Gujarat Board | Class 9Th | English | Model Question Paper & Solution | Chapter – 2 Dental Health
Gujarat Board | Class 9Th | English | Model Question Paper & Solution | Chapter – 2 Dental Health
PRE-TASK
(A) Know your teeth.
Information about denture.
- Upper-lower jaws
- Same on both the jaws
- Same on both the sides of incisors
- Used for crushing, holding, cutting, grinding, etc.
Now fill in the table.
(B) Here is the picture of a Dental Chair. Observe it closely and discuss with your classmates how it is different from other regular chairs. (Classroom discussion)
COMPREHENSION
1. Complete the table.
| No. | Name of the patient | Kind of dental problem | Dr Bansi Sharma’s suggestion/advice |
| 1. | Sonia | cavity in a premolar tooth | cleaning the cavity and filling it with a white substance |
| 2. | Pooja | broken teeth | consult a dentist for restoration of teeth |
| 3. | Dhara | uneven growth of teeth | consult an orthodontist and fix braces to bring teeth in proper alignment |
2. Write down the ‘Dos’ and ‘Don’ts’ for dental health.
| Dos | Don’ts |
| Brush your teeth twice a day. | Don’t be lazy in brushing your teeth. |
| Brush your teeth in upward and downward movement. | Don’t brush your teeth sideways. |
| Brush the gum-line gently. | Don’t forget to clean your mouth after meals. |
| Clean your mouth after every meal. | Don’t drink anything that is too hot or too cold. |
| Consult a doctor in case of any tooth problem. | Don’t eat too many sweets, chocolates, ice-creams, etc. |
3. Answer the questions.
(1) Why did Ashokbhai take Sonia to Dr Bansi Sharma?
Ans. Ashokbhai took Sonia to Dr Bansi Sharma because she had a severe toothache.
(2) What treatment did Dr Bansi Sharma give to Sonia?
Ans. First, Dr Bansi Sharma gave Sonia some medicines to stop the pain. The next day, he cleaned the cavity and then filled it with a white substance.
(3) What, according to Dr Bansi Sharma, must Sonia do to take care of her teeth?
Ans. According to Dr Bansi Sharma, Sonia must brush her teeth regularly, twice a day. She must clean her mouth after every meal. She must brush her teeth in the right way. She must also brush the gum-line gently.
(4) What happens if we don’t clean our teeth regularly?
Ans. If we don’t clean our teeth regularly, tiny bits of food get stuck in the teeth. Then germs feed on these food particles and also eat up parts of teeth. They destroy the enamel, which leads to cavity.
(5) What is the right way of brushing the teeth, according to Dr Sharma?
Ans. According to Dr Sharma, the right way is to move the brush upwards and downwards. The gum-line should also be brushed with gentle strokes.
(6) How can we prevent cavity in the teeth?
Ans. We can prevent cavity in the teeth by brushing teeth regularly twice a day and cleaning the mouth after every meal.
(7) What is enamel?
Ans. The uppermost white layer of the teeth is called enamel.
(8) How many layers do our teeth have? What are they called?
Ans. Our teeth have three layers. The uppermost white layer is called the enamel. The second yellowish layer is called dentin. The innermost layer is called dental pulp.
(9) What will Sonia learn from her project?
Ans. Sonial will learn about dental hygiene from her project.
WRITING
1. Here is the correct method of brushing teeth. Read it carefully. Now write the instructions for brushing your teeth. Work in pairs.
(1) Holding the brush at 45° angle, brush in short back and forth motions on the outer surfaces of the teeth. Don’t scrub.
Example:
(A) You should hold the brush at 45° angle.
(B) You should move the brush in short back and forth motions on the outer surfaces of the teeth.
(C) You must not scrub.
(2A) Use back and forth motion for chewing surfaces.
Example: You should move the brush back and forth for chewing surfaces.
(2B) Use short-angled strokes along the gum-line.
Example: You should move the brush in short-angled strokes along the gum-line.
(3A) Use gentle up strokes with the of brush.
Example: You should move the brush up with gentle strokes.
(3B) Use gentle down strokes with the brush.
Example: You should move the brush down with gentle strokes.
(4) Brush tongue back to front using sweeping motion.
Example: You should brush the tongue back to front in a sweeping motion.
2. Suppose you are the Dental Chair at the Dental Care Clinic of Dr Bansi Sharma. Write your experiences and feelings during a day.
You can begin like this: Hello. I am the dental chair at Dental Care Clinic of Dr Bansi Sharma. All the patients who come to this clinic are examined and treated only after they sit on me. I have so many different experience and feelings during the day.
Today, the first patient was a small boy. He had a bad toothache. When he sat on me, he was so frightened, that he started screaming and crying. He almost started jumping on poor me! His dirty shoes made me dirty! How angry I was! I was then cleaned by the assistant.
The next patient was an elderly man. He had his tooth removed by the doctor. Though he sat quietly, the treatment was quite painful. The liquid medicines and water fell on me. I became dirty again. But that was okay. understand.
There were many patients throughout the day. I feel happy that I give comfort and rest to the patients. But I also feel sad and angry when I get dirty.
DETAILED COMPREHENSION
A. Read the extracts and answer the questions.
(1) Sonia had a severe toothache. She could neither eat anything nor could she go to school. Studying at home was also impossible due to pain. She was not able to sleep also.
Sonia “Oaa… Maa… it’s unbearable.”
“We must visit a dentist,” said her uncle, Ashokbhai.
1. How did Sonia suffer because of a toothache?
Ans. Sonia could not eat or sleep. She could neither go to school nor study at home.
2. What did Sonia’s uncle say?
Ans. Sonia’s uncle said that they must visit a dentist.
(2) The same evening they were at the Dental Care Clinic of Dr Sharma. Dr Bansi Sharma is a young and competent doctor.
Dr Sharma : Hello, young lady! What’s the matter with you?
Sonia (With difficulty) U ….. maa. Ahh, doctor, I have a terrible toothache.
Dr Sharma: I can see. Let me check it. Sit in the chair, please.
(Sonia sits in the Dentist’s Chair. The doctor switches on the headlight.)
1. Where did Sonia go in the evening?
Ans. In the evening, Sonia went to the dental clinic of Dr Bansi Sharma.
2. What kind of a doctor was Dr Sharma?
Ans. Dr Sharma was a young and competent doctor.
(3) Sonia (Opening her mouth a little bit, slowly) Aaah…! Sorry, doctor. I can’t open my mouth any wider than this.
Dr Sharma: That’s OK. (moving the mouth mirror and the probe in Sonia’s mouth) I can see. I see a black spot on one of your premolars. There seems to be a cavity there.
1. Which instruments did the doctor use to check Sonia’s teeth?
Ans. The doctor used a mouth mirror and a probe to check Sonia’s teeth.
2. What did the doctor see?
Ans. The doctor saw a cavity in a premolar.
(4) Ashokbhai: (Startled) A cavity?
Dr Sharma: Yes, a cavity and quite a big one. I am prescribing some medicines today. The pain will subside by tomorrow. Then only the further treatment is possible. Can you come back tomorrow?
Ashokbhai I will be out of station tomorrow.
Dr Sharma: Well, Sonia can come alone! She is a brave girl.
1. Why did the doctor give medicines to Sonia ?
Ans. The doctor gave medicines to Sonia so that the pain would subside and he could give her further treatment the next day.
2. Why could Sonia come alone?
Ans. Sonia could come alone because she was a brave girl.
(5) (Doctor Sharma cleaned the cavity with an air rotor. Then he filled it with a white substance known as Light-Cured Composite Filling Material. It contains synthetic resin, silica as filler and photo activator, etc.)
Dr Sharma Yes, it’s done. Thank you for keeping your mouth open without speaking a word.
As Sonia was the last patient that day, the doctor could spare time to talk to her.
1. What treatment did the doctor give Sonia?
Ans. The doctor cleaned the cavity with an air rotor and then he filled it with a white substance.
2. Why could the doctor spare time to talk to Sonia?
Ans. The doctor could spare time to talk to Sonia because she was the last patient that day.
(6) Sonia Doctor, would you tell me why I got this cavity?
Dr Sharma : Well, tell me one thing. Are you fond of sweets?
Sonia Yes, I am. I love eating chocolates and ice-creams as well as other sweets.
Dr Sharma: And now tell me one more thing. Do you brush your teeth regularly twice a day? Do you clean your mouth after meals and after eating chocolates or ice- cream?
Sonia No, doctor. I brush my teeth only in the morning.
1. What did Sonia love eating?
Ans. Sonia loved eating chocolates and ice-creams and other sweets.
2. How many times did Sonia brush her teeth?
Ans. Sonia brushed her teeth only in the morning.
(7) Dr Sharma: That’s the problem! You are not taking proper care of your teeth. You must brush your teeth properly twice a day once in the morning and once before you go to bed.
Sonia : What is the right way of brushing the teeth, doctor?
How many times should we brush our teeth?
Ans. We should brush our teeth twice a day in the morning and before going to bed.
(8) Dr Sharma: Most of the people brush their teeth while moving the brush sideways only. But the right way is to move it upwards and downwards so that it removes the tiny bits of food stuck between the teeth. The gum-lines should also be brushed with gentle strokes. Not only this, clean your mouth after every meal and every time you eat a chocolate or an ice-cream.
1. What is the right way of brushing teeth?
Ans. The right way of brushing teeth is to move the brush upwards and downwards so that it removes the tiny bits of food stuck between the teeth.
2. How should brushed? the gum-lines be
Ans. The gum-lines should be brushed with gentle strokes.
3. How often should you clean your mouth?
Ans. We should clean our mouth after every meal and every time we eat a chocolate or an ice-cream.
(9) Dr Sharma: Cleaning of mouth is the first requirement of dental hygiene. If you don’t clean your mouth, tiny bits of food inside stick to the surface of your teeth and in the space between your teeth. Now germs feed on these food-particles that eventually eat up parts of the teeth too! They destroy the enamel coating of the teeth, and in the long run it leads to cavity.
1. What is the first requirement of dental hygiene?
Ans. Cleaning of mouth is the first requirement of dental hygiene.
2. What do the germs feed on?
Ans. The germs feed on the food particles stuck to the surface of the teeth and in the space between the teeth.
3. What do the germs do?
Ans. The germs destroy the enamel coating of the teeth and this leads to cavity.
(10) Sonia Enamel coating? What’s that?
Dr Sharma: For that you need to understand the construction of our teeth. Our teeth have three layers. The uppermost white layer is called enamel. It is the hardest and strongest part of our body. The second layer is called dentin. It is slightly yellowish. The innermost layer is called dental pulp. In your molar, there was a cavity which now no more exists.
1. What is enamel?
Ans. The uppermost white layer of the teeth is called enamel.
2. What is dentin?
Ans. The second layer of the teeth, which is slightly yellowish, is called dentin.
3. What is dental pulp?
Ans. The innermost layer of the teeth is called dental pulp.
4. Which is the hardest and the strongest part of our body?
Ans. The enamel is the hardest and the strongest part of our body.
(11) Sonia Molar? What is it?
Dr Sharma: It’s a kind of teeth. Look at the chart. There are two types of teeth – deciduous teeth, also known as milk teeth, and permanent teeth. Deciduous teeth are usually 20 in number and they shed one by one after growth. Thereafter, new permanent teeth come up. They are usually 32 in number.
1. Name the two types of teeth.
Ans. The two types of teeth are: deciduous or milk teeth and permanent teeth.
2. What is molar?
Ans. Molar is a kind of teeth.
3. What do you know about deciduous teeth?
Ans. Deciduous teeth are usually 20 in number and they shed one by one after growth.
4. How many permanent teeth do we usually have?
Ans. We usually have 32 permanent teeth.
(12) Sonia: Yes, I also have 32 teeth but they all are not same.
Dr Sharma: They are different in shape, size and functions. There are four incisors, two canines, four premolars and four or six molars in each jaw.
1. How many incisors and canines are there in each jaw?
Ans. There are four incisors and two canines in each jaw.
2. How many premolars and molars are there in each jaw?
Ans. There are four premolars and four or six molars in each jaw.
(13) Sonia Pooja, one of my classmates, had slipped off a staircase and she has some fractured teeth. What should she do?
Dr Sharma: Well, she needs to consult a dentist. After examining her teeth, the dentist will suggest restoration of teeth with Light-Cured Composite Filling Material.
1. How did Pooja break her teeth?
Ans. Pooja slipped off the staircase and broke her teeth.
2. Whom should Pooja consult?
Ans. Pooja should consult a dentist.
3. What will the dentist suggest to Pooja?
Ans. The dentist will suggest restoration of teeth with Light-Cured Composite Filling Material.
(14) Sonia: OK. I have another friend named Dhara. She has an uneven growth of teeth. Her teeth are not properly grown. She feels very embarrassed at times. Any advice for her?
Dr Sharma: No one should feel embarrassed about physical deformity. Her problem is called crowding. Now, there is a solution for this problem also. The patient has to go for an orthodontic treatment. The braces will bring her teeth in proper alignment.
1. Why does Dhara feel embarrassed?
Ans. Dhara feels embarrassed because she has an uneven growth of teeth.
2. What is the solution to uneven growth of teeth?
Ans. Uneven growth of teeth can be corrected by orthodontic treatment, in which braces are fixed on teeth to bring them in proper alignment.
3. What is crowding?
Ans. Uneven growth of teeth is called crowding.
(15) Sonia Thank you very much for your valuable suggestions. Indeed dental science has advanced a lot. I will ask her to consult an orthodontist. Hmmm. Now I am thinking of taking up a project on Dental Health because we have to work on a project in science and I think this is a very useful topic.
Which project does Sonia want to take up?
Ans. Sonia wants to take up a project on dental health.
B. Use the set of words in your own sentences.
(1) severe – prescribe
Ans. Nitin had a severe pain in the leg and So the doctor has prescribed some medicines.
(2) impossible – destroy
Ans. The king found it impossible to destroy the enemy.
(3) unbearable – dentist
Ans. Anand had an unbearable toothache and so he visited his dentist.
(4) competent – valuable
Ans. Mr Verma is a competent officer and his suggestions are very valuable for the staff.
(5) terrible- subside
Ans. Hemant has a terrible headache, which will subside only if he takes some medicine.
(6) reason – consult
Ans. Do you know the reason why Jatin is consulting a lawyer?
(7) requirement – hygiene
Ans. Brushing teeth twice a day is the first requirement of dental hygiene.
(8) possible – restoration
Ans. The restoration of this old fort is possible only if the government gives enough funds.
(9) eventually – examine
Ans. Eventually, the striking teachers were ready to examine the answer sheets of the students.
(10) exist-wide
Ans. There exists a wide gap between the rich and the poor.
(11) solution – permanent
Ans. There seems to be no permanent solution to the traffic problem in cities.
(12) embarrassed – slipped off
Ans. Jay was embarrassed when he slipped off his scooter and fell down.
(13) to spare – advice
Ans. Though the principal was busy, he decided to spare some time to give advice to the students of class 10.
(14) regularly – in the long run
Ans. If you exercise regularly, it will certainly benefit you in the long run.
(15) suggest – fond of
Ans. Since Neha is fond of music, I suggested her to learn to play a musical instrument.
C. Write who said to whom the following sentences.
(1) We must visit a dentist.
Ans. This sentence was said by Ashokbhai to Sonia.
(2) Hello, young lady! What’s the matter with you?
Ans. This was said by Dr Sharma to Sonia.
(3) I am prescribing some medicines today.
Ans. This sentence was said by Dr Sharma to Ashokbhai.
(4) Would you tell me why I got this cavity ?
Ans. This was said by Sonia to Dr Sharma.
(5) I brush my teeth only in the morning.
Ans. This sentence was said by Sonia to Dr Sharma.
(6) You must brush your teeth properly twice a day – Once in the morning and once before you go to bed.
Ans. This sentence was said by Dr Sharma to Sonia.
(7) What is the right way of brushing the teeth, doctor?
Ans. This was said by Sonia to Dr Sharma.
(8) Cleaning of mouth is the first requirement of dental hygiene.
Ans. This sentence was said by Dr Sharma to Sonia.
(9) Enamel coating? What’s that?
Ans. This was said by Sonia to Dr Sharma.
(10) No one should feel embarrassed about physical deformity.
Ans. This sentence was said by Dr Sharma to Sonia.
(11) Now I am thinking of taking up a project on Dental Health.
Ans. This sentence was said by Sonia to Dr Sharma.
(12) Well, Sonia can come alone! She is a brave girl.
Ans. This sentence was said by Dr Sharma to Ashokbhai.
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