Dentals MCQ File 3

1. Question

Regarding dento-alveolar trauma:

Concussion means injury to the supporting tissues of a tooth with displacement
Concussion means injury to the supporting tissues of a tooth without displacement
Luxation means no displacement of a tooth
Subluxation means loosening of a tooth in its socket with displacement
Subluxation means loosening of a tooth in its socket with a dento-alveolar fracture

2. Question

Non-steroidal anti-inflammatory drugs (NSAIDs) are best avoided in: Patients with a history of lacerations

All asthmatic patients
Patients on paracetamol
Children under the age of 6 years due to the possibility of Reye’s syndrome (aspirin) T
All of the above

3. Question

Which of the following statements are not correct?

Bleaching systems can adversely affect micro filled composites
Hypochlorite is a type of denture cleanser
Fissure sealants all contain fluoride to aid remineralization of existing incipient lesions
Organic solvents can be used as a denture cleanser

4. Question

In which direction does the palatal root of the upper first molar usually curve towards:

Facial
Lingual
Mesial
Distal

5. Question

This is a systemic autoimmune condition affecting salivary and lacrimal gland tissue as well as connective tissue :

Sjögren Syndrome
Sialadenosis
Apert syndrome
Xerostomia

6. Question

The normal quantity of saliva secreted in a normal human adult is:

400 – 500 mL / day
700 – 800 mL / day
1200 – 1500 mL / day
1500 – 2000 mL / day

7. Question

Which of the following drugs has gingival hyperplasia as a side effect?

Phenytoin
Diclofenac
Nifedipine
Cisplatin

8. Question

Delayed eruption of teeth is a feature of which of the following conditions?

Cleidocranial dysostosis
Osteogenesis imperfecta
Leukemia
Scurvy

9. Question

The submandibular gland

Is the largest of the salivary glands
Empties via Stensen’s duct
Doesn’t have a duct that is closely related to the lingual nerve
Is the gland most commonly affected by salivary gland calculi.
Is not a mixed salivary gland

10. Question

Which of the following could cause a crossbite?

Thumb-sucking habit.
Osteogenesis imperfecta
Talons cusp
Amelogenesis imperfecta

11. Question

Penicillins

Are the antibiotic of choice for anaerobic infections
Rarely cause allergic reactions
Are bacteriocidal
Are antagonistic to metronidazole

12. Question

Regarding zinc phosphate cements:

The powder is primarily zinc phosphate and the liquid a solution of phosphoric acid.
They have an endothermic setting reaction
The cement is mixed on a waxed paper mixing pad
Retention is via chemical bonding

13. Question

Which of the following would be an indication for indirect pulp capping

Where any further excavation of dentine would result in pulp exposure
Removal of caries has exposed the pulp
When carious lesion has just penetrated DEJ
A & B

14. Question

What lesion has the highest malignancy tendency of the following;

Leukoplakia
Erythoplakia
Aphthous ulcers
Candidiasis

15. Question

A patient presents complaining of a dry mouth. Which of the following would be suitable initial investigations to carry out to help determine the cause of the problem?

A CT scan of the major salivary glands
Mucosa biopsy
Blood tests to determine anti-Lo and anti-Ra antibodies
Salivary flow rate

16. Question

Which of the following conditions are strongly associated with human immunodeficiency virus (HIV) infection?

Kaposi’s carcinoma
Halitosis
Lichen planus
Necrotising ulcerative gingivitis

17. Question

Regarding dental fluorosis:

It affects deciduous teeth and permanent teeth equally
It causes white or brownish mottling of teeth
Mottled teeth are more susceptible to caries than teeth not exposed to fluoride
It occurs in areas when the fluoride in drinking water exceeds 0.1ppm

18. Question

Dry mouth

can be caused by radiation therapy
Cannot occur in diabetes mellitus
Cannot occur with anxiety
Occurs when the salivary flow rate falls below the normal of 1 ml/min

19. Question

Which is most closely associated with amelogenesis imperfecta

Osteogenesis imperfecta
Dentinogensis imperfecta
Taurodatism
Dilacerated roots

20. Question

What are the appropriate drugs and dosages for use in the following emergencies?

In a suspected diabetic hypoglycaemic collapse where the patient is unconscious, 50ml of 20% glucose intravenously
In suspected status epilepticus – 1 mg midazolam
In a suspected angina attack – glyceryl trinitrate intramuscularly
In a suspected diabetic hypoglycaemic collapse where the patient is unconscious give glucagon 10 mg intramuscularly

21. Question

Regarding zinc oxide–eugenol cements:

Eugenol exaggerates pulpal pain
The setting reaction of zinc oxide–eugenol is retarded by water
When mixing, all the powder is added to the liquid in one go
Zinc oxide–eugenol cements may be used as a base or a temporary luting material

22. Question

Which of the following statement best describe the clinical effectiveness of fluoride gels?

The clinical effectiveness of fluoride gels varies, depending in part on the method and frequency of application
The incidence of dental caries is reduced significantly
Reductions in dental caries vary between 37% and 41% when a gel is applied monthly.
A 1-minute application of APF gel is equally effective as a 4 minute application

23. Question

The following are classes of impression materials except?

Inelastic
Elastic
Reversible
Lipophilic

24. Question

You wish to provide symptomatic relief for a patient with a dry mouth. Which of the following drugs could be used?

Saliva Orthana
Glandosane
Pilocarpine
A & C
A, B & C

25. Question

Which of the following are treatments options for lichen planus?

No treatment
Fluconazole
Radiotherapy
Pilocarpine

26. Question

Regarding dental caries:

Lactobacilli are the bacteria that are the main cause of dental caries
Cariogenic bacteria produce acid
Glucose is more cariogenic than sucrose
Sugar alcohols (polyols) are cariogenic

27. Question

Burning mouth syndrome (oral dysaesthesia, glossodynia):

Isn’t more common in females than males
Usually affects patients 20 years of age
May occur in patients who are stressed or depressed
Is always associated with vitamin B1 deficiency

28. Question

Which of the following factors would increase a child’s risk for caries?

Coming from an affluent family
Having a well-educated mother
High caries rate in siblings
Exposure to fluoride
Having a normal salivary flow rate

29. Question

Paracetamol is:

Anti-pyretic.
Anti-inflammatory
Locally acting
Taken in doses of 200 mg –500mg four times a day in adults

30. Question

Long term effect of radiotherapy to oral mucosa is characterized by:

Epithelium becomes more keratinized.
Sub mucosa becomes highly vascular
Break down & delayed healing, sub mucosa less vascular
No sub mucosal fibrosis
Epithelium becomes thin & there is rapid healing

31. Question

Which of the following is false of etching solutions?

It is usually a 37% phosphoric acid solution or gel
It is allowed to over etch the immediate vicinity of the fissure
It is applied liberally to the central fissure area but not allowed to contact other tooth surfaces.
It is left on the tooth for 60 seconds and the rinsed off with water for 15 seconds.

32. Question

Which of the following is not a component of Local anesthetic agent:

Thymol
Ringer solution
Nitrogen bubbles
None of the above

33. Question

Which of the following drugs can result in tooth discoloration?

Chlorhexidine
Tetracyclines
Alcohol
A & B
Minocycline

34. Question

Regarding aphthous ulcers:

They are more common in males
The herpetiform-type are more common in males
Haematinic deficiencies are detected in approximately 50% of cases
They can be associated with cessation of smoking
They are often helped by the used of antidepressants

35. Question

In syphilis:

A primary chancre in the oral cavity may appear about 3–4 weeks after infection
The primary chancre is also known as a snail track ulcer
The primary chancre often heals after 2 months with severe scarring
The tertiary stage involves the appearance of well-defined, rounded areas known as mucous patches

36. Question

You performed an extraction 3 hours earlier on a fit and healthy patient. The patient has returned to the surgery complaining of bleeding from the extraction site. The appropriate management options are:

Lie the patient in the chair to calm them down
Get the patient to bite on a gauze pack.
Pack the socket with Alvogyl
Suture the socket using Prolene sutures

37. Question

Which of the following situations would be appropriate for using fissure sealants?

On the deciduous molars of a child with extensive caries in their deciduous teeth
On the permanent molars of a child with extensive caries in their deciduous teeth.
In a caries-free child
Only within 24 months of the eruption of the tooth in question

38. Question

Which of the following are anti-fungal drugs?

Miconazole
Aciclovir
Chlorhexidine
Danazol

39. Question

Inflammation of most or all of the para nasal sinuses simultaneously is described as:

Pan sinusitis
Sinusitis
Para nasal sinusitis
Para sinusitis
Sinus thrombosis

40. Question

Which of the following is the best choice of restorative material to achieve moderate to high strength, fluoride release and esthetics?

Composite
Compomer
Resin-modified glass ionomer
Glass ionomer

41. Question

A fracture commonly seen in children;

Simple fracture
complicated fracture
Greenstick
No fracture seen in children

42. Question

Causes of halitosis include

Starvation
Alcohol
Renal failure
Hepatic failure
All the above

43. Question

Patients with which of the following conditions are more likely to get oral candidal infections than those without?

Patients undergoing chemotherapy
Sjögren’s syndrome
Diabetes mellitus
Malnourishment
All the above

44. Question

Salivary calculi:

Commonly cause dry mouth
Occur most commonly in the sublingual gland
Occur most commonly in the parotid gland
Are always visible on radiographs
May be asymptomatic

45. Question

You are seeing a patient with an odontogenic infection. Which of the following factors would indicate that this is a severe infection which will require admission to hospital?

Temperature of 38.5 °C
Previous episode of pain
moderate pain
Bradycardia

46. Question

Which of the following methods of topical fluoride application are appropriate in an 8-year-old child (who lives in an area with < 0.3 ppm of fluoride in the water supply)?

Toothpaste with 500 ppm of fluoride
Toothpaste with 1350 ppm of fluoride
0.5 mg fluoride tablets daily
0.05% fluoride mouthwash weekly

47. Question

Which of the following drugs cause a dry mouth?

Heavy metal poisoning
Anti-malarials
Anti-malarials
Anti-emetics.

48. Question

Maxillary sinus is usually involved in fractures:

Le fort 1.T
Zygomatic arch fracture
Le fort 3
Nasoethmodial fracture
Symphysis fracture

49. Question

When is the best time to polish amalgam restoration?

Immediately
A week after
24 hours after
A & C

50. Question

Regarding Bell’s palsy:

It is an upper motor neurone lesion
It causes a unilateral paralysis of all the muscles of facial expression.
It is thought to be due to compression of the facial nerve in the pterygomaxillary fissure
It is usually treated with low-dose steroids