Comparative Evaluation Of Microleakage Research Articles

Comparative evaluation of microleakage and penetration depth of ACP containing pit and fissure sealant and flowable composite - An in-vitro study.

The present in vitro study evaluated and compared the microleakage and penetration depth of ACP containing pit and fissure sealant with flowable composite. Sixty extracted non-carious premolars were categorized into four groups of 15 samples each. Sealant was applied after the Occlusal surfaces of the sample teeth were prophylactically treated with pumice slurry. Later, the teeth were thermocycled and immersed in methylene blue for a period of 24 hours. The samples were buccolingually sectioned and analysed under a stereomicroscope. Statistical analysis was carried out to compare the microleakage and depth of penetration. Flowable nanocomposite gave comparable results with that of the sealant in terms of microleakage. Nano-hybrid flowable composite performed better with respect to depth of penetration between tested materials with the difference being statistically significant. Flowable nanocomposite can be considered as a promising substitute for sealing fissures and thus can be endorsed to caries susceptible pediatric patients. Key words:Depth of Penetration, Sealants, Microleakage.

Deep margin elevation in class II cavities: A comparative evaluation of microleakage and interface integrity using confocal laser microscopy and scanning electron microscopy

Aim: This study aims to evaluate the microleakage between the gingival seat and base material and to assess the interface integrity between the base material and overlying composite in class II cavities restored using deep margin elevation. Materials and Methods: Thirty maxillary molars (n = 30) were taken, and class II cavities were prepared with a gingival seat extending below the cementoenamel junction. These teeth were divided into three groups for subgingival margin elevation using different materials: Group A (n = 10) – flowable composite, Group B (n = 10) – glass ionomer cement (GIC), and Group C (n = 10) – GIC with nanohydroxyapatite (GIC n-HAp). The remaining cavities were restored with bulk-fill composite. After undergoing 1000 thermocycling cycles, half of the samples were examined for microleakage using confocal laser microscopy, and the other half were assessed for interface integrity using scanning electron microscopy. Microleakage was statistically analyzed by one-way ANOVA, and interface integrity was analyzed by Kruskal–Wallis tests. Results: The study found that GIC n-HAp exhibited significantly lower microleakage between the base material and gingival seat than flowable composite and GIC. However, regarding interface integrity between the base material and bulk-fill composite, flowable composite, and GIC outperformed GIC n-HAp. Conclusions: Incorporating n-HAp into GIC effectively reduced microleakage at the dentin-base material interface. However, the interface integrity between GIC n-HAp and the composite poses a challenge.

Comparative evaluation of microleakage in glass hybrid resin, alkasite resin, and shock-absorbing rubber resin in primary molars– An in-vitro study

Background To evaluate and compare the microleakage of Glass hybrid resin (Equia Forte), Alkasite resin (Cention N), and Fluoride-releasing shock-absorbing rubber resin (Activa Bioactive) in Class V cavities of primary molars. Material and Methods Thirty freshly extracted human primary molar teeth with pre-shedding mobility were selected and a standard class V cavity was prepared on the buccal surfaces of all teeth. The teeth were divided into 3 groups of 10 samples each. The prepared cavities of all samples were restored with their corresponding restorative material. The teeth underwent thermocycling for 500 cycles and were then immersed in the toluidine dye solution. The depth of dye penetration scores between and within 3 groups was analyzed using the Kruskal Wallis One-way ANOVA test, followed by multiple comparisons with the Dunn-Bonferonni post hoc test. Results Cention N (alkasite resin) showed the least depth of dye penetration, which was highly statistically significant (p=0.000), followed by Activa Bioactive (Fluoride-releasing shock-absorbing rubber resin) and Equia Forte (Glass Hybrid resin). No samples showed depth involving the pulpal floor. Conclusion Cention N (alkasite resin) restorative material had the least microleakage and may be an excellent alternative material that provides a long-term clinical solution for the restoration of carious teeth with its improved marginal seal and reduced chances of microleakage. Clinical Significance Cention N may be an excellent alternative material that provides a long-term clinical solution for the restoration of carious teeth with its improved marginal seal and reduced chances of microleakage. Key Words: Activa Bioactive, Cention N, Equia forte, Microleakage, Resin cements

“Comparative Evaluation of Microleakage in Zirconia Crowns Cemented With Bioactive, Conventional Gic and Dual Cure Resin Luting Cements - An in Vitro Study”

“Comparative Evaluation of Microleakage in Zirconia Crowns Cemented With Bioactive, Conventional Gic and Dual Cure Resin Luting Cements - An in Vitro Study”

A comparative evaluation of microleakage in three different luting agents used for posterior full metal crown: An in vitro study

The purpose of the study was to evaluate and compare the microleakage at the margins of nickel – chromium full metal crowns cemented with Zinc Phosphate cement, glass ionomer cement. And resin cement.: thirty freshly extracted human molars were selected for the study. Standardized tooth preparation is done with the help of customized metal zig attached to dental surveyor. On prepared teeth castings were fabricated and devided into three groups for the three luting agents namely zinc phosphate cement – Harvard, Glass ionomer cement – Ketac Cem and Resin cement – Rely X U200, each containing 10 samples. After cementation the cemented specimens were stored in artificial saliva for 24 hours. The teeth were then thermocycled between 5°C and 50°C and then treated with 50% silver nitrate stain for 60 minutes. Samples were placed under 150 watt flood lamp for 5 minutes to allow proper fixation of unfixed stain. Then they were embedded in clear acrylic resin and sectioned twice longitudinally. The sections were observed under the stereomicroscope and stain penetration were recorded at tooth cement interfaces. The readings were tabulated and analyzed statistically using Mann-Whitney U test and Kruskal-Wallis H test. .Zinc phosphate cement showed significantly maximum microleakage as compared to glass ionomer cement and resin cement. Resin cement showed significantly less microleakage as compared to glass ionomer cement and zinc phosphate cement. Glass ionomer cement showed more microleakage as compared to resin cement but less as compared to zinc phosphate cement

Comparative Evaluation of Microleakage With Total-Etch, Universal (Self-Etch Mode), and Nano Adhesive Systems in Class V Composite Restorations: An In-Vitro Study.

The adhesion of bonding agents and their longevity are of interest to dentistry. Microleakage remains the major cause of composite restoration failures, which in turn depends on bonding between the restorative material and tooth substrate. The objective of this study is to evaluate and compare the microleakage with total-etch, universal, and nano adhesive systems in Class V composite restorations, utilizing a dye penetration method. Forty-five extracted premolars were included in the present study, and a Class V cavity on the facial surface of each tooth was prepared. The samples were divided into three groups of 15 teeth each depending on the bonding agents used, following which composite restoration was done. Specimens were thermocycled, and nail varnish was applied except around the restorations. Specimens were then immersed in 2% methylene blue for 24 hours and rinsed; sectioning was done and viewed under a stereomicroscope with 10X magnification. The mean microleakage score was reported to be significantly higher in the universal adhesive system in the self-etch mode (3.60 ± 0.55) when compared with the total-etch adhesive system (2.40 ± 0.55) and least in the nano adhesive system (1.20+.45) (p value <.05). The study findings revealed that nano adhesives showed lesser microleakage as compared to total-etch and universal adhesive systems. The study strengthens the findings that the nano adhesives have reduced microleakage, resulting in better marginal integrity and increased longevity of restoration. This study signifies that an eighth-generation bonding agent is reported to be better than the other bonding agents used in this study.

Comparative Evaluation of Microleakage and Shear Bond Strength of Glass Ionomer Cement, Composite, Resin Modified Glass Ionomer Cement Restorative Material: An In Vitro Study

Aim: Evaluation of microleakage and shear bond strength of glass ionomer cement, composite, resin modified glass ionomer Cement Restorative Material. Material and Method: Thirty freshly extracted non carious teeth, free of cracks and restorations, collected for the present in-vitro study. Teeth were divided in three equal group i.e. group A: Glass Ionomer Cement. Group B: Resin Modified Glass Ionomer Cement, Group C: Composite Resin. All groups' shear bond strengths were evaluated using a universal testing machine. A rod in the shape of a chisel was positioned close to the bonded restorative material and directly next to the flat dentinal surface. To debond the material, a cross head of universal testing machine at a speed of 0.5mm/min was employed. Then, Mega Pascal Units (MPa) were used to calculate the shear bond strength. To evaluate the microleakage two coats of nail polish were applied to the samples, leaving a 1 mm window around the cavity boundaries. A wet cotton pellet was placed over the restoration to avoid desiccation while the nail polish was being applied. Inverted teeth were submerged for 24 hours at 37°C under vacuum in a solution of 2% Rhodamine-B dye. Only the coronal part of the teeth were dyed to avoid dye leakage via the root apices. The surface-adhered dye was washed off the specimens in tap water after removing them from the dye solution, and nail polish was then removed with a BP blade. The teeth were sectioned longitudinally in a bucco-lingual direction through the center of the restorations using a water-cooled low-speed diamond disc. The section with the greater leakage was evaluated with a stereomicroscope at ×25 magnification to determine the extent of dye penetration at the occlusal and gingival margins by two evaluators who were blinded to the experimental groups. Result: Composite resin showed highest shear bond strength followed by Bond Strength of Resin Modified Glass Ionomer Cement and least with conventional glass ionomer cement. Microleakage was found lower in composite resin as compared to Resin modified glass ionomer cement and glass ionomer cement. Conclusion: It can be stated that Composite resin and Resin modified glass ionomer cement have good shear bond strength and lower microleakage as compared to Glass Ionomer Cement.

A Comparative Evaluation of Micro-Leakage in Fiber Post Luted and Core Buildup Performed with Two Different Resin Cements: An In vitro Study.

To compare the micro-leakages of fiber post luted and core buildup performed with ParaCore (Coltene) and LuxaCore (DMG) resin cement. Thirty-six single-rooted teeth were selected and treated with root canal treatment and fiber post cementation with two types of resin cement (LuxaCore and ParaCore). Samples were exposed to 500 cycles of thermocycling, immersed in 2% methylene dye and centrifuged and sectioned longitudinally, and checked under a stereomicroscope. LuxaCore and ParaCore showed a mean of 0.39250 mm and 0.47500 mm micro-leakage, respectively. There was a statistically non-significant difference seen with group 3 (LuxaCore) versus group 4 (ParaCore) (P > 0.05).

Comparative Evaluation of Microleakage in Hall's with SDF, Hall's, and Conventional Technique Using Different Luting Cements.

Thakur NS, Tyagi P, Tiwari S, et al. Comparative Evaluation of Microleakage in Hall's with SDF, Hall's, and Conventional Technique Using Different Luting Cements. Int J Clin Pediatr Dent 2023;16(1):16-21.

Comparative Evaluation of Microleakage in Class II Restorations Using Open- and Closed-Sandwich Techniques With Zirconomer as an Intermediate Material: An In-Vitro Study.

Aim To evaluate and compare the microleakage In class II restorations using open- and closed-sandwich techniques with zirconomer as an intermediate material. Material and method Twenty-six non-carious mandibular first molars were selected and randomly divided into two groups (groups 1 and 2 where n=13). A standardized Class II preparation was made with the cervical margin 1 mm below the cementum-enamel junction. Samples of group 1 were restored using the open-sandwich technique and samples of group 2 with the close-sandwich technique, and zirconomer was used as an intermediate restorative material. Following that, the restorations underwent 200 heat cycles with dwell times of 20 seconds at 5°C and 55°C. Dye penetration and scanning electron microscope (SEM) analysis using the replica approach were used to assess adaptation at the cervical margin.The data were statistically analyzed using the Paired T-test(p<0.05). Results Lower dye penetration was seen in the open-sandwich technique compared to the closed-sandwich technique (p<0.001). Conclusion When comparing the open-sandwich technique with the closed one, it was observed that less microleakage was seen in the open-sandwich technique as it has better marginal adaptation and fewer voids.

Evaluation of Coronal Micro-Leakage of Fiber Post with Different Luting Cements (In Vitro Study)

Evaluation of Coronal Micro-Leakage of Fiber Post with Different Luting Cements (In Vitro Study)

Comparative evaluation of microleakage around Yuseal and Fissurit F Pit and Fissure Sealants in permanent teeth

Background: Deep pits and fissures may cause food retention and lead to caries. For prevention of this, the fissures are sealed using sealants. For successful outcome, the ability of sealants to seal margins is important. The purpose of this in vitro study, is to compare microleakage of YuSeal and Fissurit F sealants. Aim and Objectives: To compare the microleakage around Yuseal and Fissurit F sealants in permanent teeth. 1) To assess degree of microleakage around Yuseal used as sealant. 2) To assess degree of microleakage around Fissurit F used as sealant. 3) To compare microleakage around Yuseal and Fissurit F used as sealant. Materials &amp; Methods: 30 selected teeth were designated to groups A and B, with each group consisting of 15 samples. Nail lacquer was coated on all the surfaces except occlusal surface and teeth were inserted in acrylic. 37% phosphoric acid was applied on both the groups. Fissurit F and Yuseal was applied to the teeth in (group A) and (group B), respectively. For 24 hours, the teeth were kept in 1 % methylene blue dye at 37°C. Through the sealed fissures, the teeth were sectioned buccolingually.

Comparative evaluation of micro-leakage and shear bond strength between a self adhesive flowable composite resin and self etch based flowable composite restorative material

Background: An in vitro evaluation and comparing the microleakage and shear bond strength between a self- adhesive flowable composite resin (Dyad Flow) and self-etch based flowable composite restorative material ( Nano Filtek Z 350XT) Materials and methods: A total of sixty specimens were prepared from extracted teeth, which were divided into two groups. For microleakage analysis, Group I consisting of thirty teeth which were further divided into two subgroups of fifteen teeth each that is Group IA and Group IB, on which standard class V cavity was prepared and restored with Dyad Flow and Nano Filtek Z 350XT respectively. The prepared specimens were immersed in 0.6% aqueous Rhodamine B dye for 24 hours. The sectioned samples were examined under a Confocal Microscope at 10 X magnification and microleakage scores were analyzed statistically using Mann-Whitney U test. For shear bond strength evaluation, Group II consisting of thirty teeth, which were subdivided into two subgroups of fifteen teeth each that is Group IIA and Group IIB.

Comparative Evaluation of Microleakage Under APC Plus, APC Flash-Free and Conventional Stainless Steel Brackets: An In Vitro Study

Aim: The aim of the study was to compare and evaluate the microleakage under the Adhesive Precoated Plus (APCP), APC Flash-Free (APCF), and conventional stainless steel (SLS) brackets on the occlusal and gingival sides of the bracket base. Materials and Methods: 66 extracted premolar teeth were collected and divided equally into 3 groups. Bonding was done with APCP, APCF, and conventional SLS brackets using Transbond XT. After bonding, the samples were stored in a distilled water and thermocycled for 3000 cycles, followed by immersion in a 2% methylene blue for 24 h. After cleaning, the teeth were mounted in acrylic and sectioned longitudinally at about the center of the bracket in a buccolingual direction. Microleakage was recorded using a stereomicroscope. Results: Kruskal–Wallis H test showed a significant difference ( P &lt; .005) in the microleakage scores between the 3 groups. Mann–Whitney U test showed a significant difference between group 1 to group 2 and group 1 to group 3 ( P &lt; .005) and an insignificant difference between group 2 and group 3 on the occlusal side ( P = .116) and on the gingival side ( P = .063). Conclusion: Conventional SLS bracket group exhibited greater microleakage scores at both occlusal and gingival sides, when compared with APCP and APCF groups.

Comparative Evaluation of Microleakage between Three Adhesive Agents

Comparative Evaluation of Microleakage between Three Adhesive Agents

Comparative Evaluation of Microleakage of Three Different Restorative Materials (Cention N, Zirconomer Improved and Glass Hybrid Restorative System) in Class V Cavity Restoration Using Stereomicroscope: In vitro Study

Aim and Objective: Microleakage is the most important factor responsible for the destruction of restoration margins. The aim of this study was to compare and evaluate the microleakage of three different restorative materials namely glass hybrid restorative system, zirconomer improved and Cention N under stereomicroscope.&#x0D; Materials and Methods: In this in-vitro experimental study, 45 Class V cavities were prepared on the buccal surface of maxillary premolars. The prepared cavities were divided into three groups for restoration with Cention N(group I), Zirconomer Improved(group II), Equiaforte (group III). All the samples were thermocycled for 500 cycles between 5-55°C initially and then immersed in 0.5% methylene blue for 24 hours before sectioning. All the sectioned samples were observed for microleakage under a stereomicroscope.&#x0D; Results: Data was analyzed using one way ANOVA test for comparison between three groups and the result revealed statistically significant difference between the groups(p&lt;0.05). Post hoc Tukey test was used for intergroup comparison and it was observed that both Cention and Equiaforte are inferior to Zirconomer improved in terms of microleakage (p&lt;0.05).&#x0D; Conclusion: Zirconomer improved exhibited lower microleakage when compared to Cention N and Equiaforte cements.

A comparative evaluation of microleakage and dentin shear bond strength of three restorative materials

Aim To evaluate the microleakage and dentin shear bond strength of two glass containing restorative materials, Zirconomer and Cention N, and to compare them with a conventional glass ionomer cement (GIC) (GC Fuji II). Materials and methods Zirconomer (Shofu) and GC Fuji II (GC Corp.) are self-curing GICs whereas Cention N (IvoclarVivadent) also offers a self-curing option as well as the option of light-curing using an adhesive. For evaluating microleakage, standardized class V cavities were prepared on the buccal surface of 30 premolars. The cavities were restored with one of the three restorative materials (n = 10) according to manufacturers’ instructions, Cention N being used with an adhesive (Te-EconomBond, IvoclarVivadent) and in the light-curing mode. After restoration and thermocycling, the microleakage assessment was made under a stereomicroscope at 40x magnification following immersing of the teeth in 0.5% methylene blue dye and buccolingual sectioning. For evaluating dentin shear bond strength, the occlusal surface of the 30 premolars was ground flat, and cylinders of the three restorative materials (n = 10) were bonded to the occlusal surface according to manufacturers’ instructions, Cention N being used with an adhesive (Te-EconomBond, IvoclarVivadent) and in the light-curing mode. Following 24-h storage at 100% humidity, the dentin shear bond strength was measured and the fracture mode was determined under a stereomicroscope at 10× magnification. Data were statistically analyzed using Mann–Whitney and Scheffé tests (p = .05). Results Cention N displayed significantly less microleakage than did Zirconomer and GC Fuji II at occlusal as well as the gingival margins. Dentin shear bond strength varied significantly between 5.15 and 9.89 MPa with Cention N showing the highest bond strength and GC Fuji II the lowest. Conclusion In this in vitro evaluation, Cention N consistently performed better than the conventional GIC (GC Fuji II) as well as Zirconomer.

An in Vitro Comparative Evaluation of Microleakage of Conventional Gic &amp; New Modified Glass Ionomer Cement Nanozirconia Silica Hydroxyapatite Restorative Material

An in Vitro Comparative Evaluation of Microleakage of Conventional Gic &amp; New Modified Glass Ionomer Cement Nanozirconia Silica Hydroxyapatite Restorative Material

Comparative Evaluation of Microleakage of Two Step Etch and Rinse, Two Step Self Etch and Universal Dentin Bonding

Introduction: Dental composites have been extended as the selected material in most of recent restorations. However, the contraction caused by their polymerization remains the main issue. The stress made by this contraction could cause the divide of composite-tooth junction to be severed. Bacteria, liquids, molecules or ions could cross the gap made between the repair and the cavity wall which this process is called micro-leakage. Micro-leakage causes leakage, tenderness, secondary decay, damage to the pulp, marginal discoloration, which finally results in restoration failure. It can be said that the success of resin restoration material depends perfectly on the ability of the enamel and dentin bonds. This research aims to determine the best bonding to decline micro-leakage. Materials and Methods: In this research, 48 human premolar teeth were prepared without decay, restoration, fracture and wear. Each class V standard cavity was prepared on buccal and lingual surfaces. The shaved teeth were randomly divided into 4 groups including 12 ones. They were polished after restoration. All samples of the 4 groups were subjected to the heat cycling. Apex was sealed with adhesive wax and all parts of the tooth were covered with two layers of nail polish. The samples were incubated in 0.5% Fuchsin solution for 24 hours at room temperature. After that, they were washed under the faucet and the nail polish was removed from tooth surface. Teeth were divided into two mesio distal sections by a cutting machine. Samples were observed by stereo microscope. samples were evaluated based on the micro-leakage grading. Kruskal-Wallis, Mann-Whitney and Will Coxson tests were used to evaluate the results. Results: In each group, 48 cavities were examined. The results of this research showed that in none of enamel surface of bindings, micro-leakage was observed. In the dentine area, the least amount of micro-leakage was related to the Clearfil SE Bond. There was no statistically significant difference between the micro-leakage of Clearfil SE Bond and G Premio Bond by Self Etch method (P value&gt; 0.05). Also, there was no significant difference between micro-leakage of G_Premio Bond by Self Etch and G_Premio Bond by Etch and Rinse method. The micro-leakage of Adper Single Bond 2 was significantly higher in the dentin rather than the other groups. Conclusions: In dentine level, the highest micro-leakage was related to Adper Single Bond 2 bonding and the least one was in Clearfil SE Bond and G Premio Bond by Self Etch method.

A Comparative Evaluation of Microleakage between Resin-Modified Glass Ionomer, Flowable Composite, and Cention-N in Class V Restorations: A Confocal Laser Scanning Microscope Study.

Background:Microleakage is a concern while restoring cervical lesions. Many products have attempted to minimize the interfacial gap between the tooth and restoration, the main pathway of microleakage.Aims and Objective:To compare and evaluate the microleakage in Class V cavity restored with nanohybrid flowable composite, Resin modified Glass Ionomer and Cention N.Method:Class V cavities were prepared on mandibular premolars on buccal surface with their occlusal margin placed in enamel and the gingival margin in dentin. The teeth were randomly assigned to three groups of 20 teeth each and restored with Flowable composite , Resin Modified GIC and Cention N. Samples were immersed in 0.5% Rhodamine dye, sectioned and microleakage measured using Confocal Laser Scanning Microscopy. Statistical analysis was done using Oneway ANOVA Bonferroni's test and Kruskal Waliis test.Results:The average depth of penetration of dye and scoring of depth were noted. On comparing dye penetration values between groups, RMGIC is compared with Flowable composite and Cention N, statistically significant result was obtained suggesting lesser dye penetration in RMGIC group (P < 0.001) where other comparison did not.Conclusion:RMGIC showed significantly less microleakage compared to the other two restorative materials used in the study and enamel margin of all restorations showed lesser microleakage than dentin margin.