introduction to dental anatomy

Question 1

when primary dentition beings to make and when it ends

Answer 1

prenatally at 14 week in utero and ends postnatally at age of 3

Question 2

when does the first and last teeth emerges in primary dentition

Answer 2

first emerges at 6 months and the last at 28 (+-4 )months

Question 3

the deciduous dentition stays intact until the child is

Answer 3

6 years

Question 4

mixed dentition stays for how many years

Answer 4

6-12 years

Question 5

permanent dentition beings with thee mergence of

Answer 5

permanent molars, shedding of primary incisors and emergence of permanent incisors

Question 6

at what age the permanent dentition is completed and by shedding and emergence of what teeth?

Answer 6

the shedding of primary canines and molars and emergence of permanent canine and pre molars and 2 molar at the age of 14-15 years

Question 7

3 molars come at what age

Answer 7

18-25 years

Question 8

cusp

Answer 8

an elevation on the crown that makes up the divisional part of the occlusal surface

Question 9

tubercle

Answer 9

a small elevation on some part of the crown due to extra formation of enamel

Question 10

cinglum

Answer 10

lingual lobe of the anterior tooth. makes the bulk of the cervical third of the lingual surface

Question 11

ridge

Answer 11

linear elevation on the surface of the tooth and its names according to its location

Question 12

marginal ridges

Answer 12

rounded borders of enamel that form mesial and distal margin of occlusal surface of pre molars and molars and mesial and distal margins of lingual surface of incisor and canines

Question 13

triangular ridges

Answer 13

descend from the tip of the cusp to the central part of the occlusal surface (molars and premolars)

Question 14

transverse ridge

Answer 14

the buccal and lingual triangular ridges make up the transverse ridge. its the union of two triangular ridges

Question 15

oblique ride

Answer 15

ridge that rubs obliquely crossing the occlusal surface made by the union of the triangular ridge of distobuccal cusp and mesiolingual cusp

Question 16

a fossa

Answer 16

irregular depression (lingual or buccal fossa)

Question 17

triangular fossa

Answer 17

are found on molar and premolars mesial or distal to marginal ridges. found on lingual surface of maxillary incisor on the edge of lingual fossa

Question 18

sulcus

Answer 18

long depression on the surface of the tooth between cusp and ridges

Question 19

developmental groove

Answer 19

shallow groove or line between the primary part of root or crown

Question 20

pit

Answer 20

small pinpoint depression on the center or terminal of the developmental groove

Question 21

lobe

Answer 21

one of the primary sections of formation in the development of crown

Question 22

mamelon

Answer 22

are one of the 3 rounded protuberances found on the incisal edge of the newly erupted incisor

Question 23

single rooted teeth

Answer 23

madibular 1 and 2 premolar and maxillary 2nd premolar

Question 24

two rooted teeth

Answer 24

maxillary 1st molar (buccal and lingual) and mandibular molars of two roots (mesial and distal)

Question 25

3 rooted teeth

Answer 25

maxillary molars have 3 roots mesiobuccal distobuccal and lingual