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INDEX. 391

Enamel hatchets, definition, 20. Finish of enamel wall, in cavity prepara-
forms and uses, 41, 42. tion, 100, 115.
sharpening, 36. for gold inlays, 335.
Enamel margins, nomenclaturo of, 14. for porcelain inlays, 335, 340.
Engine, dental, use of, 44. in gingival third cavity in buccal sur-
Enlarging root canals with drill, 48. face of molar, 202.
Essential oils, see Oils. in labial surface of incisor, 209.
Excavation of cavities, see Cavity prep- in large pit cavity in upper first
aration. molar, 127.
Excavators, see Instruments, cutting. in mesial cavity in upper central in-
Expansion and contraction of test amal- cisor, 183.
gam fillings, note re, 311. in mesio-occlusal cavity in lower seconil
Exposure of dental pulp, see Pulp. molar, 168.
Extension for prevention, see Caries, den- in upper first molar, 15."?, 162.
tal, in small pit cavitv in upper first molar,
a definite requirement, 142. 123.
case illustrating meaning of, 143. when walls approach crests of mar-
cavities in incisors representing mini- ginal ridges, 136.
mum and maximum, 185. Finishing files, for gold fillings, 294.
conditions upon which extensions sharpening same, 37.
should be based, 109. Finishing knives, for gold fillings, 294.
cutting, with bur, 46. Finishing gold fillings, see Gold fillings,
effect of wide separation on width of finishing.
extensions to buccal and lingual, First grasp in applying rubber dam, 73,
166. 75.
in gingival third cavities, 109, 202. Fissure bur, uses of, 45.
in proximal cavities in incisors and Fissure cavities, see Pit and fissure cavi-
cuspids, 189. ties.
limited by extent of separation of the Flagg, J. Poster, re amalgam, 303.
teeth, 144. Fletcher, Thomas, re amalgam, 301.
what it does not mean, 145. Foil, gold, 227.
what it means, 142. Food, force used in chewing, 245.
Extensions of caries gingivally, 146. Fool 's knot, 88.
detection of while operating, 147. Foot pluggers, special uses of, 254, 256.
Face of pluggers, definition, 18. Force, application of, in filling with co-
Falling weight apparatus, for measuring hesive gold, 251.
force of blows, 239. different plans of applying, 251.
limit to force that can be applied, 253.
Fifth grasp in applying rubber dam, 73,
78. relation of size of plugger points to,
Files in finishing gold fillings, 294. 253.
sharpening same, 37. table showing force required to con-
Filling cavities with amalgam, see Amal- dense gold with pluggers of dif-
gam, ferent sizes, 242.
cement, see Cement, Force used in chewing food, 245.
cohesive gold, see Gold, Forms of cutting instruments, studies of,
gutta-percha, see Gutta-percha, 38.
non-cohesive gold, see Gold. Forms of plugger points, 253.
Filling materials, physical properties of, Formula for amalgam alloy, no fixed,
224. good for general use, 310.
amalgam, see Amalgam, Formula names of instruments, 22.
cement, 355. of plugger points, 254.
desirable qualities, 224. Formulas of cutting instruments, studies
gold, see Gold, of, 38.
tin, 224. Fourth grasp in applying the rubber
Fillings, solidity and strength required dam, 73, 77.
of, different for different persons, Furnaces for inlay work, 350.
253. General susceptibility and immunity to
strength required in, 245. dental caries, 110.
Final word re amalgam, 329. Gingival extensions of proximal decays,
Finger positions, 60. 146.
Finger power, 53. detection of while operating, 147.
training to develop, 54. similarity of undermining of gingival
decrease in, among dentists, 55. walls of fillings, 147.
Finger rests in operating, 60. Gingival line, note re term, 138.