Abstract
Classical anchorage like in Tweed Edgewise and Begg technique all includes tip back bends on molars. With the development of straight wire appliance, especially the wide spread of NiTi wire that makes bending tip backs impractical if not impossible, orthodontists then gradually discard tip back bend and look for other anchorage methods. We then see a lot of TPA, Nance bar, headgear, and more and more TAD. Our recent study showed the conventional headgear can’t prevent upper molar from forward tipping on straight wire technique probably because it can’t resist 24 hours tip forward moment exerted by a straight wire on conventional molar tube when the dental arch was not straight before treatment. TAD is absolute anchorage; it won’t yield at all when pitting with other teeth. Then we see a lot of alveolar defects or root resorption of anterior teeth especially with the application of CBCT imaging technology. The emergence of TAD represents the end of the time of ever looking for stronger anchorage and meanwhile the advent of a new time of looking for more individualized and more physiologic anchorage.
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Andrews LF (1972) The six keys to normal occlusion. Am J Orthod 62(3):296–309
Mulligan TF (1982) Common sense mechanics. 2122 East Kaler Drive, Phoenix, AZ 85020
Burstone CJ, Koenig HA (1974) Force systems from an ideal arch. Am J Orthod 65(3):270–289
Xu TM, Zhang X, Oh HS et al (2010) Randomized clinical trial comparing control of maxillary anchorage with 2 retraction techniques. Am J Orthod Dentofacial Orthop 138(5):544.e1–9
Martinelli FL, de Oliveira Ruellas AC, de Lima EM, Bolognese AM (2010) Natural changes of the maxillary first molars in adolescents with skeletal Class II malocclusion. Am J Orthod Dentofacial Orthop 137(6):775–781
Tweed CH (1966) Clinical orthodontics. Mosby, St. Louis
Xu TM (2015) New concept of physiologic anchorage control. APOS Trends Orthod 5:250–254
Acknowledgment
The work was supported, in part, by National Natural Science Foundation of China No. 81371192.
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Xu, T.M. (2017). Paradigm Shift by Straight Wire Appliance and Its Impact on Anchorage Control. In: Xu, T. (eds) Physiologic Anchorage Control. Springer, Cham. https://doi.org/10.1007/978-3-319-48333-7_2
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DOI: https://doi.org/10.1007/978-3-319-48333-7_2
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