An in vitro Evaluation of Microtensile Bond Strength of Resin-based Sealer with Dentin Treated with Diode and Nd:YAG Laser

2013 ◽  
Vol 14 (2) ◽  
pp. 183-187 ◽  
Author(s):  
G Anil Kumar ◽  
Maneesha Das ◽  
Sindhu Ramesh ◽  
Surendranath Garapati
Keyword(s):  
Bond Strength ◽  
Nd:Yag Laser ◽  
Root Canal ◽  
Smear Layer ◽  
Control Group ◽  
Microtensile Bond Strength ◽  
Group Iii ◽  
Group I ◽  
Ah Plus

ABSTRACT Background Smear layer is a negative factor which prevents adhesion of the filling material to the dentinal walls. Recent advances in dental research have incorporated lasers as a potential adjunct in root canal treatment by removing the smear layer before filling the root canal system, enhancing the adhesion of sealers to dentin and improving the sealing ability. Aim To evaluate the microtensile bond strength of AH-Plus resin-based sealer to dentin after treatment with 980 nm diode and 1,064 nm neodymium-doped:yttrium aluminum garnet (Nd:YAG) laser in vitro. Materials and methods Thirty specimens prepared for three groups namely group I (control), group II (980 nm diode–lased specimens) and group III (Nd:YAG–lased specimens). One tooth from each group was observed under scanning electron microscope for evaluation of intracanal root dentin morphology. Remaining specimens were used for making microsections by hard tissue microtome. Specimens for groups II and III were lased with 980 nm diode and 1,064 nm Nd:YAG laser. AH Plus sealer was applied onto specimens and mounted onto Instron universal testing machine for microtensile bond strength testing. Results were subjected to statistical analysis using one-way analysis of variance (ANOVA) and Tukey's test. Results Group III Nd:YAG had maximum mean microtensile bond strength values (11.558 ± 0.869), followed by group II diode (9.073 ± 0.468) and group I control (6.05 ± 0.036). Statistically significant differences were seen among all the groups. SEM analysis shows removal of smear layer in both groups II and III. Conclusion Both Nd:YAG and diode laser were more effective than control group in improving the microtensile bond strength of AH Plus sealer to dentin. Clinical significance Lasers have the potential to increase the adhesiveness of root canal sealer to dentin surface, thereby improving the quality of root canal obturation. How to cite this article Maneesha D, Anil KG, Sindhu R, Surendranath G, Deepak S. An in vitro Evaluation of Microtensile Bond Strength of Resin-based Sealer with Dentin Treated with Diode and Nd:YAG Laser. J Contemp Dent Pract 2013;14(2): 183-187.

An in vitro Comparison of the Effect of Three Different Endodontic Medicaments on the Bond Strength of a Resin-based Endodontic Sealer to the Root Canal Dentin

2016 ◽  
Vol 8 (1) ◽  
pp. 28-32
Author(s):  
Vasundhara Shivanna ◽  
Ravi Bhargavi
Keyword(s):  
Bond Strength ◽  
Root Canal ◽  
Control Groups ◽  
Group I ◽  
Ah Plus ◽  
Bond Strengths ◽  
Root Canal Dentin ◽  
And Control ◽  
Push Out

ABSTRACT Objectives The aim of this study was to compare and evaluate the effect of calcium hydroxide [Ca(OH)2], 2% chlorhexidine (CHX) gel, and propolis when used as intracanal medicaments on the bond strength of a resin-based sealer (AH Plus Jet; Dentsply DeTrey, Konstanz, Germany) to the root dentin. Materials and methods Sixty freshly extracted single-rooted human teeth were utilized for this study and the crowns were decoronated. The root canals were instrumented and randomized into four groups according to the medicament used: Group I: Control; group II: Ca(OH)2; group III: CHX; group IV: Propolis. The specimens were stored for 10 days in 100% humidity at 37°C, and the intracanal dressings were removed by rinsing with 10 mL of 17% ethylenediaminetetraacetic acid followed by 10 mL of 2.5% sodium hypochlorite, then obturated with gutta-percha and AH Plus Jet sealer. A push-out test to measure the bond strength between the root canal dentin and the sealer was done. Two-way analysis of variance and Tukey’s post hoc pairwise tests were used for statistical analysis. Results The use of intracanal medicaments had shown to significantly influence the push-out bond strengths of the resin sealer used (p < 0.05). At coronal and middle thirds, there was no significant difference in bond strengths among all the four groups (p > 0.05). At apical third, the mean bond strength value for propolis group was significantly superior when compared with the other three groups (p < 0.05). The CHX group showed higher bond strength values at apical third compared with Ca(OH)2 and control groups, but it was not significant (p > 0.05). Conclusion Propolis showed superior push-out bond strength than CHX, Ca(OH)2, and control groups at apical third, while no significant differences were observed among all the groups at coronal and middle thirds. How to cite this article Shivanna V, Bhargavi R. An in vitro Comparison of the Effect of Three Different Endodontic Medicaments on the Bond Strength of a Resin-based Endodontic Sealer to the Root Canal Dentin. CODS J Dent 2016;8(1):28-32.

scholarly journals Effect of Triple Antibiotic Paste on The Bond Strength of Epoxy and Methacrylate Resin–Based Sealers to Root Canal Dentine

2021 ◽  
Author(s):  
Fereshte Sobhnamayan ◽  
Alireza Adl ◽  
Mahdi Sedigh-Shams ◽  
Hossein Mirkhaghani
Keyword(s):  
Bond Strength ◽  
Analysis Of Variance ◽  
Root Canal ◽  
Failure Modes ◽  
Treatment Modalities ◽  
Control Group ◽  
Triple Antibiotic Paste ◽  
Ah Plus ◽  
Post Hoc

Abstract Background: Triple antibiotic pastes (TAP) has gained popularity as a root canal medicament in regenerative endodontic procedures and other endodontic treatment modalities. As this medicament changes the chemical structure of dentine, it may affect the bond strength of endodontic sealers to radicular dentine. This study aimed to evaluate the effect of TAP on the bond Strength of epoxy and methacrylate resin- based sealers to root canal dentine.Methods: In this in vitro study, eighty single-rooted human mandibular premolars were prepared using ProTaper rotary system. The specimens were randomly divided into a control group (without intracanal dressing) and an experimental group receiving TAP (n = 40). The intracanal dressing was removed after three weeks. Then samples of each group were randomly divided into four subgroups (n = 10) and obturated with gutta-percha and different resin-based sealers. G1: AH Plus, G2: Syntex, G3: EndoREZ, G4: MetaSEAL. After one week, 16 Slices of 1±0.1 mm thickness were obtained from the midroots of teeth in each subgroup and a push-out test was used to measure the bond strength. Slices were examined using a stereomicroscope at 30× to determine the mode of failure. The data were analyzed using two-way analysis of variance, one- way analysis of variance and Tukey post hoc tests (α = 0.05).Results: Compared to control group, TAP significantly increased the bond strength of MetaSeal and EndoREZ (p<0.05). In the control group, epoxy resin- based sealers showed higher bond strength compared to methacrylate ones (p=0.00). In TAP group, Syntex and EndoREZ showed significantly the greatest and the lowest bond strengths respectively (p<.05). The analysis of failure modes revealed a predominance of mixed failures in all groups except for Syntex group in which most failures were cohesive.Conclusions: TAP significantly increased the bond strength of methacrylate resin- based sealers.

scholarly journals Effect of Blood Contamination and Decontamination Procedures on the Microtensile Bond Strength of a New Self-etch Adhesive: An in vitro Study

2017 ◽  
Vol 6 (2) ◽  
pp. 80-83
Keyword(s):  
Bond Strength ◽  
Bonding Agent ◽  
Tooth Surface ◽  
Control Group ◽  
Blood Contamination ◽  
Microtensile Bond Strength ◽  
Air Drying ◽  
Group I ◽  
Self Etch

ABSTRACT Aim The aim of the study was to evaluate the effect of blood contamination and decontamination procedures on the microtensile bond strength of a new self-etch adhesive before and after curing. Materials and methods A total of 90 human extracted mandibular molars were stored in 0.5% thymol solution and distilled water. Midcoronal sections were obtained using a diamond disk and the dentin surface was ground with 320 grit SIC abrasive paper. Universal self-etch adhesive (3M ESPC) and Filtex Z-250 resin composite were used. The dentin specimens were randomly divided into nine groups: Control group, group I—blood contamination before curing, group II—blood contamination before curing followed by air drying, group III—blood contamination before curing followed by rinsing with water and air drying, group IV—blood contamination before curing followed by rinsing with water, air dry, and reapplication of bonding agent, group V—blood contamination after curing, group VI—blood contamination after curing followed by air dry, group VII—blood contamination after curing followed by rinsing with water and air drying, group VIII—blood contamination after curing followed by rinsing with water, air dry, and reapplication of bonding agent. The microtensile bond strength was measured by universal testing machine and the data were analyzed by one-way analysis of variance (ANOVA) followed by Tukey's post hoc test. Results The contamination groups (I, V) showed the least bond strength followed by the decontamination groups (II, III, VI, VII). The reapplication groups (IV, VIII) restored the bond strength equal to control group. Clinical significance A contamination-free area is required for adequate adhesion. It is important to rule out measures to prevent and manage contamination, so as to achieve durable seal between composite resin and tooth surface. How to cite this article Shaikh A, Hegde V, Shanmugasundaram S. Effect of Blood Contamination and Decontamination Procedures on the Microtensile Bond Strength of a New Self-etch Adhesive: An in vitro Study. Int J Experiment Dent Sci 2017;6(2):80-83.

scholarly journals Comparative evaluation of Fracture Resistance of Endodontically Treated Teeth Obturated with Pozzolan-based MTA Sealer and Epoxy Resin-based Sealer: An in vitro Study

2017 ◽  
Vol 8 (1) ◽  
pp. 37-40 ◽  
Author(s):  
Sree Theja Upadhyay ◽  
Tina Puthen Purayil
Keyword(s):  
Epoxy Resin ◽  
Root Canal ◽  
Fracture Resistance ◽  
Comparative Evaluation ◽  
In Vitro Study ◽  
Endodontically Treated Teeth ◽  
Group Iii ◽  
Group I ◽  
Ah Plus

ABSTRACT Aim To evaluate and compare the effect of epoxy resin-based sealer and a pozzolan-based mineral trioxide aggregate (MTA) sealer on the fracture resistance of endodontically treated teeth. Materials and methods Thirty single-rooted mandibular premolars were decoronated to a standardized root length of 15 mm. ProTaper rotary files up to a master apical file size of F3 were used for cleaning and shaping the root canals followed by 2.5% sodium hypochlorite irrigation. The teeth were randomly divided into three groups (n = 10 each), and the obturation was completed using gutta-percha with Endoseal MTA (group I) and AH Plus (group II) as root canal sealers. Group III served as control (instrumented and unfilled). Each specimen was then subjected to fracture testing by using a universal testing machine at a crosshead speed of 1.0 mm/minute until fracture. The force required to fracture each specimen was recorded and the data were subjected to statistical analysis using one-way analysis of variance (ANOVA), followed by pairwise comparison using post hoc Games-Howell test (p < 0.05). Results The fracture resistance of groups I and II were significantly higher than those of group III. No significant difference in the fracture resistance was observed between group I (Endoseal MTA) and group II (AH Plus) groups. Conclusion It can be concluded that the new root canal sealer, Endoseal MTA, is able to reinforce the tooth against fracture as good as AH Plus. Clinical significance Endoseal MTA is a sealer for the reinforcement of endodontically treated teeth. How to cite this article Upadhyay ST, Purayil TP, Ginjupalli K. Comparative evaluation of Fracture Resistance of EndodonticallyTreated Teeth Obturated with Pozzolan-based MTA Sealer and Epoxy Resin-based Sealer: An in vitro Study. World J Dent 2017;8(1):37-40.

Analysis of surface conditioning methods on core-veneer bond strength of CAD/CAM zirconia restorations

2020 ◽  
pp. 1-11
Author(s):  
Anip K. Roy ◽  
Govind N. Prasad ◽  
Tushar V. Bhagat ◽  
Saurabh Chaturvedi ◽  
Vishwanath Gurumurthy ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Bond Strength ◽  
Shear Bond Strength ◽  
Group Iv ◽  
Control Group ◽  
Group Iii ◽  
Surface Conditioning ◽  
Group I ◽  
Alumina Particles ◽  
Scanning Electron

BACKGROUND: The increased strength of zirconia has resulted in its widespread application in clinical dentistry. Nevertheless, the fracture of veneering porcelains remains one of the key reasons of failure. OBJECTIVE: The objective of this study was to compare and analyze the influence of surface conditioning methods on the core-veneer bond strength of zirconia restorations. METHODS: Thirty specimens of zirconia core with sizes 10 × 5 × 5 mm were layered with porcelain of sizes 5 × 3 × 3 mm. On the basis of different surface conditioning methods, four groups were made: Group I: abrasion with airborne alumina particles of 110 μm size, Group II: sandblasting with silica coated alumina particles of 50 μm in size, Group III (modified group): alteration with a coating of zirconia powder prior to sintering, and Group IV (control group): metal core specimens. The shear force of all specimens was tested using a universal testing machine with a 0.5 mm/min crosshead speed. One-way analysis of variance (ANOVA) and Tukey’s post hoc pair wise comparison (p= 0.05) were performed to analyze the shear bond strength. A scanning electron microscope was used to assess the fractured specimens. RESULTS: A statistically significant difference was noted between the groups. The mean value of shear bond strength was 40.25 MPa for Group I, 41.93 MPa for Group II, 48.08 MPa for Group III and 47.01 MPa for Group IV. CONCLUSIONS: The modified zirconia group and control group demonstrated a significantly higher mean bond strength than that of Group I, where airborne particle abrasion was used. The scanning electron microscope showed that cohesive fracture in the porcelain veneers was the main problem of failure in altered zirconia. The modified zirconia specimens in Group III demonstrated significantly improved values of shear bond strength.

scholarly journals Assessment of shear bond strength of brackets bonded by direct and indirect techniques: an in vitro study

2012 ◽  
Vol 17 (4) ◽  
pp. 1-7 ◽  
Author(s):  
Roberto Hideo Shimizu ◽  
Karlos Giovani Grando ◽  
Isabela Almeida Shimizu ◽  
Augusto Ricardo Andriguetto ◽  
Ana Cláudia Moreira Melo ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Adhesive System ◽  
Vitro Study ◽  
Group Iii ◽  
Indirect Bonding ◽  
Group I ◽  
Group Ii

OBJECTIVE: This in vitro study was designed to evaluate the shear bond strength (SBS) of orthodontic metal brackets bonded by direct and indirect techniques. METHODS: Thirty healthy human maxillary premolar teeth were used. The teeth were divided into three groups of 10 teeth each: Group I - indirect bonding with SondhiTM Rapid-Set system (3M/Unitek), Group II - indirect bonding with TransbondTM XT adhesive system (3M/Unitek) and Group III - direct bonding with TransbondTM XT adhesive system (3M/Unitek). After bonding and obtaining the specimens for the study, the specimens were subjected to SBS testing in a universal testing machine (Emic, model DL-500). The Kolmogorov-Smirnov test was applied to ascertain that the data had a normal distribution and the Bartlett test to check whether there was homogeneity of variance. One-factor analysis of variance was performed and, subsequently, Tukey's test for paired means. A 5% significance level was adopted. RESULTS: The results of Group I were 67.6 (N) and 5.9 (MPa); Group II, 68.9 (N) and 6.1 (MPa) and Group III (control), 92.5 (N) and 8.1 (MPa). CONCLUSION: It can therefore be concluded that the means for Group III were significantly higher compared with Groups I and II in both Newton (N) and Megapascal (MPa) values. The means attained by the indirect bonding technique used in Groups I and II, however, exhibited no statistically significant differences.

scholarly journals Anti-allergic Activity of 70% Ethanol Extract of Strawberries in Ovalbumin Induced Male Mice

2020 ◽  
Vol 5 (3) ◽  
pp. 92-97
Author(s):  
Siska ◽  
Diene Roufiani ◽  
Ema Dewanti
Keyword(s):  
Ethanol Extract ◽  
Control Group ◽  
Fruit Extract ◽  
Antiallergic Activity ◽  
Group Iii ◽  
Skin Contact ◽  
Group I ◽  
And Control ◽  
Control Group Group

Anaphylaxis is the most common allergic reaction triggered by allergens such as insect poisons, food, and drugs through skin contact, injection, or inhalation. In vitro previous research showed that strawberries fruit have activity as antioxidant, anticancer, anti-inflammation, and anti-allergic. The research aimed to determine the antianaphylaxis strawberry fruit extract in mice (Balb/C strain) with ovalbumin-induced.  Twenty-four Balb/C strain mice were divided into six groups (n=4). Group I and II as a normal and control group. Group III till VI as a treatment group was given cetirizine dose 0.042 mg/20 g BW and strawberry extract doses 0,68; 1,36; and 2,72 mg/20 g BW, respectively. This research showed that 70 % of ethanol extract of strawberries fruit have antiallergic activity in response to active cutaneous anaphylaxis. 70% ethanol extract of strawberries doses 2.72 mg/20 g BW had similar antiallergic activity compare with cetirizine. The conclusion of this study showed that strawberries fruit extract could be developed as an alternative medicine to anti-anaphylaxis or anti-allergic.

scholarly journals Comparative Evaluation of Apical Sealing Ability of Different Obturation Techniques by Confocal Microscopy: An In Vitro Study

2020 ◽  
Vol 8 (02) ◽  
pp. 55-59
Author(s):  
Reetu Arora ◽  
Yogesh Kumar ◽  
Neetu Jindal ◽  
Renu Aggarwal ◽  
Kavneet Takhar
Keyword(s):  
Root Canal ◽  
Negative Control Group ◽  
Positive Control ◽  
Negative Control ◽  
Group Iv ◽  
Control Group ◽  
Group Vi ◽  
Group V ◽  
Group Iii ◽  
Group I

Abstract Introduction The aim of obturation in the root canal is to completely seal the canal space to eliminate all the portals of entry and exit between root canal and periodontal space. Various techniques have been developed to achieve a hermetic seal. Materials and Methods As many as 150 extracted human maxillary central incisors were taken for the study. Biomechanical preparation was done up to F5 protaper file. According to different obturation techniques, samples were divided into six groups, keeping 30 samples in experimental and 15 samples in control groups. Group I–Lateral Condensation, Group II–Thermafil, Group III–Beefill, Group IV–GuttaFlow, Group V–Positive Control group, Group VI–Negative Control group. After obturation, the samples were immersed in 2% Rhodamine-B dye for 24 hours. Each sample was longitudinally sectioned to examine under confocal laser scanning microscope. Statistical Analysis The results were evaluated with ANOVA and posthoc Tukey honest significant difference (HSD) comparison test. Results The mean values of dye penetration of different groups were Group I (Lateral Condensation) 1.51 ± 0.451, Group II (Thermafil) 0.918 ± 0.399, Group III (Beefill) 1.30 ± 0.559. Group IV (GuttaFlow) 0.655 ± 0.396, Group V (Positive Control group) 1.96 ±0.046, Group VI (Negative Control group) 0 ± 0. The lowest mean value of apical microleakage was found in GuttaFlow amongst all experimental groups. Conclusion It can be concluded that the GuttaFlow obturating material exhibited better apical sealing ability with canal walls.

scholarly journals Effectiveness of EDTA and EDTA-T brushingm on the removal of root surface smear layer

2003 ◽  
Vol 17 (4) ◽  
pp. 319-325 ◽  
Author(s):  
José Eduardo Cezar Sampaio ◽  
Ricardo Samih Georges Abi Rached ◽  
Gibson Luiz Pilatti ◽  
Letícia Helena Theodoro ◽  
Luiz Henrique Carvalho Batista
Keyword(s):  
Root Surface ◽  
Smear Layer ◽  
Treatment Modalities ◽  
Control Group ◽  
Group Iii ◽  
Layer Removal ◽  
Group I ◽  
Control Application ◽  
Root Surfaces ◽  
Gel Ph

The purpose of this study was to compare the removal of root surface smear layer following active application of EDTA gel and EDTA-T (texapon) gel in different concentrations (5%, 10%, 15%, 20% and 24%), using scanning electron microscopy. A total of 220 dentin blocks obtained from the root surfaces of extracted teeth were divided into 3 groups: Group I - (control) application of saline solution (n = 20); Group II - EDTA gel (pH 7.0) was applied in the following concentrations: 5%, 10%, 15%, 20% and 24% (n = 100); Group III - EDTA-T gel (pH 7.0) applied in the same concentrations described above (n = 100). The photomicrographs were evaluated by one calibrated examiner using a smear layer removal index and following statistical analysis (Kruskal-Wallis test). The results demonstrated that the specimens treated with EDTA and EDTA-T gel presented a better smear layer removal than the control group (p < 0.01); no statistically significant differences were observed between the EDTA and EDTA-T groups and between the concentrations tested (Mann-Whitney, p > 0.05). Within the limits of this study, it can be concluded that all treatment modalities effectively removed the smear layer from the root surface. The addition of texapon into the EDTA gel formulation did not increase its effectiveness.

Evaluation and Comparison of Quantity and Pattern of Fluoride release from Orthodontic Adhesives: An in vitro Study

2014 ◽  
Vol 15 (1) ◽  
pp. 99-102 ◽  
Author(s):  
Devatha Ashok Babu ◽  
Sanjay Krishna Sriram ◽  
Ravindra Reddy Regalla ◽  
Chandulal Jadav ◽  
Roopa Rani S Sriram
Keyword(s):  
Orthodontic Treatment ◽  
Control Group ◽  
Base Line ◽  
Fluoride Release ◽  
Group Iii ◽  
Orthodontic Adhesives ◽  
Group I ◽  
Group Ii ◽  
Topical Fluoride

ABSTRACT Background Orthodontic treatment has gained popularity since beginning of era of dentistry. Now a day, everyone is conscious about their appearance, smile and function. During orthodontic treatment use of brackets and adhesives are common. The bonding of brackets will cause demineralization which requires the fluoridation. So the study has been undertaken to analyze the pattern of fluoride release by commercially available adhesive bonding material for the prevention of demineralization. Aim To evaluate and compare the clinical significance of quantity and pattern of fluoride release from three commercially available adhesives. Objectives To assess the pattern of fluoride release and quantity, to reduce the decalcification of enamel around orthodontic brackets and bands during treatment and to prevent further use of topical fluoride both office and self-use agents for prevention of demineralization/for remineralization. Materials and methods The comparison of quantity and pattern of fluoride release study involved commercially available bonding adhesives. They are: Group I—resin reinforced glass Ionomer light cure material (OrthoLC), Group II—fluoride releasing composite resin material (Excel) and Group III— conventional composite (Relay-a-bond) evaluated on 78 freshly extracted premolar teeth divided into three groups consisting 26 specimens in each group. The prepared specimens were stored in artificial saliva at 37°C in an incubator for subsequent fluoride analysis using ORION ion selective electrode coupled with ionalyzer 901. Fluoride analysis made at 24 hours intervals for first 3 consecutive days and thereafter at the end of 10th, 17th, 24th and 31st day of bonding. The data obtained were tabulated and interpreted by statistical analysis using ‘t’ test and one-way analysis of variance (ANOVA). Observations and Results The quantity of fluoride release in groups I and II was significant even at the end of 31st day. The one-way AVOVA showed intra and inter group significance in the quantity of fluoride release. But group III with zero fluoride release with significant decalcification on enamel which requires external use of topical fluorides. The pattern of fluoride released was 3.06 ppm for group I and 2.01 ppm for group II and was declined sharply after 24 hours; and continued to decline in subsequent weeks. Mean quantity of fluoride release by group I was 15.08 ppm were as group II was 9.02 ppm over the test period of 31 days. At the end of 31st day the group I bonding adhesive was releasing considerable amount of fluoride compared to group II whereas group III was nil. At all the periods inter and intra group mean values were highly significant. And group III acted as base line or control group as it was non fluoride releasing material. Conclusion Both the fluoride releasing adhesive bond material are useful to reduce the risk of demineralization and further prevent the usage of topical fluoride application and reduce cost and clinical visiting time for both patient and clinician. How to cite this article Regalla RR, Jadav C, Babu DA, Sriram RRS, Sriram SK, Kattimani VS. Evaluation and Comparison of Quantity and Pattern of Fluoride release from Orthodontic Adhesives: An in vitro Study. J Contemp Dent Pract 2014;15(1):99-102.

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