Tanaka Orlando Motohiro, Fornazari Isabelle Adad, Parra Ariane Ximenes Graciano, de Castilhos Bruno Borges, Franco Ademir
Graduate Dentistry Program in Orthodontics, Pontifícia Universidade Católica do Paraná, Rua Imaculada Conceição 1155, 80215-901 Curitiba, PR, Brazil; Postdoctoral Fellowship at The Center for Advanced Dental Education, Saint Louis University, St. Louis, MO, USA.
Dentistry, Pontifícia Universidade Católica do Paraná, Curitiba, PR, Brazil.
Case Rep Dent. 2016;2016:8306397. doi: 10.1155/2016/8306397. Epub 2016 Apr 28.
This case report presents the interceptive orthodontic treatment of a boy, aged 8 years 4 months with a Class I malocclusion with severe transverse maxillary deficiency and complete maxillary crossbite and correction using Haas expansion and fixed appliance. The treatment goals were to correct the posterior crossbite and anterior crossbite and restore the normality of the dentition and occlusion. In phase I, the patient was treated with a modified Haas-type palatal expander, which provided a clinically significant palatal expansion and increased the maxillary arch perimeter with favorable conditions for orthodontic treatment with fixed appliances in phase II. The optimization of E-space and the use of intermaxillary Class III elastics helped to maintain the mandibular incisors upright. A removable wraparound type appliance and a bonded lingual canine-to-canine retainer were used as retention. Although the literature has reported a high rate of relapse after palatal expansion, after 2 years 9 months of posttreatment follow-up, the occlusal result was stable and no skeletal reversals could be detected.
本病例报告介绍了一名8岁4个月的男孩的阻断性正畸治疗，该男孩为I类错牙合，伴有严重的上颌横向发育不足和完全性上颌反牙合，采用哈斯扩弓器和固定矫治器进行矫正。治疗目标是纠正后牙反牙合和前牙反牙合，恢复牙列和咬合的正常状态。在第一阶段，患者使用改良型哈斯式腭扩弓器进行治疗，该扩弓器实现了临床上显著的腭部扩展，并增加了上颌牙弓周长，为第二阶段使用固定矫治器进行正畸治疗创造了有利条件。优化E空间并使用III类颌间弹力牵引有助于保持下颌切牙直立。使用可摘式环绕型矫治器和粘结式舌侧尖牙间保持器进行保持。尽管文献报道腭部扩弓后复发率较高，但在治疗后2年9个月的随访中，咬合结果稳定，未发现骨骼复发。
