~ Food Has Power ~
I'm not a fan of oil pulling IF one has mercury (silver amalgam) fillings in their teeth.
For many years I have known of many people doing oil pulling who LOVE it. I've also heard over the years about people who have loosened their amalgam while oil pulling, and I recognize that heated oil will draw toxins, including heavy metals, from the amalgam. It is the mercury vapors which are the issue.
Take a look at this video of mercury vapor escaping from a 25 year old mercury filling: http://heal-thyself.ning.com/video/dangers-of-mercury-amalgam
Chewing gum, hot liquids, chewing food, drinking liquids - all increase mercury vapors from amalgams also. So, my concern for myself with 10 amalgams, is that I don't want to be swishing amalgam toxins around in my mouth in an oil which is vaporizing mercury for 10-20 minutes each day.
There are many who feel comfortable and perceive benefit from oil pulling with amalgams.
Todd Caldecott, an Ayurvedic herbalist, says that oil pulling (gandusha) for toxin benefit only needs to be 2-3 minutes. "You simply swish the oil between your teeth for 2-3 minutes, and spit. It is generally very helpful in many oral disorders, and different oils (e.g. coconut, ghee, sesame, sabindu etc) have different effects."
Here's a brief review of basic Ayurvedic methods in oral hygiene:
More about oral care: http://www.toddcaldecott.com/index.php/qa/553-herbs-for-healthy-tee...
There are many anti-microbial benefits to using coconut oil. And there are different benefits for using various other types of oils. Coconut oil is fine to use for oil pulling. So is sesame oil. I'd choose organic, if you select a seed oil.