Rapid and slow maxillary expansion: a posteroanterior cephalometric study

Area of Science:

• Dentistry
• Orthodontics
• Craniofacial development

Background:

• Transversal maxillary deficiency is a common condition in growing patients.
• Maxillary expansion is a key orthodontic treatment to address this deficiency.
• Comparing different expansion methods is crucial for optimizing treatment outcomes.

Purpose of the Study:

• To compare the dental and orthopedic effects of rapid maxillary expansion (RME) versus a new slow maxillary expansion appliance (ELA).
• To evaluate treatment outcomes using postero-anterior cephalometric analysis in young patients.

Main Methods:

• Two groups of patients with transversal maxillary deficiency were studied: one treated with RME (n=10) and another with ELA (n=10).
• Patients' average ages were 8.9 years for RME and 12.2 years for ELA.
• Postero-anterior cephalometric analysis measured nasal width, maxillary width, mandibular width, and upper molars width before and after treatment.

Main Results:

• Both RME and ELA groups showed significant increases in transversal width.
• Upper molar width increased by approximately 5.5 mm in both groups.
• Maxillary width increased more with RME (4.25 mm) compared to ELA (2.85 mm), indicating differential effects.

Conclusions:

• Both rapid and slow maxillary expansion achieve orthopedic correction for transversal maxillary deficiency.
• The new ELA appliance is confirmed as effective, efficient, and useful for treating growing patients.
• The study highlights the successful orthopedic outcomes achievable with both expansion modalities.