Molar uprighting with mini screws: comparison among different systems and relative biomechanical analysis.
Starting from a segmented approach, the Authors propose 3 different methods of using mini screws during the process of molar uprighting. The first UPG is performed by placing a mini screw in the retromolar area and by applying an elastic chain loaded between the screw and the molar.The second UPG is made by placing a screw in the retro molar area and by using a small cantilever which is active during intrusion and uprighting.The third UPG is made by using a miniscrew placed a few millimeters mesial to the molar to control the vertical force produced by the uprighting with a long cantilever to the frontal teeth.To assist in the understanding of the different clinical indications, the biomechanical differences between these three systems are analyzed.
Musilli
Marino
M
marinomusilli@hotmail.com
Marsico
Marco
M
Romanucci
Annalisa
A
Grampone
Francesco
F
D001696:Biomechanical Phenomena; D001863:Bone Screws; D020724:Elastomers / Q000737:chemistry; D006801:Humans; D008963:Molar / Q000473:pathology*; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation* / Q000379:methods; D016382:Orthodontic Appliance Design; D009967:Orthodontic Appliances; D009969:Orthodontic Wires; D012399:Rotation; D013314:Stress, Mechanical; D013997:Time Factors; D014087:Tooth Movement Techniques / Q000295:instrumentation* / Q000379:methods; D019415:Torque
D020724:Elastomers