The SKEL activator according to Ruhland type III-c
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-c Instead of the spring bows between the upper and lower jaw, a prognathism screw (LS-Duobloc- Screw) was installed. Through this screw a more uniform distal activation of the lower part is possible.
The acrylic is added in one process by means of a dividing metal plate. In order to install the prognathism screw parallel, a metal pattern is needed for their installation.
The SKEL activator type III-c according to Ruhland works through the bilateral activation of the lower screws which move the base of the lower jaw distally against the base of the upper jaw.
