauryl sulfate and Chlorhexidine. The
following two products are incompatible: fluoride and chlorhexidine.
,SLS reduces the anti plaque effect of CHG. Therefore a patient using a dentifrice containing SLS
or fluoride should wait at least 30 minutes before using chlorhexidine- based mouthwash.
p 395
Patients are generally adept at selecting the right toothpaste for their specific dental needs.
Dental hygienist prioritize a medicinal agent specific to the needs of the patient instead of the
Patient being influenced by advertising.
A. Both statements are true
B. Both statements are false
C. First statement is true, second is false
D. First statement is false, second is true - Answer D. First statement is false, second is true
Patients usually choose toothpaste according to the price, unless a dental professional
recommends a specific medicinal agent to effectively solve a problem. DH regularly consult the
scientific evidence to update their knowledge about toothpastes.
p 402
Assessing the patient's health is essential before recommending toothpaste, because the risk of
adverse reactions is not negligible. A child may suffer an anaphylactic shock due to some
allergenic ingredients included in the toothpaste, not indicated on the package.
A. Both statements are true
B. Both statements are false - Answer A. Both statements are true
Regardless of the age of the patient, toothpastes become protective factors and also risk factors
for patient's health. For example, some toothpastes contain derivatives of eggs (white or yolk),
milk (casein), bees (propolis), seafood (fish, crustacean, molluscs), aspirin (ASA), and coloring
agents (the main allergen of toothpastes). It is better to prevent than to find out too late any
complications that would be related to the imprudent recommendations of the DH.
p 398
, B. Cosmetic
C. Therapeutic
D. Hygienic - Answer A. scientific
Dentifrices can yield three types of effects. Cosmetic effect: prevents or removes stains, inhibits
supra gingival calculus formation, whitens teeth, freshens breath, controls oral malodor.
Hygiene effect: removes food particles and oral biofilm. Therapeutic effect: Prevents or reverses
dental caries; reduces gingivitis, oral biofilm, or dentinal hypersensitivity provided by medicinal
or active ingredients. The scientific aspect is pervasive in the hygienist's approach, but it is not a
desired effect at the base in the patient.
p 389
For a patient suffering from gastroesophageal reflux disease, which of the following
recommendations is correct?
A. wait 30 to 60 minutes before brushing teeth.
B. rinse mouth with salt and water
C. rinse mouth with water and baking soda solution.
D. rinse mouth with magnesium hydroxide solution (Maalox). - Answer B. rinse mouth with
salt and water
Basic products serve to neutralize acid pH. Those products can be diluted with a lot of water or
saliva that have a neutral pH. Salted water brings a clean- like feeling, eliminating uncomfortable
pieces of food, but the pH of GERD is too acid for for salted water to be am adequate solution ,
especially if the GERD are often
p 400
The threshold of demineralization of enamel with fluorapatite is at pH 5.5 or less. The threshold
of demineralization of cementum and dentin is at pH 6.5 or less.
Questions with Correct Verified
Answers.
Toothpaste come in gel, liquid gel, gel/paste, paste, powder, and tablet forms. Some powder
toothpastes are more abrasive than those in prophylaxis paste.
A. Both statements are false
B. Both statements are true - Answer B. Both statements are true
Dental companies now offer various formulas of toothpastes corresponding to hundreds of
products available on the market, adapting to the taste of the patients. Also, toothpastes in the
form of powder (or plant extracts) can alter dental structures and increase their abrasion.
Several of them contain hard, insoluble, irregularly shaped substances or crystals which
constitute risk factors for dental structures. For example, the rate of abrasion of Sunstar's fine
prophylactic paste, bubble gum flavored, is 6.89% while the powder herbal toothpaste reaches
9.15% which is very damaging to all dental structures.
p 399
Sodium bicarbonate, wet or dry, is as abrasive to remove stains. Hydrogen peroxide included in
whitening toothpaste is always effective for eliminating stains.
A. Both statements are false
B. Both statements are true - Answer A. both statements are false
The abrasiveness of bicarbonate is slightly higher than if it is wet. A mild abrasive will therefore
be less effective in eliminating stains. The peroxide, at a minimum concentration of 1% is
necessary to obtain a whitening action, but this percentage is not always indicated on
toothpastes. Its effectiveness then becomes uncertain
p 398
In an adult without recession, which of the following statements is accurate regarding the
interaction between pH and abrasiveness of toothpaste?
,B. Neutral pH and low abrasiveness are protective factors for tooth surface.
C. Neutral pH and mild abrasiveness increase protective factors for biofilm removal.
D. High or basic pH and high abrasiveness increase protective factors to prevent stains. - Answer
D. High or basic pH and high abrasiveness increase protective factors to prevent stains.
Stains on teeth have many origins and toothpaste cannot do miracles by pretending to treat
them 100% The chemical action of high pH (basic or alkaline) cannot theoretically reduce some
extrinsic stains. On the contrary, it is an acidic pH that is needed to remove extrinsic stains. The
mechanical action of high abrasiveness may temporarily promote bleaching action.
p 399
sodium lauryl sulfate may cause
A. a metallic taste in the mouth.
B. a prickling sensation on the tongue.
C. aphthous ulcers.
D. a burning sensation - Answer C. aphthous ulcers
The SLS may irritate the epithelium and cause canker sores, aphthous ulcerations, or recurrent
mouth ulcers in some patients. That is why cocamidopropyl betaine is now more commonly
used as a detergent.
p 395
The following two products are incompatible: sodium lauryl sulfate and Chlorhexidine. The
following two products are incompatible: fluoride and chlorhexidine.
,SLS reduces the anti plaque effect of CHG. Therefore a patient using a dentifrice containing SLS
or fluoride should wait at least 30 minutes before using chlorhexidine- based mouthwash.
p 395
Patients are generally adept at selecting the right toothpaste for their specific dental needs.
Dental hygienist prioritize a medicinal agent specific to the needs of the patient instead of the
Patient being influenced by advertising.
A. Both statements are true
B. Both statements are false
C. First statement is true, second is false
D. First statement is false, second is true - Answer D. First statement is false, second is true
Patients usually choose toothpaste according to the price, unless a dental professional
recommends a specific medicinal agent to effectively solve a problem. DH regularly consult the
scientific evidence to update their knowledge about toothpastes.
p 402
Assessing the patient's health is essential before recommending toothpaste, because the risk of
adverse reactions is not negligible. A child may suffer an anaphylactic shock due to some
allergenic ingredients included in the toothpaste, not indicated on the package.
A. Both statements are true
B. Both statements are false - Answer A. Both statements are true
Regardless of the age of the patient, toothpastes become protective factors and also risk factors
for patient's health. For example, some toothpastes contain derivatives of eggs (white or yolk),
milk (casein), bees (propolis), seafood (fish, crustacean, molluscs), aspirin (ASA), and coloring
agents (the main allergen of toothpastes). It is better to prevent than to find out too late any
complications that would be related to the imprudent recommendations of the DH.
p 398
, B. Cosmetic
C. Therapeutic
D. Hygienic - Answer A. scientific
Dentifrices can yield three types of effects. Cosmetic effect: prevents or removes stains, inhibits
supra gingival calculus formation, whitens teeth, freshens breath, controls oral malodor.
Hygiene effect: removes food particles and oral biofilm. Therapeutic effect: Prevents or reverses
dental caries; reduces gingivitis, oral biofilm, or dentinal hypersensitivity provided by medicinal
or active ingredients. The scientific aspect is pervasive in the hygienist's approach, but it is not a
desired effect at the base in the patient.
p 389
For a patient suffering from gastroesophageal reflux disease, which of the following
recommendations is correct?
A. wait 30 to 60 minutes before brushing teeth.
B. rinse mouth with salt and water
C. rinse mouth with water and baking soda solution.
D. rinse mouth with magnesium hydroxide solution (Maalox). - Answer B. rinse mouth with
salt and water
Basic products serve to neutralize acid pH. Those products can be diluted with a lot of water or
saliva that have a neutral pH. Salted water brings a clean- like feeling, eliminating uncomfortable
pieces of food, but the pH of GERD is too acid for for salted water to be am adequate solution ,
especially if the GERD are often
p 400
The threshold of demineralization of enamel with fluorapatite is at pH 5.5 or less. The threshold
of demineralization of cementum and dentin is at pH 6.5 or less.
