Functional Appliances
8 products in this category
Frankel FR-I
Class II/1 with crowding. Standard buccal shields + lip pads + palatal bow. Promotes arch expansion via vestibular soft-tissue displacement.
Frankel FR-II
Class II/1 with large overjet + deep overbite. Adds anterior bite guide to FR-I design for simultaneous sagittal and vertical correction.
Frankel FR-III
Class III (mandibular prognathism / maxillary hypoplasia). Reverse configuration — upper lip pads advance the maxilla, lower buccal shields restrain mandibular growth.
Frankel FR-IV
Anterior open bite. Extended buccal shields for vertical control + bite blocks to prevent tongue thrust. Addresses the multifactorial etiology of open bite.
Twin Block
Two-piece removable appliance with 70° inclined bite blocks. Gold standard for Class II/1 in growing patients aged 8-14. Full-time wear including meals.
Herbst Appliance
Fixed bilateral telescopic tube-and-rod mechanism. 24/7 mandibular protrusion with zero compliance required.
Activator (Andresen)
One-piece acrylic monobloc. Nighttime wear. The original functional appliance with strong anchorage.
Bionator
Reduced-volume Activator with minimal palatal acrylic and coffin spring. Lightweight, suitable for daytime wear.