WILMINGTON — The Bruins began their first practice of the postseason Tuesday in preparation of their first-round matchup with the Canadiens. A couple of reinforcements are in town in the form of Anton Khudobin and Matt Bartkowski. Bartkowski is here as a depth guy in place of Steven Kampfer, who is out at least two weeks with a knee injury suffered over the weekend while playing for Providence. Kampfer is with the Bruins at Ristuccia, but will do off-ice work and will work with the medical staff.

The color-coded lines are no different than one would expect. They are as follows:

Milan Lucic – David Krecji – Nathan Horton

Brad Marchand – Patrice Bergeron – Mark Recchi

Rich Peverley – Chris Kelly – Michael Ryder/Tyler Seguin

Daniel Paille – Gregory Campbell – Shawn Thornton

The B’s also announced their Black Aces. In addition to Bartkowski, Khudobin and the injured Kampfer, they are Michael Hutchinson, Jamie Arniel, Jordan Caron, Zach Hamill, Lane MacDermid, Trent Whitfield and Yury Alexandrov.

The Bruins lead the Islanders, 1-0, after a period thanks to Nathan Horton’s 20th goal of the season.

Horton beat Al Montoya by kicking a rebound off a Milan Lucic shot back to himself and firing it in. He now has goals in two straight games and six goals in his last 10.

The Bruins went 0-for-2 on the power play, failing to take advantage of penalties to Justin DiBenedetto and Kyle Okposo. Matt Bartkowski was the only Bruin sent to the sin bin, and a sprawling Tim Thomas came up big for the B’s by stopping an onslaught with Boston shorthanded.

The Islanders outshot the Bruins, 11-8, in the period.

The Bruins’ morning skate for Saturday was of the optional variety, so there’s no telling who will be between the pipes vs. the Penguins later on.

The Bruins tweeted that it was Matt Bartkowski, Shane Hnidy, Zdeno Chara, Tomas Kaberle, Adam McQuaid, Dennis Seidenberg, Gregory Campbell, Brad Marchand, Tyler Seguin, Chris Kelly, and Tuukka Rask taking part in the skate. Bartkowski is playing after being called up due to Steven Kampfer’s concussion, while Seguin will be in the lineup because personal matters have caused Patrice Bergeron to travel elsewhere.

The Bruins have won seven games in a row and can make it eight with a victory over the fourth-place Penguins. Pittsburgh has struggled of late, but that can be expected from a team playing without Sidney Crosby and Evgeni Malkin. The Penguins have won just one of their last seven games, going 1-2-4. Five of their last seven have gone into overtime.

The Bruins announced Friday that they have recalled defenseman Matt Bartkowski from Providence on an emergency basis. The news comes on the same day that defenseman Steven Kampfer was diagnosed with a mild concussion. With Andrew Ference also on the mend due to a lower-body injury, the B’s found themselves with only five defensemen prior to the call-up.

Bartkowski, a native of Pittsburgh, has played two games in his NHL career, and coincidentally, both have been against the Penguins. The Bruins host the Penguins Saturday night.

Bruins coach Claude Julien told reporters prior to Saturday’s game against the Penguins that Tuukka Rask will start for the B’s. Rask’s last start came against the Penguins, as he earned a win in the Bruins’ 4-2 come-from-behind victory in Pittsburgh on Monday.

Milan Lucic will miss his third straight game with an undisclosed injury, while Andrew Ference will miss his first game of the season due to an upper-body injury. Ference, who played in the team’s first 43 games, left Thursday’s 7-5 victory over Philadelphia after the second period. Rookie Matt Bartkowski, who was called up from Providence on an emergency basis Friday, is expected to play in his place.

Bartkowski made his NHL debut on Monday in Pittsburgh, posting a minus-1 in 9:53 of ice time. He was filling in for Adam McQuaid and was returned to Providence the following day.

Bruins coach Claude Julien told reporters on Friday that defenseman Andrew Ference is dealing with an upper-body injury, explaining his absence in the third period of Thursday night’s 7-5 win over the Flyers.

Julien said that Ference is “very questionable” for Saturday’s game against the Penguins.

“We’re hoping it’s minor enough that we’ll see him back soon,” Julien said.

Given Ference’s status, the Bruins on Friday morning called up Matt Bartkowski on an emergency basis from Providence.

The Bruins announced prior to the second period of Monday night’s game vs. the Senators that they have assigned defenseman Matt Bartkowski to Providence. Bartkowski, 22, was recalled on an emergency basis Sunday night and made his NHL debut Monday in place of the injured Adam McQuaid.

McQuaid was suffering an undisclosed injury, though he made his return to the lineup on Monday, logging 5:45 of ice time in the first period.

In 34 games in Providence this season, Bartkowski has four goals and eight assists for a total of 12 points.