[A perspective on the use of bone anchorage as opposed to other types of anchorage techniques].

Introduction: To convert our objectives into the desired treatment results, we need to control our mechanics and thus the anchorage used by avoiding any unwanted movements. It now seems unthinkable, at the dawn of the 21 century, to ignore the useful contribution of orthodontic screw-borne anchorage. Nevertheless, we are entitled to raise a number of legitimate questions.

The time needed to refit an orthodontic wire: influence of the attachments.

In this prospective clinical study, we assessed the relative speed with which archwires can be changed by comparing self-ligating brackets with classical methods using elastomeric and metal ties, as well as the impact of the stage of orthodontic treatment. The main judgement criterion was the time required to place orthodontic archwires with different cross-sections, alloys and compositions, using two types of brackets, conventional twin-tie and self-ligating. Placement time was recorded 10 times for each procedure by three operators experienced in the use of self-ligating bracket clips.