It was, as they had hoped, just a blip. After a brutal loss Thursday to the Montreal Canadiens, which abruptly halted a streak in which the Bruins had scored six goals in each of their last three games, the Bruins came back with a commanding 4-0 win over the bottom-dwelling Edmonton Oilers on Saturday afternoon in front of a full house at TD Garden. It was a day on which the Bruins and their fans got to welcome back former defenseman, and current Oilers captain, Andrew Ference, and reestablish themselves against a lackluster opponent. The Bruins took a slim 1-0 lead into the third period, after a second-period score by Loui Eriksson was disallowed, but they broke it open with three in the third, by Dougie Hamilton at 6:43, Carl Soderberg at 13:05, and Torey Krug at 15:42 on a power play. For Hamilton, who celebrated with an exaggerated fist pump, it was his second goal in as many games. Oilers goalie Ben Scrivens, whose shutout streak ended at 126 minutes, 41 seconds when he allowed a David Krejci power-play goal at 2:06 of the second, wasn’t able to do nearly enough to stop a Bruins attack that carved up the Edmonton defense.