Ключевые слова: biology, bone, canine, cast, cavities, decay, dental, dentist, denture, dentures, education, elderly, enamel, exclusion, filling, frontal, gypsum, health, healthy, human, hygiene, incisor, invert, isolate, jaw, lower, medical, model, molar, mouth, negative, old, oral, plaster, premolar, prosthesis, root, scale, science, shape, smile, teeth, tooth, toothbrush, upper,