Januari 17, 2017
we’ll folks, you asked and we’re answering. that’s right, we heard you. sirawesome hat ask, show us whatyou guys look like, i’m super curious. (words onscreen: who are we?? words onscreen: sophia caiscience writer consultant narrator words onscreen: adam “adamku†dylewskicreator executive producer words onscreen: darcy gentleman, p.h. d.scientific consultant snappy dresser words onscreen: sam lemonick - writer words onscreen: elaine seward writer/animator social media whisperer narrator
words onscreen: janali thompsonminister of youtube promotions words onscreen: sean parsonsanimator camera wizard words onscreen: noel waghorn writer/ scripteditor narrator humor visionary words onscreen: kirk zamieroski writer/narrator animator vagabond) themanlydanny ask, what’s the chemistryassociated with brushing your teeth? at the most basic level, scrubbing yourteeth with a toothbrush helps remove plaque--the sticky film of bacteriathat causes cavities and gum disease. but… that’s mainly physics. so let’s talk about where the chemistry comes in!
when the tooth surface becomes acidic,the tooth enamel becomes demineralized and cavities begin to form. to prevent cavities, we have to remineralize the tooth enamel. your saliva can make this happennaturally, but the fluoride in certain toothpastes can give it a boost. fluoride can be remineralized to form apatite, which protects the tooth enamel from cavity-creating acids. you could say with apatite, you canproperly satisfy your appetite. toothpastes have other chemistry tools.
they contain abrasives, which aresmall gritty particles that help remove plaque and polish your teeth. toothpastes also have detergents. no, you’re not putting tide on your teeth. detergent products, also includingtoothpastes often have the ingredients sodium lauryl sulfate. this is a surfactant. that’s a chemistry term for detergent. surfactants are funny little compoundsthat have tails that hate water,
(we call those hyrdrophobic) and headsthat love water (or hydrophilic). the hydrophobic tails grab onto food and plaque,which themselves hate water, and that’s why they stick to your teethand aren’t rinsed away by saliva. meanwhile the hydrophilic heads oftoothpaste chill out in the water. when you rinse, the tails hold ondesperately to the food and plaque, while the heads catch a wave, so thesurfactants end up taking the food and particles down the drain with them. want more fun facts about toothpaste surfactants? check out this reactions video about whytoothpaste makes orange juice taste soo bad:
https://www.youtube.com/watch?t=111&v=9x5_gtel-c0.
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