Calcification and Eruption of Teeth ( Oral Anatomy ) MCQs – Medical MCQs
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Latest Calcification and Eruption of Teeth ( Oral Anatomy ) Mcqs
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The correct dentition in a 9- years old child is_____________?
A. 12 CDE6
Once the enamel formation is complete, the tooth will erupt after approximately______________?
A. Two years
B. One year
C. Three years
D. Four years
Calcification of all teeth except last molars are completed by____________?
A. 4 years
B. 2 years
C. 6 years
D. 8 years
The time taken for primary tooth root completion after eruption_____________?
A. 2 years
B. 1 years
C. 3 years
D. 1 month
Calcification of third molar begins at__________________?
A. 18 months
B. 8 months
C. 8 years
D. 16 years
Kalu, a 6- years – old child, received tetracycline. Noticeable discoloration will be seen in______________?
A. Premolars, incisors and 1st molars
B. Incisors and 1st molars
C. Canines, premolars and2nd molars
D. Canine and 2nd molars
What is the amount of time required by erupting premolar to move through 1 mm of bone as measured on a bite – wing radigraph ?
A. 5-6 months
B. 4-5 months
C. 3-4 months
D. 6-7 months
Eruption date of decidous maxillary 2nd molar is ______________?
A. 18 months
B. 20 months
C. 24 months
D. 28 months
Number of teeth seen on X- ray at birth_______________?
Which of the following is dental formula of a 9 years old child_____________?
A. 6 EDC21/ 6EDC21
C. 6EDCBA/ 6EDC21
D. 76EDC21/ 7EDC21
First evidence of initiation of primary dentition is usually around_____________?
A. 4 months in utere
B. 4 months after birth
D. One year after birth
Generally in majority of children, the sequence of eruption of permanent teeth in mandible is____________?
A radiograph of 4- years old child reveals no evidence of calcification of mandibular second pre molar. This indicates______________?
A. The child may never develop premolars
B. The teeth may develop later
C. Primary second molar extracted to allow mesial drifting of permanent first molar
D. It is too early to make final predication
The most common sequence of eruption of the permanent maxillary teeth in children is_______________?
The decidous canine emerges______________?
A. Before first molar
B. Before lateral incisor
C. After first molar
D. After second molar
Calcification of roots of decidous teeth is completed by_____________?
A. 6 years
B. 4 years
C. 2 years
D. 8 years
The eruption are of maxillary permanent lateral incisor is_____________?
A. 8-9 years
B. 10-11 years
C. 6-7 years
D. 8-9 months
In anxious parent calls you that her 5-month-old child has still no teeth in his mouth then you should_____________?
A. Child has retarded growth
B. Tell her that it is normal at this age
C. Call and do radiographic survey
D. Systemic problem
First permanent molars begin to calcify at ______________?
A. Before decidous incisors
B. At birth
C. 6 months of intra utrerine life
D. About 1 year after birth
Maxillary primary cuspid enamel completion takes place at______________?
A. 6 months after birth
B. 6 months in utero
C. 9 months in utero
D. 9 months after birth
The tooth bud for the third molar is initiated at about the age of______________?
A. 1st year of life
B. 6th month I.U
C. 2nd year of life
D. 8th year of life
The first macroscopic indication of morphologic development of primary incisors approximately at____________?
A. 11 weeks in utero
B. 16 weeks in utero
C. 14 weeks in utero
D. 6 weeks in utero
A new tooth is erupting in the mouth of a one and a half year old child. This tooth is most likely to be a decidous___________?
A. Mandibular lateral incisor
B. Maxillary central incisor
C. Maxillary lateral incisor
D. Maxillary canine
The first evidence of calcification of primary anterior teeth begins approximately between ______________?
A. 14 to 17 weeks in utero
B. 6- to 9 weeks in utero
C. 9 to 12 weeks in utero
D. 17 to 20 weeks in utero
Which of the following is true about calcification of teeth ?
A. Calcification of primary teeth is almost complete at time of birth
B. Calcification of all primary teeth and few permanent teeth complete at birth
C. Calcification of primary teeth starts around birth
D. Calcification of all permanent teeth complete at birth
The process of exfolitation of primary teeth is between_____________?
A. Seventh and ninth years
B. Seventh and eight years
C. Seventh and tenth years
D. Seventh and Twelfth years
The teeth that are retained for the longest period of time are__________________?
A. Maxillary incisors
B. Mandibular canines
C. Mandibular incisors
D. Maxillary canines
E. B & D
In how many years, the central incisors erupt as permanent teeth ______________?
A. 8-9 years
B. 6-7 years
C. 10-12 years
D. 17-25 years
Beginning of eruption of permanent tooth starts_____________?
A. when root formation starts
B. When apical third root is still to be formed
C. When half of the root is still to be formed
D. After completion of root
Root completion of the mandibular first molar takes place by the age_______________?
A. 8-9 years
B. 7-8 years
C. 9-10 years
D. 10 – 11 years
First evidence of calcification of maxillary permanent central incisors occurs at_____________?
A. 3-4 months
B. 2-3 years
C. 10-12 months
D. 3-4 years
Primary canine erupts______________?
A. After D
B. After B
C. Before B
D. After E
In the majority of situations, the first decidous tooth to erupt is the______________?
A. Mandibular central incisor
B. Maxillary central incisor
C. Mandibular first molar
D. Maxillary second molar
Which of these teeth are highly sturdy and usually the last ones to be lost ?
A. Central incisors
B. First molar
Before eruption the position of permanent mandibular incisor buds relative to primary incisors is_____________?
A. Inferior and facial
B. Superior and facial
C. Superior and lingual
D. Inferior and lingual
The root completion of permanent teeth is achieved after __________ years o eruption?
Growth of all permanent teeth except last molars is completed by___________?
A. 8 years
B. 6 years
C. 12 years
D. 17 years
Which of the following gives the best description of erupted permanent teeth typically seen in a 9-years old______________?
A. All teeth except third molars
B. Only molars
C. 1,2,4,5,6,7 in all quadrants
D. 1,2,6 in all quadrants
A six- year molar begins to calcify at______________?
A. 1 years after birth
B. At birth
C. Six months IU
D. 3 years age
As compared to permanent tooth , root formation in primary tooth______________?
A. Take less time
B. Same time
C. Take more time
D. Is complete when tooth erupts in oral cavity
There are two normal children of the same age and sex. In one, all the permanent teeth except the third molars have erupted.In the other,no permanent canines or premolars have erupted. How old are these children ?
A. 9 years
B. 7 years
C. 11 years
D. 13 years
At birth the following teeth are calcifying____________?
A. Primary incisors & first molar
B. Permanent canines
C. Primary canines & second molars
D. Permanent 3rd molar
A child has 12 permanent and 12 decidous teeth, what is his age____________?
A. 8½ years
B. 4½ years
C. 11½ years
D. 13½ years
Dentition of humans is_______________?
D. None of the above
While charting the dentition of a child, the pedodontist finds that the following teeth are present in all the four quadrants; permanent central incisor , permanent lateral incisor , decidous cuspid , decidous first molar, decidous 2nd molar and permanent 1st molar. The eruptive pattern may be considered most nearly normal for a child aged_____________?
A. 11-14 years
B. 7-10 years
C. 3-6 years
D. 15- 18 years
The first permanent tooth to erupt in the oral cavity is the_____________?
A. Maxillary central incisor
B. Mandibular first molar
C. Mandibular central incisor
D. Maxillary first molar
The usual order of appearance of the primary teeth in the mouth is____________?
A. Central incisors, lateral incisors, canines, second molars, first molars
B. Central incisors, first molars, lateral incisors, second molars, canines
C. Central incisors, lateral incisors, first molars canines, second molars
D. Central incisors, lateral incisors, first molars second molars, canines
Calcification of permanent first molar usually begins in the_____________?
A. In the sixth month of intrauterine life
B. Third month of intrauterine life
C. At birth
D. In the third month of extra uterine life
The last primary tooth to be replaced by a permanent tooth is usually the_____________?
A. Mandibular second molar
B. Maxillary second molar
C. Maxillary canine
D. Mandibular canine