Restor Dent Endod.  2020 Aug;45(3):e33. 10.5395/rde.2020.45.e33.

Effects of the endodontic access cavity on apical debris extrusion during root canal preparation using different single-file systems

• Tüfenkçi P
• Yılmaz K
• Adigüzel M

• KMID: 2512024
• DOI: http://doi.org/10.5395/rde.2020.45.e33

Abstract

Objectives
This study was conducted to evaluate the effects of traditional and contracted endodontic cavity (TEC and CEC) preparation with the use of Reciproc Blue (RPC B) and One Curve (OC) single-file systems on the amount of apical debris extrusion in mandibular first molar root canals.
Materials and Methods
Eighty extracted mandibular first molar teeth were randomly assigned to 4 groups (n = 20) according to the endodontic access cavity shape and the single file system used for root canal preparation (reciprocating motion with the RCP B and rotary motion with the OC): TEC-RPC B, TEC-OC, CEC-RPC B, and CEC-OC. The apically extruded debris during preparation was collected in Eppendorf tubes. The amount of extruded debris was quantified by subtracting the weight of the empty tubes from the weight of the Eppendorf tubes containing the debris. Data were analyzed using 1-way analysis of variance with the Tukey post hoc test. The level of significance was set at p < 0.05.
Results
The CEC-RPC B group showed more apical debris extrusion than the TEC-OC and CEC-OC groups (p < 0.05). There were no statistically significant differences in the amount of apical debris extrusion among the TEC-OC, CEC-OC, and TEC-RPC B groups.
Conclusions
RPC B caused more apical debris extrusion in the CEC groups than did the OC single-file system. Therefore, it is suggested that the RPC B file should be used carefully in teeth with a CEC.

Keyword

Apical extrusion; Endodontic cavity; One Curve; Reciproc Blue

Figure

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  Figure 1 Diagrammatic representation of Schneider's method.

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  Figure 2 Photographs of mandibular first molars showing access outlines. (A) TEC. (B) CEC.TEC, traditional endodontic cavity; CEC, contracted endodontic cavity.

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  Figure 3 A schematic presentation of the test model.

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