Transactions of the Odontological Society of PennsylvaniaThe Society, 1884 |
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Términos y frases comunes
abscess acid adapted alloy alveolar alveolar ridge amalgam filling approximal surfaces arsenic ARTICLE artificial crowns artificial teeth BONWILL buccal capillary tube caries cause cavity cementum cervical condition contour corundum cupel Daniel Neall decay dental dental caries dental engine dentine dentist dentistry dentos dentures devitalized discoloration Dixon edges enamel ESSIG experience failure fibers of living fluids gold fillings gold foil grinding surface gutta-percha heat held Saturday impression incisor inserted living matter mallet manipulation mastication mechanical meeting was held mercury metal method milligrammes molars mouth natural nutrition observed office of Dr operations ounces oxide oxychloride pain patient perfect plaster plastic plate platina platinum portion practice present pressure profession proper protoplasmic pulp regular meeting remain removed root rubber silver soft soldered teeth tion tissue tooth tooth-structure walls Webb wire zinc
Pasajes populares
Página 208 - Resolved, That a copy of the foregoing be transmitted to the family of the deceased."* Dr.
Página 150 - For example, the vital energies of our bodies are derived from the food we eat, the water we drink, and the air we breathe ; they therefore existed first under the form of chemical affinities.
Página 138 - My impression is, this combination of metals forms a galvano-plastic which decomposes irritating acids, which would otherwise attack the lime salts. A primary battery of acids attached to a secondary one of metals, will deplete itself in charging the latter, and then will, in part, flow back until drawn off and used by interruption; and this flow continues back and forth each time, becoming less and less, until the current (for it is a current, and not undefined,) ceases, and there is an equilibrium...
Página 6 - ... decomposition of tooth-substance and formation of gas under the loosened plug, the driving down and accumulation of food underneath, or some similar cause." It is evident that an amalgam liable to contract or expand to a marked extent is not to be relied upon as a filling-material. Discoloration of dental amalgams depends largely upon the formation of sulphides. The fluids of the mouth, in every case where the most scrupulous cleanliness is not observed...
Página 102 - ... types, expressing the law of gradual change and progress in the human soul itself. What the difference is in mere beauty between a gradated and ungradated...
Página 209 - Resolved, That we tender to his family our heartfelt sympathy, and that a copy of these resolutions be forwarded to them as a token of our condolence.
Página 170 - In the re-cut bur (Fig. 3) you will notice its similarity to the new plain bur so far as roughness from scale is concerned. Its teeth, however, are of unequal length, caused by some of them having been previously broken and their being filed to an edge in their present shape. This fact makes it -one degree worse than the ordinary bur as a pain-producer. Next, I would call your attention to the worn bur (Fig. 4...
Página 50 - ... traverse the basis-substance within its light net-work, at the same time uniting dentinal fibers directly, and sending slender conical offshoots into the light net-work of the basissubstance. (See Fig. 262.) The dentinal fibers are either in direct connection with coarser offshoots of the bioplasson bodies of the cementum, or the light net-work of the basissubstance of the dentine is in communication with that of the basis-substance of the cementum.
Página 12 - ... found susceptible of being turned in the lathe with facility. The tendency on the part of metals to unite in definite proportions may be studied in connection with platinum, iridium, gold, rhodium, ruthenium, and silver, when fused with tin. If the latter metal is in excess after cooling, a metallic ingot is obtained resembling closely the original substance; but by the action of strong hydrochloric acid the excess of tin may be dissolved, leaving crystals of a definite alloy of the tin and the...
Página 170 - ... utter worthlessness as a cuttingtool. Some of the teeth are broken, while others are worn down so as to more closely resemble a burnisher than a cutting-tool. These worn and smooth edges, together with the irregularity of the teeth, make it an instrument that, by heating and thumping the tooth, would cause more pain and do less work than any other.