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Department of tongue cancer is more common to the edge of the tongue. The incidence of tongue cancer is an important subject due to the edge of the tongue caused by long-term mechanical stimulation of the tongue edge of chronic ulcers, chronic ulcers that often by sharp teeth sharp teeth residual root and crown, caused by poor restoration. So the mouth of sharp edges or ectopic tooth and root, and crown and bad restoration should be in time, eliminate the cause, be closely observed, if more than two weeks of oral ulcers heal, uplift occurred around the ulcer and other changes, it should be consider the possibility of tongue cancer, which should in time for the biopsy, to be confirmed, but to remove the cancer-causing factors, prevention or early diagnosis of tongue cancer medical education network collected