MONTREAL (AP) -- Max Pacioretty was hardly in the mood to celebrate after his game-winning goal for the Canadiens.

The big forward sent Boston Bruins defenseman Johnny Boychuk to the hospital with a first-period check into the boards Thursday night, then scored the go-ahead goal in the second during Montreal’s 2-1 victory.

Pacioretty’s ninth goal in the last nine games helped the Canadiens stretch their unbeaten run to nine games (8-0-1). It also put Montreal (18-9-3) in first place in the Atlantic Division, a point ahead of Boston (18-8-2), which has two games in hand.

Pacioretty, however, wasn’t smiling.

Only 4:28 into the first meeting of the season between these bitter rivals, Pacioretty checked Boychuk into the end boards in the Montreal zone. Boychuk went face first into the top of the boards and fell to the ice.

He was on his knees, taking heavy breaths, for several minutes before trainers and medical staff got him onto a stretcher and wheeled him off the ice.

After the game, Bruins coach Claude Julien said Boychuk was released from the hospital and would travel with the team back to Boston. Julien had no details about the injury, which Bruins players said appeared to be a back problem.

The hit wasn’t hard, but it was somewhat from behind. Pacioretty was given 2 minutes for boarding, which both teams felt was the right call.

The Bruins seemed to agree, and none of them rushed to seek vengeance as is often the case when a teammate gets hurt. The injury quieted the Bell Centre crowd and took some steam out of the play on the ice for the rest of the period.

"I think they gave me the benefit of the doubt," Pacioretty said.

And the Canadiens, outshot 10-3 in the opening period and down 1-0 on a goal by Gregory Campbell, jumped on Boston in the second with an 18-7 shots advantage and goals from Tomas Plekanec and Pacioretty.

The Bruins stormed back in the third, but couldn’t beat Carey Price, who finished with 32 saves. Montreal put 27 shots on Tuukka Rask.

Boston had not played since Saturday, while Montreal was coming off a 4-3 shootout win Wednesday night in New Jersey.

Boston got the first goal at the 17:35 mark. Andrei Markov cleared the puck to the Boston blue line, where Dennis Seidenberg kicked it forward, sending Milan Lucic in on a 2-on-1 break. The big wing slipped a pass to Campbell for a shot.

Plekanec tied it 9:16 into the second when he beat Rask from a tight angle with a medium-speed wrist shot.