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What material is a flex file made from?
Plastic
Ceramic
Stainless steel or nickel titanium alloy
Aluminum
The correct answer is: Stainless steel or nickel titanium alloy
A flex file is primarily made from stainless steel or nickel-titanium alloy due to the special properties these materials possess that are essential for endodontic procedures. Stainless steel offers durability and strength, making it a reliable choice for instruments used in root canal treatments. On the other hand, nickel-titanium alloy provides excellent flexibility, allowing the file to navigate the complex anatomy of root canals without breaking. This flexibility is crucial for effectively removing debris and shaping the canal in a way that minimizes trauma to the surrounding tissue. The choice of material directly impacts the performance and outcome of endodontic treatments, which is why stainless steel and nickel-titanium alloy are preferred for flex files.