DENT 111: Oral Anatomy Module 1

Questions and Answers

What does the term 'heterodont' refer to?

Humans have varying tooth shapes that align with the teeth’s individual function.

What is a diphyodont dentition?

Humans have two sets of teeth.

What is the first set of teeth in humans called?

Deciduous dentition

At what age do all primary teeth usually erupt?

2 years and 6 months Signup and view all the answers

What are the classifications of teeth in human dentition?

Anterior and posterior teeth Signup and view all the answers

What is the significance of the FDI Two Digit System in dentistry?

It denotes the type and number of each type of teeth in a half-arch dentition. Signup and view all the answers

The first permanent tooth typically erupts at age ____.

6 Signup and view all the answers

The total number of primary teeth is calculated as (Total no. of teeth in a half-arch) x ___.

2 Signup and view all the answers

Humans only have one set of teeth throughout their lifetime.

False Signup and view all the answers

Study Notes

Introduction to Oral Anatomy

Oral anatomy is the study of the stomatognathic system, encompassing the teeth and supporting structures.
Key terms: "stoma" refers to the mouth, while "gnatha" relates to the jaw or temporomandibular joint.

Dentition Formation

Human dentition is classified as diphyodont and heterodont:
- Diphyodont means having two successive sets of teeth.
- Heterodont describes the variety of tooth shapes aligning with their functions.

Dental Formulas

Dental formulas describe the types and number of teeth in a half-arch:
- Universal system uses letters and numbers. For example:
  - I = incisor
  - C = cuspid (canine)
  - PM = premolar
  - M = molar

Primary Dentition

Primary teeth, also known as deciduous teeth, are the first set:
- Begin erupting around 6 months old.
- Usually, all primary teeth erupt by age 3.5.
- Total count: 20 primary teeth.

Permanent Dentition

The second set of teeth, known as permanent dentition:
- First permanent tooth typically erupts around age 6.
- All permanent teeth should emerge by ages 17-25, excluding third molars.
- Total count: 32 permanent teeth.

Mixed Dentition

Mixed dentition occurs when both primary and permanent teeth are present:
- Typically observed between ages 6-12 until all primary teeth are shed.

Types of Teeth

Dentition is categorized into anterior and posterior teeth:
- Anterior Teeth (front teeth):
  - Incisors and cuspids (canines).
- Posterior Teeth (at the corners):
  - Premolars and molars.

Description

This quiz covers the fundamentals of oral anatomy, focusing on the concept of heterodont dentition in humans. You will explore the varying shapes of teeth and their alignment with individual functions. Test your understanding of key terms and landmarks in oral anatomy as introduced in Module 1.