Instruments Used in Root Canal Shaping

Stainless steel and nickel titanium.

Nickel-titanium instruments have no advantage over stainless steel in irregular canal spaces.

Hand files are used to determine canal length and to open the first path in the canal.

<p>An apex locator or X-rays can be used to determine canal length.</p> Signup and view all the answers

<p>An endoblock is a ruler used to measure canal length millimetrically with canal files.</p> Signup and view all the answers

<p>An endometer ring is worn on the finger for measurement purposes.</p> Signup and view all the answers

<p>All instruments must be sterilized before each treatment to prevent infection.</p> Signup and view all the answers

<p>An endobox is used for arranging and storing canal files sterilely.</p> Signup and view all the answers

<p>Carbon steel instruments can cut more efficiently than stainless steel but are more susceptible to corrosion.</p> Signup and view all the answers

<p>Changing the cross-sectional design and decreasing flute numbers increases flexibility but may reduce cutting efficiency, especially with nickel-titanium files.</p> Signup and view all the answers

<p>Hand-operated instruments are available in 21, 25, and 31 mm lengths, with shorter instruments providing improved control and access to posterior teeth.</p> Signup and view all the answers

<p>The tip angle of approximately 75 degrees is designed for cutting efficiency while minimizing sharp transitions that can damage the canal.</p> Signup and view all the answers

<p>D0 represents the diameter at the tip of the instrument, while D16 refers to the diameter at the end of the cutting blade, essential for assessing instrument effectiveness.</p> Signup and view all the answers

<p>Nickel-titanium wire offers greater flexibility than traditional metals, allowing for better navigation in curved canals.</p> Signup and view all the answers

<p>Hand-operated instruments are produced with specific size and shape requirements, yet do not exhibit consistent standards across manufacturers.</p> Signup and view all the answers

<p>Engine-driven configurations help to leverage the flexibility of nickel-titanium files while addressing reduced cutting efficiency during clinical use.</p> Signup and view all the answers

<p>The instrument should be discarded immediately to prevent separation.</p> Signup and view all the answers

<p>A barbed broach has a thinner handle and no taper, with barbs that entangle canal contents.</p> Signup and view all the answers

<p>Aggressive use may cause fracturing of the instrument.</p> Signup and view all the answers

<p>Single barbed broaches should be available in presterilized bubble packaging.</p> Signup and view all the answers

<p>Their primary purpose is to remove residual pieces, such as cotton fibers, from the canal.</p> Signup and view all the answers

<p>It can lead to decreased effectiveness and increase the risk of instrument separation.</p> Signup and view all the answers

<p>This process creates barbs that can effectively entangle and remove canal contents.</p> Signup and view all the answers

<p>They are no longer recommended for pulp removal due to potential complications.</p> Signup and view all the answers

<p>It allows for better canal shaping and adaptability to different canal sizes.</p> Signup and view all the answers

<p>Protaper universal and Wave One Gold.</p> Signup and view all the answers

<p>To prevent the risk of infection and ensure patient safety.</p> Signup and view all the answers

<p>They are used to facilitate the removal of old gutta-percha from canals.</p> Signup and view all the answers

<p>Smaller instruments (less than size 20) can endure more rotations without breaking compared to larger instruments (greater than size 40).</p> Signup and view all the answers

<p>It refers to the maximum rotational torque that can be applied before an instrument separates.</p> Signup and view all the answers

<p>Guttasolv and chloroform are examples of solvents used.</p> Signup and view all the answers

<p>There is no difference in torsional strength, but machined files tend to fail with less visible deformation.</p> Signup and view all the answers

<p>The symbol on a Reamer file is triangle-shaped because it is made from triangular-shaped wire.</p> Signup and view all the answers

<p>C-Pilot files are designed to navigate curved or blocked canals due to their high bending power from a special thermal hardening process.</p> Signup and view all the answers

<p>C Plus files do not have symbols; instead, their size is indicated on the side, and they have pyramid-shaped tips.</p> Signup and view all the answers

<p>Edta gel/cream should not remain in the canal for more than 1 minute to avoid perforation.</p> Signup and view all the answers

<p>Edta gel/cream serves as an inorganic tissue solvent used to assist in opening calcified canals.</p> Signup and view all the answers

<p>The order is K file, Reamer, and H file from top to bottom.</p> Signup and view all the answers

<p>C-Pilot files are essential because they can effectively navigate and reach the working length in curved and blocked canal systems.</p> Signup and view all the answers

<p>C-Pilot files are available in lengths such as 19, 21, and 25 mm.</p> Signup and view all the answers