Download Oral Radiology- Dental Caries MCQs | Dental MCQs

Download Oral Radiology- Dental Caries MCQs

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.


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