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<div id='article-page'><div id='article-content' data-media-url='//news-app-staging.s3.amazonaws.com' data-base-url='//news-app-staging.herokuapp.com' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/fish_audio.m4a' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='Can Fish Teach Humans to Regrow Teeth?' data-article-id='945'><script src='//news-app-staging.herokuapp.com/javascripts/getscripts.js'></script><link rel='stylesheet' href='//news-app-staging.herokuapp.com/stylesheets/article.css' type='text/css' /><div class='article'><p><span data-start-time='0' data-end-time='4792'>Most people are born with two sets of teeth. </span> <span data-start-time='4792' data-end-time='10458'>They use baby teeth to break down food as children. </span> <span data-start-time='10458' data-end-time='19083'>As they become adults, the baby teeth are replaced with permanent or adult teeth. </span> <span data-start-time='19083' data-end-time='28167'>By age 65, 30 percent of all people worldwide have lost all their teeth.</span> </p><p><span data-start-time='28167' data-end-time='33083'>But most bony fish can regrow their lost teeth. </span> <span data-start-time='33083' data-end-time='50063'>A team of scientists is wondering if that ability of some fish could somehow lead to human tooth regeneration, with adult men and women producing additional teeth as needed.</span> </p><p><span data-start-time='50063' data-end-time='52917'>Fish do it all the time. </span> <span data-start-time='52917' data-end-time='58250'>Whenever they lose a tooth, a new one drops into place. </span> <span data-start-time='58250' data-end-time='62271'>Cichlids are a popular tropical fish. </span> <span data-start-time='62271' data-end-time='66104'>They keep their teeth throughout adulthood.</span> <span data-start-time='66104' data-end-time='71417'>If a tooth should fall out, another one takes its place.</span> <span data-start-time='71417' data-end-time='80104'>Todd Streelman teaches biology at the Georgia Institute of Technology in Atlanta. </span> <span data-start-time='80104' data-end-time='87375'>He is working with cichlids to find out which genes help the fish keep their teeth. </span> </p><p><span data-start-time='87375' data-end-time='93667'>Our approach is to find things that are hard to study otherwise and then target them in these animals.</span> <span data-start-time='93667' data-end-time='101604'>So in this case, Lake Malawi cichlid fishes and many other fishes regenerate their dentition throughout their entire life.</span> <span data-start-time='101604' data-end-time='108917'>As a result, a mouthful of teeth is replaced every 50 days. </span> <span data-start-time='108917' data-end-time='119542'>Professor Streelman and his team reported on their study of cichlids in the journal Proceedings of the National Academy of Sciences. </span> <span data-start-time='119542' data-end-time='127688'>They looked at embryotic cell tissue that can develop into either teeth or taste buds.</span> </p><p><span data-start-time='127688' data-end-time='136646'>And what we found were some really interesting commonalities between teeth and taste buds at their earliest development.</span> </p></div><div class='control-buttons-sticky' style='display:none;'><div class='control-buttons'><button title='Back' class='back' disabled='disabled'></button><button title='Play' class='play' disabled='disabled'></button><button title='Pause' class='pause' style='display:none;'></button><button title='Forward' class='forward' disabled='disabled'></button><button class='finished-reading' style='display:none;'>Done</button></div></div></div><div id='article-media'><div id='media-image'><img src='https://news-app-production.s3.amazonaws.com/articles/594/teeth_image.jpg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=4409 data-hint-location='93667' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/what_does_regenerate_mean.m4a'>What does regenerate mean?</div><div class='choices' data-correct-choice='to grow again after being lost'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/the_main_idea.m4a'><span>the main idea</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/to_express_together.m4a'><span>to express together</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/the_arrangement_or_condition_of_the_teeth.m4a'><span>the arrangement or condition of the teeth</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/to_grow_again_after_being_lost.m4a'><span>to grow again after being lost</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=4410 data-hint-location='33083' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/what_are_the_scientists_studying.m4a'>What are the scientists studying?</div><div class='choices' data-correct-choice='tooth regeneration'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/teleportation.m4a'><span>teleportation</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/tooth_regeneration.m4a'><span>tooth regeneration</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/cell_growth.m4a'><span>cell growth</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/limb_regeneration.m4a'><span>limb regeneration</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=4411 data-hint-location='127688' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/streelman_found_a_link_between_the_development_of_teeth_and__blank_.m4a'>Streelman found a link between the development of teeth and <span class='blank'>taste buds</span>.</div><div class='choices' data-correct-choice='taste buds'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/weight.m4a'><span>weight</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/vocal_folds.m4a'><span>vocal folds</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/taste_buds.m4a'><span>taste buds</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/594/vision.m4a'><span>vision</span></div></div></div><div class='question-buttons'><button class='skip-button'></button><button class='hint-button'></button><button class='speak-button'></button></div></div></div>
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