Effectiveness and Cleaning Ability of Orange Oil Solvent Coupled with Rotary Versus Manual Instruments During Endodontic Retreatment Procedure. (An In-Vitro study)

Document Type : Original Article

Authors

1 Associate Professor, Endodontics, Faculty of Dentistry, Minia University, Egypt

2 Department of endodontic, Faculty of dentistry, Minia university, El-minia, Egypt

3 Endodontics, Faculty of Dentistry ,Al Minya University, Al Minya, Egypt

Abstract

The objective of this study is to assess and compare the effectiveness and cleaning capability of Hedstrom manual files, Pro-Taper and Mtwo retreatment instruments in retreatment of single rooted teeth with and without orange oil as solvent. Forty- two teeth with single root were extracted, decoronated, and shaped up to file 45 and sealed with gutta percha and resin sealer utilizing lateral condensation technique. The teeth were split into six equal groups (n=7) depending on retreatment procedure. Pro-Taper, Mtwo retreatment files, and H-files were applied to eliminate the gutta percha with and without orange oil gutta percha solvent after two weeks. Retreatment time was calculated using stopwatch. The quantity of root filler material remaining in the apical, middle, and coronal thirds was assessed utilizing a scanning electron microscope at 1000X magnification. Retreatment time was evaluated via one-way ANOVA accompanied by the post hoc test. Cleaning ability scores were analyzed using two-way cumulative link mixed models and simple effects comparisons. Pro-Taper retreatment files combined with solvent was significantly the fastest method for complete retreatment procedure. Substantial variation was identified between the examined groups for cleaning ability in different canal thirds(p<0.001). The highest cleaning scores in apical third was found in group (V), among middle and cervical thirds the highest cleaning score was found in group (I). Overall, the study indicating better debridement were associated with rotary systems used without solvents, particularly Pro-Taper retreatment files. The use of solvents, while beneficial in softening gutta-percha, did not consistently translate into improved cleaning outcomes.

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Egyptian Dental Journal
Volume 71, Issue 4 - Serial Number 5
Conservative Dentistry and Endodontics
October 2025
Pages 3507-3517

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