​Lesson Objectives

Students should be able to:

1. ​State the importance of teeth in digestion

2. ​Identify the two sets of teeth

3. ​Identify the types of teeth present in infant and adult human

4. ​Relate the types teeth to they functions

Recap ​

​What is digestion?

Digestion is the breakdown of food substances into smaller parts.

​

​

​Types of digestion

There are two types of digestion:

​1. Mechanical

​physical breakdown by the crushing of teeth or the churning of muscles

​Types of digestion

​2. Chemical

​breakdown of chemicals in food assisted by enzymes

​The importance of teeth in digestion

​Teeth breaks down food mechanically into smaller pieces.

​

​This increases the surface area available for enzymes to act

​

​

​

​

​Sets of teeth

​Milk dentition

​-first set of teeth

​-also known as temporary or baby teeth

​-20 teeth in total

​-true molars not present

​-hard foods are not suitable

​Sets of teeth

​Permanent set

• ​has both molars and premolars

  • ​molars start erupting ~6-7 years

• ​ more teeth available (32 teeth)

​

​Types of teeth

​TOTAL

8 incisors

​4 canines

​8 pre molars

​12 molars

​Question

​Granny is missing her canine and molar tooth how does that affect her ability to eat?