Cementum MCQs

Option A: Bone

Option B: Dentin

Option C: Cementum

Option D: Pulp

Correct Answer: Cementum ✔

Option A: Cementoid

Option B: Incremental line

Option C: Cellular cementum

Option D: Acellular cementum

Correct Answer: Cementoid ✔

Option A: Cellular cementum

Option B: Acellular cementum

Option C: Intermediate cementum

Option D: All of the above

Correct Answer: Cellular cementum ✔

Option A: Hyperplasia of cementum

Option B: Hypertrophy of cementum

Option C: Resorption of cementum

Option D: None of the above

Correct Answer: Resorption of cementum ✔

Option A: 55 to 60%

Option B: 60 to 65%

Option C: 65 to 70%

Option D: 70 to 75%

Correct Answer: 60 to 65% ✔

Option A: Avascular

Option B: Vascular

Option C: Has blood supply initially only

Option D: None of the above

Correct Answer: Avascular ✔

Option A: Hyperplasia

Option B: Hypoplasia

Option C: Hypertrophy

Option D: Excementoses

Correct Answer: Hyperplasia ✔

Option A: Does not exhibit features of either dentin of cementum

Option B: Predominantly seen in apical tow thirds of roots of molars and premolars and is rare in incisors or deciduous teeth

Option C: Represents area of entrapment of hertwig’s sheath in dentin or cementum

Option D: All of the above are correct

Correct Answer: All of the above are correct ✔

Option A: Cellular cementum

Option B: Acellular cementum

Option C: Both of the above

Option D: None of the above

Correct Answer: Cellular cementum ✔

Option A: Enamel meet cementum at a point

Option B: Enamel overlaps cementum

Option C: Cementum overlaps enamel

Option D: Both never meet

Correct Answer: Enamel overlaps cementum ✔

Option A: Dental cementum

Option B: Dental pulp

Option C: Enamel

Option D: Dentin

Correct Answer: Dental cementum ✔

Option A: Cervical third of the root

Option B: Middle third of the root

Option C: Apical third of the root

Option D: No secondary cementum forms

Correct Answer: Apical third of the root ✔

Option A: Sharpehy’s fibres and elastic fibres

Option B: Collagen fibres and blood vessels

Option C: Canaliculi and incremental lines

Option D: Lacunae and elastic fibres

Correct Answer: Canaliculi and incremental lines ✔

Option A: First formed cementum

Option B: Less calcified than acellular type

Option C: More calcified than acellular type

Option D: Less irregular

Correct Answer: Less calcified than acellular type ✔

Option A: Periodontal ligament

Option B: Alveolar bone

Option C: Cementum

Option D: Longbones

Correct Answer: Alveolar bone ✔

Option A: Less than dentin

Option B: More than dentin

Option C: Equal dentin

Option D: None of the above

Correct Answer: Less than dentin ✔

Option A: Forms during root formation

Option B: Forms after the eruption of the tooth

Option C: Seen at the coronal portion of the tooth

Option D: Formation is a slow process

Correct Answer: Forms after the eruption of the tooth ✔

Option A: Twisted

Option B: Curved

Option C: Pulp chamber

Option D: Lateral canal

Correct Answer: Pulp chamber ✔

Option A: Highly defined cellular zone near cemento – dentinal junction (CDJ)

Option B: Highly defined fibrillar zone near CDJ

Option C: Poorly defined zone near cemento-dentinal junction

Option D: Both a and B

Correct Answer: Poorly defined zone near cemento-dentinal junction ✔

Option A: 45 to 50%

Option B: 50 to 55%

Option C: 55 to 60%

Option D: 60 to 65%

Correct Answer: 45 to 50% ✔

Option A: Middle

Option B: Coronal

Option C: Apical

Option D: Interradicular

Correct Answer: Middle ✔

Option A: Cementum is thinnest at CEJ (20-50μm)

Option B: Cementum is thickest towards the apex (150-200μm)

Option C: The apical foramen is surrounded by cementum

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Anatomic repair

Option B: Functional repair

Option C: Physiological repair

Option D: Hyperplasia

Correct Answer: Anatomic repair ✔

Option A: Between enamel and cementum

Option B: Found at dentinocemental junction

Option C: Apical third

Option D: Coronal third

Correct Answer: Found at dentinocemental junction ✔

Option A: Cementum is more resistant to resorption than bone

Option B: Bone is more resistant to resorption than cementum

Option C: Both are equally resorbable

Option D: None of the above

Correct Answer: Cementum is more resistant to resorption than bone ✔

Option A: Ankylosis

Option B: Resorption of cementum

Option C: Hypertrophy of cementum

Option D: Hyperplasia of cementum

Correct Answer: Hyperplasia of cementum ✔

Option A: Ankylosis may occur

Option B: Exforliation of teeth occur

Option C: Delayed eruption

Option D: No change occurs

Correct Answer: Exforliation of teeth occur ✔

Option A: The uncalcified matrix of cementum is called cementoid

Option B: Cementum contain type I collagen predominantly

Option C: Cementodentinal junction is sometimes scallopes in deciduous teeth and smooth in permanent teeth

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Coronal half of root

Option B: Apical half of root

Option C: Apex of root

Option D: Entire root

Correct Answer: Coronal half of root ✔

Option A: Cementum meets enamel

Option B: Cementum overlaps enamel

Option C: Cementum does not meet enamel

Option D: All of the above

Correct Answer: All of the above ✔

Option A: Less than bone

Option B: More than bone

Option C: Equal to that of bone

Option D: More than that of enamel

Correct Answer: Less than bone ✔

Option A: 10%

Option B: 30%

Option C: 60%

Option D: 90%

Correct Answer: 30% ✔

Option A: Is derived from the sheath of hertwig

Option B: Is acellular in the apical third of the tooth

Option C: Often overlaps the enamel

Option D: Does not contain collagen fibres

Correct Answer: Often overlaps the enamel ✔