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Traumatic ulcer is usually a single lesion with erythematous, non-everted margins and with a clean base covered with a pseudomembrane. They are usually painful and occur due to bite or trauma from sharp teeth or ill-fitting dentures. They disappear in 7–10 days following elimination of the cause. If there is any clinical suspicion, a biopsy is indicated.

Figure 1: Traumatic ulcer on the right lower lip, due to trauma caused by the incisal edge of the upper central incisor tooth.
Figure 2: Traumatic ulcer caused by the sharp buccal cusps of the left maxillary third molar tooth.
Figure 3: Traumatic keratosis of the left buccal mucosa, with indentations caused by habitual cheek bite due to extruded upper molars and missing lower teeth.
Figure 4: Traumatic keratosis left buccal mucosa. Note the whitish patch in the posterior left buccal mucosa caused by chronic trauma of the buccal cusps of maxillary and mandibular third molar teeth.
Figure 5: Traumatic keratosis. Note the white patch in the posterior part of the buccal mucosa caused by trauma from sharp buccal cusps of the maxillary third molar.
Figure 6: Traumatic ulcer (arrow) in the right lateral margin of the tongue caused by irritation of the dorso-lingual cusp of the mandibular canine teeth.
Figure 7: Angina bullosa haemorrhagica. Note a bulla caused by an accidental bite of the maxillary teeth (arrow) on the left lateral margin of the tongue.
Figure 8: An 1.5x1 cm exophitic growth in the left lateral margin tongue caused by trauma of root stumps of 1st and 2nd left mandibular molars. There was no induration on palpation. The lesion regressed completely after extraction of the root stumps.
Figure 9: Traumatic ulcer with malignant transformation left lateral tongue margin. Note the ulcerative lesion with rolled out borders caused by chronic irritation from the root stumps of the left mandibular second premolar and first molar.
Figure 10A: Traumatic ulcer on the right lateral border of the tongue. On palpation ulcer is tender and non-indurated. Figure B: Healing ulcer two week after extraction of the right lower molars.
Figure 11: Epulis fissuratum. Note the 2x1 cm linear fissure in the left maxillary mucobuccal fold of this 59–year-old woman who had been wearing the same dentures for the past four years.
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