Debris extrusion by glide-path establishing endodontic instruments with different geometries

Abstract

Background/purpose Glide-path preparation is an important step during initial endodontic procedure to reduce shaping-instrument fracture. The aim of this study was to evaluate the amount of apically extruded debris produced by glide-path preparation instruments with different geometric designs. Materials and methods Forty teeth extracted for periodontal reasons were randomly divided into four groups ( n = 10). The working length was standardized at 17 mm from the apical foramen by a flattening reference point. The glide-path was created using repetitive up-and-down movement three times with one of following four selected instruments: One G, ProGlider, a size 15 ScoutRace, and a size 15 stainless-steel K-file. To collect the apically extruded debris, the customized apparatus was used, and the collected debris was stored in an incubator. The weight of the debris was measured using an analytical balance with an accuracy of 0.00001 g. The data were analyzed by one-way analysis of variance and Duncan's multiple comparison test at a significance level of 95%. Results The ProGlider group produced significantly less debris extrusion relative to the other groups (P < 0.05). The One G and ScoutRace groups showed no significant difference, but debris production was lower than that observed for the stainless-steel group (P < 0.05). Conclusion Creating the glide-path using nickel-titanium rotary files produced lower amounts of debris extrusion than using manual stainless-steel files. The progressive taper design of ProGlider, the center-off cross-section of One G, and the alternative-pitch design of ScoutRace may have increased the efficiencies of debris removal with minimal extrusion during glide-path preparation. Glide-path preparation using NiTi rotary files have better clinical efficiency than the manual stainless-steel file.

Cyclic fatigue resistance of R‐Pilot, HyFlex EDM and PathFile nickel‐titanium glide path files in artificial canals with double (S‐shaped) curvature

“…), greater amounts of apically extruded debris (Ha et al . ), greater incidence of postoperative pain and slower symptom resolution (Pasqualini et al . ).…”

“…The creation of glide path can be affected by the degree of canal curvature, and the experience of the operator (De-Deus et al 2013). In addition, it is also difficult and time-consuming to create a glide path using manual files; they might also cause more canal transportation (Pasqualini et al 2012a), less centred canal preparations (Alovisi et al 2017), greater amounts of apically extruded debris (Ha et al 2016), greater incidence of postoperative pain and slower symptom resolution (Pasqualini et al 2012b). For this reason, the creation of glide paths using rotary NiTi files is recommended for achieving more predictable results, especially in curved canals (Alovisi et al 2017).…”

Intraoperative Pain During Glide Path Creation with the Use of a Rotary or Reciprocating System

“…Thus, when compared to the reciprocal systems, the rotary systems have the advantage of the decrease in postoperative complications by enabling the removal of lower amount of debris from the apical. 25 In previous studies 18,26 reported that the ProGlider had the least extrusion of debris among the other rotary NiTi instrument groups. They analysed the geometric differences resulted in the difference of debris extrusion.…”

Postoperative pain after glide path preparation using manual, reciprocating and continuous rotary instruments: a randomized clinical trial

“…Previous laboratory studies have reported that manual glide path preparation may extrude greater amounts of debris and bacteria compared to mechanical glide path preparation using NiTi instruments (Ha et al . , Dagna et al . ).…”

“…The results of the present study are in accordance with the findings of Pasqualini et al (2012) regarding the lower incidence of postoperative pain after glide path preparation with NiTi rotary instruments, since glide path preparation using both reciprocating and rotating NiTi instruments led to significantly less postoperative pain incidence than in the manual group. Previous laboratory studies have reported that manual glide path preparation may extrude greater amounts of debris and bacteria compared to mechanical glide path preparation using NiTi instruments (Ha et al 2016, Dagna et al 2017. A linear filing motion creates a greater amount of debris than rotational instrumentation techniques (Al-Omari & Dummer 1995).…”