University of sulaimania

School of science

Dp:biology

Practical comparative anatomy

Prepared by; HUMAN TEETH Sherzad.qadir abdullah

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.

Human Teeth You have teeth so that you can bite, crush or break

your food. 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.

Structure of a toothExternal parts of a tooth

Internal Parts of a Tooth

Human Anatomy

ENAMEL DENTINE

PULP CAVITY

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

TOOTH DECAY NERVES

Blood Vessels

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

Type of teeth

The teeth . . . humans have

8 incisors I

4 canines C

8 premolars P

12 molars M

abbreviations

molarpre molar

foods are good for our teeth

Foods that cause tooth decay

cavities caused

Bacteria causes a build up of

plaque.

Plaque acid attacks the tooth The tooth eventually rots away

Brush your teeth twice a day

Try not to eat too many sweets

Visit the dentist twice a year

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

DevelopmentTxt5. www.users.forthnet.gr/ath/abyss/dep1151.htm :

21/03/2009

References

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