This document provides information about human teeth. It discusses the structure and composition of teeth, including that teeth are made of calcium, phosphorus, and other minerals. It describes the different types of teeth in humans - incisors, canines, premolars, and molars - and their functions. The document includes diagrams labeling the external and internal parts of a tooth. It also provides a tooth eruption chart showing when primary and permanent teeth emerge. Other topics covered include tooth decay, plaque, the importance of brushing teeth, and eating habits that are good or bad for dental health.

1. University of sulaimania
School of science
Dp:biology
Practical comparative anatomy
Prepared by; HUMAN TEETH
Sherzad.qadir abdullah

2. Teeth are Made of:
 The hard material of the tooth is composed of calcium,
phosphorus, and other mineral salts.
 The material in the majority of the tooth is called dentine.
 The hard, shiny layer that you brush is called the enamel.

3. Human
 You have teeth soTeeth bite, crush or break your food.
that you can
 Teeth help to break down food so that your digestive system
can get the nutrients out of the food.
 You need energy to stay alive.
 Humans are omnivores. They eat plants and meat
 In adult humans there are 32 permanent teeth.

4. Structure of a tooth
External parts of a tooth

5. Internal Parts of a Tooth

6. Human Anatomy

7. ENAMEL DENTINE
PULP CAVITY

8. TYPES OF TEETH AND FUNCTION
INCISORS
wide, flat, sharp cutting edge
and snipping food
CANINE
 Shaped like daggers and
used for cutting
gripping,ripping food.
sometimes called eyeteeth.
MOLARS AND
PREMOLARS
 Flat surface used for
grinding molar teeth large
but pre-molar is smaller

9. TOOTH DECAY NERVES
Blood Vessels

10. Tooth Eruption Chart
Tooth Primary Permanent
Upper Teeth
Central Incisor 8-12 months 7-8 years
Lateral Incisor 9-13 months 8-9 years
Canine 16-22 months 11-12 years
1st Premolar - 10-11 years
2nd Premolar - 10-12 years
1st Molar 13-19 months 6-7 years
2nd Molar 25-33 months 12-13 years
Wisdom Tooth - 17-21 years
Lower Teeth
Central Incisor 6-10 months 6-7 years
Lateral Incisor 10-16 months 7-8 years
Canine 17-23 months 9-10 years
1st Premolar - 10-12 years
2nd Premolar - 11-12 years
1st Molar 14-18 months 6-7 years
2nd Molar 23-31 months 11-13 years
Wisdom Tooth - 17-21 years

11. Type of teeth

12. The teeth . . .
humans have
8 incisors I
4 canines C
8 premolars P
12 molars M
abbreviations
molar
pre molar

13. foods a re good for our te e th

14. Foods that cause tooth decay

15. cavities caused
Bacteria causes a build
up of plaque.
Plaque acid attacks the tooth The tooth eventually rots away

16. Brush your teeth twice a day
Try not to eat too many sweets
Visit the dentist twice a year

18. References
1. JoelWAger III,1 Ravi K Nalla,1,2,3 Guive Balooch,1,4 Grace
Kim,1,2 Megan Pugach,4 Stefan Habelitz,4
GraysonWMarshall,4 John H Kinney,5,6 and Robert O
Ritchie1,2 (2006).the Increasing Fragility of Human Teeth
With Age,Published by American Society for Bone and
Mineral Research,Volume 21(12):1879-1880.
2. Dr. Yusuf Emes Bull Int Assoc Paleodont. 2011;5(1):37-47.
Istanbul University Faculty of Dentistry, Department of
Oral and Maxillofacial Surgery Istanbul, Turkey
3. www.ischool.zm/media/dentition_in_humans
4. www.auburn.edu/academic/classes/zy/../Tooth
DevelopmentTxt
5. www.users.forthnet.gr/ath/abyss/dep1151.htm :

19. THANK YOU FOR LISTENS