Ultrasonic Activation of a Bioceramic Sealer and Its Dentinal Tubule Penetration: An In Vitro Study (original) (raw)
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Global journal for research analysis, 2019
The aim of this study was to evaluate the efficacy of sonic and ultrasonic activation of epoxy-amine resin-based root canal sealer on penetration of the sealer into lateral canals compared to non-activated lling. Materials and method Thirty-six single-rooted human anterior teeth were decoronated and prepared, using the ProTaper rotary system (Dentsply Maillefer, Ballaigues, Switzerland) to F4. After the completion of the clearing procedures, lateral canals were created at 3 mm from the working length. The specimens were randomly divided into a control group (manual agitation) and two experimental groups that received a sealer application with either sonic or ultrasonic activation. The root canals were lled using cold lateral compaction and imageswere obtained from each lateral canals at 40× magni cation using a stereomicroscope. The sealer penetration was evaluated using a four-grade scoring system. The data were evaluated statistically using the Mann-Whitney U tests with a 95 % con dence level (P = 0.05). Results The ultrasonic activation resulted in a better sealer penetration compared with the non-activated and sonically activated groups (P < 0.001). Sonic activation also resulted in better sealer penetration compared to the non-activated group (P < 0.001). Conclusions The use of the ultrasonic activation of an epoxyamine resin-based sealer promoted greater sealer penetration into the lateral canals. Sonic activation was not effective as ultrasonic.
RGO - Revista Gaúcha de Odontologia, 2018
Objective This study analyzed the influence of the irrigating solutions ultrasonic activation on the obturator cement penetration into lateral root canals. Methods Fifty maxillary molars (palatine root) were randomly assigned to 5 experimental groups (Group 1 (EDTA 17% + manual agitation for 5 minutes), Group 2 (EDTA 17% + ultrasonic activation for 15 seconds), Group 3 (NaOCl 1% + Ultrasonic activation for 15 seconds), Group 4 (EDTA 17% + ultrasonic activation for 15 seconds and NaOCl 1% + ultrasonic activation for 15 seconds) and Group 5 (negative control). The lateral root canals were made in the apical and middle third. The obturation occurred in a single session. The radiographic and microscopic analyzes were performed to evaluate the sealant cement penetration degree. Data were analyzed by the Mann-Whitney and Wilcoxon tests. Results Apical and middle third radiographic analysis showed that Groups 2 and 4 presented better penetration of the sealant cement. In the microscopic analysis, Group 4 presented superior results in relation to the other groups in both thirds. In the apical third, radiographic and microscopic analyzes showed significant differences in the comparisons between Group 4 and Groups 5 (p = 0.019) and 3 (p = 0.023) and between Group 5 and Groups 2 (p = 0.012), 3 (P = 0.038) and 4 (p = 0.019), respectively. Conclusion It was concluded that the ultrasonic activation of the NaOCl 1% + EDTA 17% irrigation solution provides greater penetration of the endodontic cement in lateral root canals.
Advanced Dental Journal
Aim: This study was conducted to evaluate contact angle and dentinal tubules penetration depth of Epoxy resin-based sealer Adseal and calcium silicate-based sealer CeraSeal with different obturation techniques using Scanning Electron Microscope (SEM). Subjects and methods: 56 freshly extracted upper central incisors were prepared in the present study. The specimens were divided into four experimental groups (each n= 14) which were filled with different sealers (Ceraseal and Adseal) by different obturation techniques {Cold lateral compaction (CLC) and Warm vertical compaction (WVC)} and respective core filling materials. Group 1 (Ceraseal/ WVC), Group 2 (Ceraseal/CLC), Group 3 (Adseal/ WVC) and Group 4 (Adseal/ CLC). Root slices were cut with a thickness of 1 mm at 2 to 3, 5 to 6 and 8 to 9 mm from the root tip using diamond saw with coolant then scanning electron microscope at 1600x magnification was employed to assess the tubular penetration of different sealers. One Way ANOVA test was used to compare different groups, followed by Tukey`s Post Hoc test for multiple sections comparison. The significance level (P-value) was set as P-value < 0.05. Results: CeraSeal /CLC group and Adseal / WVC group showed the highest dentinal tubules penetration (11.75±3.72 µm and 10.45±4.73 µm, respectively) with statistically insignificant difference between them (P>0.05). Adseal/CLC group showed the lowest penetration (6.63±2.73 µm), while CeraSeal/ WVC group (9.41±2.71 µm) revealed insignificant difference with the other groups (P>0.05). Conclusion: Obturation technique should be selected according to sealer type for a successful endodontic treatment. Bioceramic sealer had higher ability of dentinal tubules penetration than epoxy resin sealer.
F1000Research
Background: The main factors that affect the success of an endodontic infection are effective cleaning and shaping of the root canal system including complete disinfection by using chemical irrigating solutions and obturation with an endodontic sealer to provide a fluid-tight seal. Using rotary and hand instruments for shaping and cleaning the root canal along with irrigants produces a smear layer on the surface of root dentin affecting the penetration of the endodontic sealer into the dentinal tubules. This smear is difficult to remove with the use of only endodontic irrigants, hence, chelating agents were introduced in adjunct with irrigating solutions for irrigation protocol for effective removal of smear layer which effect the penetration of endodontic sealers into the dentinal tubules. Methods: 32 mandibular premolar teeth were used. The biomechanical preparation was done till Protaper F3 size. Irrigation was done with 2.5 mL sodium hypochlorite (NaOCl) solution after each inst...
https://www.ijrrjournal.com/IJRR\_Vol.5\_Issue.10\_Oct2018/Abstract\_IJRR0013.html, 2018
Background: Adherence of root canal sealer to root dentin is an important requirement as there is a direct relationship between the bond strength and sealing ability of a sealer. Ultrasonics has been widely used for irrigation and instrumentation purposes but its use for sealer activation has not been explored sufficiently. Aim: To evaluate the effect of ultrasonic activation of bioceramic root canal sealer on its push-out bond strength to root canal dentine. Methodology: The root canals of 80 roots of mandibular premolars were prepared with Ni-Ti rotary instruments under irrigation with 5% NaOCl and 17% EDTA. Samples were divided into two groups depending upon the mode of activation of sealer: Ultrasonic Activation (UA) and no activation (NA). Endosequence BC sealer was placed into the canals. In UA group, ultrasonic activation of the sealer was performed for one minute and canals were obturated. In group NA, no activation was performed and samples were obturated. After two weeks, 1±0.1mm thick slice of coronal and apical radicular third of specimens was subjected to push-out testing using Universal testing machine. Subsequently the slices were observed under stereomicroscope for failure mode analysis. Results: Data obtained was statistically analysed using independent t-test. Group UA demonstrated better bond strength than group NA both at coronal as well as apical levels. The mechanism of cavitation and acoustic streaming might be responsible for better adaptation to root dentin and subsequently better bond strength. Conclusion: Ultrasonic activation of bioceramic sealer results in its increased adherence to root dentin.
Saudi Endodontic Journal, 2020
Original Article INTRODUCTION Three-dimensional obturation is important to provide an impermeable, fluid-tight seal to prevent oral, and apical microleakage. [1] One important component of the obturation is the placement of sealer. Conventional hand placement techniques of root canal sealers involve the use of reamers, absorbent paper points, lentulo spiral, and gutta-percha cones. [2] The limitations of all the techniques are the inability of the sealer to penetrate into canal Introduction: The aim of this study was to compare the effect between different levels of ultrasonic tip activation on the depth of epoxy resin-based sealer (AH plus) dentinal tubules penetration. Materials and Methods: Extracted single-rooted premolars (n = 60) were randomly allocated into three groups and instrumented following the same protocol. Group 1 (control), the sealer was mixed with 0.1% Rhodamine B dye and placed using size 20 K-file. In Group 2, the sealer was passively activated using ultrasonic tip (ISO 25) 10 s mesiodistally and buccolingually at 2 mm from the apex. In Group 3, the sealer was activated in a similar manner at 4 mm from the apex. Samples were sectioned horizontally at 2 mm, 4 mm, and 6 mm from the apex and analyzed using a stereomicroscope for tubular dentine sealer penetration. The cross-sectional area (μm 2) was measured with software to get the percentage of sealer penetration, and presences of voids were recorded. Results: Significant lesser percentage of sealer penetration into the dentinal tubules was observed between the control group and both the experimental groups (P = 0.00) at 2 mm, 4 mm, and 6 mm from the apex. There was no significant difference in the percentage of sealer penetration into the dentinal tubules between both the experimental groups (P > 0.05). The presence of voids between all groups was not statistically significant (P > 0.05). Conclusion: Passive ultrasonic activation of sealer placement resulted in deeper sealer penetration into the dentinal tubules even at a higher level of tip activation (4 mm).
In vivo evaluation of root canal sealer distribution
Journal of Endodontics, 1995
The effectiveness of sealer placement and its distribution in the prepared root canal system by an energized ultrasonic file was evaluated in vivo. One hundred patients had sealer placed into prepared root canals with either the master gutta-percha cone or an ultrasonic file. Before placement of sealer with the file, canals were irrigated, debrided, and flushed with water for 10 s and an energized #20 ultrasonic file at 1.0 mm from the working length. Canals were obturated with gutta-percha using lateral condensation, and evaluations were based on the presence or absence of sealer-filled accessory canals. Chi-square analysis showed that a statistically significant difference existed in the number of radiographically visible accessory canals filled when the ultrasonic file was used to place the sealer.
Comparison of Dentinal Tubular Penetration of Three Bioceramic Sealers
International Journal of Applied Pharmaceutics, 2020
Objective: The main objective of endodontic treatment is to remove microorganisms from the root canal space and prevents reinfection. Deep penetration of the dentinal tubule is advantageous because it increases the contact area between the root canal filling material and dentin, thereby increasing the sealing quality of the entire root canal system. Bioceramic sealers are biocompatible, nontoxic, non-shrinking, hydrophilic, and stable, do not expand during setting, and can form hydroxyapatite, which then forms chemical bonds with dentin to compare the abilities of three types of bioceramic-based sealers to penetrate the dentinal tubules.Methods: Obturation used three types of bioceramic sealers. Group 1 (calcium phosphate silicate), Group 2 (a mixture of tricalcium silicate and resin), and Group 3 (pure tricalcium silicate) were observed using a scanning electron microscope and measurement of the penetration distance with ImageJ.Results: The bioceramic sealers had statistically sign...
Journal of Liaquat University of Medical & Health Sciences
June-December 2018. Fresh extracted 32 teeth were included and their crowns were sectioned at Cemento-Enamel Junction/service to obtain 12mm standard root length. The access cavity was gained using endodontic instruments. The teeth were divided into two groups, in Group A (n=16) MTA Bioceramic and in Group B (n=16) AH Plus was used as root canal sealers by single cone obturation technique. The obturated specimens were stored in humid conditions for one week. Analysis was done using SPSS version 20. RESULTS: Mean and standard deviation of dye leakage for Bioceramic were 2.25±0.9 whereas for AH Plus was significantly lower, 1.19±0.75. Teeth included in Group A were central incisors 37.5%, lateral incisors 18.8%, canine 12.5%, lower first premolars 12.5% and second premolars 6.3%, whereas Group B consisted of central incisors 18.8%, lateral incisors 12.5 %, canine 12.5%, lower first premolars 18.8 % and second premolars 6.3%. Dye leakage was higher in Group A compared to Group B with a significant P-value < 0.001. CONCLUSION: It can be concluded based on this study that AH Plus offers a better apical seal as compared to Bioceramic-based MTA Fillapex sealers.
SciDoc Publishers, 2020
Objectives: This study aims to evaluate the effectiveness of ultrasonic activation and BC gutta-percha points in the obturation of root canals. Materials and Methods: The study sample consisted of 40 single rooted lower premolars extracted for orthodontic reasons. Root canal treatment was done after decoronation and equalization the length of the roots. The sample was divided randomly into four groups (n = 10) depending on whether or not ultrasonic activation used and the type of gutta-perhapoints: group 1: ultrasonic activation used for EndoSequence BC sealer are used with traditional gutta-percha (UAGP), group 2: ultrasonic activation used for EndoSequence BC sealer are used with BC gutta-percha (UABC), group 3: ultrasonic activation was not used for BC sealer with traditional gutta-percha (NAGP). group 4: ultrasonic activation was not used with BC gutta-percha (NABC). After filling the teeth, a microleakage test with 2% methylene blue was performed for all samples. Then, all samples were studied on a 20X stereomicroscope after clearing them. The data was subjected to statistical analysis using one-way ANOVA Test with a p value (p<0.05) and the confidence level (95%). Results: There were statistically significant differences in the average amount of microleakage (mm) between the filling groups with ultrasonic activation and the non-activation groups. While using endosequence BC points showed no significant differences. Conclusion: Ultrasonic activation of EndoSequence BC sealer improves root filling quality and reduces microleakege percentage. While using endosequence BC points showed no reduction in the microleakage level.