Department of Orthodontics, School of Dentistry, Rio de Janeiro State University, Rio de Janeiro, Brazil.
Dent Traumatol. 2011 Jun;27(3):241-6. doi: 10.1111/j.1600-9657.2011.00975.x.
This case report refers to an 18-year-old female who suffered from dental trauma when she was 7 years old caused by a bicycle accident. Her maxillary right central incisor was avulsed, and the left one was extrusively luxated. The left central incisor was correctly repositioned and immobilized with a semi-rigid splint. The right one could not be found. She presented with class II malocclusion and severe negative arch-length discrepancies in both arches. The treatment objectives were the following: recover smile esthetics by replacing the maxillary right central incisor, correct the class II relationship, and optimally reduce mandibular and maxillary crowding. Extractions of the maxillary left lateral incisor and the lower right first bicuspid were performed; thus, the maxillary right lateral incisor would function as a maxillary right central incisor, the canines would function as lateral incisors, and the first bicuspids would function as canines. This allowed for the malocclusion to be corrected while simultaneously reestablishing the smile esthetics, without the use of an osseointegrated implant. A good occlusion with coincident upper and lower midlines was achieved. After orthodontic therapy, the patient underwent periodontal surgery to improve her gingival margins. Subsequent teeth bleaching was performed, and the patient received six porcelain veneers. A combination of orthodontic space closure and prosthetic rehabilitation may be the best treatment option after severe traumatic tooth loss.
本病例报告涉及一位 18 岁女性,她在 7 岁时因自行车事故遭受牙外伤。她的右上中切牙被拔出,左上中切牙被向外脱位。左上中切牙被正确复位并用半刚性夹板固定。右上中切牙无法找到。她表现出 II 类错颌,且两个牙弓的严重负性牙弓长度不调。治疗目标如下:通过替换上颌右侧中切牙恢复微笑美观,纠正 II 类关系,并最大限度地减少下颌和上颌拥挤。上颌左侧侧切牙和下颌右侧第一双尖牙被拔除;因此,上颌右侧侧切牙将作为上颌右侧中切牙,尖牙将作为侧切牙,第一双尖牙将作为尖牙。这允许在不使用骨整合种植体的情况下纠正错颌,同时重新建立微笑美观。上下中线重合,获得良好的咬合。正畸治疗后,患者接受牙周手术以改善牙龈边缘。随后进行了牙齿漂白,患者接受了六颗烤瓷贴面。对于严重外伤性牙齿缺失,正畸关闭间隙和修复联合治疗可能是最佳选择。