762 



Tracer techniques, turnover of bone, 



430 

 Tranquilizers, osteoporosis treatment, 



436 

 Transamination reactions, a-ketoglu- 



tarate, 599 

 Translocated crystals, 503 

 Translucent zone, enamel caries, 172 

 Transmission of caries, 261, 270 



summary, 278 

 Transmission of cariogenic flora, 268 

 Transport mechanisms, phosphate, 



604 

 Transport of reaction products, enamel 



caries, 257 

 Transudate, bone marrow, 300 

 Traumatic occlusion, 92, 97, 112 

 Triamcinolone, 399 

 a-Tricalcium phosphate, 381 

 Tricarboxylic acids, 639 

 Tridacna 



crocca, 7, 16 



dcresa, 16 

 Tridacnidae. 16 

 Trifolium repens, 155 

 Trigger mechanism, alveolar bone, 



299 

 Triiodothyronine, 425 

 Tropical deer, 347 

 Tropical reef communities, 25 

 Tropism, implants, 528 

 Tro^oocollagen, 668 

 Tropocollagen molecule, 667 

 Trypan blue 



giant cells, 520 



osteoclasts, 520 

 Trypsin, collagen digestion, 685 

 Tube sponges, 44 

 Tube worms, 39 



Tubular reabsorption, phosphate, 427 

 Tukon Hardness Tester, 156 

 Turbellaria, 1 

 Turbo, 4, 81 

 Turnover 



bone, 447, 453, 460 



collagen, 425 



plasma calcium, 376 



SUBJECT INDEX 



tracer technique, 430 

 Twitching, oral soft tissues, 100 

 Tylostyles, 30 



Ultrafiltrable hydroxyproline, collagen- 

 ase-like activity, 572 



Ultrasoft x-rays, 474 



Ultrastructural topography, shell etch- 

 ings, 85, 86 



Ultrastructure 



brush border, 499 

 caries, 187, 190, 207 

 carious dentin, 191 

 osteoclasts, 497 



Unavailable bone, 471 



Uncalcified matrix, resorption, 472 



Uncoupling, oxidative phosphoryla- 

 tion, 600 



Underwater landslides, 46 



Undissociated acid, enamel dissolu- 

 tion, 241 



Unicellular algae, 29 

 in siphonal tissues, 17 



Unifying hypothesis, osteoporosis, 439 



Unit area of bone, 460 



United States Air Force, 296 



United States Atomic Energy Com- 

 mission, 439, 554 



United States Fish and W'ildlife Ser\- 

 ice, 87 



United States Navy Office of Naval 

 Research, 52 



United States Public Health Service, 

 149, 208, 364, 382, 439, 492, 

 529, 587, 634 



Univalve, 62 



Unremodeled bone, osteogenesis im- 

 perfecta, 462 



Urinary excretion curves, 407 



Urinary hydroxyproline, 425 



Urinary indices 

 osteoporosis, 417 

 physiologic aging, 417 



Urinary products, bone breakdown, 

 4i7, 438 



Urosalpinx cine tea foUycusis, 59, 61, 

 63, 69, 73, 75, 77, 83, 85, 86, 87 



