Headgears/ dental implant courses by Indian dental academy

Force systems with cervical headgear. OB (Outer bow)-A lies along the LFO and therefore only vertical and horizontal forces will be produced no M. The position of OB-B will produce an extrusive F posterior F and counterclockwise M since it is above CR. Outer bows located below the LFO will produce posterior forces and smaller extrusive forces since they are closer vertically to the neckstrap and clockwise moments. www.indiandentalacademy.com