Gianolio A, Cherchi C, Lanteri V
Private practitioner, Cagliari, Italy.
Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, Department of Biomedical, Surgical and Dental Sciences, Unit of Orthodontics and Paediatric Dentistry, School of Dentistry, University of Milan, Milan, Italy.
Eur J Paediatr Dent. 2014 Dec;15(4):415-8.
The purpose of this study was to evaluate and compare the dental and orthopaedic effects of rapid and slow maxillary expansion in a sample of young patients with transversal maxillary deficiency by using a postero-anterior cephalometric analysis.
Two groups of patients were considered: 10 patients (3 males, 7 females) with an average age of 8.9 years were treated with a rapid maxillary expansor (RME); 10 patients (7 males, 3 females) with an average age of 12.2 years were treated with a new slow maxillary expansion appliance (ELA). Postero-anterior cephalometric analyses were made at the beginning of the therapy (T0) and at the end of expansion (T1) using a computerised cephalometric programme. Four parameters were measured: Nasal width, maxillary width, mandibular width, upper molars width.
Transversal average width increased 5.435 mm (SD 3.31 mm) between the upper molars in the RME group and 5.547 mm (SD 3.49 mm) in the SME group. Maxillary average width increased 4.254 mm in the first group and 2.845 mm in SME group. Discussion An orthopaedic result was reached with both treatments. These results are in agreement with the orthodontic literature.
This work confirms the effectiveness, efficiency and usefulness of this new ELA appliance in the correction of transversal deficiency with orthopaedic results, if used in growing patients.
本研究旨在通过头影测量分析，评估和比较快速上颌扩弓和慢速上颌扩弓对一组横向上颌骨发育不足的年轻患者的牙齿和骨骼的影响。
研究对象分为两组：10例患者（3例男性，7例女性），平均年龄8.9岁，采用快速上颌扩弓器（RME）进行治疗；10例患者（7例男性，3例女性），平均年龄12.2岁，采用新型慢速上颌扩弓矫治器（ELA）进行治疗。在治疗开始时（T0）和扩弓结束时（T1），使用计算机化头影测量程序进行正位头影测量分析。测量四个参数：鼻宽、上颌宽度、下颌宽度、上颌磨牙宽度。
RME组上颌磨牙间横向平均宽度增加5.435mm（标准差3.31mm），SME组增加5.547mm（标准差3.49mm）。第一组上颌平均宽度增加4.254mm，SME组增加2.845mm。讨论两种治疗方法均取得了骨骼方面的效果。这些结果与正畸学文献一致。
本研究证实了新型ELA矫治器在生长发育期患者中矫正横向发育不足并取得骨骼效果方面的有效性、高效性和实用性。
