It refers to the method by which a rectangulararchwire is inserted into the bracket on the edge.

It was discovered in 1925 by Dr.Edward H. Angle.

The wire is inserted into the bracket with thenarrow diamention placed occluso-gingivally.

This mode of insertion of the wire is calllededgewise and therefore the techniqe was callededgewise technique.

Uses:

Control of tooth movement

Gaining space

Bracket slot-0.022 ″×0.028″ with single ordouble tie-wings.

Slot projects horizontally from the base of thebracket.

Bonded and welded brackets are available.

Maxillary central incisor:3.5mm from theincisal edge to the bracket base

Maxillary lateral incisor:3mm from the incisaledge to the bracket base

Maxillary cuspids:4.5mm from the incisal edgeto the bracket base

Maxillary bicuspids:3.5mm from the buccalcusp tip to the bracket base

Maxillary molars:middle third of the crown

Mandibular incisors:2.5mm from the incisaledge to the bracket base

Mandibular cuspids:3.5mm from the incisaledge to the bracket base

Mandibular bicuspids:3mm from the buccalcusp tip to the bracket base

Mandibular molars:middle third of the crown

All brackets were centered mesiodistally onbuccal surfaces of the teeth.

1ststep:its made in the horizontal plane oflabial and buccal contour of teeth.

2nd step:made in vertical plane

Uses:

o mesial distal inclination

o uprightening of teeth

o elevation and depressing of teeth

o Anchorage preparation

o paralleing of roots of certain teeth

3rdstep:bends used to the tip of the crowns orroots labially or lingually or buccally placedby twisting the archwire

Diameter of the wire:0.012″×0.020″or0.016″×0.016″to 0.018″×0.018″ squarewings

maxillary and mandibular cuspid retraction usingopen coil springs loops headgears to augmentanchorage

For mandibular incisors:0.019″×0.026″ archwirewith closing loop

Using tip back bands in the buccal segment on a0.019″×0.026″ archwire

bodily rectraction with special helicalclosing loops in 0.0215″×0.0285″ archwire

Move teeth in all 3 planes

Good control over tooth movement

Precise finishing is possible

Bodily tooth movement is possible

Forces were used heavy so the incidence of patient discomfort and root resorption

Complex wire bending

Difficulty to open deep bite

Increase friction between archwire and the bracket