Traditional rapid palatal expansion methods are known to have side effects, including tooth tipping, a decrease in the thickness of the buccal bone, and a decrease in the height of the bone near the gums, which can result in receding gums.
The new methods used the mini-screw as a bone anchorage. We used 15 classical implants and 15 thread length, thread pitch and diameter, thus turns implant surface design, insertion mode, as well as the correlations of these features with stability mini implant. They were analized two types of rate stability mini implants by measuring the tensile force with a traction machine and the kind of tensions that occur during orthodontic request. The insertion angle of the TADs can be optimized with a proper evaluation of palate bone morphology, preferably through the use of CBCT scans.
The most reliable types of orthodontic mini-implants are cylindrical-conical screw-type , with the optimal size of between 8-10 millimeters, one step thread ranging from 0.75 mm 0.80. Using orthodontic implants as temporary anchorage devices (TDA) has revolutionized the biomechanical orthodontic treatment planning, eliminating the problem of losing orthodontic anchorage.
Key words : CBCT, MARPE, mini-screw, orthodontics, expansion
