The toothlike structures represent a step toward bioengineered replacements for dental implants, say researchers behind the work.

When Homo sapiens appeared some 300,000 years ago, at least six other human species ... knew he and Zanolli, the tooth expert, could compare their molar with the two teeth on the jawbone.

Scientists have found evidence of bacteria that cause tooth decay and gum disease ... a type of bacteria in the human mouth responsible for cavities. The teeth are believed to have belonged ...