Science has come a long way in dentistry. We are able to treat conditions and preserve teeth much longer than we used to be able to. However, we still have limitations in the current dental field. Tooth decay is one of the most expensive and prevalent bacterial diseases that humans face. While we have developed some strategies for curbing infection such as drilling out decay and replacing it with filling material, decay frequently comes back. We’re encouraged by the results of a new study that will improve upon our current decay treatment efforts. Although someday we hope to be able to regrow teeth, in the meantime this new research offers better outcomes for preventing new decay in previously treated teeth.