Connecting wire for the lingual shield 1.2 mm spring hard, labial bow 0.8 mm spring hard, ball clasp, headgear hook 0.8 mm hard
Function:
Mandibular advancement
Description:
Combined with a headgear the upper jaw is restricted in its growth
Ball clasps are used in the buccal area. The wire diameter can vary according to the tooth dimension. The retentions have to be designed according to the reduced base plate. The hooks for the extraoral traction are located between the upper lateral incisor and the canine.
The lingual shield is positioned along the inner alveolar curve and reaches into the area of the first premolar. The support wire of the lingual shield is fixed firmly into the upper plate. The reactivation of this appliance occurs by activating the wire which emerges out of the upper base plate towards the front.
The upper base plate reaches slightly under the gingival margin in the posterior region. In the anterior region, the incisors are not covered on the palatal side, they rest with their incisal edge on a plateau which simultaneously supports the lower incisors. The plateau covers all teeth. For this appliance a construction bite is needed.
