Eugenol Cement Research Articles

RETENTIVE STRENGTH OF CEMENTRETAINED IMPLANT-SUPPORTED FIXED DENTAL PROSTHESES ACCORDING TO DIFFERENT CEMENT TYPES AND CEMENTATION PROTOCOLS: AN IN VITRO STUDY.

To develop the most compatible cementation protocol for ensuring minimal residual cement and optimal retention of cement-retained implant-supported fixed dental prostheses. A total of 30 custom implant abutments and zirconia crowns with bilateral wings were prepared. Three cement types were used for cementation: noneugenol resin cement (Premier Implant Cement; Group IC), dual-polymerizing self-adhesive resin cement (SmartCem2; Group SC), and zinc oxide eugenol cement (Temp-Bond; Group TB; n = 30 per group). Three cementation methods were applied for each cement type, and the samples were divided into subgroups: (1) cement was injected using a graduated syringe (ICN, SC-N, and TB-N); (2) a cementa/on jig made with a silicone impression material and temporary resin material was used (IC-CJ, SC-CJ, and TB-CJ); (3) 3D-printed abutments were used as replicas for cementation (IC-3DP, SC-3DP, and TB-3DP). The amount of cement injected, surface area of the residual cement, and retentive strength were measured. Kruskal- Wallis and post-hoc Mann-Whitney tests were used for statistical analyses. Excess cement was not observed when cementa/on jig or 3D-printed replicas were used. For IC and SC subgroups, non-use of these auxiliary tools resulted in significantly higher amounts of injected cement. The retentive strength differed significantly among the IC subgroups but not among the SC subgroups. The retentive strength of subgroups TB-N and TB-CJ was significantly higher than that of subgroup TB-3DP. To prolong the main purpose of each cement type, a cementation jig or 3D-printed replica is highly recommended regardless of the cement type.

Evaluation of compressive strength, microhardness and solubility of zinc-oxide eugenol cement reinforced with E-glass fibers

BackgroundZinc-oxide eugenol (ZOE) cements are among the most used temporary materials in dentistry. Although ZOE has advantages over other temporary fillers, its mechanical strength is weaker, so researchers are working to improve it. E-glass fibers have emerged as promising reinforcing fibers in recent years due to their strong mechanical behavior, adequate bonding, and acceptable aesthetics.ObjectivesTo evaluate and compare the compressive strength, surface microhardness, and solubility of the ZOE and those reinforced with 10 wt.% E-glass fibers.MethodsA total of 60 ZEO specimens were prepared; 30 specimens were reinforced with 10 wt.% E-glass fibers, considered modified ZOE. The characterization of the E-glass fibers was performed by XRF, SEM, and PSD. The compressive strength, surface microhardness, and solubility were evaluated. Independent sample t-tests were used to statistically assess the data and compare mean values (P ≤ 0.05).ResultsThe results revealed that the modified ZOE showed a significantly higher mean value of compressive strength and surface microhardness while having a significantly lower mean value of solubility compared to unmodified ZOE (P ≤ 0.05).ConclusionThe modified ZOE with 10 wt.% E-glass fibers had the opportunity to be used as permanent filling materials.

Correlation between quality of obturation and outcome of pulpectomized primary molars following root canal instrumentation with pediatric rotary file systems

IntroductionThe success of root canal treatment is influenced by several factors including the type and technique of root canal preparation, the type of irrigants used, the quality of obturation, and post-endodontic restoration. Recent systematic reviews have concluded that there is no substantial evidence to establish the superiority of rotary file systems over hand files in terms of clinical and radiographic success in pulpectomized teeth. AimTo determine the correlation between quality of obturation and long-term outcome of pulpectomized primary molars following root canal instrumentation with pediatric rotary file systems and a hand file system. MethodsThe study involved 100 primary molars from children aged 4–7 years that required pulpectomy. The teeth were divided into four groups, each consisting of 25 teeth. In the first, second, third, and fourth groups, root canal instrumentation was carried out with Pedo-Flex pediatric rotary files (Group PF), Kedo-SG pediatric rotary files (Group KS), Pro-AF Baby Gold pediatric rotary files (Group BG), and hand nickel titanium K files (Group HF), respectively. Obturation was performed with zinc oxide eugenol cement using an engine-driven Lentulo-spiral. The quality of the root filling was assessed immediately after obturation through radiographic examination. The pulpectomized teeth were then evaluated both clinically and radiographically over a two-year period. ResultsThe quality of obturation was superior in the root canals instrumented with pediatric rotary file systems compared to hand files. At the end of follow-up period, the clinical success rate was 100% and the radiological success rates were 88%, 92%, 92%, and 80% in Groups PF, KS, BG, and HF, respectively. The optimally filled pulpectomized primary molars resulted in a superior success rate than compared to underfilled or overfilled teeth. ConclusionThe quality of obturation significantly influences the success rate of pulpectomized teeth. Therefore, the use of pediatric rotary files is recommended as rotary files contribute to a greater number of optimally filled canals.

Retracted: Minocycline plus Zinc Oxide Eugenol Cement Might Be A Promising Alternative for Acute Pulpitis.

[This retracts the article DOI: 10.1155/2022/4653602.].

Comparative evaluation of sealing ability of Zinc Oxide Eugenol and AH Plus sealers in laterally condensed gutta percha: A dye leakage study

Introduction: Airtight sealing of the root canal is the foremost desirable result of any root canal treatment, but getting the perfect filling of the root canal is always problematic, which could be due to multiple reasons. One such majorly reason impacting the obturation is the root canal sealer utilized. Objective: The present study was done for evaluating microleakage in zinc oxide eugenol cement (ZOE) and epoxy resin-based sealer (AH Plus) root canal sealers using linear dye leakage method. Methods: This in-vitro study used twenty-two extracted human single canal mandibular premolar teeth comprising 2 groups (11 in each), where sealers used for microleakage evaluation were ZOE cement sealer, and AH Plus. All the samples once cleaned, shaped and obturated were soaked in methylene blue dye for forty-eight hours with two millimeter (mm) exposed apex. The samples were then split into halves and inspected under a stereomicroscope for microleakage. The generated data were statistically analyzed using an independent t-test in SPSS version 11. Results: All the test samples showed microleakage. However, the mean microleakage measured was considerably higher in the ZOE cement sealer at 6.18mm and 2.95mm for the Epoxy resin-based sealer (AH Plus sealer). Conclusions: Epoxy resin-based sealer has better performance than ZOE cement sealer with minimal microleakage. Thus, Epoxy resin-based sealer showed a better prognosis and it can be considered to be adapted in clinical practice.

Comparison of physico-chemical properties of zinc oxide eugenol cement and a bioceramic sealer.

The aim of the present study was to compare the physico-chemical properties of EssenSeal with AH PLUS bioceramic and Pulp Canal Sealer EWT. Flow, solubility, film thickness, radiopacity and setting time were evaluated according to ISO 6876 (2012) specifications. External and cross-section surface characteristics were analysed under a scanning electron microscope. Statistical analysis was performed using Shapiro-Wilk's test, one-way ANOVA and the Tukey HSD test. All the sealers conformed to the ISO 6876 (2012) standards, except for the setting time for AH plus bioceramic, which exceeded more than 10% of the time indicated by the manufacturer. Statistically significant differences were found between the three study sealers regarding the physico-chemical properties tested (p < 0.05). EssenSeal demonstrated characteristics respecting the ISO 6876 (2012) standards and can be considered a predictable alternative in root canal sealing.

Minocycline plus Zinc Oxide Eugenol Cement Might Be A Promising Alternative for Acute Pulpitis.

Objective To investigate the clinical effect of minocycline plus zinc oxide eugenol cement in the treatment of acute pulpitis and its effect on the levels of HIF-1α, Bcl-2, and tumor necrosis factor α. Methods A total of 286 patients with acute pulpitis who were treated in our hospital from January 2019 to October 2020 were recruited and assigned (1 : 1) via random number table method to receive either minocycline (control group) or minocycline plus zinc oxide eugenol cement (study group). Outcome measures included treatment effect, tooth mobility, tooth percussion pain score, hypoxia-inducible factor (HIF)-1α and B-lymphocyte tumor (Bcl)-2 positive rate, and tumor necrosis factor (TNF-α). Results Minocycline plus zinc oxide eugenol cement was associated with significantly lower scores of teeth mobility and percussion pain versus minocycline alone (p < 0.05). Minocycline plus zinc oxide eugenol cement resulted in a significantly higher treatment efficacy (97.20%) versus minocycline alone (72.73%) (p < 0.05). Minocycline plus zinc oxide eugenol cement was associated with significantly lower positive rates of HIF-1α and Bcl-2 and lower levels of TNF-α versus minocycline alone (p < 0.05). The patients receiving minocycline plus zinc oxide eugenol cement showed significantly lower visual analogue scale (VAS) scores and faster pain relief versus those given minocycline alone (p < 0.05). Conclusion Minocycline plus zinc oxide eugenol cement offers a viable alternative for acute pulpitis as it mitigates the pain of patients, alleviates inflammatory responses, and lowers the positive rate of HIF-1α and Bcl-2, so it is worthy of clinical promotion.

Determination of correlation between the quality of obturation and postoperative pain following root canal preparation with rotary and manual file systems in the primary molars-A comparative randomized clinical trial

To determine the correlation between the quality of root canal obturation and postoperative pain following root canal preparation with rotary and manual file systems in the primary molars. A total of 150 primary molars requiring pulpectomy were selected from children aged 4–7 years. The selected teeth were divided into three groups: Kedo-S (KS), HERO Shapers (HS) and Manual Files (MF)-of 50 teeth each. In groups KS, HS, and MF, root canal instrumentation was carried out with Kedo-S pediatric rotary files, HERO Shaper rotary files, and manual NiTi K-files, respectively. Root canal obturation was carried out with zinc oxide eugenol cement using an engine-driven Lentulo spiral. The quality of the root filling was radiographically assessed immediately after obturation. The postoperative pain was evaluated at time intervals of 6, 12, 24, 48, 72 h, and 1 week. The quality of obturation was superior in the root canals instrumented with rotary file systems compared to manual files. There was decreased postoperative pain with the use of rotary file systems as compared to manual files. In all three groups, postoperative pain decreased over time. The use of rotary file systems resulted in a higher percentage of optimal root canal filling with lesser postoperative pain than the manual file system. The overfilled root canals were not associated with significant postoperative pain.

Determination of clinical efficiency of pediatric rotary file systems for root canal preparation in primary molars - A comparative study

Introduction: To meet the demand of pediatric endodontists, exclusive pediatric rotary file systems have been recently introduced by the manufactures. However, no study has been conducted to compare the clinical efficiency between pediatric rotary file systems. Aim: To determine the clinical efficiency (instrumentation time, obturation time, quality of obturation and postoperative pain) of two pediatric rotary file systems following the root canal preparation of primary molars. Materials and Methods: A total of 75 primary molars requiring pulpectomy were selected from children aged 4 to 7 years. These teeth were divided into three groups of 25 teeth each. In the first, second, and third groups, the cleaning and shaping of the root canals were carried out with Pedo-Flex pediatric rotary files (Group PF), Kedo-S pediatric rotary files (Group KS), and, manual nickel-titanium K-files (Group MF), respectively. Obturation was carried out with zinc oxide eugenol cement with an engine-driven Lentulo spiral. The instrumentation and obturation times were recorded. The quality of the root filling was radiographically assessed immediately after obturation. The postoperative pain was evaluated at time intervals of 6, 12, 24, 48, 72 h, and 1 week. Results and Discussion: The instrumentation and obturation times were significantly less with the use of pediatric rotary file systems compared to the manual file system. The quality of obturation was superior in the root canals instrumented with pediatric rotary file systems compared to manual files. There was decreased postoperative pain with the use of pediatric rotary file systems as compared to manual files. In all three groups, postoperative pain decreased over time. The optimally filled root canals showed a significant correlation with the absence of postoperative pain. Conclusions: The use of pediatric rotary file systems for root canal instrumentation of primary molars resulted in the superior quality of obturation in decreased instrumentation and obturating times with the least postoperative pain. The overfilled root canals were not associated with significant postoperative pain.

An In Vitro Trial to Estimate the Retention Ability of Luting Agents Utilized with Dental Implant-Supported Prosthesis.

Aim:The trial's goal was to assess the retentiveness of specially formulated implant cement besides comparing it to dental cements that are widely utilized by means of implant systems.Materials and Procedures:Twenty implant analogs were implanted in auto-polymerizing acrylic resin blocks and bonded to titanium abutments. Fifty uniform copings were waxed and cast unswervingly onto the abutment. (1) Resin-bonded zinc oxide eugenol cement, (2) purposefully designed implant cement, (3) zinc phosphate cement, (4) zinc polycarboxylate cement, and (5) glass ionomer cement were the cements used. Following cementation, each sample was pulled out by utilizing a widespread testing machine, and the stresses necessary to confiscate the crowns were recorded. The ANOVA and Bonferroni tests were used to examine the mean values and standard deviations of cement failure loads.Results:Zinc polycarboxylate cement had the peak mean cement failure load, followed by glass ionomer cement. Zinc phosphate cement had the next highest mean cement failure load, followed by resin-bonded zinc oxide eugenol cement. The mean cement failure load for Premier implant cement was the lowest. The difference in mean cement failure loads across the groups was statistically significant (P < 0.001).Conclusion:The findings do not imply that one type of cement is superior to another, but they do present a ranking directive of cements based on their capacity to maintain the prosthesis and facilitate retrievability.

Effect of abutment neck taper and cement types on the amount of remnant cement in cement-retained implant restorations: an in vitro study.

PURPOSEThe present study aims to analyze the effect of abutment neck taper and types of cement on the amount of undetected remnant cement of cement-retained implant prostheses.MATERIALS AND METHODSThree neck taper angles (53°, 65°, 77°) and three types of cement (RMGI: resin-modified glass ionomer, ZPC: zinc phosphate cement, ZOE: zinc oxide eugenol cement) were used. For each group, the surface percentage was measured using digital image and graphic editing software. The weight of before and after removing remnant cement from the abutment-crown assembly was measured using an electronic scale. Two-way ANOVA and Duncan & Scheffe’s test were used to compare the calculated surface percentage and weight of remnant cement (α = .05).RESULTSThere were significant differences in remnant cement surface percentage and weight according to neck taper angles (P < .05). However, there were no significant differences in remnant cement surface percentage and weight on types of cement. No interaction was found between neck taper angles and types of luting cement (P > .05). The wide abutment with a small neck taper angle showed the most significant amount of remnant cement. And the types of luting cement did not influence the amount of residual cement.CONCLUSIONTo remove excess cement better, the emergence profile of the crown should be straight to the neck taper of the abutment in cement-retained implant restoration.

Comparative Evaluation of Microleakage of Various Restorative Materials in Pulpotomized Primary Molars - In Vitro Study.

Background and Objectives:Conventionally, stainless steel crown (SSC) is the preferred material for the restoration of pulpotomized primary molars. However, in situations where stainless steel cannot be used necessity for other restorative material arises.Aim:The aim of this study is to assess the microleakage of several coronal seal materials in pulpotomized primary molars– in vitro.Methodology:Seventy-five primary molars were prepared with proximo-occlusal cavities. Restoration was done with Zinc oxide eugenol cement, SSC, composite resin, resin-modified glass-ionomer cement (GIC), and amalgam. Microleakage was assessed using dye penetration technique with stereomicroscope and scanning electron microscope.Statistical Analysis and Results:The Kruskal–Wallis and Mann–Whitney tests were used to statistically analyze the results.Conclusion:With regard to this present study composite resin and resin-modified GIC offers a good alternative for SSC.

The effect of different liners on the bond strength of a compomer to primary teeth dentine: in vitro study

Objective: This in vitro investigation should identify the effect of protective liners on dentine bond strength of a polyacid modified resin composite to dentine of primary teeth.Methods: Forty-two extracted caries-free primary molars were randomly assigned to seven groups (n = 6) and flattened. Six test groups were centrally covered with different protective liners/base materials: Kerr Life (KL), IRM zinc oxide eugenol cement (IRM), Ketac Bond (KB), Vitrebond (VB), Dycal (DY), and mineral trioxide aggregate (MTA). Specimens were bonded with Prime&Bond NT (PB) and restored with Dyract eXtra. The control group (C) did not receive liner pretreatment. After 24-h storage in Aqua dest. (37 °C), specimens were cut and regional microtensile bond strengths of the uncovered areas were tested. Fractography was conducted under a light microscope and further interface/surface analyses were performed under a SEM. Statistical appraisal was carried out using oneway ANOVA (mod. LSD test; p < 0.05).Results: Independent of the distance to the applied liner, all groups exhibited inferior μ-TBS to dentine of primary teeth compared to the control group (p < 0.05). The results were as follows in MPa(SD) x:significance level/percentage of adhesive fractures: PB: 34 (10)A/72%; KL: 23 (25)B/64%; KB: 15 (12)C/76%; DY 15 (13)C/55%; IRM: 14 (10)C/68%; VB: 12 (10)C/61%; MTA 12 (10)C/69%.Conclusions: Protective liners significantly reduced μ-TBS to dentine of primary teeth.

A randomized clinical trial of hyaluronic acid gel pulpotomy in primary molars with 1 year follow-up

Objective This randomized clinical study aimed to evaluate the success of hyaluronic acid (HA) as a pulpotomy medicament of human primary molars and to compare it with formocresol (FC) and ferric sulphate (FS) pulpotomy treatments up to 12 months. Materials and methods The study was conducted with 130 primary molars of 44 children. The ethical approval and registration to clinical trials (No: NCT04115358) were completed. After the removal of all the coronal pulp tissue, a 0.5% HA gel, or a FC, or a 20% FS solution were applied randomly to the radicular pulp tissues of the primary molars. Then, the pulp chambers were filled with a zinc oxide eugenol cement and restored either with a composite filling material or with a stainless-steel crown. The treatment success rates of the 3 groups were followed and compared clinically and radiographically at 1st-, 3rd-, 6th- and 12th-months. Results Primary molars treated with FC, FS and HA dressings were clinically successful 77.5%, 86.8% and 87.5% respectively after 12th-month follow-up (p > .05). Radiographic successes of FC, FS and HA groups were lower than clinical successes (57.6%, 68.8%, 57.9% respectively at the 12th-month) but the difference between the groups was not statistically significant (p > .05). Equivalence analysis assuming not more than 10% difference between the materials suggested that HA was not inferior to FC or FS. Conclusions Within the limitations of this study, our randomized clinical trial shows that HA is a promising pulpotomy medicament in primary molars. However, further studies are justified to further improve the HA material success.

Cone-beam Computed Tomographic Evaluation of the Quality of Obturation Using Different Pediatric Rotary File Systems in Primary Teeth.

Aim and objectiveTo compare and evaluate the efficacy of three different pediatric rotary file systems in primary molars using cone-beam computed tomography (CBCT).Materials and methodsThirty extracted mandibular primary molars were selected and divided into three groups with ten teeth each, instrumented with Kedo SG Blue rotary files, Pro AF Baby gold rotary files, and Pedo Flex rotary files, respectively. Root canal obturation was done with zinc-oxide eugenol cement and the quality of obturation was assessed using CBCT based on the extent of filling as underfilled or optimally filled and the presence or absence of voids within the filling. The data were statistically analyzed using the Chi-square test.ResultsAmong the three groups, the Kedo SG Blue group showed more number of optimally filled teeth with minimal voids (p < 0.05) followed by the Pro AF Baby gold group and Pedo Flex group.ConclusionWithin the study limitations, the Kedo SG Blue group showed ideal endodontic obturation when compared with Pro AF baby gold and Pedo Flex rotary file systems.Clinical significanceThe present study will guide the pedodontists regarding the efficacy of pediatric rotary file systems and their usage protocols.How to cite this articleVaishali Naidu D, Sharada Reddy J, Patloth T, et al. Cone-beam Computed Tomographic Evaluation of the Quality of Obturation Using Different Pediatric Rotary File Systems in Primary Teeth. Int J Clin Pediatr Dent 2021;14(4):542–547.

The Dissolving Capability Of Various Gutta-Percha Solvents

The purpose of this in-vitro study was to compare and evaluate the efficiency of three types of chemical solvents; tetrachloroethylene, xylene and eucalyptol oil in softening gutta-percha and zinc oxide eugenol sealer. Thirty extracted human lower second premolars with single and straight canals were used in this study. All teeth had mature apices. The coronal portions of the experimental teeth were removed to standardize the length of the root (15 mm from apex to coronal end).Step-back instrumentation was performed to flare and enlarge the canals until size 45(master apical file). Lateral condensation technique was used to obturate the canals with gutta-percha and zinc oxide eugenol cement sealer, and then stored in 100% humidity at 37° for 7 days. Specimens were randomly divided into three experimental groups based on the solvent to be used (10 teeth for each group).A number 30 hedstrom file was used with a push-pull action to attempt penetration into the test sample with the addition of 0.02 ml increments of solvent. The times taken for the hedstrom file to penetrate the length of the canals were recorded.The results showed that tetrachloethylene has statistically the lowest mean of penetration time, followed by xylene while eucalyptol oil has the highest mean of penetration time.

Is Zinc Oxide Eugenol Cement Still Impeding the Use of Resin-based Restoration? A Systematic Review

Abstract Background: The use of zinc oxide eugenol (ZOE), along with resin restoration or cementation, is often a debatable topic in dentistry. This systematic review is aimed to explore the effect of ZOE on various properties of resin-based dental materials. Materials and Methods: An electronic research was carried out using the relevant keywords in different search engines such as MEDLINE/PubMed, Ebscohost, SCOPUS, Web of Science, and EMBASE SciFinder based on PRISMA guidelines. Only articles in the English language were included along with other specific inclusion criteria. Results: The entire articles were assessed for the eligibility and final review included 30 studies that were then classified according to the type of test conducted on the resin-based material. Conclusion: There is no consensus on the deleterious effect of ZOE on resin-based dental material. However, all the tests conducted were in vitro and most of them showed a significant reduction in the quality of resin restorative and cement materials when used with ZOE.

Evaluation of the clinical efficiency of rotary and manual files for root canal instrumentation in primary teeth pulpectomies: A comparative randomized clinical trial

Aim: To evaluate and compare the instrumentation time, obturation time, quality of obturation, and clinical and radiological success of pulpectomized teethfollowing root canal preparation of primary molars with rotary and manual file system. Methods: A total of 150 primary molars requiring pulpectomy were selected from children aged four to seven years. These teeth were divided into three groups of 50 teeth each. In Groups 1, 2, and 3, cleaning and shaping were carried out with Kedo-S pediatric rotaryfiles, HERO Shaper rotary files, and manual NiTi K-files, respectively. Obturation was carried out with zinc oxide eugenol cement and an engine-driven Lentulo spiral. The instrumentation and obturation times were recorded. A radiographic assessment of thequality of the root filling was carried out immediately after obturation. Finally, the pulpectomized teeth were clinically and radiographically evaluated over a two-year period. Results: The mean instrumentation times for Groups 1, 2, and 3 were 14.56 ± 2.89 min, 17.93 ± 3.51 min, and 29.00 ± 2.08 min, respectively. The mean obturation times for Groups 1, 2, and 3 were 8.11 ± 1.7 min, 7.93 ± 1.3 min, and 9.64 ± 17.61 min, respectively. The mean difference in the quality of obturation was not statistically significant in primary molars instrumented with Kedo-S pediatricand HERO Shaper rotary file systems (p = 0.16). However, this mean difference was significant when compared between primary molar instrumented with rotary file systems and manual NiTi files (p = &lt;0.001). At two years, the clinical success rate was 100% and the radiological success rates were 95.3%, 97.9%, and 89.5% in Groups 1, 2, and 3, respectively. Conclusions: The rotary file systems took significantly less instrumentation and obturation time than the manual NiTi files. There were no significant differences in obturation quality or success rates after two years.

Antimicrobial activity of root canal filling materials

The antimicrobial activity of filling materials was studied to improve the quality of treatment of complicated caries in vitro. Resorcin-formalin cement Resodont (“Latus”, Ukraine) - № 1; Endocort zinc oxide-eugenol cement (“Latus”, Ukraine) - No. 2; materials based on zinc oxide eugenol cement with dexamethasone: Endomethasone ivory (Septodont, France) - No. 3 and Endofil ("Produit Dentaires SA", Switzerland) - No. 4. To assess the antimicrobial activity of the studied materials, test microorganism strains were used: Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 6783, Candida albicans ATCC 885-653. As a result of the study, it was established that filling materials have different antimicrobial activity. Resodont has the greatest antimicrobial activity on the test culture. Endomethason is active in relation to the test cultures studied, inferior to Resodont in its antimicrobial properties. Endocort and Endofil have less antimicrobial activity than Resodont and Endomethason, but have approximately equal growth retardation rates. It should be noted that with respect to Staphylococcus aureus, Endocort was found to be almost 1.5 times more active than Endofil. The conducted studies confirm that the materials for filling of root canals by Resodont and Endocort (Latus, Ukraine) have a pronounced antibacterial effect. They are competitive with foreign sealers and are the materials of choice, having a significantly lower cost.

EVALUATION OF THE DISSOLVING EFFICACY OF ESSENTIAL OILS ON ENDODONTIC OBTURATING MATERIALS: AN IN VITRO STUDY.

Aim:Endodontic retreatment is a procedure that removes the lling materials from the root canals followed by their cleaning, shaping and obturation. This in-vitro study aimed to compare and evaluate the ability of various essential oils as solvents in dissolving gutta-percha, epoxy resin, and zinc oxide eugenol (ZOE) cements. Materials and methods: A total of 28 cylindrical specimens in each group ZOE, epoxy resin, 28 ISO size 40 gutta-percha cones were prepared and divided into four groups for immersion in the different solvents, i.e. lemon oil, citronella oil, lavender oil, and TCE(Tetrachloroethylene (control)) for 5 minutes. The obturating materials dissolution in the solvents were obtained by the difference between the pre-immersion original weight and the post-immersion weight on a digital analytical scale. Data were statistically analysed by a paired t-test and Analysis of Variance (ANOVA) (p &lt; 0.05). Results: Order of efcacy of dissolution of essential oils was found to be lemon oil &gt; Citronella oil &gt; Lavender oil and was highly signicant (p &lt; 0.01). In all the solvents, Gutta-percha showed maximum dissolution (Fvalue:149.56) followed by ZOE(89.07 ) and resin sealer least (23.86). Conclusion: It can be concluded that the lemon oil can be used as a solvent for dissolving obturating materials.