Tuberculosis (TB) is a chronic infectious disease caused by Mycobacterium tuberculosis. In the oral cavity, clinical manifestations are considered atypical lesions. The aim of this study was to report an unusual granular ulcer secondary oral TB that does not heal, chronic, had irregular appearance with deep depression of 2 cm in diameter, and was located in buccal mucosa of the premolar area-the left mandibular arch, of a 42-year-old woman. The patient was subjected to surgical excision of ulcer in its entirety and accordingly a periodontal plastic surgery in the area of the lesion was performed positioning an autograft subepithelial connective tissue. We obtained optimal results in improving oral health, function, and patient's comfort, in postoperative controls at 15, 30, and 60 days, respectively.
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