Journey in Life: Sự thật mà nha sĩ ít khi nào “hé răng” nửa lời

Wednesday, May 15, 2019

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

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.


  1. Very good post.

    I'd say there is a lot of accepted fraud in dentistry. They take unnecessary x-rays, replace fillings unnecessarily, always err on the side of something that is billable. And it is apparent that we can't expect the industry to regulate itself.

    This seems like an appropriate case where a science grant from government for research would be indicated.

  2. I was talking to an equally old man who remembered dentistry in the 1950s and also education then. He agreed with me that we'd rather get the cane than dental treatment.

  3. Such was life in Eisenhower's America.

  4. As with medical care, the problem is that many people get dental coverage through their employers today.

    The patient thus has no reason to question billable expenses, and so neither does the dentist. More expensive procedures often take weeks to negotiate between the dentist and the insurer, with the patient taking a back seat. But small things like replacing fillings, the dentist can just do it and bill the insurer and it won't be questioned.