Palatal Orthodontic Implant
Acta Universitatis Tamperensis, No. 1519
By Roland Mannchen
Tampere University Press
Distributed By Coronet Books
$82.50 Paper Original
Temporary anchorage devices (TAD), fixed to bone, have been gaining increasing importance in orthodontics in the last 15 years. They are independent of the patient?s compliance, overcome some of the limits of classical anchorage devices and expand the orthodontic treatment possibilities. But only very little is known about the healing process after insertion, success and survival rates, risk factors, adequate handling and biomechanics and, as a consequence, indications and limits of the different TADs used nowadays.
The aim of the series of studies was to examine these different aspects of the palatal orthodontic implant as one representative of contemporary TADs and to compare them to other TADs.
It could be shown that the palatal orthodontic implant has a high long-time success rate. It is a stable and reliable tool for absolute anchorage, can tolerate significant moment application and is therefore indicated for major tooth movements and movements of the whole dental arch in the upper jaw, whereas miniplates are the system of choice in the lower jaw. Miniscrews are only indicated for minor tooth movements, as the odds ratio with multiple screw placement is too poor, especially in the mandible. The onplant is obsolete as the palatal implant is more reliable and easier to handle.
Nevertheless, classical anchorage strategies are usually preferable in growing children, as TADs have no influence on the skeletal growth pattern except for autorotations of the mandible due to vertical manipulations of the posterior teeth.
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