5. Teeth – growth
1. Find synonyms for the following words:
baby teeth _________
become visible_________
progress _________
long-lasting _________
Deciduous teeth, otherwise known as, more commonly primary teeth, are the first set of teeth in the
growth development of humans and other mammals. They develop during the embryonic stage of
development and erupt during infancy. They are usually lost and replaced by permanent teeth, but in
the absence of permanent replacements, they can remain functional for many years.
denture_________
eruption of first teeth _________
lower jaw _________
The development of primary teeth starts at the sixth week of tooth development. By the time the
embryo is eight weeks old, there are ten buds on the upper and lower arches. These teeth will continue
to form until they erupt in the mouth. In the primary dentition there are a total of twenty teeth: five per
quadrant and ten per arch. Teething begins at the age of six months and continues until twenty-five to
thirty-three months of age. Usually, the first teeth seen in the mouth are the mandibular centrals and
the last are the maxillary second molars.
show up_________
absorbtion _________
The primary dentition is made up of central incisors, lateral incisors, canines, first molars,
and secondary molars; there is one in each quadrant, making a total of four of each tooth. The
replacement of primary teeth begins around age six, when the permanent teeth start to appear in the
mouth, resulting in mixed dentition. The erupting permanent teeth cause root resorption, where the
permanent teeth push on the roots of the primary teeth, causing the roots to be dissolved by
odontoclasts and become absorbed by the forming permanent teeth. By age twelve there usually are
only permanent teeth remaining.
2. Label the diagram showing baby teeth.
3. Complete the missing parts of the text with the verbs from the box.
grasp
cut
shovel
chew
tear
grind
crush
The incisors are built to 1.………..food and 2.………… it inwards. They are the sharpest teeth. The
role of the canine teeth is to 3.…..... and 4.……….. the food. Therefore they have very long roots. The
premolars have a flat surface so they are able to 5.…….…the food and the molars which are much
bigger than premolars and have a flatter surface 6………. and 7……….. it into small pieces.
The adult teeth
When all permanent teeth erupt they are 32 all together – 16 on the top and 16 on the bottom. 20 have
replaced the baby teeth, and the other 12 are new molars. They are large and their role is to do
chewing. The first molars we get are called 6-year molars. The second molars come in when we are
about 12 years old, so they are called 12-year molars. The third molars are referred to as the wisdom
teeth.
4. Read the description of the individual teeth. Then complete the diagram below.
Centrals: the two upper and two lower teeth in the centre of the mouth.
Laterals: the teeth next to the centrals.
Cuspids: the pointy teeth behind the laterals. They have one cuspal (point).
First Bicuspids: the teeth just behind the cuspids. These teeth have two cuspals.
Second Bicuspids: the teeth behind the first bicuspids. They also have two cuspals.
First Molars: the teeth just behind the second bicuspids. They have a flat surface with four cuspals.
Second Molars: they are the next teeth in the upper and lower row. They also have a flat surface with
four points.
Third Molars: the last teeth in the row and look the same as the second molars.
Grammar – future tense - will / to be going to / present continuous
Will
- spontaneous decision
- offer
- promise
Going to - decision made for the future
I’ll go with you.
I will help you
I’ll always love.
When I finish uni, I’m going to travel.
Present continuous - already arranged activity I’m having dinner with my mum tonight.
1. Circle the correct form. In some cases both sentence are possible.
1.
2.
3.
4.
5.
6.
7.
8.
9.
I’m going to study / I’ll study English here next year.
A. Shall we / Will we eat out tonight?
B. Good idea.
We’ll go / We’re going to Brazil next week. I can’t wait.
What are you going to wear / are you wearing to the party?
Do you think it will rain / it’s going to rain tomorrow.
A. This is heavy.
B. I’ll help / I help you.
I’m meeting / meet a friend this evening
I’m really sorry, I promise I won’t do / I’m not going to do it again.
They’re getting / They’re going to get married in May.
2. Complete B’s replies with a correct future form.
A. Sorry, Ann’s not in.
B. OK. I’ll call back later. (call back)
1. A. There’s no milk.
2. A. Can we meet on Tuesday?
3. A. Can we have pizza for lunch?
B. Don’t worry, I _____________ some. (get).
B. Sorry, I can’t. I _____________ to Brighton. (go)
B. No, we ____________ chicken. I’ve already put it in oven.
(have)
B. Yes, but don’t get up. I _____________ it. (answer)
B. She’s pregnant. She _____________ a baby in May. (have)
4. A. Is that the phone?
5. A. Jane’s put on a lot of weight!
Teacher’s notes / keys:
1. Baby teeth _deciuous_ become visible_erupt_ progress _development_ longlasting_permanent_ Denture____dentition____ eruption of first teeth ___teething___ lower jaw
__mandibular___
show up___appear_____ absorbtion ___resorption___
2.
3. 1.grasp 2.shovel 3.tear 4. Cut 5. grind 6.chew 7.crush
4.
Grammar
1.
1.
2.
3.
4.
5.
6.
7.
8.
9.
I’m going to study English here next year.
A. Shall we eat out tonight? B. Good idea.
We’re going to Brazil next week. I can’t wait.
What are you going to wear / are you wearing to the party?
Do you think it will rain / it’s going to rain tomorrow.
A. This is heavy.
B. I’ll help you.
I’m meeting a friend this evening
I’m really sorry, I promise I won’t do it again.
They’re getting / They’re going to get married in May.
A. Sorry, Ann’s not in.
2.
1. A. There’s no milk.
2. A. Can we meet on Tuesday?
3. A. Can we have pizza for lunch?
4. A. Is that the phone?
5. A. Jane’s put on a lot of weight!
B. OK. I’ll call back later. (call back)
B. Don’t worry, I’ll get some.
B. Sorry, I can’t. I am going to Brighton.
B. No, we are going to have chicken. I’ve already put it in.
oven
B. Yes, but don’t get up. I’ll answer it.
B. She’s pregnant. She is having a baby in May.
Articles:
-
Your teeth from birth to adulthood - hhttp://www.webmd.com/oral-health/guide/teethbirth-adulthood
Baby teeth eruption chart - http://www.essentialbaby.com.au/baby/baby-stages-ofdevelopment/baby-teeth-eruption-chart-20120917-261k2.html
Video:
-
Video for kids teeth development growth pattern fun cartoon – 9min http://www.youtube.com/watch?v=7MN-sDwPihE
Eruption of teeth – 6min - http://www.youtube.com/watch?v=ZdglZymoIyQ
Watch your teeth come in – 0,30min www.youtube.com/watch?v=0KjsYgieot8&list=PLpw4jZKnSjDoP8c3RAqnZIVwL6VaNYV
3b
Other links:
-
Tooth fairy http://www.salon.com/2014/02/09/dont_tell_the_kids_the_real_history_of_the_tooth_fairy/
Grammar
- http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-6874.php
- http://www.agendaweb.org/verbs/future-simple-will-be-going-to.html
Zdroje:
-
Wikipedia. Decidious teeth. [online].(c)2014 [cit. 201-13-10]. Dostupné na www:
<http://en.wikipedia.org/wiki/Deciduous_teeth>.
-
Elsevierimages. [online].(c)2005 - 2010 [cit. 201-12-10]. Dostupné na www:
<http://www.elsevierimages.com/image/35682.htmm>.
-
Studio Dentaire. Primary teet. [online].(c)2012 [cit. 201-11-10]. Dostupné na www:
<http://www.studiodentaire.com/en/glossary/primary_teeth.php>.