1. Many important problems (to discuss) at the conference.
2. The (to recommend) him to use a soft toothbrush.
3. The patient (to give) the injection of anesthetic.
4. The third or last molar (to call) the wisdom tooth.
5. The carious tooth (to become) the starting point of infection.
6. The tooth (to extract) painlessly.
7. The pain (to disappear) after the proper treatment.
VIII. Read and translate the text using a dictionary.
Text B. Teeth and Gums
Six months or so after birth the first deciduous teeth erupt through the gums. A normal child will eventually have twenty baby teeth, ten teeth on each jaw. The deciduous teeth are lost when the permanent ones are ready to emerge. Both sets of teeth are usually present in the gums at birth or shortly afterwards, with the permanent teeth lying under the deciduous ones. By the time the permanent tooth is ready to erupt, the root of the deciduous tooth above it has been completely resorbed by osteoclasts, the six permanent molars in each jaw have no deciduous predecessors. the shedding of deciduous teeth and the appearance of permanent ones follow a fairy consistent pattern. The teeth are held in their sockets by bundles of connective tissue called periodontal ligaments.
IX. Read the text and find Russian equivalents to the underlined phrases. Learn these phrases. Translate the text.
Text C
Teeth bite, chew and grind. If you like to eat chocolate, candies and cakes you have a sweet tooth. Teeth are useful for eating and talking and they can also look attractive if they are well-kept. But in the English language they often indicate difficulty or aggression.
Dogs bare their teeth when they want to fight. If a person talks through histeeth or just shows his teeth its better to get out of his way quickly. He may be armed to the teeth. If you dont you may fight tooth and nail to defend yourself. If you cant bite, never show your teeth! if you are not good at fighting your teethmay start chattering with fear. Peoples teeth chatter when they are very cold and frightened or when they have fever.
If you get teeth into something it doesnt mean that you are feeling dangerous or aggressive. It simply means that you are doing something that involves concentration or effort. You may get your teeth into a good book and it means you want to read it, not to eat it!
X. Answer the questions to the text.
1. What can teeth do?
Lesson 4
: , Perfect (), to have
Eruption of Teeth
I. Read the following words and word combinations and give their Russian equivalents:
permanent [pWmqnqnt], line [lQin], embryonic [,embriOnik], infant [infqnt], regular [regjulq], primary [prQimqri], extremely [ikstrJmli], correct [kqrekt], type [tQip], morphology [mOfOlqGi], differentiate [,difqrenSieit], associated [qsouSieit]
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II. Learn the following words:
tooth bud -
to influence [influqns] -
crowded [krQudid]
to chew [CH] -
proper [prOpq] - ,
occlusion [qklHZqn] -
malocclusion -
jaw [GL] -
faulty bite [fLlti] -
to fall out [fLl] (fell, fallen) -
root -
to dissolve [dizOlv] -
to grind - ,
burden [bWdqn] - ,
wisdom tooth [wizdqm] -
to delay [dilei] -
crooked [krukid] - ,
impacted - ( )
to resemble [rizembl] - ,
to shred -
III. Read the words, define the part of speech and translate them:
deciduous, unnatural, embryonic, crowded, properly, occlusion, important, completely, irregular, dissolved, extremely, development, eruption, permanent, mainly, differentiate
IV. Combine the words in A with those in B:
A. to fall, faulty, gum, to come, before, tooth, dissolved, embryonic, third, unnatural, dental, deciduous, wisdom, adult, mouth
B. bite, bud, out, life, birth, shape, in, arch, dentition, line, root, tooth, teeth, molar, position
