BOSTON — Boston Bruins defenseman Dennis Seidenberg will miss the rest of the season because of torn knee ligaments.

He was injured in the third period Friday night when he became entangled with Ottawa forward Cory Conacher behind the Bruins’ goal.

Seidenberg tore his anterior cruciate ligament and medial collateral ligament in his right knee. General Manager Peter Chiarelli said in a statement Saturday the expected recovery is 6 to 8 months.

Seidenberg has a goal and nine assists in 34 games this season. During his career, he has also played for Philadelphia, Phoenix, Carolina and Florida.

The Bruins recalled defenseman Zach Trotman from Providence of the AHL and assigned goaltender Niklas Svedberg. Trotman is eligible to play in Saturday night’s game at Ottawa.