Human teeth 2
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University of sulaimania
School of science
Dp:biology
Practical comparative anatomy
Prepared by; HUMAN TEETH Sherzad.qadir abdullah
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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.
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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.
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Structure of a toothExternal parts of a tooth
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Internal Parts of a Tooth
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Human Anatomy
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ENAMEL DENTINE
PULP CAVITY
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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
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TOOTH DECAY NERVES
Blood Vessels
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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
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Type of teeth
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The teeth . . . humans have
8 incisors I
4 canines C
8 premolars P
12 molars M
abbreviations
molarpre molar
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foods are good for our teeth
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Foods that cause tooth decay
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cavities caused
Bacteria causes a build up of
plaque.
Plaque acid attacks the tooth The tooth eventually rots away
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Brush your teeth twice a day
Try not to eat too many sweets
Visit the dentist twice a year
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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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THANK YOU FOR LISTENS