Expansion


Schwartz: Lower


The Schwarz appliance is utilized to achieve transverse expansion. The appliance standardly comes with a 7 millimeter activation screw. A single expansion screw is used to achieve expansion. Two pairs of clasp are added for retention. Labial bows can also be added if desired for additional retention. The occlusal surface is covered in acrylic to help displace the occlusion.




Schwartz: Upper


The Schwarz appliance is utilized to achieve transverse expansion. The appliance standardly comes with a 7 millimeter activation screw. A single expansion screw or two expansion screws can be used to achieve expansion. This is determined by the size of the arch. Two pairs of clasp are added for retention. Labial bows can also be added if desired for additional retention.




Fan Expander


The removable Fan expander allows for 7 millimeters of anterior expansion. The appliance has a hinge in the posterior to prevent the molars from expanding. There will be slight molar rotation. Most of the expansion will be in the anterior region. Occlusal coverage is standardly added to dislodge the occlusion. Two pairs of clasps are added for retention.




Nord Unilateral Expander


The Nord Unilateral Expander utilizes the same concept as a Schwarz appliance. However the acrylic is generally cut at the suture and then an angle cut is placed distal to the right or left cuspid. This is determined by which side of the arch you would like to expand. An Acrylic flange is then added to the opposite side of the arch extending to the lower posterior teeth. This allows for maximum anchorage.