A man told on Monday how his wife ended up swallowing part of a screwdriver during a visit to a Hungarian dentist.

A dentist’s injection typically causes numbness for several hours. This experience could soon be history. Scientists have been able to block the pain and numb...

Ken Michener’s tooth had been hurting off and on for months, and the pain was intense one Monday night in August. So Michener, 31, of Naperville, Illinois, who...