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Narwhals have a single, long tusk, which is an incisor tooth normally from the left side of the upper jaw. These tusks can be 3 metres (nearly 10 feet) in length and weigh up to 10 kg (22 lbs). Rarely, (about 1 in 500) a male will grow two tusks. In extremely rare cases female Narwhals may also grow a tusk. The Vikings believed Narwhal tusks had magical powers and bought and traded the tusks for more than their weight in gold.

Source: Norfolk Museums and Archaeology Services 

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In a follow-up to Inside Dentistry’s January 2007 cover story, “Oral Cancer: The Forgotten Disease,” Michael A. Kahn, DDS, offers this pictorial mini-guide to identifying early oral cancer lesions.

One of the greatest unmet challenges in diagnostic dentistry and its applications in restorative treatment planning is a practical and economical method for evaluating parafunctional activity.

As dental professionals, there is a responsibility and obligation to the patients to examine and evaluate them for all oral diseases using the most clinically relevant diagnostic modalities available.

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