Reciproc Versus Twisted File for Root Canal Filling Removal: Assessment of Apically Extruded Debris

Abstract

Purpose:The aim of this study was to evaluate the amount of apically extruded debris during endodontic retreatment with different file systems. Materials and Methods:Sixty extracted human mandibular premolar teeth were used in this study. Root canals of the teeth were instrumented and filled before being randomly assigned to three groups. Guttapercha was removed using the Reciproc system, the Twisted File system (TF), and Hedström-files (H-file). Apically extruded debris was collected and dried in pre-weighed Eppendorf tubes. The amount of extruded debris was assessed with an electronic balance. Data were statistically analyzed using one-way ANOVA, Kruskal-Wallis, and Mann-Whitney U tests. Results:The Reciproc and TF systems extruded significantly less debris than the H-file (p<0.05). However, no significant difference was found between the Reciproc and TF systems.Conclusion:All tested file systems caused apical extrusion of debris. Both the rotary file (TF) and the reciprocating single-file (Reciproc) systems were associated with less apical extrusion compared with the H-file.

Revisión de desobturación de gutapercha con limas manuales, Xilol y Reciproc

“…Numerous studies show that Reciproc was more resistant compared to other continuous and alternating systems. The difference, grouped as per mean time of fracture, was longer for the Reciproc system compared to WaveOne by 45.6 seconds (14) . Other studies also found that Reciproc had better resistance to flexural fatigue because of its cross section, to the angles and speed of reciprocation (35) .…”

“…Several studies support the resistance of Reciproc (14,17,(42)(43)45) and agree it has greater cyclic fatigue , . Contrary to the results obtained by Ozyurek et al (14) , they compared the resistance to cyclic fatigue of WaveOne, WaveOne Gold and Reciproc, and concluded that WaveOne Gold showed greater resistance to cyclic fatigue. In a study conducted by Topcuoglu et al (54) Reciproc presented greater resistance to cyclic fatigue than WaveOne in apical curvatures, but not in the cervical third.…”

“…As for torsional resistance, relevant studies have determined that reciprocating files have better resistance, while others conclude that there were no significant differences between Reciproc and WaveOne (14,17,45) . In this clinical case we irrigated the root canal with 5.25% sodium hypochlorite.…”

“…Biofilm must be removed to control the infection (12) . Retreatment is a nonsurgical therapeutic option for an endodontic failure (13)(14) . Nonsurgical endodontic retreatment is performed to remove material from the root canal space in order to correct deficiencies or repair pathological or iatrogenic defects, followed by cleaning, shaping and three-dimensional obturation (6,9,15) .…”

“…However, this percentage is lower for retreatments (18) . Nonsurgical endodontic retreatment is necessary when microbial infection persists for initial treatments with deficient preparation, untreated canals, underfilling, crown filtration due to lack of marginal seal, deficient irrigation protocols, altered biosafety circuits, among other causes (13)(14) . Gutta-percha (GP) has been used in endodontic therapy as filling material for over 100 years and remains the material of choice today (13) .…”