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86 5. Dental …, also known as tooth whitening, is a common procedure in general dentistry. 6. Dentists use different materials to … cavities. 7. Sometimes dentists recommend that wisdom teeth should be …. 8. What is the most common … of pulpitis? 9. A periodontist is a specialist who specializes in the diagnosis, … and prevention of periodontal diseases. 10. A… is a fxed dental prosthesis. 7. Memorize the following collocations. Make sentences with some of them. • to fll a cavity • to date back to … • to extract a tooth • to relieve pain • to perform an operation • to play an important role • to make a discovery • to practice dentistry • to have toothache • general anaesthesia • oral hygiene • false teeth • tooth decay • a major source of … Reading 1 8. Read the following questions on the history of dentistry. How many of them can you answer? Questions Text A 1. What information on teeth can we find i ancient Egyptian medical texts? 2. Who was the earliest known dentist? 3. What was the cause of dental caries and pain, according to Sumerians? 4. What kind of dental procedures could the Etruscans perform? 5. How did the Romans take care of their teeth? 6. What did the Chinese invent in the fild of dentistry? Text B 1. Who practiced dentistry in Europe in the Middle Ages? 2. Who is called «the father of dentistry»? Why? 3. Where and when was the frst dental school opened? 4. Who was the frst to use anaesthesia in dentistry? 5. What discovery did Miller make? Why was it important? 6. How did the invention of X‑ray help dentists?