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Abstract：
This case report presents treatment of a severe localized horizontal bone loss combined with infrabony defects adjacent to pathologically migrated teeth by orthodontic intrusion following a graft of enamel matrix derivative (EMD) without root surface conditioning. The patient was diagnosed with Angle Class II malocclusion, anterior spacing, and pathologically migrated incisors. Graft of EMD mixed with bone materials was applied for periodontal regeneration before orthodontic treatment, and periapical radiographs were taken every 3 months for radiographic evaluation. After closure of anterior spaces by orthodontic treatment, infrabony defects improved dramatically, with a favorable alveolar bone level and periodontal pocket depth.
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