SUBJECT INDEX 



753 



Rabbit, cortisone-induced osteoporosis, 



456 

 Rachitic birds, parathyroid extract, 



535 

 Rachitic bone, implantation, 526 

 Rachitic osteoid, 515 



calcification, 520 

 Racial factor in osteoporosis, 418 

 Radiation injury, 92, 97 

 Radiation treatment 



gingival inflammations, 311 



periodontal conditions, 311 

 Radioactivated saliva, enamel uptake, 



142 

 Radioactive calcium, 377, 402 

 Radioactive collagen microassay, 685 

 Radioactive elements, salivary circula- 

 tion, 141 

 Radioactive isotopes 



diffuse component, 448 



external counting, 448 



rare earths, 450 

 Radioactive phosphorus, 372 



uptake by monkey teeth, 141 

 Radioactive strontium, 391, 402 

 Radioassay, total body counting, 393 

 Radiodensity, enamel, 136 

 Radioisotope gradients, enamel, 142 

 Radioisotope kinetics 



bone metabolism, 391 



mathematical treatment, 431 



osteoporosis, 402 

 Radioisotope uptake, saliva, 141 

 Radiolucence, enamel caries, 173 

 Radiotracer studies, monkey teeth, 



141 

 Radium, 372, 377 



body burden, 378 

 Radium-burdened bone, 448 



bizarre resorption, 455 

 Radula, snail, 4, 56, 57, 81, 83 



rasping action, 56, 57 

 Radular denticles, snail, 57, 60, 71, 



81,86 

 Radular teeth, see Radular denticles 

 Rana cateshiana, 664, 665 

 Rangifer tarandus, 347 

 Rare earths, radioactive isotopes, 450 



Rarefying disease of skeleton, 385 

 Rarefying jaw lesions, 95 

 Rasping period, snail, 57 

 Rasping radula, see Radula 

 Rat calvaria, metabolic action, 589 

 Rat molars 



demineralization tests, 138 



etching, 139 

 Rat teeth, chemical erosion, 100 

 Rate of calcification, corals, 50 

 Rate of formation, incipient carious le- 

 sions, 253 

 Rate of penetration, shell, 59 

 Rate of reaction, enamel dissolution, 



236 

 Rate of retention, bone-seeking iso- 

 topes, 416 

 Rate of resorption 



bone, 457 



collagen, 673 

 Rate of synthesis, collagen, 673 

 Ratios, solution to sohd, 254 

 Rats 



crania, 481 



mutant strain, 565 



osteoporosis, 433 



parathyroid extract, 532 

 Reaction products 



calcium fluoride, 257 



dicalcium phosphate, 257 



enamel dissolution, 250 



hydroxvapatite surface, 254 



transport, 257 

 Reaction rate, enamel dissolution, 236 

 Reactive form, bone mineral, 381 

 Reactivity, bone mineral, 381 

 Reconstituted collagen 



gels, 664 



proteases, 685 

 Reconstitution, enamel surface, 145 

 Recrvstallization 



CaHPO^, 206 



caries process, 206 



enamel caries, 191 

 Red deer, antlers, 347, 352 

 Red Sea, coral reefs, 50 

 Redeposition of minerals, enamel, 149 

 Reef, see Coral reefs 



