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The Dentistry IQ Network, run from Oklahoma, have reported on a team of dentists from Tukwila, just south of Seattle, who volunteer their time and expertise as dental consultants to zoos and aquariums in the region.

According to Dentistry IQ's Managing Editor, Kevin Henry, endodontist Dr Edmund Kwan recently performed a root canal on Boris, a polar bear weighing over 65 stone, who was suffering from an abscess. Other medical professionals removed a mass from Boris' right eye and trimmed his toenails while Boris was anaesthetised. Dr Kwan restored Boris' 3.5 inch-long right canine with a silver filling.

Dr Kwan has also carried out dental treatment on gorillas, tigers, sea otters, wolves and a hyena.

Pictures of Boris' operation can be viewed at the following link: https://doi.org/www.thenewstribune.com/2013/02/23/2486876/root-canal-eye-work-for-point.html.