Abstract
Based on the physiologic characteristics of craniofacial growth, dentoalveolar compensation, and the function of posterior curve of Spee, combining with mechanism of differential moments and advantages of NiTi wire, a corresponding appliance has been developed to simplify the treatment mechanics with the very basic bracket structure. It composes of XBT buccal tube and MLF bracket. Combined with archwires with the curve of Spee, we try to follow physiologic features of dentition as much as possible and take advantage of it while doing orthodontic treatment. We call this new appliance Physiologic Anchorage Spee-wire System or PASS. The main difference between PASS and contemporary straight wire appliance (SWA) is that SWA’s prescription is based on optimal occlusion when occlusion development is completely finished, while PASS pays more attention to the dynamic process of occlusal development and dental compensation characteristics when jaw relationship is not optimal. The knowledge of how dentoalveolar compensation occurs will give orthodontists clues on how to retard it or even reverse it. A striking feature of this technique is that we try to keep the physiologic or compensated curve of Spee in posterior segment for function while straightening anterior teeth for esthetics.
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Xu, T.M. (2017). Physiologic Anchorage Control System. In: Xu, T. (eds) Physiologic Anchorage Control. Springer, Cham. https://doi.org/10.1007/978-3-319-48333-7_8
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DOI: https://doi.org/10.1007/978-3-319-48333-7_8
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