SELF LIGATION www.speedsystem.com 7 The SPEED Appliance employs a Super-Elastic Spring Clip to entrap and interact with the archwire. Unlike elastomeric ligatures the Spring Clip provides a constant corrective force that will not degrade with time. The mutual action of the SPEED Spring Clip and archwire extends the range of appliance activation, reducing both patient visits and treatment duration. SPEED provides patients and clinicians with the ultimate in 3-Dimensional control. The SPEED Spring Clip is activated upon archwire engagement. Once deflected by the wire, the SPEED Spring Clip provides the corrective forces which ensure “full” tip, torque and rotational control. This occurs through the corrective reorientation of the bracket and accompanying tooth. Any subsequent deviation from the ideal is corrected through the reactivation of SPEED's unique energy-storing Spring Clip. SPEED Spring Clip activated by archwire SPEED Spring Clip expressing stored energy Precise tooth positioning complete The SPEED Envelope of Action Note: • The dent in his left index finger • The torsional deflection of the spring • The alignment of the band with the archwire after release • How far the band has moved away from his thumb. These kinematics have considerable clinical significance. How does the SPEED Appliance work? This experiment by Dr. Hanson in 1970 revealed that a relatively primitive and largely hand-made SPEED bracket prototype could propel itself through an arc of 30° relative to a rigid wire.
RkJQdWJsaXNoZXIy Nzg3Njc4