New powder whitens, repairs and protects teeth

 White teeth are widely revered in many countries. Hollywood, advertising, and social media have helped to make ultra-white teeth a must-have, and even an obsession. For decades, people have used peroxide-based chemical whiteners in an attempt to get a perfect set of "pearly whites". However, these chemicals can damage the teeth and gums. Help is now at hand for those of us who have stained or off-white teeth. Researchers in China say they have created an effective teeth-whitening ceramic powder. Researcher Min Xing said it is "a safe, at-home teeth-whitening strategy integrating whitening, enamel repair, and microbiome balance for long-term oral health".


The researchers wrote about how their new powder works. It is activated by electric toothbrush vibrations, which create a small electric field over the teeth. This causes a reaction known as "reactive oxygen species". These are compounds that break down stain-causing molecules. The researchers said their laboratory trials were very promising. They tested human teeth that were artificially discoloured with tea and coffee. After four hours of brushing, there was visible whitening. After 12 hours of cleaning, the teeth were 50 per cent whiter than those brushed with saline. The researchers said the next step is to incorporate the powder into a  toothpaste formula.

 

1.Vocabulary

    Paragraph 1

      1.

revered

a.

The two soft parts of the mouth that holds the teeth.

      2.

ultra

b.

The hard white outside of a tooth.

      3.

obsession

c.

Very respected and loved.

      4.

gums

d.

Thinking about one thing all the time.

      5.

at hand

e.

Very strong or very extreme.

      6.

integrating

f.

Near or ready to use.

      7.

enamel

g.

Putting things together.

    Paragraph 2

 

      8.

activated

h.

Small, fast movements.

      9.

vibrations

i.

Things made from two or more parts.

      10.

compounds

j.

Water with salt in it.

      11.

molecules

k.

Started or turned on.

      12.

artificially

l.

To add and mix in.

      13.

saline

m.

Made by people, not natural.

      14.

incorporate

n.

Very small parts that make everything.

 

2. SYNONYM MATCH: Match the following synonyms from the article.

  1. revered
  2. obsession
  3. attempt
  4. at hand
  5. integrating
  6. activated
  7. compounds
  8. promising
  9. visible
  10. step
  1. started
  2. closeI 
  3. encouraging
  4. combining
  5. cherished
  6. amalgams
  7. noticeable
  8. fixation
  9. course of action
  10. effort

3.Top 10 Things About Our Health That People Neglect

  • Do you take care of these?
  • Which do people neglect the most?
  • For each one, tell us why it is important and why do many people tend to ignore it and what could be the consequences: 

Health Areas

  1. Sleep
  2. Hydration
  3. Mental health
  4. Posture
  5. Sun protection
  6. Dental hygiene
  7. Physical activity
  8. Nutrition balance
  9. Stress management
  10. Eye health

 4. Scenario

You are talking to a close friend (or classmate) who is unsure about their future career. They are considering several options (medicine, business, IT, arts, etc.), but you strongly believe that becoming a dentist is the best choice.

Your task is to persuade them to become a dentist by using strong arguments, selling points, and real-life benefits


5. Discuss: 

Top 5 Things About Being a Dentist

  1. High income potential
  2. Job stability and demand
  3. Good work-life balance
  4. Positive impact on confidence and health
  5. Career flexibility and independence

👎 Top 5 Bad Things About Being a Dentist

  1. Long and expensive training
  2. Stress and pressure
  3. Physically demanding work
  4. Unpleasant working conditions
  5. Patient anxiety and communication stress

6.Role play

Role  A – First Impressions
You think the perfect smile is most important for first impressions. Tell the others three reasons why. Tell them what is wrong with their things. Also, tell the others which is the least important of these (and why): confidence, job interviews or signalling good health.

Role  B – Confidence
You think the perfect smile is most important for confidence. Tell the others three reasons why. Tell them what is wrong with their things. Also, tell the others which is the least important of these (and why): first impressions, job interviews or signalling good health.

Role  C – Job Interviews
You think the perfect smile is most important for job interviews. Tell the others three reasons why. Tell them what is wrong with their things. Also, tell the others which is the least important of these (and why): confidence, first impressions or signalling good health.

Role  D – Signalling Good Health
You think the perfect smile is most important for signalling good health. Tell the others three reasons why. Tell them what is wrong with their things. Also, tell the others which is the least important of these (and why): confidence, job interviews or first impressions.

7.Discussion - White Teeth


  1. What do you think of having white teeth?
  2. What do you think of having straight teeth?
  3. Why are white teeth so revered?
  4. Can teeth be too white?
  5. Would you use teeth-whitening chemicals?
  6. What do you do to look after your teeth?
  7. What do you think of going to the dentist?
  1. Is an electric or regular toothbrush best?
  2. What can we eat that is good for our teeth?
  3. What do we eat that is bad for our teeth?
  4. What's your favourite  toothpaste, and why?
  5. Will you be using the new teeth-whitening powder?
  6. What do you think when you see a perfect smile?
  7. What questions would you like to ask a dentist?

 

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