Technology: general issues 98 human 85 Humans 79 Article 74 chemistry 74 History of engineering and technology 59 hydrogen bond 59 controlled study 50 dental bonding 46 Dental Bonding 45 procedures 45 Research & information: general 43 unclassified drug 39 Hydrogen bonds 32 nonhuman 31 in vitro study 29 dental procedure 28 Chemistry 27 Chemical bonds 25 History of engineering & technology 23 Biology, life sciences 22 Dental Stress Analysis 22 In Vitro Techniques 22 Research and information: general 22 Hydrogen Bonding 21 metabolism 21 resin cement 21 drug effect 20 male 20 Materials Testing 19