Download Oral Radiology- Dental Caries MCQs

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Oral Radiology Dental Caries MCQs Practice

Which organism contributes the MOST toward tooth demineralization?

· Treponema denticola.

· Streptococcus mutans.

· Fusobacterium nucleatum.

· Porphyromonas gingivalis.

Clinically, which is indicative of an active carious lesion?

· Opaque.

· Dark.

· Chalky white.

· Brownish spot.

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.

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

· Occupation.

· Oral hygiene.

· Age.

· Fluoride exposure.

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

· Diet.

· The tooth.

· Microflora.

· Periodontal probing.

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

· Visual.

· Tactile.

· Transillumination.

· Radiographic.

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

· Panoramic.

· Occlusal.

· Bitewing.

· Periapical.

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.

The most common adult bitewing film is size

· 0.

· 2.

· 3.

· 4.

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

· 0.

· 1.

· 2.

· 3.

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.

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

· Panoramic.

· Occlusal.

· Bitewing.

· Periapical.

Which traditional intraoral film is NOT recommended for bitewing radiographs?

· 0.

· 1.

· 2.

· 3.

Which tool does NOT aid in conventional radiographic interpretation?

· Light box.

· Sufficient light.

· Magnifying viewer.

· Borderless radiographic mounts.

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.

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

· band.

· notch.

· triangle.

· thin line.

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

· Contact point.

· Free gingival margin.

· Buccal restorations.

· Interproximal restorations.

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

· 0% to 10%.

· 10% to 20%.

· 20% to 30%.

· 30% to 40%.

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

· Pits and fissures.

· Convex surfaces.

· Cervical burnout.

· Mach band effect.

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.

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

· Tooth morphology.

· Enamel demineralization.

· Reproducible geometry.

· Excessive horizontal angulation.

Which method is used to verify proximal lesions in children?

· Diet analysis.

· Exploring occlusal pits and fissures.

· Tooth separation with orthodontic elastics.

· Periapical radiographs.

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

· arrested.

· incipient.

· cavitated.

· demineralized.

Which condition requires operative treatment?

· Brown spot.

· Incipient lesion.

· Cavitated lesion.

· Clinical chalky white area.

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.

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

· Lingual pits.

· Buccal surfaces.

· Occlusal surfaces.

· Interproximal surfaces.

Which color is NOT associated with early occlusal caries?

· Black.

· Beige.

· Yellow.

· White.

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.

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

· Shallow pits.

· Pulpal invasion.

· Cavitation visible on exam.

· Detectable radiographically.

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

· Enamel surface.

· Image of buccal pit.

· Composite restoration.

· Presence of cavitation.

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

· Scarcity.

· Thickness.

· Atomic number.

· X-ray beam intensity.

Which is uncharacteristic of buccal and lingual carious lesions?

· Round shape.

· Elliptic shape.

· Well-defined borders.

· Easily diagnosed on radiographs.

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.

Radiation caries usually begins in the

· lingual pit.

· interproximal region.

· cervical area.

· occlusal surfaces.