Testing force systems and biomechanics--measured tooth movements from differential moment closing loops.

摘要: Abstract Orthodontic tooth movement can be compared to a stimulus-response model, where the stimulus is applied force system and response resulting movement. Although principles of mechanics have been orthodontic appliance design, expression treatment responses systems less well known. The purpose this study was compare measured movements with theoretical exerted by differential moment closing loops. Sixteen subjects requiring maximum posterior anchorage control were selected participate in prospective investigation. T-loop springs designed deliver moment-to-force ratio vs anterior teeth used. Initial cephalometric radiographs taken special devices attached molar canine allow precise identification. Immediately after radiograph, archwires inserted activated. After an observation period approximately 90 days, the...