Dental Caries - Disease & Clinical Management - 1
Not open book exam, do not try to google or open book or the world ends. There is a time limit of 25 minutes so, take your time, apply curd allover and answer. If you find any ambiguous or incorrect questions we can discuss later, which is not possible anyway. Think well and answer babe - love u miss u kiss u.
- 1.
A fully grown adult has _ teeth.
- A.
32 * 1
- B.
32 + 0
- C.
32/0
- D.
(322/16) * 0.5
Correct Answer
C. 32/0 -
- 2.
Which of the following are True?
- A.
The early stages in enamel dissolution does not involve a distinct disintegration of the actual enamel surface, even leading to microcavities
- B.
The common use of ‘dentin involvement’, however, is too vaguely defined to cover the continuum of changes occurring in the pulpo-dentinal organ during caries progression and, therefore, is useless as an indicator for operative treatment.
- C.
The obturated dentinal tubules appear opaque because the mineral in the tubules makes the tissue more homogeneous, increasing the scattering of light passing through the affected tissue.
- D.
Neither antimicrobial nor operative treatment are required to control the microorganisms within the root dentin
Correct Answer(s)
B. The common use of ‘dentin involvement’, however, is too vaguely defined to cover the continuum of changes occurring in the pulpo-dentinal organ during caries progression and, therefore, is useless as an indicator for operative treatment.
D. Neither antimicrobial nor operative treatment are required to control the microorganisms within the root dentinExplanation
The common use of 'dentin involvement' is too vaguely defined to cover the continuum of changes occurring in the pulpo-dentinal organ during caries progression and, therefore, is useless as an indicator for operative treatment. This means that the term 'dentin involvement' does not accurately describe the changes that happen in the pulpo-dentinal organ during the progression of caries. Therefore, it cannot be relied upon as an indicator for operative treatment. Additionally, the statement that neither antimicrobial nor operative treatment are required to control the microorganisms within the root dentin suggests that there are alternative methods to control the microorganisms in this area.Rate this question:
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- 3.
Which of the following are False?
- A.
Because sweet taste is a much stronger stimulant of saliva secretion than the tastes of salt and acid, the clearance rate quickly reaches the stimulated level when sugar is ingested.
- B.
Cystatins (cystein-containing phosphoproteins) are considered to be protective by inhibiting unwanted proteolysis of salivary proteins.
- C.
The risk of subnormal flow rates increases with the number of drugs taken by the patient, regardless of which drugs, so that subnormal flow becomes very common with more than three drugs per day.
- D.
When saliva contains fluoride, and together with salivary calcium and phosphate this strongly increases the solubility of enamel and promotes demineralization.
- E.
Option 5
Correct Answer(s)
A. Because sweet taste is a much stronger stimulant of saliva secretion than the tastes of salt and acid, the clearance rate quickly reaches the stimulated level when sugar is ingested.
D. When saliva contains fluoride, and together with salivary calcium and pHospHate this strongly increases the solubility of enamel and promotes demineralization.Explanation
The statement "When saliva contains fluoride, and together with salivary calcium and phosphate this strongly increases the solubility of enamel and promotes demineralization" is false. Saliva containing fluoride, calcium, and phosphate actually helps to remineralize enamel and prevent demineralization. Fluoride enhances the remineralization process by promoting the formation of fluorapatite, a more resistant form of enamel. Therefore, the statement contradicts the known effects of fluoride on enamel solubility.Rate this question:
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- 4.
Influence of different conditions on salivary gland function. Which of the following relate to decreased flow rate or caries risk.
- A.
Hyperthyroidism, Diabetes Mellitus, Epidemic parotitis
- B.
Hypothyroidism, Diabetes Mellitus, Cerebral Palsy
- C.
Hypothyroidism, Tuberculosis, Epidemic parotitis
- D.
Hyperthyroidism, Tuberculosis, Cerebral Palsy
Correct Answer
B. Hypothyroidism, Diabetes Mellitus, Cerebral PalsyExplanation
The correct answer is Hypothyroidism, Diabetes Mellitus, and Cerebral Palsy. These conditions are known to be associated with decreased salivary flow rate, which can increase the risk of developing dental caries. Hypothyroidism can lead to reduced saliva production, while Diabetes Mellitus can cause dry mouth due to increased blood sugar levels affecting salivary gland function. Cerebral Palsy can also affect salivary gland function and result in reduced saliva production.Rate this question:
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- 5.
Formate and hydrogen gas can be used as energy sources and electron donors in metabolic reactions by other biofilm bacteria such as _.
- A.
Campylobacter rectus
- B.
Veillonella
- C.
Actinomyces
- D.
Streptococcus
Correct Answer
A. Campylobacter rectusExplanation
Campylobacter rectus is a type of biofilm bacteria that can use formate and hydrogen gas as energy sources and electron donors in metabolic reactions. This means that Campylobacter rectus has the ability to break down and utilize formate and hydrogen gas to generate energy for its metabolic processes.Rate this question:
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- 6.
As the biofilm become thicker, a lowering of the oxygen concentration ( increased anaerobiosis) is one of the factors that helps to drive microbial succession.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
As a biofilm becomes thicker, the oxygen concentration decreases, leading to increased anaerobiosis. This change in oxygen levels is a crucial factor in driving microbial succession. As the oxygen diminishes, it creates an environment that favors the growth and survival of anaerobic microorganisms over aerobic ones. This shift in microbial composition is a natural progression that occurs as the biofilm develops and adapts to its changing conditions.Rate this question:
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- 7.
Which of the following are True?
- A.
In the extended ecological caries hypothesis, environmental acidification acts as the main driving force for both acid-induced adaptation and selection of the microflora in the dental biofilm.
- B.
Relatively high proportions of mutans streptococci cannot survive on tooth surfaces without caries developing.
- C.
Disease is not a result of a shift in the balance of the resident microflora driven by a change in local environmental conditions
- D.
Disease can be controlled by targeting the putative pathogens (mutans streptococci and other acidogenic/aciduric species) through interference with the factors that are driving the deleterious shifts in the balance of the microflora.
Correct Answer(s)
A. In the extended ecological caries hypothesis, environmental acidification acts as the main driving force for both acid-induced adaptation and selection of the microflora in the dental biofilm.
B. Relatively high proportions of mutans streptococci cannot survive on tooth surfaces without caries developing.
D. Disease can be controlled by targeting the putative pathogens (mutans streptococci and other acidogenic/aciduric species) through interference with the factors that are driving the deleterious shifts in the balance of the microflora.Explanation
The correct answer options state that in the extended ecological caries hypothesis, environmental acidification is the main driving force for acid-induced adaptation and selection of microflora in the dental biofilm. It also mentions that relatively high proportions of mutans streptococci cannot survive on tooth surfaces without caries developing. Additionally, it suggests that disease can be controlled by targeting the pathogens through interference with the factors causing shifts in the balance of the microflora.Rate this question:
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- 8.
High concentrations of fluoride in solution in the environment of the tooth are more beneficial in reducing caries than low concentrations of fluoride incorporated into enamel.
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
High concentrations of fluoride in solution in the environment of the tooth are not more beneficial in reducing caries than low concentrations of fluoride incorporated into enamel. This is because fluoride works by strengthening the enamel and making it more resistant to decay. When fluoride is incorporated into the enamel, it becomes a part of the tooth structure and provides long-term protection. On the other hand, high concentrations of fluoride in the mouth can cause enamel fluorosis, which is a cosmetic condition that affects the appearance of the teeth. Therefore, low concentrations of fluoride incorporated into enamel are more effective in reducing caries.Rate this question:
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Mar 21, 2023Quiz Edited by
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Jul 11, 2020Quiz Created by
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