Ключевые слова: adult, agony, ailment, caucasian, closeup, dark background, dental, dentistry, discomfort, discontent, displeased, displeasure, dissatisfaction, distress, emotional, expression, face, facial expression, frustration, grey, grimace, health, illness, man, middleaged, pain, portrait, problem, sickness, suffering, tooth, toothache, uncomfortable, unhappy, unwell, upset,