Roots of primary and secondary teeth are different in that the primary roots are more divergent and flaring. The other difference _____________?

Related Mcqs:

1. A 4-year old child has a normal complemented of primary teeth but they are gray and exhibit extensive occlusal and incisal wear. Radiographic examination indicates extensive deposits of secondary dentin in these teeth. Most likely this condition is______________?

   A. Neonatal hypoplasia
   B. Amelogenesis imperfecta
   C. Cleidocranial dysplasia
   D. Dentinogenesis imperfecta

2. In resorption of roots of the primary teeth, the dental pulp_____________?

   A. Plays a passive role
   B. Becomes a fibrotic non-vital mass
   C. Initiates resorption from the inner surface of roots
   D. Aids in formation of secondary dentin slowing down resorption

3. The primary teeth that present the most outstanding morpholgic deviations from permanent teeth are______________?

   A. Central incisors
   B. Mandibular first molar
   C. Mandibular second molar
   D. Canines

4. Primary teeth differ from permanent teeth in following aspects ?

   A. Thickness of enamel and dentin
   B. Pulp chambers are longer
   C. Roots are flaring
   D. All of the above

5. A 20yr old patient reports with multiple swelling of the jaws. Clinical examination reveals multiple hard swellings involving the jaws and intra orally several missing teeth are noticed. Panoramic radiograph reveals multiple radio opaque lesions in the maxilla and the mandible with multiple impacted teeth and supernumerary teeth indicative of Gardeners syndrome: The above mentioned condition is______________?

   A. Autosomal dominant disease
   B. Autosomal recessive disorder
   C. X-linked disease
   D. A syndrome of unknown cause

6. An abnormal resorption pattern in primary teeth, delayed eruption of permanent teeth and a large tongue are the feature of_____________?

   A. Addison’s disease
   B. Hypothyroidism
   C. Hyperthyroidism
   D. Von-Recklinghausen disease

7. Calcification of roots of decidous teeth is completed by_____________?

   A. 2 years
   B. 4 years
   C. 6 years
   D. 8 years

8. The crowns and roots of primary molar at their cervical portions are more____________?

   A. Slender mesiodistally
   B. Slender anteroposteriorly
   C. Bulkier mesiodistally
   D. Buliker anteroposteriorly

9. How many roots does a primary maxillary first molar have ___________?

   A. One
   B. Two
   C. Three
   D. Four

10. In Cleidorcranial dysostosis, sometimes the roots of the permanent teeth are_____________?

    A. Thin and long
    B. thin and short
    C. Thick and short
    D. Fused