E2 Classification of Appliances

• passive

• active

• functional

• fixed

• removal

• fixed/removal

doesn’t use force

• maintain appliance in the mouth

• hold teeth in place, inhibiting any movement

use placement of forces

• forces placed on a single teeth or groups of teeth

• forces are generated within the appliance and specific oral structures to be corrected

use muscles of mastication and the oral cavities to crate conditions which will encourage the growth or change

• changes are not necessarily tooth movement, but rather changes to the supporting structures.

• doesn’t use screw or springs to make changes, use positioning and stretching of muscles to produce that are required

appliance that cannot be removed by the patient

• Most common fixed appliances use molar bands

• Could be distorted or damaged when removed

Rely on cemented bands for retention, but include attachments which allow the body of the appliance to be removed from the mouth without damage to the appliance

Can be removed by the patient at any time

• Held in by retention, such as, clasp, suction, or acrylic placement

Hawley Retainer

• removal

• passive

• use acrylic

Wrap Retainer

• removal

• passive

• use acrylic

Spring Retainer

• removal

• active

• use acrylic

Schwarz

• removal

• active

• use screw

• use acrylic

Transverse

• removal

• active

• use screw

• use acrylic

Quad-Helix

• Fixed

• fixed/removal

• active

Hyrax

• fixed

• active

• use screw

Bonded Hyrax/Expander

• fixed

• active

• use screw

• use acrylic

Haas

• fixed

• active

• use screw

• use acrylic

Activator

• removal

• functional

• can use screw

• use acrylic

Bionator

• removal

• functional

• can use screw

• use acrylic

Frankel

• removal

• functional

• can use screw

• use acrylic

Twin Block

• removal

• functional

• can use screw

• use acrylic

Herbst

• fixed

• functional

Nance

• Fixed

• fixed/removal

• passive

• use acrylic

Nord

• removal

• active

• use screw

• use acrylic

Gelb

• removal

• functional

• use acrylic

Band and Coil Regainer

• Fixed

• active

• use open coil

Band and Loop

• fixed

• passive

Lab Bent Lingual Arch

• fixed/removal

• passive

Solder Lingual Arch

• fixed

• passive

3X3 Retainer

• fixed

• passive

Active Vertical Corrector

• removal

• functional

• Use screw

• use acrylic

Trans Palatal Arch

• fixed

• Fixed/removable

• passive - no loop

• active - loop

Tooth Postioner

• removal

• active

Porter or aka W arch

• fixed

• active

Jackson

• removal

• active

• use acrylic

Crozat

• removal

• active

Rickets

• removable

• passive

• Use acrylic

Arnold

• fixed

• active

• open coil

Coffin

• removal

• active

• Use acrylic

Hayrake

• fixed

• Fixed/removable

• Passive

Tongue Crib

• fixed

• Fixed/removable

• Passive