SUBJECT INDEX 



731 



Enzyme cvtochemistn , electron micro- 

 scope level, 512 

 Enzyme-producing cells, tissue water 



loss, 690 

 Enzyme transfer, pinosomes, 511 

 Epifauna, 8 



Epifaunal habit, bi\alves, 8 

 Epifaunal origin, bivalves, 12 

 Epincphehis striafiis, 376 

 Epiphyseal cartilage plate, 371 

 Epithelial attachment 



downgrowth, 292, 294 



enamel, 303 



hibernation, 291 

 Epulis tumors, tooth resorptions, 312 

 Equilibrium, enamel dissolution, 251 

 Equilibrium solubility, 214, 255 



calcium fluoride, 256 



enamel, 253 



fluorapatite, 256 



measurements, 254 

 Eroded tooth substance. 111 

 Eroded tooth surface, organic ma- 

 terial, 108 

 Erosion 



see also Dental erosion; Erosion of 

 sheep's teeth 



boring organisms, 39 



corals, 45, 50 



East Indian coral reefs, 5 



periostracum, 18 



rock, 22, 102 



shell, 9, 67 



shell valves, 9, 17 



sponges, 31, 45 



wave effect, 25 

 Erosion-abrasion, 93, 100 

 Erosion agents, rock boring, 22 

 Erosion of atoll reefs, 25 

 Erosion and caries, reverse lelation- 



ship, lis 

 Erosion control, vestibular shield, 120 

 Erosion of corals 



boring sponges, 37, 46 



sediment distribution, 46 

 Erosion-like defects, 99, 100 

 Erosion patient, general constitution, 

 117 



Erosion of sheep's teeth 



see also Attrition of sheep's teeth 



acetate, 167 



chelating agents, 166 



citrate, 167 



electron micrography, 168 



in vitro, organic acids, 166 

 Erosion of teeth, see Dental erosion 

 Erosional eftects, boring organisms, 37 

 Erosional process, boring sponges, 50 

 Erosional remodeling, coral reefs, 46 

 Erosive effects, worn teeth, 166 

 Eruption of teeth, 91, 95, 321 



bone remodeling, 321, 322 



summar\', 336 

 Eskimos, periodontal tissues, 305 

 Estradiol, 358 

 Estrogen, 356 



antler shedding, 354, 357 

 Etat histocvtaire, osteoclasts, 515 

 Etched shell, see Shell etching 

 Etching 



see also Shell etching 



calcite crystals, 31 



hydroxyapatite crystals, 62 



//) vivo enamel, 137 



oyster shell, 31 



rat molars, 139 



sheep's teeth, 167 



teeth, 138 



tooth mineral, by ABO secretion, 62, 

 79 



variability in, 68 

 Ethylenediamine, 64, 75 



effect on shells, 79 

 Ethylenediamine tetraacetate, see 



' EDTA 

 Etiology 



dental caries, 262 



periodontal disorders, 297 

 FAipleiira, 63, 69 



caiidata etterae, 59, 61, 83, 86, 87 

 European oyster shells, 5 

 Evolution of skeleton, resorption cavi- 

 ties, 371 

 Ewes, 161 



incisors, 158 



wear of teeth, 162 



