Lingual bonded wire to retain the incisor position
First, a hard or a braided wire is bent onto the lingual or palatal surfaces of the teeth from canine to canine or first premolar to first premolar.
Afterwards, the tooth surfaces which are to be bonded are isolated (isolation agent/Dentaurum or Aislar/ Kulzer) and a drop of a fluid light-curing bonding (e.g. Con Tec LCR/Dentaurum, Flowline/ Kulzer or Tetric-flow) is placed on each of the oral surfaces from canine to canine or first premolar to first premolar.
In the second step, the previously adapted retainer wire is set into these bonding drops and adapted as closely to the oral tooth surfaces as possible. Now the bonding is light cured with a UV lamp.
Afterwards, another modeling of the bonding spots is made with a more solid light-curing resin (ConTec LC/Dentaurum, Durafill/Kulzer or Tetric) to form small bonding bases. These are light cured again.
To manufacture the Transfer tray, a fluid silicone impression material (of a two phase material e.g. LinguSil/Dentaurum) is injected around the wire of the retainer.
Afterwards, the polimerized fluid silicone material is covered with kneadable silicone (Lutesil/ Bisico) and formed into shape using the fingers.
The solid silicone should cover the incisal edges labially. After the silicone is cured, the cast with the silicone key is hydrated during approximately 10 minutes so that the silicone key can be removed from the cast.
Now the transfer key is removed from the cast. In the area of the wire, the silicone material has to be cut open with a scalpel to ensure an easy removal of the key intraorally after bonding.
Finally, the grease of the bonding bases of this silicone key has to be removed with acetone and cotton pellets.
