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Canal shaping of different single-file systems in curved root canals.

Authors :: D'Amario M
De Angelis F
Mancino M
Frascaria M
Capogreco M
D'Arcangelo C
Source :: Journal of dental sciences [J Dent Sci] 2017 Dec; Vol. 12 (4), pp. 328-332. Date of Electronic Publication: 2017 Apr 03.
Publication Year :: 2017
Abstract: Background/purpose: This study compared maintenance of canal anatomy, occurrence of apical transportation, and working time observed after instrumentation with One Shape New Generation rotary system (Micro-Mega), with those observed after instrumentation with Reciproc (VDW) and WaveOne (Dentsply-Maillefer) reciprocating systems.<br />Materials and Methods: The mesial canals of 45 mandibular molars (curvature angles between 35° and 45°) were selected. Specimens were randomly divided into three groups, and canal preparations were performed using One Shape, Reciproc, or WaveOne systems (size #25). A digital double radiographic technique was used to determine apical transportation and change in angle of curvature. Also, working time and instrument failures were recorded. Data were statistically analyzed.<br />Results: During preparation, no file fractured. No statistically significant differences were found among groups. No system showed a significantly faster preparation time than others (P > 0.05). All instruments maintained the original canal curvature well and were safe to use.<br />Conclusion: Both continuous rotary instrument and reciprocating systems did not have any influence on the presence of apical transportation or caused an alteration in angle of canal curvature.