A UK dentist has been traveling around the globe to work on some of the world's deadliest mammals and the “monstrous” teeth of lions, tigers and bears. /VCG Photo

Paul Cassar, a dentist based in Liss, Hampshire, runs his own dental clinic where he treats clients with tooth troubles ranging from flossing to fillings. /VCG Photo

However, he began to work with International Animal Rescue (IAR) 16 years ago and delved into the mouths of lions, tigers, bears, leopards, slow lorises and orangutans. /VCG Photo

When asked about the difference between human and animal teeth, he said the difference is in the scale, since many giant mammals tend to have much bigger teeth and he must modify the techniques as well as the equipment to suit the treatment. /VCG Photo

The brave dentist rescued almost all the “dancing bears” from India and he relocated them in a sanctuary. Since then, he began to set up centers for bears in Armenia and Syria. /VCG Photo