Ключевые слова: adult, care, caucasian ethnicity, chinese ethnicity, dental equipment, dental health, dentist, discussion, doctor, equipment, expertise, females, general practitioner, healthcare and medicine, holding, hospital, hygiene, illness, indoors, looking, males, mature adult, medical occupation, medicine, men, mid adult, nurse, occupation, office, patient, professional occupation, protective mask, protective workwear, science, smiling, stethoscope, surgeon, surgery, surgical glove, surgical mask, talking, teamwork, two people, uniform, women, working, workwear, young adult, young women,