Lecture 1 Maxillary Central Incisor

Question 1

What is included in the stomatognathic system?

A) Jaws
B) Temporomandibular Joint (TMJ)
C) Teeth
D) All of the above

Answer 1

D) All of the Above

Question 2

At what age does the maxillary central incisor typically erupt?

A) 5 years 8 months
B) 7 years and 6 months
C) 9 years 3 months
D) 12 years

Answer 2

B) 7 years and 6 months

Question 3

What is the approximate length of the maxillary central incisor?

A) 15-17 mm
B) 18-20 mm
C) 22-23 mm
D) 25-27 mm

Answer 3

C) 22-23 mm

Question 4

Which of the following best describes the shape of the maxillary central incisor crown from the labial aspect?

A) Round
B) Shovel-shaped
C) Triangular
D) Square

Answer 4

B) Shovel-shaped

Question 5

How is the mesial outline of the maxillary central incisor described?

A) Short and rounded
B) Long and flat
C) Curved and convex
D) Narrow and pointed

Answer 5

B) Long and flat

Question 6

Which tissue is the hardest and most calcified in the human body?

A) Dentin
B) Cementum
C) Enamel
D) Pulp

Answer 6

C) Enamel

Question 7

What is the primary function of cementum?

A) To cover the crown of the tooth
B) To form the tooth’s roots
C) To provide enamel with its hardness
D) To protect the pulp chamber

Answer 7

B) to form the tooth’s roots

Question 8

How many permanent teeth does an adult typically have?

A) 20
B) 24
C) 28
D) 32

Answer 8

D) 32

Question 9

Which of the following describes the pulp chamber of the maxillary central incisor?

A) Cone-shaped with multiple canals
B) Triangular with a flattened V-P shape
C) Circular with a smooth surface
D) Square with numerous extensions

Answer 9

B) Triangular with a Flattened V-P shape

Question 10

What is the clinical significance of the maxillary central incisor’s high volume?

A) Difficult to extract
B) Susceptible to caries
C) Easier to restore prosthetically
D) More prone to periodontal disease

Answer 10

C) Easier to restore prostheically

Question 11

Which of the following features describes the enamel of a tooth?

A) Mesodermal origin
B) 25% organic
C) 96-97% inorganic
D) Includes pulp chamber

Answer 11

C) 96-97% inorganic

Question 12

What does the term “difiodont” refer to?

A) Two generations of teeth
B) Multiple regeneration of teeth
C) Different types of teeth
D) Single set of teeth

Answer 12

A) Two generations of teeth

Question 13

What is the primary role of the stomatognathic system?

A) Digestion
B) Communication
C) Masticatory functions
D) Blood circulation

Answer 13

C) Masticatory functions

Question 14

Which of the following describes the mesial and distal outlines of the maxillary central incisor?

A) Both are flat
B) Mesial is shorter and more convex; Distal is longer and flatter
C) Mesial is longer and flatter; Distal is shorter and more convex
D) Both are equally convex

Answer 14

C) Mesial is longer and flatter, Distal is shorter and more convex

Question 15

What is the anatomical cervix of the maxillary central incisor characterized by?

A) A deep groove
B) A 25% enamel overlay
C) Meeting point of enamel and cementum
D) High transparency

Answer 15

C) Meeting point of enamel and Cementum

Question 16

Which dental tissue is primarily responsible for the formation of dentin?

A) Odontoblasts
B) Cementoblasts
C) Ameloblasts
D) Enameloblasts

Answer 16

A) Odontoblasts

Question 17

How does the cervical outline of the maxillary central incisor appear from the labial aspect?

A) Deep groove
B) Convex towards the apex
C) Flat and straight
D) Concave

Answer 17

B) Convex towards the apex

Question 18

What is a key characteristic of the dental hard tissue known as cementum?

A) It is found only on the crown of the tooth.
B) It has a mesodermal origin and is similar to bone.
C) It has a high content of enamel.
D) It is primarily responsible for tooth regeneration.

Answer 18

B) it has a mesodermal origin and is similar to bone

Question 19

How does the root of the maxillary central incisor typically appear?

A) Conical with multiple canals
B) Straight with a flat surface
C) Cone-shaped with a single canal
D) Triangular with a wide base

Answer 19

C) cone-shaped with a single canal

Question 20

What is the main feature of the cingulum on the lingual aspect of the maxillary central incisor?

A) A globular, hemisphere-like formation
B) A deep fissure
C) A large enamel overlay
D) A prominent cervical ridge

Answer 20

A) A globular. Hemisphere-like formation

Question 21

What distinguishes the proximal aspect of the maxillary central incisor from the other aspects?

A) It has a triangular shape with a convex labial outline and concave lingual outline.
B) It shows a flattened surface with minimal relief.
C) It is characterized by a rounded, smooth cervical outline.
D) It includes a straight incisal edge and a pronounced marginal ridge.

Answer 21

A) it has a triangular shape with a convex labial outline and concave lingual outline

Question 22

What is the primary function of the odontoblasts in dentin formation?

A) To create enamel
B) To form the root structure
C) To produce dentin
D) To repair cementum

Answer 22

C) To produce Dentin

Question 23

What is the function of the enamel in the tooth structure?

A) It forms the root of the tooth
B) It provides structural support to the pulp chamber
C) It covers the crown and provides protection
D) It aids in the regeneration of dentin

Answer 23

C) it covers the crown and provides protection

Question 24

How does the maxillary central incisor’s pulp chamber typically appear?

A) Round with 3-4 extensions
B) Flattened V-P shape with 3-4 extensions
C) Square with smooth walls
D) Elongated with a complex canal system

Answer 24

B) Flattened V-P shape with 3-4 extensions

Question 25

25. What is a key feature of the human dental formula for primary teeth?

A) 20 teeth with 10 on the top and 10 on the bottom
B) 32 teeth with 16 on the top and 16 on the bottom
C) 28 teeth with 14 on the top and 14 on the bottom
D) 18 teeth with 9 on top and 9 on the bottom

Answer 25

A) 20 teeth with 10 on top and 10 on the bottom