[Arch perimeter changes on non-extraction correction of dental crowding with Damon appliance].

Purpose: To clarify the arch perimeter changes and the mechanism of Damon technique on the correction of dental crowding with non-extraction approach in different dental stages.

Methods: 24 patients with non-extraction Damon appliance treatment were reviewed. They had Class I skeletal pattern and upper arch crowding more than 5mm.

[A comparison of rapid palatal expansion and Damon appliance on non-extraction correction of dental crowding].

Purpose: To compare the effect of rapid palatal expansion (RPE) and Damon technique on the correction of dental crowding with non-extraction approach.

Methods: 19 adolescent patients with non-extraction orthodontic treatment were reviewed. They had Class I skeletal pattern and moderate crowding.

[The clinical implication of self-ligating brackets].

The self-ligating bracket is a new kind of bracket. The cardinal feature of a self-ligating bracket is an inbuilt metal labial face to the bracket slot, which is referred to as a clip or slide. It reduces the chairside time and makes the ligating easier.