• Ligature wires:
• They are soft stainless steel
wires of 0.009 to 0.011’’
diameter.
• They are used to secure the
arch wire to brackets.
• Elastic ligature rings are also
used for ligation,they are
available in various colors.
• Lock pins :
• They are small pins usually
made of brass or soft steel.
• They are used to secure the
arch wire to brackets with
vertical slots.
Archwire
• They are one of the active components of fixed appliances.
• They can bring about various tooth movements through the medium of brackets
and buccal tubes.
• Classification of arch wires:
• Based on material used:
•
1. gold and gold alloys
•
2. stainless steel
•
3. nickel titanium alloys
•
4. beta titanium
•
5. cobalt chromium nickel alloys
•
6. optiflex arch wires
• Based on cross section:
•
1. Round
•
2. Square
•
3. Rectangular
•
4. Multistranded
Comparison of archwires
• A Rectangular arch wire is
used
• The arch wire is round
austenitic stainless steel
wire.
• Dimension : 0.022’’x0.028’
• Dimension: 0.016 inch
diameter
• The basic archwire is
formed on an edgewise
former using Bonwill
Hawley chart.
• This arch wire was
produced by A.J.Wilcock of
Victoria.