Some of you have asked about using engagers or buttons with Zendura aligner to achieve difficult tooth movement in orthodontic treatment. (You can find our other article on using pliers to accomplish minor tooth movement.)
In some cases a tooth is shaped or positioned in a way that makes it hard for an aligner to apply the necessary force to complete the motion. Small composite-resin bumps can be placed on the surface of such teeth. These engagement points greatly help the aligner move the tooth. See the details below.
Why do you recommend intruding teeth by placing engagers on the adjacent teeth, instead of on the intruding tooth?
If you only place an engager on the tooth you're trying to intrude, there won't be anything holding the aligner securely in place. The aligner is likely to lift off of all the other teeth, instead of pushing the targeted tooth down. When you place engagers on the adjacent teeth, they hold the aligner in place, and the targeted tooth is pressed into the gums.
Try on the template.
Identify the location of all engagers.
Etch the tooth only in the area where engager will bond to the tooth. Do not etch the whole facial.
Rinse off acid.
Lightly coat engager voids with petroleum jelly.
Fill engager voids about 2/3 full with paste-type composite.
Fill remaining 1/3 of engager voids with flowable composite.
Place bonding agent on etched tooth.
Light cure bonding agent.
Light cure composite.
Remove template and clear off extra flashing material with scaler.