Cutting Efficiency of Conventional and Martensitic Nickel-Titanium Instruments for Coronal Flaring

Behavior of Nickel-Titanium Instruments Manufactured with Different Thermal Treatments

“…This indicates that TYP is easy to insert in the artificial canal probably because it presents an efficient cutting ability. This has been previously demonstrated (33) during evaluation of the influence of rotational speed and the number of uses on the cutting efficiency of NiTi coronal flaring in which Hyflex CM instruments (controlled memory technology) presented the highest cutting efficiency. However, further work may be necessary to clarify those issues because different methodologies and instruments with distinct dimensional characteristics do not allow accurate comparisons.…”

Lateral and axial cutting efficiency of instruments manufactured with conventional nickel‐titanium and novel gold metallurgy

“…One calibrated examiner assessed all the images as described previously (Morgental et al . , Peters et al . ).…”

“…, Morgental et al . ). The form of analysis of these substrates also varies, for example weight loss (Vinothkumar et al .…”

“…Axial cutting was quantified by measuring penetration depth in standardized artificial root canals (Schäfer & Oitzinger ), and lateral cutting was tested by pushing instruments laterally towards the substrate (Morgental et al . , Plotino et al . ).…”

Constant Insertion Rate Methodology for Measuring Torque and Apical Force in 3 Nickel-Titanium Instruments with Different Cross-sectional Designs

“…However, this parameter is difficult to measure, and several different techniques have been used, attempting to develop reproducible and reliable methods for its determination (2)(3)(4)(5). Among these, there are methods in which the cutting efficiency is measured by weighing the amount of material cut by the instrument (6,7), evaluating the wear depth in acrylic plates using profilometry (4,5,8,9), or using micro-computed tomographic imaging (10). However, there is no consensus regarding the most adequate criteria to assess the cutting efficiency of endodontic instruments.…”