Slide 2:
Transpalatal bar Burstone I geometry Lingual side Labial root torque Lingual root torque II Class Desired movements:
Extrusion on II Class side, Intrusion on Class I side I Class
Slide 3:
Inserting transpalatal bar I Class
Slide 4:
Moment generated by extrusive force Forces and moments inserting the bar
on Class I side II Class I Class
Slide 5:
Moment generated by intrusive force Forces and moments inserting the bar on Class II side II Class I Class
Slide 6:
Wilson curve worsen, lateral guidance angle
lower on II Class side Forces and moments SUM
on lingual side II Class I Class
Slide 7:
Burstone I geometry
Labial side Labial root torque Lingual root torque II Class I Class
Slide 8:
Inserting the wire II Class I Class
Slide 9:
Forces and moments inserting the wire on II Class side II Class I Class Moment generated by intrusive force
Slide 10:
Forces and moments inserting the wire on I Class side II Class I Class Moment generated by extrusive force
Slide 11:
+ = + = lucagiusepperusso@gmail.com II Class I Class