This appliances allows us to apply expansion with minimizing the use of metal.

Schwartz: Is an acrylic plate with a midline screw placed in it to allow the two plates of acrylic to separate from each other from left to right this is a popular option for doctors who want to incorporate expansion into

Schwartz: Is an acrylic plate with a midline screw placed in it to allow the two plates of acrylic to separate from each other from left to right this is a popular option for doctors who do not like to use