The The TeethTeeth

© PDST Home Economics

Healthy Teeth & GumsHealthy Teeth & Gums

Help us to digest foodHelp us to digest food Make us look betterMake us look better Good health – bad teeth Good health – bad teeth

cause bad breath, cause bad breath, abscesses, stomach upsetabscesses, stomach upset

Help us speak clearlyHelp us speak clearly

Sets of TeethSets of Teeth

Primary Teeth aka milk, temporary.Primary Teeth aka milk, temporary. 20 teeth20 teeth 0 to 7 yrs0 to 7 yrs Permanent TeethPermanent Teeth 32 teeth32 teeth 8yrs to death8yrs to death

Types and Types and functions functions of teethof teeth

TypesTypes NumberNumber FunctionFunction

IncisorIncisor 88 Cut & biteCut & bite

CanineCanine 44 TearTear

PremolarPremolar 88 Chew & grindChew & grind

MolarMolar 1212 Chew & grindChew & grind

Structure of the ToothStructure of the Tooth

StructureStructure

2 main part (a) crown, (b) root2 main part (a) crown, (b) root Mostly made of dentine which is like boneMostly made of dentine which is like bone The crown is covered in enamel, the hardest The crown is covered in enamel, the hardest

substance in the body.substance in the body. The root is covered in cement which sticks The root is covered in cement which sticks

the tooth in the gum and bonethe tooth in the gum and bone In the centre of the dentine is a space called In the centre of the dentine is a space called

the pulp cavity, blood vessels and nerves are the pulp cavity, blood vessels and nerves are found herefound here

Dental HealthDental Health 2 main dental health problems are (a) tooth 2 main dental health problems are (a) tooth

decay and (b) gum disease.decay and (b) gum disease. Both are caused by plaque, a mixture of food Both are caused by plaque, a mixture of food

saliva and bacteria that build up on the saliva and bacteria that build up on the teeth.teeth.

Tooth decay: Bacteria react with food Tooth decay: Bacteria react with food forming acid which burns into the tooth forming acid which burns into the tooth causing a cavity, when the decay reaches the causing a cavity, when the decay reaches the nerve pain is felt.nerve pain is felt.

Gum diseaseGum disease

Dental decayDental decay

Care of teethCare of teeth

Brush twice a day at least using fluoride Brush twice a day at least using fluoride toothpastetoothpaste

Floss at night to avoid gum diseaseFloss at night to avoid gum disease Replace toothbrush regularlyReplace toothbrush regularly Visit dentist every 6 monthsVisit dentist every 6 months Avoid sugary foodsAvoid sugary foods Eat calcium and Vit D rich foodsEat calcium and Vit D rich foods

FluorideFluoride

Mineral element that makes tooth enamel Mineral element that makes tooth enamel stronger and prevents decay.stronger and prevents decay.

Added to our water supply, toothpaste and Added to our water supply, toothpaste and mouth washmouth wash