IADR Abstract Archives

ASSESSMENT OF ARCH LENGTH CHANGES FOLLOWED BY SLOW MAXILLARY EXPANSION

Background & Aim: After palatal expansion for posterior crossbite correction, arch width will change but there is contraversy regarding arch length changes. The aim of this study is to determine arch length changes after crossbite correction by removable appliance (with screw) in 9-14 years old patients in Shahid Behshti University in 1386.

Materials & Methods: In this experimental study, 10 patients (5girls and 5 boys) were chosen. These patients were treated by removable appliance (with screw). Dental casts were made before and after treatment. Anterior arch length (Distance between Midline to the line that connected Canine tips) and posterior arch length (Distance between midline to the line that connected first Molars central Fossa) determined before and after treatment by digital pliers. The data were evaluated by paired t-test.

Results: The mean difference between pre-treatment and post treatment Ant. Arch length was 0.6^mm ± 0.69^mm (significant) and their correlation coefficient was 0.983. The mean difference between pretreatment and post treatment posterior arch length was: 1.3^mm ± 0.48^mm (significant) and their correlation coefficient were 0.987.

Conclusion: According to our results, removable appliances used for maxillary transverse expansion, also can increase arch length and so. They can be used for mild to moderate crowding correction or mild reverse overjet treatment.

Division: Iranian Division Meeting
Meeting: 2008 Iranian Division Meeting (Evin, Iran)
Location: Evin, Iran
Year: 2008
Final Presentation ID: 0094
Abstract Category|Abstract Category(s): 2008 Abstracts

Authors

Vahiddastjerdi E,

Amini N,

SESSION INFORMATION

Oral and Poster Presentations