The Dentist. a Popular Treatise on the Care of the Teeth baixar o livro de graça

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: one, gold would unhesitatingly be the choice. Its appearance is not very objectionable even when very much exposed. Its durability is, of course, beyond question; and its wearing qualities are so good that it never wears out. Its working qualities are such that it is possible to use it in every case, though often with exceeding difficulty, and consequent liability of imperfection. Gold operations being more tedious and expensive, are about the only objections which can be brought against it. No person should delay, much less refuse, to have the teeth filled because they cannot afford to have them filled with gold. It would be as unreasonable as to refuse to wear a coat or dress simply because we cannot have just the kind we want. The teeth may be as surely preserved with other kinds of filling. There are as many failures with gold as with any other material. It requires the highest degree of skill to use it successfully. A poor gold filling is poor indeed. The dentist has a great variety of preparations of gold for filling teeth, and a considerable variety of methods of manipulating it; all of which is of interest to the patient, but scarcely within the comprehension of any one without considerable explanation and study. Amalgam. We have many preparations under this head. They are composed of a greater or less number of metals, combined in such proportions as to secure certain desirable qualities: such as not to oxydize; not to shrink or expand; to set or harden in a convenient time; and tough enoughnot to crumble, and hard enough not to wear away by use. This filling is valuable for the ease to the patient with which it can be put in place, and also for its durability. In general it can be kept bright, so that it is not unsightly, though it is not recommended for a f...