Open Spring Retainer (Upper)
This appliance is useful in opening the arch to correct tongue posture, anterior minor rotations,
flared out, or crowded teeth. the retainer includes a labial helical and lingual spring with labial-lingual acrylic pads, a palatal wire with an omega loop, and a choice of clasp. When worn by the patient, the force produced by the labial-lingual will align the teech.
