The title is a bit misleading... you still have to drill away the dead stuff, it looks like. That said, this is the best part:

“The tooth is not just a lump of mineral, it’s got its own physiology. You’re replacing a living tissue with an inert cement,” said Sharpe. “Fillings work fine, but if the tooth can repair itself, surely [that’s] the best way. You’re restoring all the vitality of the tooth.”