30. In the cut, at the head of this article, is represented a dentist, about to extract a tooth for a lady, who may be supposed to be in a state of alarm at the sight of the instruments; but he, having thrown his right hand, which holds them, behind him, shows the other containing nothing, with the view of allaying her fears. The manner in which teeth are extracted, needs no description, since it is an every-day operation in all parts of the world.
31. One of the chief sources of income to this profession, is the insertion of artificial teeth; for, although few are willing to expend much to prevent the loss of their teeth, many will incur great expense in supplying the deficiencies, after they have occurred. So perfectly and neatly is this operation performed, by some dentists, that it is difficult to distinguish between teeth which are natural, and those which are artificial.
32. The materials for artificial teeth were formerly found chiefly in the teeth and tusks of the hippopotamus, and in the teeth of some domestic animals; but, within a few years, a mineral composition, called porcelain, has come into great repute, since it is very beautiful, and is entirely proof against the most powerful acids.
33. Surgical operations upon the teeth were performed in ancient Greece and Rome, many of which were similar to those of the present day. The extraction of teeth must have been practised at a period of antiquity to which the records of medicine do not reach. The operation is recommended by Hippocrates, who describes many of the diseases to which the teeth are liable. He also mentions the practice of fixing the teeth by means of gold wire, and gives several formulas for making dentrifices.
34. Celsus, a Roman writer on medicine, who flourished about the beginning of the Christian era, seems to have been the first author who described the method of extracting teeth, and the first who notices the removal of tartar by means of cutting instruments, as well as filling carious teeth with lead and other substances, with the view of preventing further decay. Soon after this period, false teeth, of bone and ivory, were introduced. Actius, a writer of the fourth century, is the first who mentions the operation of filing the teeth.
35. The return of barbarism to Europe, nearly extinguished the knowledge of dentistry. As a branch of surgery, however, it was revived by the Arabian writer, Albucasis, in the tenth century; but, for many hundred years after this period, it received but little attention from men of science, the operations of surgery being confined chiefly to the barbers.
36. The first modern work on the diseases of the teeth was published at Lyons, in 1581. This was followed by many other publications on the same subject, in the succeeding century. In the year 1700, it began to be required in France, that all persons who intended to practise dentistry in that country, should undergo an examination, to test their qualifications. From this period is dated the establishment of the dental art as a distinct branch of medical practice.