A Cochrane Review of Dental Cleanings surprisingly showed no clear
evidence that they are effective. So if you have to pay for them,
there is at least some authoritative evidence that you could skip them
without harm.
See:
http://scienceblogs.com/cortex/2008/...ning_teeth.php
and:
http://freakonomics.blogs.nytimes.co...eaning-a-scam/
Here are a few quotes from those sites:
It turns out there is an entire journal called "Evidence Based
Dentistry." And in just a few minutes, I was looking at a formal
Cochrane review titled "Insufficient evidence to understand effect of
routine scaling and polishing."
The review looked for evidence to answer two related questions:
The first is, do scale and polish procedures [having your teeth
cleaned] lead to any difference in periodontal health compared with no
scale and polish? Second, does the interval between these scale and
polishing procedures make any difference?
The results were not heartening for those of us who have suffered
through dozens upon dozens of cleanings. The meta analysis of
qualifying studies suggested that the evidence was mixed, at best. For
example, there is not strong evidence that hygienist cleaning reduces
gingivitis:
The authors of the only study that found differences in gingivitis
scores (at 6, 12 and 22 months) deemed those differences clinically
irrelevant....
My dad always told me that dealership rust-proofing was a scam to give
dealerships some extra cash without providing your car with any extra
protection. Could getting your teeth cleaned be the economic
equivalent to having a car dealership rust-proof your car?