Gutta-percha Research Articles

Comparative Evaluation Of The Effect Of Different Chelating Agents On The Push-Out Bond Strength Of A Bioceramic Sealer: An In-Vitro Study

Aim: This study aimed to assess how the push out bond strength of a bioceramic sealer (Meta CeraSeal) is affected by three different chelating agents: 17% EDTA, 7% Maleic acid, and 5% Pentetic acid. Methodology: 60 mandibular premolars were shaped using Pro Taper Gold rotary file upto size F2. The canals were irrigated with 2ml of 5.25% sodium hypochlorite (NaOCl) between instrumentation and then the NaOCl was removed by rinsing with five milliliters of distilled water.. The 60 specimens were divided into 4 groups of 15 each, in a random manner, depending on the final irrigating solution: Group 1 (n=15): 17% EDTA,Group 2 (n=15): 7% Maleic acid,Group 3 (n=15): 5% Pentetic acid and Group 4 (n=15): 0.9% Saline. The canals were obturated with Meta CeraSeal coated gutta percha using single cone technique. Access to cavities were sealed and the specimens were sectioned to obtain three horizontal sections at distances of 12, 6, and 2 mm from the apex (coronal, middle, and apical root sections, respectively). A universal testing machine was used to apply the push-out test. Results: The push out bond strength was significantly higher for 5% Pentetic acid as compared to 17% EDTA and 7% Maleic acid (p<0.05). Also, the apical third exhibited the lowest push out bond strength value in all the groups. Conclusion: Within the limitations of the study, it can be concluded that, in comparison to the other tested groups, 5% pentetic acid has higher potential to facilitate the bonding of the bioceramic sealer Meta CeraSeal to root dentin

RETRATAMENTO ENDODÔNTICO NÃOCIRÚRGICO EM MOLAR INFERIOR COM INFECÇÃO SECUNDÁRIA: CINCO ANOS DE ACOMPANHAMENTO

This study reported the repair of a periapical lesion after endodontic retreatment. A 42-year-old female patient was referred to an endodontic specialist for endodontic retreatment of tooth 36. Clinically, she was asymptomatic, and the periapical radiographic examination revealed radiopaque material similar to gutta percha and an inadequate filling of the canal (sub -root canal filling, in addition to a radiolucent image present in the apical region of the tooth. After anesthesia, the coronal opening was performed using ProDesign Logic RT #30/10, #.25/08, #.20 rotary instruments. /06 At that moment, the instrument fracture occurred in the mesio-lingual canal, which was removed with ultrasonic tips and a microscope. , Belo Horizonte, Brazil) at CRT. The foraminal debridement was performed with a Logic 25.01 instrument along the actual length of the tooth. Root canal filling was performed using the #30.05 single cone technique and Bio-C Sealer bioceramic endodontic cement. At the 5-year follow-up, the patient was asymptomatic and the radiographic examination confirmed complete repair of the periapical lesion.

Standardization of Variable Taper Files and Corresponding Gutta-Percha Cones Amongst Manufacturers

IntroductionCurrently there is no standardization of variable taper endodontic files and corresponding gutta-percha (GP) cones. The aim of this study was to evaluate intramanufacturer and intermanufacturer variability of diameter and taper in the apical third of GP master cones and finishing files from 3 commercially available variable taper endodontic systems. MethodsDiameter measurements were recorded using digital microscopy at 1-mm increments (D1-D4) for F2 files and corresponding GP cones (n = 20 per system) from ProTaper Gold (Dentsply Tulsa Dental Specialties, Johnson City, TN), EdgeTaper Platinum (EdgeEndo, Albuquerque, NM), and ExactTaper H (SS White, Lakewood, NJ). Taper was defined as the rate of change in diameter per 1-mm increment. Mean differences in diameter were assessed using repeated measures of analysis of variance for D1 to D4 and the Wilks test for differences in taper. ResultsIn the apical third, ProTaper and EdgeEndo mean file diameters were significantly smaller than corresponding GP cone diameters (P < .01, P < .01, respectively). Contrastingly, SS White file diameters were significantly larger than their corresponding GP cones (P = .02). Files from all manufacturers had significantly smaller diameters than advertised (nominal) values (P < .01). ProTaper GP cones had similar diameters to nominal values (P = .30), while EdgeEndo and SS White GP cones were significantly smaller (P < .01). Amongst files and corresponding GP cones from all systems, taper was nonstandardized. ConclusionsSize discrepancies between finishing files and corresponding GP cones can be expected amongst variable taper endodontic systems. Therefore, clinicians should be prepared to make intraoperative adjustments when obturating.

Comparative In Vitro Analysis of Push-Out Bond Strength of Different Root Canal Sealers to Root Dentin

ABSTRACT Aim: The study’s objective is to assess the bond strengths of four different endodontic sealers to root dentin using a push-out test technique. Material and Method: Sixty single-rooted teeth were selected and decoronated. Canal instrumentation was done using rotary files and divided into four groups (n = 15) based on the sealer used. Group 1: zinc oxide eugenol (ZOE)-based, Group 2: epoxy resin-based, Group 3: methacrylate-based, and Group 4: bioceramic. Following obturation with Gutta Percha, each tooth was prepared with root portions that were 2 mm thick at the apical and middle 1/3 so that universal testing equipment could measure the push-out bond strength. Tukey’s post hoc tests and one-way ANOVA were used to examine the data. Result: According to the results, group 4 had the strongest push-out relationship, followed by groups 3, 2, and 1, respectively. It can be concluded that the bioceramic sealers have superior bond strengths. Conclusion: Bioceramic sealers demonstrated the highest bond strengths to root dentin, outperforming methacrylate, epoxy resin, and zinc oxide eugenol sealers in the push-out test.

Impact of LASER activated irrigation on the retrievability of Guttaflow bioseal (in-vitro study)

BackgroundThis study aimed to evaluate the efficiency of diode LASER activated irrigation in the removal of GuttaFlow Bioseal root canal filling material during retreatment.Materials and subjectsRoot canals of forty-five single-rooted human mandibular premolar teeth were prepared with ProTaper Universal rotary system and obturated with lateral condensation obturation technique using Gutta Percha and Roeko GuttaFlow Bioseal root canal sealer. All specimens were retreated with ProTaper Universal Retreatment System files then divided to three different groups according to the technique of activation of irrigation. Samples were sectioned, and the residual filling remnants were captured using digital camera attached to microscope. Data was collected by three different interpreters, to eliminate the subjectivity of the process, using the ImageJ Software. The mean value of the data was obtained and evaluated statistically. The significance level was set at P ≤ 0.05.ResultsThe remaining filling materials in the canals irrigated with ultrasonic activation (6.17 ± 1.42 at coronal level, 10.93 ± 1.91at middle level, and 14.58 ± 2.23 at apical level) were less than these irrigated with LASER activation (15.87 ± 3.78 at coronal level, 21.28 ± 4.44 at middle level, and 27.06 ± 2.68 at apical level). Maximum amount of remaining filling materials was present in the canals irrigated with passive side-vented syringe (23.07 ± 3.22 at coronal level, 38.09 ± 7.27 at middle level, and 34.24 ± 9.77 at apical level).ConclusionThe activation of irrigation techniques used were incapable of complete removal of filling material at root canal walls.

Marginal adaptation of customized gutta percha cone with calcium silicate based sealer versus MTA and biodentine apical plugs in simulated immature permanent teeth (an in vitro study)

BackgroundThis study aimed to compare the marginal adaptation of a single customized gutta percha cone with calcium silicate-based sealer versus mineral trioxide aggregate (MTA) and Biodentine apical plugs in simulated immature permanent teeth.MethodsThirty-nine extracted human maxillary anterior teeth were selected, prepared to simulate immature permanent teeth with an apical diameter 1.1 mm, placed in moist foam and divided into three groups. Group 1: Obturation with a single customized gutta percha cone and calcium silicate sealer. Group 2: MTA apical plug. Group 3: Biodentine apical plug. After incubation, teeth were horizontally sectioned at 1 mm and 3 mm from the apex and marginal adaptation was evaluated using scanning electron microscope (SEM).ResultsBiodentine showed the least mean gap size at both 1 and 3 mm from the apex with no statistically significant differences compared to MTA (p > 0.05). The single customized cone with calcium silicate based sealer showed the greatest mean gap size at both 1 and 3 mm from the apex with a statistically significant difference compared to the other groups (p < 0.001).ConclusionBiodentine and MTA apical plugs provide a significantly better marginal adaptation to the dentinal walls than a single customized gutta percha cone with calcium silicate based sealer in simulated immature permanent teeth.

The Efficiency of Different Supplementary Irrigation Techniques After Nickel-Titanium Rotary System in Endodontic Retreatment

Objective: To assess the efficiency of XP-Endo Finisher file (XPFF), EDDY, and diode laser as supplementary irrigation activation techniques following nickel-titanium rotary files in the endodontic retreatment. Methods: 48 mandibular premolars were collected. Each root canal was shaped and filled with EndoSequence BC sealer and gutta percha. After 14 days, endodontic retreatment was performed using D-Race instruments. Then, 48 samples were assigned into 4 groups (n=12) as control, diode laser, EDDY, and XPFF according to the supplementary irrigation methods. After the irrigation procedure, all samples were visualized under a stereomicroscope. The remaining root filling material was scored and compared statistically using Kruskal-Wallis and Post-hoc pairwise comparison tests. Results: In all thirds, there was a significant difference between the diode laser and control groups. The amount of remaining filling material in the diode laser group was significantly lower than in the control group. When the other groups were compared, a significant difference was observed only between the diode laser and XPFF groups in the coronal third. Conclusion: No supplemental method could eliminate the root obturation material. The diode laser can be used in addition to nickel-titanium rotary retreatment systems to improve the removal of gutta percha and bioceramic sealer.

Comparative Evaluation of Different Obturation Techniques for Root Canal Filling of Permanent Teeth: An In-Vitro Study.

Achieving success in root canal (RC) therapy relies on three key components: comprehensive cleaning of the canal, efficient disinfection, and proper filling of the canal space. The present study aimed to compare the efficacy of four obturation techniques: single cone (SC), GuttaCore (GC), cold lateral condensation (LC), and C Point systemfor RC filling of permanent teeth. 76 extracted human mandibular first premolars were divided into four groups, with 19 teeth in each group (group A, obturation with SC technique; group B, obturation with GC; group C, obturation with LC; and group D, obturation with C Point system). The samples were marked at 4 mm and 8 mm from the root apex using a marker and calliper, sectioned horizontally, and analyzed under a stereomicroscope at 20x magnification. The mean percentage (%) of gutta-percha (GP)-filled area was compared using a two-way analysis of variance (ANOVA), followed by the Bonferroni post-hoc test. The mean percentage of GP-filled area at a distance of 4 mm from the apex was highest in group B (0.86±0.04; 95% CI: 0.845-0.881), followed by group D (0.70±0.07; 95% CI: 0.664-0.736), group A (0.61±0.05; 95% CI: 0.595-0.642), and least in group C (0.58±0.09; 95% CI: 0.543-0.627), and the difference was statistically significant (p≤0.05). The post-hoc pairwise comparison of groups at 4 mm revealed that there were statistically significant differences between group D and groups B, C, and A (p ≤ 0.001). The mean percentage of the GP area at a distance of 8 mm from the apex was highest in group B (0.81±0.10; 95% CI: 0.761-0.861), followed by group D (0.75±0.07; 95% CI: 0.725-0.792), group A (0.69±0.07; 95% CI: 0.658-0.729), and lowest in group C (0.65±0.10; 95% CI: 0.607-0.709), and this difference was statistically significant (p≤0.05). Post-hoc pairwise comparison of groups at 8 mm revealed that there was a statistically significant difference between groups D and C (p=0.006), whereas no statistically significant differences were noted between groups D and B (p=0.473). Furthermore, no statistically significant differences were noted between groups C and A at 4 mm and 8 mm (p>0.05). Obturation with the GC system provided the best results in terms of the percentage of GP-filled area at 4 mm. However, at 8 mm from the apical region, both the GC and C Point systems provided similar results.

Microleakage Assessment of Single Cone Gutta Percha Obturation Technique Using Different Types of Sealers

This study was carried out to compare the coronal and apical seal of canals obturated with single cone technique using different types of epoxy resin root canal sealers. A total of sixty extracted human upper molars with fully formed and sound palatal roots were used in this study. The crown of each tooth was decoronated at cement-enamel junction and the palatal root canal was prepared using ProTaper gold rotary instruments. Sixty specimens were used and divided into 3 equal groups(n=20) for single cone obturation using two different types of epoxy resin sealers AH26 and vioseal sealers respectively and one control group without sealer. All the specimens were exposed varnish application followed by dye penetration test using 2% methylene blue dye then root sectioning. Samples were evaluated under a stereomicroscope to detect the linear measurement of the dye penetration from the apical constriction. The image transferred to a computer equipped with the image analysis software program where the dye penetration along the filling dentine interface was evaluated. The collected data was statistically analysis by using Graph Pad Instat software for windows. One-way ANOVA was done for compared results followed by Tukey’s pair-wise. The results showed that, the difference in dye penetration microleakage means between groups was statistically significant as revealed by one-way ANOVA test (p &lt; 0.05). Pair-wise Tukey’s post-hoc test showed non-significant (p&gt;0.05) difference between (AH26 and Vioseal sealers) groups. None of the tested root canal sealers could eliminate the dye infiltration or microleakage formation. Single cone gutta-percha combined with AH26 sealer exhibited less microleakage than vioseal sealer although there were no statically significant differences between them.

COMPARATIVE EVALUATION OF FRACTURE RESISTANCE OF ENDODONTICALLY TREATED TEETH USING DIFFERENT TYPES OF ROOT CANAL SEALERS: AN IN-VITRO STUDY

Introduction: Obturation materials are considered the key elements in supporting strength of endodontically treated teeth. Hence, along with gutta percha (GP) use of sealers strengthen the remaining tooth structure, thus increasing fracture resistance. Material and Methods: Eighty extracted single rooted mandibular premolar teeth were decoronated to standardized root length of 13mm. After confirming working length cleaning and shaping upto F2 file along with irrigation using 5ml 3% NaOCl, 5ml 17% EDTA and normal saline was done. Teeth were divided into 5 groups (n=16) depending upon type of sealer used for obturation along with gutta percha (GP) using lateral compaction technique. Group 1: Endoseal sealer, Group 2: AH Plus, Group 3: Apexit Plus, Group 4: Bio C Sealer, Group 5: Instrumented and unobturated (Control). Samples were stored for 7 days at 37 degree and 100% humidity for sealer to set completely. Samples were mounted vertically 3mm into acrylic resin block leaving 9mm of root length exposed. Fracture resistance was tested using Universal Testing Machine (UTM). Amount of force required for fracture was recorded in Newton. Data were analysed using SPSS 22.0 and oneway ANOVA and Post hoc Tukey test were used for statistical analysis. Result: The maximum fracture resistance was obtained in Group 4 Bio C sealer i.e. 418.81±21.06 N, followed by Group 2, Group 3 and Group 1. Least fracture resistance was obtained in Group 5. Conclusion: Bio C sealer provides the best fracture resistance to the endodontically treated teeth when compared with AH Plus, Apexit Plus and Endoseal.

Comparison of the Amount of Debris Extruded From the Apex During Retreatment Procedures Using Several File Systems and to Gauge the Effect of Same and Different Taper on the Debris Extrusion: An In Vitro Study.

To determine the amount of apical extrusion between various file systems during the retreatment procedure and to determine the effect of taper on the same. Seventy mandibular extracted premolars were taken, and preparation was performed using a Woodpecker file (Woodpecker Medical Instrument Co., Ltd., Guilin, China) (25/0.06). The gutta-percha (GP) was removed from each specimen with H file (#40/0.02) to simulate retreatment in seven groups (n = 10) using ProTaper Next (PTN;Dentsply, Maillefer, Ballaigues, Switzerland) (PTN) (30/0.07), Reciproc (25/0.08), Hyflex CM (30/0.06), Mtwo (30/0.05), Neoendo flex (30/0.04), Neoendo hybrid (30/0.04), and Flexicon file (30/0.06). The specimens were held with the help of a rubber stopper and put in the Eppendorf tube of volume 4 mL (pre-weighed before retreatment). The debris that was on the root surface of the specimen was washed with distilled water with 1 mL volume, kept in the oven, and then again weighed after 7 days. Apical extrusion was found in the following order: HYFLEX CM (LEAST) < FLEXICON < PROTAPER NEXT < RECIPROC < NEOENDO FLEX < NEOENDO HYBRID < MTWO (HIGHEST). W Hyflex CM and Flexicon files showed lesser extrusion of debris than others.

Effectiveness of photosensitized curcumin fibers, aloevera, amla juice and panchatulsi in disinfecting guttapercha cones.

Herbal remedies have demonstrated remarkable effects as anti-diabetic, anticancer, antimicrobials, immunological modulatory agent in liver problems, respiratory illnesses, and as beauty agents. The need for more affordable, readily accessible, and alternative medicines has led to a rise in the recognition of herbal drugs. Therefore, it is of interest to evaluate and compare the effectiveness of photosensitized curcumin fibers, Aloevera, Amla Juice and Pancha Tulsi in disinfecting guttapercha (GP) cones. It was observed that all experimental disinfectants were found to have greater antimicrobial action than the positive control in which no disinfectant was used. The order of antimicrobial action among different experimental disinfectants against Staphylococcus aureus and Enterococcus faecalis in disinfection of GP cones was in following order PanchaTulsi>Curcumin fibers >Amla juice > Aloe vera. It was concluded that all herbal disinfectants were found to have antimicrobial effectiveness in disinfection of GP cones with Panchtulsi having maximum disinfectant ability followed by photosensitized curcumin fibres.

Rootless Tooth Hanging with Gutta Percha Cone: Report of a Case with Replacement Root Resorption

Rootless Tooth Hanging with Gutta Percha Cone: Report of a Case with Replacement Root Resorption

Research on the Performance and Modification Mechanism of Gutta-Percha-Modified Asphalt.

Presently, there is a significant focus on the investigation and advancement of polymer-modified asphalt that is both high-performing and environmentally sustainable. This study thoroughly examined the performance and modification mechanism of gutta-percha (GP) as a novel asphalt modifier. The investigation was conducted using a combination of macro- and microscopic testing, as well as molecular dynamics simulations. This work primarily examined the compatibility of GP with asphalt molecular modeling. This paper used molecular dynamics to identify the most suitable mixing temperature. Next, the gray correlation theory was used to discuss the most effective method for preparing gutta-percha-modified asphalt (GPMA). The macro-rheological tests and microscopic performance analysis provided a full understanding of the impact of GP on asphalt properties and the process of alteration. The findings indicate that eucommia ulmoides gum (EUG) exhibits good compatibility with asphalt, while sulfur-vulcanized eucommia ulmoides gum (SEUG) does not demonstrate compatibility with asphalt. Both EUG and SEUG enhance the thermal stability and resistance to deformation of asphalt at high temperatures, with SEUG having a particularly notable effect. However, both additives do not improve the resistance of asphalt to cracking at low temperatures. The manufacturing method for EUG-modified asphalt (EUGMA) involves physical mixing, whereas sulfur-vulcanized eucommia ulmoides gum-modified asphalt (SEUGMA) involves physical mixing together with certain chemical processes. This research establishes a theoretical foundation for the advancement of GP as a novel environmentally friendly and highly effective asphalt modification.

Comparative Evaluation of the Removal of Gutta Percha From the Root Canal Using Various Retreatment File Systems With and Without Magnification: An In Vitro Study.

The main goal was to compare the efficacy of gutta percha (GP)removal from the root canal using the Neo Endo Retreatment file system, Solite RS3, and ProTaper Universal Retreatment (PTUR) files with and without magnification under a direct operative microscope using stereomicroscopic evaluation. Sixty single-rooted teeth were randomly assigned to one of three groups after obturation till F2 mastercone with resin sealer: Group 1 (n=20): Neo Endo Retreatment Files, Group 2 (n=20): Solite RS3, Group 3 (n=20): PTUR files. Each group was further separated into two subgroups: Subgroup 1: without magnification (no direct operative microscope) and Subgroup 2: with magnification under a direct operative microscope at 12× magnification. After retreatment, the roots were grooved buccolingually and split into two halves using a diamond disc with the help of a chisel. The samples were examined under a stereomicroscope. Images were captured in a digital camera and analyzed using image analyzing software Image Pro v10 (Media Cybernetics). The Neo Endo retreatment file system had a significantly greater percentage of remaining obturating material than the Solite RS3 Retreatment and PTUR file systems (p<0.05) in both groups with and without magnification. In the group without magnification, Solite RS3 showed a significant difference compared to ProTaper (p<0.05). In the group with magnification, there was no significant difference between the ProTaper Universal retreatment file system and Solite RS3 (p=0.589). Retreatment performed without magnification had more remnant GP when compared to the retreatment procedure performed under magnification of the direct operative microscope. Under stereomicroscopic evaluation, the remnant GP was higher in the Neo Endo File System both with and without magnification than in the Solite Retreatment and PTUR file systems. ProTaper showed moderate significance in removing the obturation than Solite RS3 in the magnification group. The Solite RS3 file system performed as efficiently as the PTUR file system.

Hydraulic (Single Cone) Versus Thermogenic (Warm Vertical Compaction) Obturation Techniques: A Systematic Review.

Root canal treatment (RCT) involves cleaning and shaping of the root canal system before filling the canals with obturating materials, often gutta-percha (GP). The two primary obturation techniques are the thermogenic (warm vertical compaction, WVC) and hydraulic (single cone, SC) techniques.The objective of this study is to compare the clinical results and effectiveness of thermogenic and hydraulic obturation procedures in endodontic therapy to provide clinicians with evidence-based recommendations. Search strategies were conducted on February 01, 2024and involved the databasesWeb of Science, PUBMED, Google Scholar, Scopus, Medline, Embase, NCBI, and Cochrane Library.The current systematic review included systematic reviews; meta-analyses; cohort studies; randomized controlled trial (RCT) studies; studies involving the comparison between single cone and warm compaction techniques; studies involving outcomes that include advantages, disadvantages, and complications associated with single cone or warm compaction techniques; and studies published within the last seven years. The selected studies were restricted to those with insufficient data, review articles without authentic references, publications in a language other than English, animal studies, and studies not involving SC or WVC. Out of 2300 studies registered, only 12 studies were included in the review. Both WVC and SC techniques showed satisfactory root canal fillings. However, five studies showed differences in the filling quality, four studies assessed the sealing ability and the dentinal tubule penetration of sealers, one study compared dentinal cracks, one study evaluated the amount of debris excluded apically, and one study compared the post-operative pain while using both techniques. The WVC andSC obturation techniques offer advantages and disadvantages in endodontic treatment. SC obturation is a simple and efficient procedure that is particularly suitable for situations with uncomplicated canal structures. The WVC obturation approach provides superior flexibility and sealing capability, especially in the complex root canal system. When choosing the method of treatment, it is important to take into account the patient's preferences, the clinician's experience, and unique considerations related to the situation. This systematic review highlights the important recommendations to healthcare professionals in selecting the most suitable obturation procedure based on the specific requirements of each clinical scenario. Research involving long-term follow-ups is required to get a better understanding of the outcomes of long-term goals. Clinical relevance: ability to educate clinicians regarding the best obturation technique between thermogenic and hydraulic. It directs the treatment decisions to maximize patient's comfort, minimize post-operative complications, and improve efficacy in endodontic practice.

Radiographic assessment of the quality of post and core restorations performed by general dental practitioners in Saudi Arabia

BackgroundDentists utilize various techniques and materials for post and core restoration of endodontically treated teeth, which remains a noteworthy health concern and can be addressed through interdisciplinary strategies to enhance outcomes. Therefore, this study aimed to evaluate the technical quality of the residual gutta-percha (GP) and posts by analysing the periapical radiographs of endodontically restored teeth. MethodsA total of 594 periapical digital radiographs were evaluated for tooth type, post material, post shape, design, diameter, length, residual GP, GP length, GP tapering, GP homogeneity, and final restoration. Frequency distribution and cross-tabulation of the variables were performed. ResultsMaxillary molars had the highest frequency of restorations, including posts, accounting for 27.4 %, followed by maxillary premolars (25.4 %) and maxillary anterior teeth (19.2 %). The prefabricated metallic posts were most commonly used (81.0 %), among these, 50.4 % were screwed posts. Tapered posts were the most commonly used (65.6 %). The percentage of posts with an acceptable length was 58.2 %. The most commonly used posts exhibited a width of one-third of the root diameter, accounting for 87.0 %. Suitable GP lengths were observed in 61.1 % of the restorations, and 62.8 % demonstrated adequate GP homogeneity. The findings of this study revealed that crown restoration accounted for 42.6 % of the studied sample. ConclusionsThe technical quality of the remaining GP after restoration was comparable to that of previous epidemiological investigations. However, the technical quality of the post was deemed suboptimal.

Cleaning efficacy and debris extrusion of supplementary file systems XP-endo Finisher and XP-endo Finisher R in endodontic retreatment

Aim: To evaluate cleaning efficacy and debris extrusion of supplementary file systems XP Endo Finisher (XPEF) and XP Endo Finisher R (XPEFR) in endodontic retreatment. Materials and Methods: Thirty single-rooted teeth with single canals were selected, canal preparation done till file #30 6% and obturation completed using lateral condensation technique with AH Plus sealer. The samples were stored at 37°C in a 100% humidity incubator for 7 days. The samples were distributed across the three groups according to the method of retreatment (n = 10): Group I: Neo Endo retreatment (NER) files, Group II: NER files + XPEF, and Group III: NER files + XPEFR. Removal of gutta percha using each file system according to the distributed groups was performed. The extruded debris was collected in an Eppendorf tube, dried in a hot air oven, and weighed. Teeth were sliced longitudinally using carborundum discs. Coronal, middle, and apical thirds were assessed for cleaning efficacy under a stereomicroscope. Results were tabulated and subjected to the statistical analysis using the Kruskal–Wallis H-test followed by post hoc turkey HSD test. All statistical tests were carried out at significance level P &lt; 0.05. Results: It was seen that Group II (NER files + XPEF) exhibited better cleaning efficacy than Group III (NER files + XPEFR), although the results were not statistically significant. Greater debris extrusion was seen with Group III when compared to Group II. Conclusion: Supplementary files XPEF/XPEFR enhance the cleaning efficacy in endodontic retreatment, but the debris extrusion of XPEFR is more than XPEF.

Comparison of Gutta Percha Removal with Manual H-Files and ProTaper with or Without Eugenate

Comparison of Gutta Percha Removal with Manual H-Files and ProTaper with or Without Eugenate

Effectiveness of H-files and Pro-Taper universal systems in removing Gutta-percha during endodontic retreatment: A comparative study

ObjectiveThis research was aimed at assessing the effectiveness of manual H-files versus a combination of a Pro-Taper universal rotary canal preparation system and retreatment system in removing gutta-percha (GP) during endodontic retreatment, by using a digital radiography technique. MethodsThis ex vivo study used a non-probability consecutive sampling technique. The study sample comprised 60 extracted anterior permanent teeth, each with one root with a straight root canal (RC). After preparation, RCs were obturated with GP and sealer. Subsequently, teeth were stored for 2 weeks in a humid environment at 37 °C. Thirty teeth each were randomly assigned to the control (group I), and experimental (group II) groups. GP removal was performed with H-files {group I) or a combination of a Pro-Taper universal rotary canal preparation system and retreatment system (group 2). Digital radiographs were acquired with Carestream digital radiovisiography software (Kodak; version-VER.6.10.8.3-A), and the presence of residual GP was analyzed. AutoCAD (2006) software was used to demarcate the RC and residual root filling. The residual GP in both groups was compared with independent sample t-tests. ResultsThe remaining root filling did not significantly differ when GP was removed with conventional Hedstrom files versus a combination of Pro-Taper Universal preparation and retreatment file systems. The residual GP was confined to the apical third of the canals in both groups. ConclusionsPro-Taper Universal preparation and retreatment file systems have similar effectiveness to manual H-files in GP removal in straight canals.