Comparison between direct vs indirect anchorage in two miniscrew-supported distalizing devices

Area of Science:

• Orthodontics
• Dental Biomaterials
• Craniofacial Growth

Background:

• Class II malocclusion is a common dental anomaly requiring effective treatment strategies.
• Palatal miniscrews offer skeletal anchorage for orthodontic tooth movement.
• Distalizing appliances aim to correct molar relationships in Class II cases.

Purpose of the Study:

• To compare the efficacy of the MGBM System and the Distal Screw appliance for maxillary molar distalization.
• To evaluate treatment time and specific tooth movements associated with each device.

Main Methods:

• A comparative study of 53 Class II patients using either the MGBM System or the Distal Screw appliance.
• Lateral cephalograms analyzed pretreatment and postdistalization.
• Statistical comparison using Student's t-test.

Main Results:

• MGBM System resulted in significantly greater maxillary first molar distalization (5.5 mm vs. 3.2 mm).
• MGBM System achieved distalization in a shorter mean treatment time (6 months vs. 9 months).
• MGBM System showed increased distal molar tipping (10.3° vs. 3.0°), while DS exhibited distal premolar movement.

Conclusions:

• The MGBM System is more efficient for molar distalization due to greater movement and reduced treatment duration.
• The Distal Screw appliance offers a potential advantage by minimizing molar tipping during distalization.