Since the inception of dentistry, it has been a battle of fighting off the inevitable. Once teeth begin to decay, dentists just do their best to slow the eventual loss of the tooth. Fillings wear out over time and must be replaced. Sometimes cracks or microscopic gaps in fillings allow further deterioration of the tooth. Trauma to teeth also almost certainly means the eventual replacement of that tooth with an artificial one. But, new science may change that in the not-too-distant future. Scientists at the University of Plymouth have made exciting breakthroughs that suggest it may be possible to regrow teeth after caries or trauma.