Sự thật mà nha sĩ ít khi nào “hé răng” nửa lời

'lấy cao răng 6 tháng một lần', chẳng có cơ sở khoa học nào cả, các nhà nghiên cứu truy xuất mãi mới biết là xuất phát từ quảng cáo của một công ty kem đánh răng vào những năm 1930
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Common dental procedures are not always as safe, effective, or durable as we are meant to believe. As a profession, dentistry has not yet applied the same level of self-scrutiny as medicine, or embraced as sweeping an emphasis on scientific evidence.

…Consider the maxim that everyone should visit the dentist twice a year for cleanings. We hear it so often, and from such a young age, that we’ve internalized it as truth. But this supposed commandment of oral health has no scientific grounding. Scholars have traced its origins to a few potential sources, including a toothpaste advertisement from the 1930s and an illustrated pamphlet (cuốn sách nhỏ) from 1849 that follows the travails (công việc cực khổ, khó nhọc) of a man with a severe (nghiêm trọng, trầm trọng, khắc nghiệt) toothache (đau răng). Today, an increasing number of dentists acknowledge that adults with good oral hygiene need to see a dentist only once every 12 to 16 months.

The joke, of course, is that there’s no evidence for the 12 to 16 month rule either.

Tags: health

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