| 摘要 |
<p>Self ligating orthodontic brackets include a bracket base and a flexible ligation cover to provide dynamic active ligation of the arch wire during tooth realignment. A bearing protrucion (238) extends from the underside of the cover (234) so as to partially extend into an arch wire slot (233) within the base (232) when the cover (234) is in a closed position relative to the base (232). The resilient flexibility of the cover (234) permits it to flex upwardly to absorb mechanical energy from the arch wire (240). The resilient of the cover (234) allows it to return to its original configuration as the arch wire (240) becomes more fully seated with the slot (233) as a result of realignment of a tooth, thereby maintaining contact with the arch wire (240) to provide dynamic active ligation.</p> |
