There are many designs of ELSAA. The images and text describe one design.
ELSAA (Expansion Labial Segment Aligning Appliance) components shown: -
Labial Bow 3 / 3 in 0.8mm S.S wire.
Occlusal rests 6 / 6 in 0.9mm S.S wire and 4 / 4 in 0.8mm S.S wire.
Recurved springs 3 / 3 in 0.8mm S.S wire.
Adams clasps 6 / 6 in 0.8mm S.S wire and 4 / 4 in 0.7mm S.S wire.
Mid-line expansion screw.
Further reading: - Functional Appliances in Orthodontic Treatment (an atlas of clinical and laboratory construction) - Harry. S. Orton. ISBN - 1-85097-012-2.
