Dent, a four-time winner on tour, missed two full seasons because of three back operations. He was ranked a career-high No. 21 in 2005, and was currently 202nd.
Other American men given wild cards into the year's last Grand Slam, which begins on Aug. 31: Jesse Levine, Devin Britton, Chase Buchanan, Brendan Evans, and Rajeev Ram.
Chris Guccione of Australia and Michael Llodra of France received the last two men's wild cards.
The eight women's wild cards will be announced on Thursday. The U.S. Tennis Association already has said 2005 U.S. Open champion Kim Clijsters, who recently came out of retirement, is receiving a wild card.
The tournament draw is on Aug. 27.
Keirrison open to Roma loanWilliams sisters, Clijsters lead U.S. Open field
