Apical extrusion of intracanal biofilm using ProTaper Gold, WaveOne Gold,Twisted File Adaptive, OneShape New Generation and K3XF

Abstract

Objective: To evaluate the bacterial extrusion during instrumentation with different nickel titanium (NiTi) engine-driven instruments. Methods: Ninety extracted single-canal human mandibular incisor teeth were inoculated with Enterococcus faecalis to obtain biofilm formation and were randomly divided to 6 groups (n=15). One group served as the control and was not instrumented; the other groups were prepared with ProTaper Gold (PTG; Dentsply Maillefer, Ballaigues, Switzerland), WaveOne Gold (WOG; Dentsply Maillefer), Twisted File Adaptive (TFA; SybronEndo, Orange, CA, USA), One Shape New Generation (OSNG; MicroMega, Besancon, France), and K3XF (SybronEndo) instruments. Bacteria extruded beyond the apical foramen were quantified in colony-forming units per milliliter. The number of colony-forming units in the remaining biofilm was determined for each sample. Data were analyzed using the one-way analysis of variance (ANOVA) and Tukey post-hoc tests. Results: All NiTi instruments resulted in different quantities of bacterial extrusion. The TFA group caused most bacterial extrusion (p<0.05). The PTG and WOG groups caused less bacterial extrusion than the OSNG and K3XF groups (p<0.05), but there was no statistically significant difference between the PTG and WOG groups (p>0.05). Conclusion: PTG and WOG are preferable system in terms of successful endodontic treatments. The amount of bacterial extrusion is associated with the metallurgy and design of the instrument used.

Canal straightening following overinstrumentation with three nickel-titanium rotary instruments

“…[ 5 6 ] The newer fifth generation of NiTi rotatry systems, including ProTaper Next ® (PTN Dentsply Maillefer, Ballaigues, Switzerland), BT Race ® (BTR FKG, La Chaux-de-Fonds, Switzerland), and WaveOne Gold ® (WOG Dentsply Maillefer, Ballaigues, Switzerland), has increased flexibility and improved resistance to cyclic fatigue. [ 7 8 9 ] PTN ® instruments manufactured from M-wire alloy have an innovative off-centered rectangular cross section that allows a snake-like continuous movement as they advance in the canal. [ 10 ] The WOG ® reciprocating file was developed as a single-file technique with post-manufacturing gold process in which the ground NiTi file is heat-treated and slowly cooled.…”

Comparison of Postoperative Pain Levels after Root Canal Instrumentation with Two Rotary Nickel Titanium Instruments (An In-Vivo Study)

“…This came in agreement with Kumar et al whom found ProTaper Gold group to cause less post endodontic pain compared to other groups in their studies 12 . The less post endodontic pain associated with ProTaper Gold could be attributed to less debris extrusion due to the file flexibility and the noncutting tip design 13 . Both file systems used in this study were heat treated to produce a more flexible wire compared to the conventional super elastic NiTi systems.…”

Impact of different instruments metallurgy on Apical extrusion of debris and fracture resistance: A comparative invitro study

“…Reciprocal motions were associated with less debris extrusion than continuous rotation, according to Üstün et al [28] and Arslan et al [29] , which could be explained by kinematics because reciprocating motion is a type of automatized balanced-force pressureless technique that is thought to have better control of apically extruded debris [30] . Furthermore, the properties of WOG minimise the bulk of the tip's centre and contribute to less debris extrusion [31] , whereas Bürklein et al [32] and Küçükyilmaz et al [33] discovered that rotary instrumentation caused less debris extrusion than reciprocal instrumentation. This difference could be due to the method of debris collection used, the type of tooth used, and/or the instrumentation used.…”