BOSTON—Team doctors announced that Bruins defenseman Zdeno Chara was cleared to return to the ice for the third period of tonight's game with the Calgary Flames after he used the 15-minute intermission to rehabilitate from a fractured skull and broken leg he received during the first period of play. "He's a tough kid," said team physician Dr. Thomas Gill, adding that Chara will forego wearing a brace that would hold together his snapped femur so that his mobility is not impeded. "Because his head is so swollen, he probably won't be able to fit into a helmet, but he prefers it that way." Chara didn't miss one shift during the third period, tallying one assist and an empty-net goal.