Buffalo Sabres defenceman Rasmus Ristolainen scored at 9:42 of overtime to give Finland its third world junior hockey title, 3-2 over Sweden on Sunday.
Ristolainen picked up the puck along the right boards, cut in front of the goal and slid a backhander under goalie Oscar Dansk's right leg pad. Finland also won the under-20 event in 1987 in Czechoslovakia and 1998 at home in Helsinki.
Sweden's tied it at 2 on Christian Djoos' power-play goal with 9:07 left in the third period.
Finland's Era Lindell scored 28 seconds into the game, and Lucas Wallmark tied it on a power play at 7:53 of the second. Finland regained the lead 45 seconds later on Saku Maenalanen's goal.
In the third-place game, Russia beat Canada 2-1.