소구치 발치 교정치료 과정에서 발생한 치조골 외골증과 짧은 임상치관의 치주 수술 치험례

Periodontal Surgery for Alveolar Exostosis that Occurred during Orthodontic Treatment with including Extraction of Premolars

The purpose of this case report was to describe a method for treating alveolar exostosis that occurred during orthodontic treatment with premolars extraction. A 25-year-old female patient presented with chief complaints of lip protrusion, crowding, and gummy smile. She was diagnosed as a hyperdivergent skeletal Class II patient with a facial asymmetry. After extraction of the four first premolars, mini-implants were placed between the maxillary second premolars and first molars, and between the maxillary central incisors to retract and intrude the maxillary anterior teeth. During retraction of the maxillary anterior teeth, alveolar bone exostosis around them worsened, and their clinical crown length became shorter. So, alveoloplasty and crown lengthening were performed by a periodontist to remove the alveolar bone exostosis. The total orthodontic treatment duration was 31 months. Lip protrusion and gummy smile were improved and dentitions were well aligned with a complete closure of the extraction space. The maxillary anterior alveolar exostosis, which had occurred during retraction and intrusion of the maxillary anterior teeth, was greatly improved. After one year of retention, stable occlusal relationship, proper overjet and overbite, and good maintenance were confirmed.