HOSA Dental Terminology Practice

What material are intracanal instruments commonly made of?

1. Stainless steel only

2. Nickel titanium alloy wire only

3. Plastic and rubber

4. Stainless steel and nickel titanium alloy wire

The correct answer is: Stainless steel and nickel titanium alloy wire

Intracanal instruments are primarily designed for use in root canal therapy, where their effective flexibility, strength, and resistance to corrosion are crucial. The correct answer indicates that these instruments are commonly made from both stainless steel and nickel titanium alloy wire. Stainless steel is widely recognized for its durability and ability to withstand sterilization processes, making it a staple in many dental instruments. Its rigidity allows practitioners to effectively navigate the root canal system. On the other hand, nickel titanium alloy is known for its unique properties, such as increased flexibility and the ability to return to its original shape after deformation, which is essential for following the often curved anatomy of root canals. This combination of materials allows for the creation of instruments that can handle a variety of clinical situations, combining the benefits of both rigidity and flexibility. In contrast, the other options do not accurately represent the use of materials in intracanal instruments. For instance, the use of solely stainless steel or nickel titanium alloy wire would overlook the advantages of using both materials together, as each contributes uniquely to the performance of the instruments. Additionally, while plastic and rubber may have their place in dentistry, they lack the properties necessary for the strength and flexibility required during the demands of endodontic procedures, making them less