Page 127 - REMOVABLE ORTHODONTIC APPLIANCES

Appendix 3

Recommended wire diameters

Retention Roberts' retractor 0.5 mm in 0.5 mm
ID tubing
Posterior Apron spring 0.5 mm wound on
high labial bow
Adams' clasps 6|6 0.7 mm of 0.9 mm
Adams' clasps 4|4 0.6 mm Self-straightening wires 0.5 mm on labial
Clasp to engage molar tubes 616 0.7 mm bow 0.7 mm
Adams' clasps dc and did 0.6 mm Buccal canine retractor a) Self supporting
0.7 mm
b) Supported
Anterior 0.5 mm in
0.5 mm ID
Double Adams' clasp Ul 0.7 mm tubing
Southend clasp 0.7 mm Self-supporting buccal
Fitted labial bow 21|12 0.7 mm spring to move canines
'c' clasp 0.6 mm and premolars palatally 0.7 mm

Active components Palatal
Cantilever spring to retract canines
Buccal
and premolars 0.5 mm
Low labial bow 0.7 mm Double cantilever ('Z") spring 0.5 mm
Reverse loop labial bow 0.7 mm 'T' spring 0.5 mm
Extended labial bow 0.7 mm Coffin spring 1.25 mm