Human teeth 2
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Human teeth 2

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prepared by sherzad qadir

prepared by sherzad qadir
university of suliamani
college of science
biology department
4th stage(2012-2013)

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  • Crown, part above gum. Has thick outer layer called enamel.Neck, part between crown and root. Provides direct contact with gum.Root, part within the jaw. Forms the cover called cementum.
  • Enamel, Dentine, Pulp Cavity, Blood Vessels, Nerves, and Fibres.
  • Enamel is the surface of a tooth, part of which is exposed Made up of a hard substance that contains calcium phosphate. Dentine is the bone like structure that surrounds the pulp cavity.Made up of tiny channels containing living cells Makes the tooth sensitive. Pulp cavity is in the middle of a tooth . It has soft tissues containing blood vessels and nerves
  • After a meal, bacteria in the mouth feed on any sugar present and turn it into acids. Acids eats the teeth and cause cavities. Nerves are found in the pulp cavity They make the tooth more sensitive Blood vessels are found in the pulp cavity.Blood vessels supply a tooth with oxygen and nutrients

Human teeth 2 Human teeth 2 Presentation Transcript

  • University of sulaimaniaSchool of scienceDp: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 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.
  • Structure of a tooth External parts of a tooth
  • Internal Parts of a Tooth
  • Human Anatomy
  • ENAMEL DENTINE PULP CAVITY
  • TYPES OF TEETH AND FUNCTIONINCISORS wide, flat, sharp cutting edge and snipping foodCANINE 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 PermanentUpper TeethCentral Incisor 8-12 months 7-8 yearsLateral Incisor 9-13 months 8-9 yearsCanine 16-22 months 11-12 years1st Premolar - 10-11 years2nd Premolar - 10-12 years1st Molar 13-19 months 6-7 years2nd Molar 25-33 months 12-13 yearsWisdom Tooth - 17-21 yearsLower TeethCentral Incisor 6-10 months 6-7 yearsLateral Incisor 10-16 months 7-8 yearsCanine 17-23 months 9-10 years1st Premolar - 10-12 years2nd Premolar - 11-12 years1st Molar 14-18 months 6-7 years2nd Molar 23-31 months 11-13 yearsWisdom Tooth - 17-21 years
  • Type of teeth
  • The teeth . . . humans have 8 incisors I 4 canines C 8 premolars P12 molars M abbreviations molar pre molar
  • foods a re good for our te e th
  • 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 dayTry not to eat too many sweets Visit the dentist twice a year
  • References1. 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, Turkey3. www.ischool.zm/media/dentition_in_humans4. www.auburn.edu/academic/classes/zy/../Tooth DevelopmentTxt5. www.users.forthnet.gr/ath/abyss/dep1151.htm :
  • THANK YOU FOR LISTENS