Bosh had 23 points and 13 rebounds and Bargnani added 22 points as Toronto won for the seventh time in their last eight home games.
“We came out ready and didn’t have any lapses,” Toronto guard Jarrett Jack, who had 11 points and seven assists, told reporters. “We were able to put a very good team away early.”
The victory lifted the Atlantic Division’s No. 2 team above the .500 mark to 21-20. The Raptors trail the idle Boston Celtics by seven and a half games.
Southwest leader Dallas (26-14) was led by Dirk Nowitzki’s 19 points and Jason Terry’s 18.
Toronto overcame a 23-20 first-quarter deficit to outscore the Mavericks by 16 points in the second quarter. The hosts were never threatened after that, leading by as many as 26 points late in the fourth.
