The victory snapped a nine-game winning streak for the road team in the series, and the Magic lost for the 26th time in 29 games despite a third-quarter surge that put them in front.
The Mavericks put away an Orlando team playing on the second night of a back-to-back with a 17-0 fourth-quarter run that restored the double-digit lead they had in the second quarter.
Carter finished with 14 points and had another burst of key 3-pointers to help Dallas retake the lead.Dirk Nowitzkihad 12 points and a team-high nine rebounds.
Dallas led 94-90 when Carter hit his fourth 3-pointer, and Nelson andDarren Collisongot tangled up on a jump ball on the other end. Nelson ended up leaving with a leg injury, Collison easily won the jump and Carter assisted on a short jumper byBrandan Wright. After a miss by Afflalo, Carter had another assist on a dunk by Wright for a 101-90 Dallas lead.
Carter had his third assist on the run when he stole a pass in the backcourt after an Orlando rebound and flipped the ball behind his back to Marion for a dunk.
Dallas trailed 79-73 when a wild 1-minute sequence ended with the Mavericks in front 80-79. It actually started with a miss by Collison, and Carter tipped the ball toward midcourt, where a scramble ensued. Nelson ended up with the ball and fedJ.J. Redick, but his layup was blocked byO.J. Mayo, who went the other way and fed Carter for an alley-oop dunk.
After a miss by Redick, Collison found Carter in transition for a 3-pointer from the right wing, and Collison took it himself after another Orlando miss, got fouled on a drive and hit both free throws to put Dallas ahead 80-79 with 1:06 left in the third.
E'Twaun Moore hit a 3-pointer to put Orlando ahead 82-80, but Carter answered with another from long range to put Dallas in front for good.
The Magic closed a 16-point deficit in the second quarter to two, capitalizing on a 1-of-16 shooting stretch by the Mavericks after Dallas shot 64 percent in a 42-point first quarter, its highest-scoring quarter of the season.
Redick had a three-point play and another jumper to start Orlando's 21-7 run to get back in the game, but the Magic didn't score again in the first half after two free throws by Vucevic pulled them within 55-53 with 1:06 remaining.
Vucevic had 10 points and eight rebounds in the first half.
Nowitzki ended a stretch of 10 straight misses by Dallas on a jumper with 4.9 seconds left in the half to give the Mavericks a 59-53 lead.
Carter hit a 3-pointer at the first-quarter buzzer to give the Mavericks a 42-30 lead. Both teams shot better than 60 percent, and Brand led eight Dallas scorers with nine points, including seven straight for the Mavericks late in the quarter.
Dallas' previous high for a quarter was 40 in the second quarter against Washington on Nov. 14, and it was the second straight night the Magic allowed their highest-scoring quarter. Charlotte had 37 in the first in a 105-92 win on Tuesday.
NOTES: Mavericks CChris Kamanwas inactive, missing his ninth straight game with a concussion. He was injured when he hit his head on the court during practice Jan. 28. ... The Mavericks observed a moment of silence before the game for Lakers owner Jerry Buss, who died Monday. ... Mavericks C Bernard James, a former staff sergeant in the Air Force, had a video greeting for fans on Dallas' military appreciation day, and 10 new members of the Air Force were sworn in during a timeout.