This document provides an introduction to dental anatomy, including tooth nomenclature and types. It discusses that humans have two sets of teeth: deciduous (primary/baby) teeth and permanent teeth. Deciduous teeth erupt around 6 months, with the full set of 20 teeth in place by 2.5 years. They are then replaced by 32 permanent teeth from around age 6, with the transition taking 20 years to complete. The document outlines the tooth numbering system and groupings of anterior and posterior teeth for both dentitions. It also introduces the maxilla and mandible bones that make up the upper and lower jaws.

1. Dental Anatomy
Lecture 1
Introduction

2. • Dense = Tooth
• Dental = anything related to
teeth
Nomenclature

3. • Human is a heterodent,
which means that he has di
ff
erent-shaped
teeth.
• Human is a diphyodont,
which means that he has two sets of teeth ;
1. Deciduous teeth (Primary teeth).
2. Permanent teeth (Secondary teeth).
Nomenclature

4. The Deciduous Teeth
Primary teeth

5. At Birth ( Natal Period )
• There are no teeth present in the
mouth, but many teeth in various
stages of development are found
in the jaws.
The Deciduous Teeth

6. After Birth ( Post- Natal Period )
• The eruption of deciduous teeth
starts at six months and lasts
until two and a half years.
The Deciduous Teeth

7. • They stay until the permanent
teeth erupt at about 6 years of
age, when the transition to the
permanent dentition begins.
The Deciduous Teeth

8. Number / Formula
• They are 20 in number.
• They have the following formula:
2 1 2
I — C — M — = 10 (for each side).
2 1 2
• I = Incisors (Central and Lateral).
• C = Canine.
• M = Molars (First and Second).
The Deciduous Teeth

9. The Permanent Teeth
Secondary teeth

10. • The transition to permanent
dentition begins with the
emergence and eruption of the
fi
rst permanent molars at the age
of six years.
The Permanent Teeth

11. • Followed by shedding of the
deciduous teeth and emergence
and eruption of the remaining
permanent teeth.
• This process requires about 20
years to be completed.
The Permanent Teeth

12. Number / Formula
• They are 32 in number (including third molars when
present).
• They have the following formula:
2 1 2 3
I — C — P — M — = 16 (for each side).
2 1 2 3
• I = Incisors (Central and Lateral).
• C = Canine.
• P = Premolars (First and Second).
• M = Molars (First, Second and third).
The Permanent Teeth

13. Anterior and Posterior
Teeth Groups

14. • Which include the Incisors and
the Canines.
Anterior Teeth

15. • Which include the Premolars and
the Molars.
Posterior Teeth

16. The Jaw

17. • Is the bone which carries the
teeth.
The Jaw

18. Upper and Lower
The Jaw types

19. • Which is
fi
xed.
• Called The Maxilla.
The Upper Jaw

20. • Which is Movable.
• Called The Mandible.
The Lower Jaw

21. END