Kim Yu-na of South Korea won the gold medal at the world figure-skating championships in London, Ontario.

LONDON, Ontario — The Queen has reclaimed her crown.

Back at the world championships for the first time in two years, Olympic champion Kim Yu-na of South Korea looked as if she had never been away Saturday night.

“It has been very long,” Kim said. “I’m very happy to skate well here in Canada again. So thank you.”

It wasn’t just her margin of victory — with 218.31 points, she was a whopping 20.42 points ahead of defending champion Carolina Kostner of Italy — but the stunningly simple beauty of her performance. There is a regal elegance to her skating, fitting for the woman who is nicknamed “Queen Yu-na.”

Kim is technically superior. Her spins are quick and tight, with intricate positions that don’t seem humanly possible.

Meanwhile, U.S. women didn’t win medals, but they got the next-best thing, reclaiming a third spot for the 2014 Sochi Olympics. They needed a combined placement of 13 or better to earn the third spot, and Ashley Wagner of Alexandria, Va., was fifth and Gracie Gold of Springfield, Ill., got sixth.

“We got three spots back, and we came here to do that,” Wagner said. “Mission accomplished.”

Meryl Davis and Charlie White, the five-time U.S. champions, won their second world title in ice dance.