The SKEL activator according to Ruhland type III-a
Elements:
For class II-1 – II-2: Labial arch 0.9 mm spring hard, Coffin spring 0.9 mm spring hard, occlusal molar rests 0.8 mm spring hard, occlusal rests canine 0.7 mm spring hard, protrusion spring 0.7 mm spring hard For class III: Labial arch 0.9 mm spring hard, Coffin spring 1.1 mm spring hard, lingual bow 0.9 mm spring hard, connection spring 0.9 mm spring hard
Function:
A reduced elastic activator with different tasks for class II-1, II-2 and III
Description:
A reduced elastic activator
Type III-a The appliance for class III is horizontally divided. Two distal spring bows connect the upper and lower part.
The elements in the lower jaw are two holding thorns and a connecting bow. The upper jaw consists of protrusion springs, an intermaxillary bow and a Coffin spring. First, both parts, upper and lower, are finished separately. Interocclusal acrylic is not necessary. With a construction bite, the upper and lower parts are connected in the articulator through spring bows in the distal part of the plates.
Through activation of the intermaxillary bow and both spring bows the lower jaw is retruded.
