Materials Used In Orthodontics Question And Answers

Materials Used in Orthodontics

Write a short note on 18:8 stainless steel wire.
Or
Write a short note on 18–8 stainless steel.
Or
Write a short answer on stainless steel wire.
Or
Write a short answer on 18:8 stainless steel.
Answer. Austenitic stainless steel wire is referred to as 18:8 stainless steel wire.

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• It is used to make orthodontic archwires.
• This wire is most corrosion resistant and hence widely used in dentistry.
• Both 302 and 304 Austenitic stainless steel are often called 18-8 stainless steel.
• Type 302 austenite is the basic alloy, which contains 17–20% chromium, 8–12% nickel, and a maximum of 0.15% carbon.
• Type 304 also has a similar composition, but the carbon content is 0.08%.
• Type 316 L (low carbon) contains 16–18% chromium and 10-14% nickel. 0.03% carbon and is used for making implants.
• These wires have adequate strength, resilience, formability, and adequate springback. They are biocompatible and economical.

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