Oral Physiology and Dentition Overview

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Questions and Answers

In the numbering system, which tooth is designated as the first?

Canine

First molar

Central incisor (correct)

Lateral incisor

How many teeth are present in one quadrant?

8 (correct)

What letters are used to represent deciduous teeth?

A to F

A to G

A to D

A to E (correct)

In the FDI system, what does the left digit indicate?

The quadrant Signup and view all the answers

How are teeth represented in the FDI system?

By a two-digit number Signup and view all the answers

Which quadrant corresponds to the permanent upper left quadrant in the FDI system?

2 Signup and view all the answers

How many total quadrants are designated for deciduous teeth?

4 Signup and view all the answers

In the FDI system, what number represents the lower right quadrant for permanent teeth?

4 Signup and view all the answers

Which anatomical part is NOT listed as part of the oral cavity?

Gums Signup and view all the answers

What is the correct FDI number for the deciduous lower left quadrant?

7 Signup and view all the answers

How many total teeth are present in the upper maxillary arch?

10 deciduous and 16 permanent teeth Signup and view all the answers

What is the total number of quadrants in a full set of dentition?

4 quadrants Signup and view all the answers

Which type of tooth is NOT included among the 5 deciduous teeth in each quadrant?

First premolar Signup and view all the answers

Which term refers to teeth that are not preceded by deciduous teeth?

Permanent molars Signup and view all the answers

Which of the following tooth types is primarily responsible for grinding food?

Molars Signup and view all the answers

How many permanent teeth are present in each quadrant of permanent dentition?

8 teeth Signup and view all the answers

What is the role of the first premolar in permanent dentition?

Replaces the deciduous first molar Signup and view all the answers

What is the term for teeth that succeed the deciduous teeth?

Permanent successors Signup and view all the answers

Which surface of the tooth is referred to as the outer surface towards the face in anterior teeth?

Facial surface Signup and view all the answers

What is the name of the surface that faces away from the midline?

Distal surface Signup and view all the answers

Which term is used to describe the masticatory surface of posterior teeth?

Occlusal surface Signup and view all the answers

When dividing the tooth surfaces into thirds, this division can occur in which of the following sections?

Both horizontally and vertically Signup and view all the answers

In terms of tooth surfaces, what is the term for the surface facing the neighboring tooth?

Proximal surface Signup and view all the answers

What is the lowest third section in the vertical division of teeth?

Apical third Signup and view all the answers

Which of the following is NOT a facial surface division?

Cervical third Signup and view all the answers

In the vertical division of a molar, which surfaces are considered the mesial and distal thirds?

Facial and lingual surfaces Signup and view all the answers

Which third would refer to the area closest to the biting edge of anterior teeth?

Incisal third Signup and view all the answers

What defines the middle third in vertical division regarding tooth structure?

It is the area located between the cervical and occlusal thirds. Signup and view all the answers

Study Notes

Terminology

Oral physiology - the study of the functions of the mouth and its related structures
Morphology - the study of the form and structure of organisms and their parts
Anatomy - the study of the structure of living organisms

Teaching Methods

Lectures
Lab
Carving
Drawing
Identification

Evaluation

Written exam
- Quizzes
- Midterm
- Final
Practical exam
- Final
- Continuous evaluation
Oral exam
- Final

Dentition

Sets of dentition
- Deciduous (primary, baby, temporary)
- Permanent (adult, secondary)
Dental arches
- Each set of dentition contains two arches: maxillary (upper) and mandibular (lower).
- Maxillary arch contains 10 deciduous teeth and 16 permanent teeth.
- Mandibular arch contains 10 deciduous teeth and 16 permanent teeth.
Quadrants
- Each arch has two quadrants, making a total of 4 quadrants per set of dentition.
- Each quadrant contains 5 deciduous teeth and 8 permanent teeth.

Types of Teeth

Incisors: located in the front of the mouth, used for cutting and biting food
Canines: located next to the incisors, used for tearing food
Premolars: located behind the canines, used for crushing and grinding food
Molars: located at the back of the mouth, used for grinding and chewing food

Deciduous Dentition

Each quadrant contains 5 teeth: central incisor, lateral incisor, canine, first molar, second molar

Permanent Dentition

Each quadrant contains 8 teeth: central incisor, lateral incisor, canine, first premolar, second premolar, first molar, second molar, third molar

Successional and Non-Successional Teeth

Each deciduous tooth is replaced by a permanent tooth, called a successor or succedaneous tooth.
The remaining 3 molars (first, second, and third) are non-successional because they are not preceded by deciduous teeth.

Permanent Tooth Numbering

Permanent central incisor (replacing deciduous central incisor)
Permanent lateral incisor (replacing deciduous lateral incisor)
Permanent canine (replacing deciduous canine)
First premolar (replacing deciduous first molar)
Second premolar (replacing deciduous second molar)
First, second, and third molars erupt directly and are not preceded by deciduous teeth.
The quadrant numbering starts from the central incisor: 1- central incisor, 2- lateral incisor, 3- canine, 4- first premolar, 5- second premolar, 6- first molar, 7- second molar, 8- third molar

FDI System (Binomial System)

Uses two digits to represent each tooth.
The left digit indicates the quadrant.
The right digit indicates the tooth number within the quadrant.
Quadrants are numbered as follows: 1- permanent upper right quadrant 2- permanent upper left quadrant 3- permanent lower left quadrant 4- permanent lower right quadrant 5- deciduous upper right quadrant 6- deciduous upper left quadrant 7- deciduous lower left quadrant 8- deciduous lower right quadrant

Anatomical Parts of the Oral Cavity

Upper lip
Palate
Cheek
Tongue
Vestibule
Lower lip
Floor of the mouth

Tooth Description

Five surfaces:
- Lingual surface (towards the tongue): Can also be called palatal for maxillary teeth.
- Palatal surface (towards the palate): Only for maxillary teeth.
- Facial surface (outer surface of the tooth towards the face): Called labial for anterior teeth, and buccal for posterior teeth.
- Occlusal surface (masticatory surface of posterior teeth)
- Incisal surface (edge, masticatory surface of anterior teeth)

Proximal Surfaces

Distal Surface: The surface facing the neighboring tooth away from the midline.
Mesial Surface: The surface facing the neighboring tooth closer to the midline.

Division of Surfaces into Thirds

Crown surfaces can be divided horizontally or vertically into thirds.
The root can also be divided horizontally and vertically into thirds.
- Horizontal Divisions:
  - Crown: cervical third, middle third, occlusal or incisal third
  - Root: cervical third, middle third, apical third
- Vertical Divisions:
  - Facial or Lingual surfaces: Mesial third, middle third, distal third
  - Facial or Lingual surfaces: Labial or buccal third, middle third, lingual third

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Description

This quiz covers the fundamentals of oral physiology, morphology, and anatomy. Test your knowledge on the structure and functions of the mouth, different sets of dentition, and the dental arches. Suitable for students studying dentistry or related fields.