A female polar bear at Assiniboine Park Zoo died Tuesday of cardiac arrest, while under anesthesia after dental surgery, officials say.
Aurora was nine years old.

KEN GIGLIOTTI / WINNIPEG FREE PRESS
Aurora in the spring of 2014.
The bear was initially found wandering near the Churchill airport, and had lived at the Winnipeg zoo since 2013. Despite attempts at the time to locate the bears mother, it was never found and Aurora likely wouldve died in the wild, senior director of zoological operations Grant Furniss said Thursday.
Aurora was a beautiful, very well-loved bear a fantastic ambassador for her species in the wild and she will be very, very deeply and sorely missed by our guests, staff and volunteers, Furniss told reporters at the zoo.

ASSINIBOINE PARK CONSERVANCY / FREE PRESS FILES
Aurora just before being transferred to the International Polar Bear Conservation Centre (IPBCC) at the Assiniboine Park Zoo in2013.
As a cub in the wild, the bear had chewed sticks and rocks, damaging its teeth extensively.
At the zoo, shes been receiving ongoing dental treatment and thats to provide pain relief, any kind of infection or longer-term life-threatening diseases that can occur from having bad teeth, Furniss said.
The bear had had seven dental treatments prior to its death, including four root canals, improving its quality of life, Furniss said.

KEN GIGLIOTTI / FREE PRESS FILES
Aurora and Kaska tussle in their saltwater tank in the summer of 2014.
The (Tuesday) procedure actually went very well, but towards the end, when we were wanting to reverse the anesthesia, Aurora went into cardiac arrest, he said, noting the surgery was supervised by a specialized veterinary dentist.
The team worked to reverse the cardiac arrest, the director said, but was unsuccessful.
Furniss said the zoo will continue to do tests to determine what went wrong. Preliminary investigations, theres nothing conclusive that there was any underlying condition, but we will pursue it and try and find out exactly what happened.

TREVOR HAGAN/ FREE PRESS FILES
Aurora entertains zoo visitors in 2015.
Furniss said polar bears typically survive up to 18 years in captivity, though Assiniboine Park Zoo once had one that survived into its 40s. In the wild, such bears typically live to around 15.
Aurora will be cremated. There are nine polar bears remaining at the zoo in two exhibits.
erik.pindera@freepress.mb.ca
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Erik Pindera
Reporter
Erik Pindera reports for the city desk, with a particular focus on crime and justice.