Effects of Different Rotary Files Combined with Different Irrigation Needles on Apically Extruded Debris

Abstract

<p>The aim of this study was to compare the apically extruded debris associated with ProTaper Next and OneShape Apical files using two different irrigation needles, open-ended and closed-ended (Max-I-Probe). Forty-eight mandibular premolars were assigned to four groups (n=12) as follows: Group PTN-SN: Root canal was prepared with ProTaper Next (PTN) and irrigated with open-ended standard needle; Group PTN-MP: Root canal was prepared with PTN and irrigated with Max-I-Probe; Group OSA-SN: Root canal was prepared with OneShape Apical (OSA) and irrigated with open-ended needle; Group OSA-MP: Root canal was prepared with OSA and irrigated with Max-I-Probe. Debris extruded during instrumentation was collected into pre-weighed Eppendorf tubes. After storage in an incubator at 70 °C for 5 days, the Eppendorf tubes were weighed to obtain the final weight with extruded debris. The difference between pre-and post-debris weights was calculated and statistical analysis was performed using Kruskal-Wallis and Mann-Whitney U tests (p<0.05). No statistically significant difference was observed between files and needles regarding amount of apically extruded debris (p>0.05). OneShape Apical and ProTaper Next resulted in extrusion of debris beyond the apical foramen, regardless of needle tip.</p>

Evaluation of Post-Operative Pain After Irrigation Using End-Vented Navitip Tips Versus Side-Vented Navitip Tips in Teeth With Irreversible Pulpitis: A Randomized Clinical Trial Part Vi.

“…However, there was no statistically significant difference in the pain levels between both groups at all the post-operative time points, this was in agreement with Uzunoglu et al (2015) (28) who reported no difference in the apical extrusion but in contrast to Altundasar et al (2011) (7) who reported higher apical extrusion by the end-vented needle than the side-vented needle.…”

Evaluation of Post-operative Pain after Irrigation Using End-Vented NaviTip Tips versus Side-Vented NaviTip Tips in Teeth with Irreversible Pulpitis: A Randomized Clinical Trial.

“…However, this was in contrast with the results of Uzunoglu et al (2015) (28) who reported no difference in the apical extrusion between end-vented and side-vented needles, this may be due to using the needles at a greater distance from the apex.…”

Apical Extrusion of Debris and Irrigants Using Different Irrigation Needles

“…Most in vitro extrusion studies do not attempt to simulate adjacent vital pulp or periapical tissues (3,14,15). Yet, these tissues act as a natural barrier preventing or diminishing debris extrusion and therefore, such results should not be directly extrapolated at the dental clinic.…”

“…Root canal irrigation is an important part of canal preparation for the removal of bacteria, debris and necrotic tissue, especially from root canal areas previously untouched by instrumentation (1). In an irrigant is not used, no significant debris extrusion occurs, but during root canal irrigation there is considerable extrusion of material (2,3). Debris extrusion depends on several factors, including the apical anatomy, type and size of the irrigation needle, needle placement depth, apical preparation size and taper, and the instrumentation technique (4).…”