This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...paste. Amalgam in its pasty condition, before it sets, is similar in consistency to a mixture of sand and water, so if it is merely pushed into position the larger particles will jamb on each other and large unfilled spaces will result. But if, like the porcelain paste, the filling is tapped and jostled, the large ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...paste. Amalgam in its pasty condition, before it sets, is similar in consistency to a mixture of sand and water, so if it is merely pushed into position the larger particles will jamb on each other and large unfilled spaces will result. But if, like the porcelain paste, the filling is tapped and jostled, the large particles will float in the liquid mercury and come in closer approximation, while the mercury will rise to the surface, as the water rises to the surface of the porcelain dough when it is similarly jarred for the purpose of condensation. When the last tamping has been accomplished, and enough of the wafer added to ensure perfect contours and edges, sponge gold, slightly warmed to drive off any free moisture, should be pressed upon the surface of the filling until it sticks. The patient is then dismissed. If the gold adheres until he returns it can be polished off; if it does not adhere, it means that there was no excess mercury. In either case the result is a dense filling inserted quickly and painlessly. It is a source of wonder that many dentists still work amalgam in the dry state, when equal if not better results are obtained by using it as a plastic. The author is aware that the use of a piece of sponge gold that costs from twenty-five cents to a dollar, for the hardening of an amalgam filling, will seem a monstrous extravagance to many dentists who would rather work half an hour or even an hour longer to avoid such "wilful waste," even though they are working over a sensitive, suffering patient. Amalgam as a Cement.--When an anchorage for a bridge is to be made in an amalgam filling, the pin or gold inlay should be inserted into the mushy amalgam that has been placed in the cavity. The pin or inlay should then be tapped into posit...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
