Three-dimensional evaluation of hybrid expander appliances: A pilot study

Area of Science:

• Orthodontics
• Craniofacial Development
• Dental Technology

Background:

• Maxillary hypoplasia often requires orthopedic expansion.
• Traditional rapid maxillary expansion can lead to undesirable dental side effects.
• Hybrid expanders offer a bone-anchored alternative for skeletal expansion.

Purpose of the Study:

• To evaluate transverse dimensional changes in dentoalveolar and skeletal structures using a hybrid expander.
• To assess the efficacy of the hybrid expander in rapid maxillary expansion (RME).
• To analyze skeletal and dental effects via cone-beam computed tomography (CBCT).

Main Methods:

• CBCT scans of nine patients (mean age 13.61 years) treated with a hybrid expander were analyzed.
• Measurements of 19 transverse dimensions and 4 angles were taken pre- and post-expansion.
• Statistical analysis using the Wilcoxon signed rank test was performed (P < .05).

Main Results:

• Successful V-shaped maxillary suture expansion was achieved in all patients without significant tooth tipping.
• An average of 8.75 mm of screw expansion was accomplished.
• Expansion effects were observed in the anterior and inferior regions, with significant transmission to posterior teeth.

Conclusions:

• The hybrid expander is an effective, minimally invasive appliance for rapid maxillary expansion.
• It provides skeletal anchorage, minimizing dental side effects.
• This appliance facilitates efficient treatment of transverse maxillary deficiency.