ORAL RADIOLOGY MCQs

DENTAL CARIES

NBDE/NDEB/ADC/ORE/MDS

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which organism contributes the MOST toward tooth demineralization?

• Treponema denticola.
• Streptococcus mutans.
• Fusobacterium nucleatum.
• Porphyromonas gingivalis.

​

ANSWER IS B

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Clinically, which is indicative of an active carious lesion?

• Opaque.
• Dark.
• Chalky white.
• Brownish spot.

​

ANSWER IS C

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which radiographic consideration shows whether a carious lesion is active or arrested?

• Arrested lesions are not radiographically visible.
• Active lesions appear more radiopaque than arrested lesions.
• Demineralization appears more radiolucent than active lesions.
• Comparison of the initial image to a second image taken at a later date.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which patient characteristic is the LEAST important in determining the time interval between radiographic examinations?

• Occupation.
• Oral hygiene.
• Age.
• Fluoride exposure.

​

ANSWER IS A

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

All factors are interrelated with dental caries EXCEPT one. Which one is the EXCEPTION?

• Diet.
• The tooth.
• Microflora.
• Periodontal probing.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which is the BEST examination to disclose proximal carious lesions on posterior teeth?

• Visual.
• Tactile.
• Transillumination.
• Radiographic.

​

​

​

​

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which is the most valuable radiographic image for detecting carious lesions?

• Panoramic.
• Occlusal.
• Bitewing.
• Periapical.

​

ANSWER IS C

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which is the main purpose for using a film holder when exposing radiographic images?

• Eliminates interpretation errors.
• Facilitates source-to-film distance.
• Ensures horizontal overlap of images.
• Allows control of alignment of image receptor to teeth.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

The most common adult bitewing film is size

• 0.
• 2.
• 3.
• 4.

​

ANSWER IS B

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which film size is recommended for bitewing images of children younger than 4?

• 0.
• 1.
• 2.
• 3.

​

ANSWER IS A

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which best describes a tooth surface that is clinically intact?

• A white, mineralized area on the radiographic image.
• An occlusal surface with a visible, calcified cavitation.
• The appearance of a radiolucent area on an interproximal surface.
• A mineralized tooth surface with no breakdown leading to cavitation.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which image is used for detecting changes in the bone surrounding the teeth?

• Panoramic.
• Occlusal.
• Bitewing.
• Periapical.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which traditional intraoral film is NOT recommended for bitewing radiographs?

• 0.
• 1.
• 2.
• 3.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which tool does NOT aid in conventional radiographic interpretation?

• Light box.
• Sufficient light.
• Magnifying viewer.
• Borderless radiographic mounts.

​

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

All are limitations of solid-state sensors, EXCEPT one. Which one is the EXCEPTION?

• Stiffness of sensors.
• Thickness of sensors.
• Smaller surface area imaged.
• Cord attachment to computer.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

The classic radiographic shape of an early carious lesion is a radiolucent

• band.
• notch.
• triangle.
• thin line.

​

ANSWER IS C

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Proximal carious lesions are commonly found in each area, EXCEPT one. Which is the EXCEPTION?

• Contact point.
• Free gingival margin.
• Buccal restorations.
• Interproximal restorations.

​

ANSWER IS C

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which percentage of enamel demineralization occurs before proximal surface lesions are identifiable with digital imaging?

• a. 0% to 10%.
• b. 10% to 20%.
• c. 20% to 30%.
• d. 30% to 40%.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Each morphologic occurrence mimics a carious lesion, EXCEPT one. Which is the EXCEPTION?

• Pits and fissures.
• Convex surfaces.
• Cervical burnout.
• Mach band effect.

​

ANSWER IS B

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which statement is correct?

• Caries progresses quickly in most individuals.
• A carious lesion extending into the dentin is difficult to see radiographically.
• Demineralization in enamel is obvious radiographically.
• Overlapping contact points in the radiographic image can hinder caries detection.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

The detection of proximal surface caries is facilitated by which factor?

• Tooth morphology.
• Enamel demineralization.
• Reproducible geometry.
• Excessive horizontal angulation.

​

ANSWER IS C

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which method is used to verify proximal lesions in children?

• Diet analysis.
• Exploring occlusal pits and fissures.
• Tooth separation with orthodontic elastics.
• Periapical radiographs.

​

​

ANSWER IS C

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

When an active carious lesion is allowed to progress to form an actual hole, the tooth struc- ture is called

• arrested.
• incipient.
• cavitated.
• demineralized.

​

ANSWER IS C

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which condition requires operative treatment?

• Brown spot.
• Incipient lesion.
• Cavitated lesion.
• Clinical chalky white area.

​

ANSWER IS C

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

All are steps to monitor a lesion, EXCEPT one. Which one is the EXCEPTION?

• Operative treatment.
• Review site of lesion.
• Follow-up radiographs.
• Patient history of lesions.

​

ANSWER IS A

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which is the most common surface location of carious lesions in children and adolescents?

• Lingual pits.
• Buccal surfaces.
• Occlusal surfaces.
• Interproximal surfaces.

​

ANSWER IS C

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which color is NOT associated with early occlusal caries?

• Black.
• Beige.
• Yellow.
• White.

​

ANSWER IS B

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which lesion is easy to detect radiographically?

• An incipient lesion.
• One that crosses the dentinoenamel junction (DEJ).
• One confined to enamel.
• One with enamel demineralization.

​

ANSWER IS B

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

All are characteristics of deep carious lesions, EXCEPT one. Which is the EXCEPTION?

• Shallow pits.
• Pulpal invasion.
• Cavitation visible on exam.
• Detectable radiographically.

​

ANSWER IS A

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which factor does NOT contribute to the misdiagnosis of occlusal dental lesions?

• Enamel surface.
• Image of buccal pit.
• Composite restoration.
• Presence of cavitation.

​

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

All factors, EXCEPT one, affect the radiographic appearance of restorative materials. Which is the EXCEPTION?

• Scarcity.
• Thickness.
• Atomic number.
• X-ray beam intensity.

​

ANSWER IS A

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Which is uncharacteristic of buccal and lingual carious lesions?

• Round shape.
• Elliptic shape.
• Well-defined borders.
• Easily diagnosed on radiographs.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Therapeutic radiation to the head and neck is unlikely to elicit which side effect?

• Tooth structure change.
• Change in bacterial flora.
• Loss of salivary gland function.
• Breakdown of restorative materials.

​

ANSWER IS D

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material

Radiation caries usually begins in the

• lingual pit.
• interproximal region.
• cervical area.
• occlusal surfaces.

​

​

ANSWER IS C

ANSWER

WWW.DENTALBOOKS.IN

Dental Notes, PPT, PDF, Exams, MCQs, Flashcards, Ebooks, Mnemonics, Tips and Tricks, Study Material