In vitro study of effect of solvent on root canal retreatment

Oyama, Kazumi Onaga Nagayama; Siqueira, Evandro Luiz; Santos, Marcelo dos

doi:10.1590/s0103-64402002000300014

Cited by 65 publications

(64 citation statements)

References 11 publications

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“…Therefore, orange oil would be a suitable alternative solvent to promote gutta-percha dissolution compared with potentially toxic solvents such as xylol. 21 Further, the use of orange oil in endodontics is increasing because of its safety, biocompatibility, and non-carcinogenicity. 22 Although the solvents facilitated filling removal of the material, they also probably contributed to creating a residual filling layer on the canal walls 11 which affected the penetration of the sealer into the dentinal tubules after retreatment, reducing its bond strength in the intraradicular dentin.…”

Section: A B C Dmentioning

confidence: 99%

Influence of solvents on the bond strength of resin sealer to intraradicular dentin after retreatment

et al. 2017

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Influence of solvents on the bond strength of resin sealer to intraradicular dentin after retreatment Abstract: This study evaluated the removal of filling material with ProTaper Universal Rotary Retreatment system (PTR) combined with solvents and the influence of solvents on the bond strength (PBS) of sealer to intraradicular dentin after canal reobturation. Roots were endodontically treated and distributed to five groups (n = 12). The control group was not retreated. In the four experimental groups, canals were retreated with PTR alone or in combination with xylol, orange oil, and eucalyptol. After filling material removal, two specimens of each group were analysed by SEM and µCT to verify the presence of filling remnants on root canal walls. The other roots were reobturated and sectioned in 1-mm-thick dentin slices that were subjected to the push-out test. Data were analysed by two-way ANOVA and Tukey's test (α = 0.05). SEM and µCT analysis revealed that all retreatment techniques left filling remnants on canal walls. The control group (3.47 ± 1.21) presented significantly higher (p < 0.05) PBS than the experimental groups. The groups retreated with PTR alone (2.59 ± 0.99) or combined with xylol (2.54 ± 0.77) and orange oil (2.32 ± 0.93) presented similar bond strength (p > 0.05), and differed significantly from the group with eucalyptol (1.89 ± 0.63). The solvents reduced the PBS of the sealer to dentin and no retreatment technique promoted complete removal of filling material.

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Section: A B C Dmentioning

confidence: 99%

Influence of solvents on the bond strength of resin sealer to intraradicular dentin after retreatment

et al. 2017

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“…7,9,10,11 Xylol is an organic solvent that has the capacity to solubilize endodontic sealers, including epoxy resin-based sealer. 12,13 It is routinely used in endodontic retreatment techniques, including manual and rotatory approaches, for removing obturation material from the root canal.…”

Section: Declaration Of Interestsmentioning

confidence: 99%

Effect of the time-point of acid etching on the persistence of sealer residues after using different dental cleaning protocols

et al. 2016

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Endodontic sealer residues remaining within the pulp chamber dentin after root canal obturation and cleaning with various solvents may compromise the appearance and the durability of dental restorations. Acid etching is routinely performed prior to application of dentine adhesive systems, but is effect on residual sealer material and the optimal time-point for performing etching, are unknown. Here, we evaluated the effect of acid etching on the dentin surface when performed either immediately or 7 days after removal of the endodontic sealer with two solvents, i.e., 95% ethanol or xylol. Forty crowns fragments from bovine incisors were impregnated with sealer and divided into 4 groups (n = 10 each), according to the dentin cleaning protocol and to the acid etching time-point: G1, 95.0% ethanol and immediate acid etching; G2, xylol and immediate acid etching; G3, 95.0% ethanol and acid etching after 7 days; and G4, xylol and acid etching after 7 days. Scanning electron microscopy (SEM) images (2000 ×) were obtained from each specimen and the number of open dentinal tubules counted and compared. Another 40 fragments were similarly prepared, and SEM images were obtained (500 ×) to score and compare the persistence of sealer residues on the dentin. G4 showed the most open dentinal tubules and the least epoxy resin-based sealer residues on the dentin surface (p < 0.05). The least epoxy resin-based sealer residues was obtained when acid etching, using 37% phosphoric acid, was performed after 7 days after cleaning the dentin with xylol.

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“…19 Orange peel oil is excellent to dissolve gutta-percha compared to other potentially toxic solvents. 20 In fact, the use of essential oils in Endodontics has increased because they are proven to be safe, biocompatible and noncarcinogenic. 21 For this reason, gutta-percha was removed with orange peel oil in the present clinical case.…”

Section: Discussionmentioning

confidence: 99%

Endodontic reintervention with MTA apical plug: a case report

Virgens¹,

Silva²,

Pereira³

et al. 2015

Dental Press Endod

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Introduction: Chemical-mechanical preparation is of crucial importance to a successful endodontic treatment. Endodontic reintervention is indicated in cases of failure and unsuccessful outcomes. In this phase, teeth with external apical resorption require excellent care by the practitioner. In order to overcome these challenges, a biomaterial known as MTA (Mineral Trioxide Aggregate) was incorporated to the world dental market, presenting several indications, such as its use as apical plug. Objective: To report a clinical case of endodontic reintervention with indication of MTA apical plug. Case report: A Caucasian female patient reported sensitivity to palpation and presence of fistula for more than 15 days. Gingivitis and fistula were clinically observed at the bottom of the buccal sac of tooth #21. Radiographically, previous endodontic treatment was poor, presenting intraradicular metal core, external root resorption, and rarefying osteitis limited to the periapical region. Endodontic reintervention of tooth #21 was carried out. Treatment involved three visits for removal of the temporary crown, cast metal core and gutta-percha, in addition to application of intracanal dressing and the use of a MTA apical plug, as well as the application of warm gutta-percha. Thereafter, the patient was referred for definitive rehabilitating treatment. Conclusion: Clinical and radiographic follow-up after eight years revealed periapical repair and re-establishment of masticatory and esthetical functions by means of restorative procedure. Treatment was proven to be efficient in sealing the apical region of the root canal through the use of MTA apical plug; thus, showing the success and advantages of both material and therapeutic modality.

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In vitro study of effect of solvent on root canal retreatment

Cited by 65 publications

References 11 publications

Influence of solvents on the bond strength of resin sealer to intraradicular dentin after retreatment

Influence of solvents on the bond strength of resin sealer to intraradicular dentin after retreatment

Effect of the time-point of acid etching on the persistence of sealer residues after using different dental cleaning protocols

Endodontic reintervention with MTA apical plug: a case report

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