ahlam1399
04-09-2015, 08:15 AM
http://i.ytimg.com/vi/TyVV0UDQ_f4/default.jpg (http://www.youtube.com/watch?v=TyVV0UDQ_f4&feature=youtube_gdata)
Why Is Fluoride Good for Teeth? (http://www.youtube.com/watch?v=TyVV0UDQ_f4&feature=youtube_gdata)
If our teeth are made mostly of calcium, why do we use fluoride to keep them healthy? Quick Questions explains why, and how we finally figured it out. Hosted by: Michael Aranda ----------...
From:SciShow (http://www.youtube.com/channel/UCZYTClx2T1of7BRZ86-8fow)
Views:45353
http://gdata.youtube.com/static/images/icn_star_full_11x11.gif http://gdata.youtube.com/static/images/icn_star_full_11x11.gif http://gdata.youtube.com/static/images/icn_star_full_11x11.gif http://gdata.youtube.com/static/images/icn_star_full_11x11.gif http://gdata.youtube.com/static/images/icn_star_half_11x11.gif
3638ratings
Time:02:46More inEducation (http://www.youtube.com/videos?c=27)
أكثر... (http://www.youtube.com/watch?v=TyVV0UDQ_f4&feature=youtube_gdata)
Why Is Fluoride Good for Teeth? (http://www.youtube.com/watch?v=TyVV0UDQ_f4&feature=youtube_gdata)
If our teeth are made mostly of calcium, why do we use fluoride to keep them healthy? Quick Questions explains why, and how we finally figured it out. Hosted by: Michael Aranda ----------...
From:SciShow (http://www.youtube.com/channel/UCZYTClx2T1of7BRZ86-8fow)
Views:45353
http://gdata.youtube.com/static/images/icn_star_full_11x11.gif http://gdata.youtube.com/static/images/icn_star_full_11x11.gif http://gdata.youtube.com/static/images/icn_star_full_11x11.gif http://gdata.youtube.com/static/images/icn_star_full_11x11.gif http://gdata.youtube.com/static/images/icn_star_half_11x11.gif
3638ratings
Time:02:46More inEducation (http://www.youtube.com/videos?c=27)
أكثر... (http://www.youtube.com/watch?v=TyVV0UDQ_f4&feature=youtube_gdata)