scholarly journals The Influence of Resin Infiltration Pretreatment on Orthodontic Bonding to Demineralized Human Enamel

2020 ◽  
Vol 10 (10) ◽  
pp. 3619
Author(s):  
Marina Simunovic Anicic ◽  
Cecilia Goracci ◽  
Jelena Juloski ◽  
Ivana Miletic ◽  
Senka Mestrovic
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Present Report ◽  
Group Iv ◽  
Group Iii ◽  
Low Viscosity ◽  
Initial Caries ◽  
Group I ◽  
Demineralized Enamel ◽  
The Difference

Prior research reveal that low-viscosity resin is able to significantly penetrate initial caries lesions, which leads to their stabilization. The objective of the present report is to assess the shear bond strength (SBS) of orthodontic brackets bonded with different adhesives to demineralized enamel treated with a low-viscosity resin infiltrant. It also aims to compare the achieved bond strengths to those achieved in relation to sound enamel (SE). A total of 48 newly extracted third molars were collected, distributed in four groups (n=12), covered with a nail varnish, with 4 x 4 mm of uncoated area, immersed in Buskes demineralizing solution (14 days, 37 °C) or remained untreated. Group I: SE + Transbond XT; Group II: demineralized enamel (DE) + ICON + Transbond XT; Group III: DE + ICON + Scotchbond Universal; Group IV: DE + ICON + Assure PLUS. SBS was quantified in megapascals (MPa) and statistically analyzed (ANOVA, p ≤ 0.05). The mode of failure was assessed microscopically (10 x magnification). The highest SBS detected was in Group IV, and the difference was statistically significant (F = 14.37; p = 0.000). Treatment with a resin infiltrant on DE does not impair the shear bond strength when compared to SE, although it does produce a significantly higher strength when combined with Assure PLUS.

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 Shear bond strength of bulk-fill and nano-restorative materials to dentin

2016 ◽  
Vol 10 (01) ◽  
pp. 040-045 ◽  
Author(s):  
Hakan Colak ◽  
Ertugrul Ercan ◽  
Mehmet Mustafa Hamidi
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Clinical Success ◽  
Testing Machine ◽  
Group Iv ◽  
Composite Resins ◽  
Group Iii ◽  
Bonding System ◽  
Group I ◽  
Significant Difference

ABSTRACT Objectives: Bulk-fill composite materials are being developed for preparation depths of up to 4 mm in an effort to simplify and improve the placement of direct composite posterior restorations. The aim of our study was to compare shear-bond strength of bulk-fill and conventional posterior composite resins. Materials and Methods: In this study, 60 caries free extracted human molars were used and sectioned parallel to occlusal surface to expose midcoronal dentin. The specimens were randomly divided into four groups. Total-etch dentine bonding system (Adper Scotchbond 1XT, 3M ESPE) was applied to dentin surface in all the groups to reduce variability in results. Then, dentine surfaces covered by following materials. Group I: SonicFill Bulk-Fill, Group II: Tetric EvoCeram (TBF), Group III: Herculite XRV Ultra, and Group IV: TBF Bulk-Fill, 2 mm × 3 mm cylindrical restorations were prepared by using application apparatus. Shear bond testing was measured by using a universal testing machine. Kruskal–Wallis and Mann–Whitney U-tests were performed to evaluate the data. Results: The highest value was observed in Group III (14.42 ± 4.34) and the lowest value was observed in Group IV (11.16 ± 2.76) and there is a statistically significant difference between these groups (P = 0.046). However, there is no statistically significant difference between the values of other groups. In this study, Group III was showed higher strength values. Conclusion: There is a need for future studies about long-term bond strength and clinical success of these adhesive and bulk-fill systems.

scholarly journals Impact of Various Cross Linking Agents on Dentin Adhesive Systems - an In-vitro Study

2021 ◽  
pp. 86-92
Author(s):  
Ganapathi Vasavi Prasanna ◽  
Vemareddy Rajasekhar ◽  
Someshwar Battu ◽  
Korrai Balaraju ◽  
Seera Sudhakar Naidu ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Composite Resin ◽  
Group Iv ◽  
Bonding Agent ◽  
Sodium Ascorbate ◽  
Cross Linking ◽  
Group Iii ◽  
Group I ◽  
Self Etch

Aims and Objectives: The main aim of this study is to compare and evaluate the shear bond strength of composite resin using a total etch adhesive and self-etch adhesive after treatment with different collagen cross-linking agents. Materials and Methods: Forty freshly extracted human maxillary central incisors were taken. The proximal dentin was exposed, cavities were prepared on mesial and distal of each tooth. The specimens were randomly divided into two groups based on bonding agent applied-Group A and Group B i.e universal bonding agent and all in one bonding agent respectively and are subdivided into four groups based on the surface treatment of dentin. Group I A (n=10) Control-total etch(CTE); Group II A (n=10) Sodium Ascorbate-total etch (STE); Group III A (n=10)- Proanthocyanidin total etch(PTE); Group IV A (n=10)- Chitosan total etch (CHTE); Group I B (n=10) Control-self etch (CSE); Group II B (n=10) Sodium Ascorbate-self etch(SSE); Group III B (n=10)- Proanthocyanidin self-etch (PSE); and Group IV B (n=10) - Chitosan self-etch (CHSE). Shear bond strength of the specimens are tested with universal testing machine, and the data was statistically analysed with one way ANOVA. Results: Significantly higher shear bond strength to dentin was observed in teeth treated with 6.5% Proanthocyanidin Total etch, 10% Sodium Ascorbate Total etch and 1% Chitosan acetate compared to the control group. No significant difference was seen with self-etch treated groups. Conclusion: Dentin surface pretreatment with 6.5% Proanthocyanidin, 10% Sodium Ascorbate and 1% Chitosan acetate results in significant enhancement in bond strength of composite resin to deep dentin.

scholarly journals Effect of Aluminum Chloride Hemostatic Agent on Bonding Strength of RMGIC in Primary Tooth

2021 ◽  
Vol 48 (4) ◽  
pp. 397-404
Author(s):  
Seung-Hee Woo ◽  
Jisun Shin ◽  
Joonhaeng Lee ◽  
Miran Han ◽  
Jong Soo Kim
Keyword(s):  
Bond Strength ◽  
Aluminum Chloride ◽  
Shear Bond Strength ◽  
Primary Teeth ◽  
Group Iv ◽  
Hemostatic Agent ◽  
Dentinal Tubules ◽  
Group Iii ◽  
Group I ◽  
Group Ii

The purpose of this study was to evaluate the effect of a hemostatic agent containing aluminum chloride on the shear bond strength of resin-modified glass ionomer cement (RMGIC) to the dentin of primary teeth. Thirty-six extracted non-carious human primary teeth were collected in this study. Dentin surfaces were cut and polished. The specimens were randomly divided into 4 groups; group I: RMGIC without conditioning; group II: polyacrylic acid (PAA), RMGIC; group III: aluminum chloride, RMGIC; group IV: aluminum chloride, PAA, RMGIC. All teeth were thermocycled between 5.0℃ and 55.0℃ for 5000 cycles. Fifteen specimens from each group were subjected to shear bond strength test and 3 specimens from each group were inspected using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy. The mean shear bond strength of each group was as follows: 4.04 ± 0.88 MPa in group I, 8.29 ± 1.40 MPa in group II, 1.39 ± 0.47 MPa in group III, 6.24 ± 2.76 MPa in group IV. There were significant differences among all groups (p < 0.001). SEM image of the dentinal tubules were partially exposed in group III and group IV. Fully exposed dentinal tubules were found in group II. In conclusion, aluminum chloride decreased the shear bond strength of RMGIC to dentin, regardless of PAA conditioning.

scholarly journals Shear Bond Strength of Orthodontic Brackets Cured with Different Light Sources under Thermocycling

2010 ◽  
Vol 04 (03) ◽  
pp. 257-262 ◽  
Author(s):  
Oral Sokucu ◽  
Seyda Herguner Siso ◽  
Firat Ozturk ◽  
Ruhi Nalcaci
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Group Iv ◽  
Light Sources ◽  
Group Vi ◽  
Group V ◽  
Group Iii ◽  
Group I ◽  
Significant Difference ◽  
Light Curing

Objectives: The aim of this study was to compare the shear bond strength (SBS) of two different light sources under different thermal cycle frequencies.Methods: Ninety human premolar teeth were divided into six groups, in which three groups consisted of halogen groups – Group I was cured with halogen without thermocycle, Group II cured with halogen with 500 thermocycles, and Group III cured with halogen with 10,000 thermocycles. The other three groups consisted of Plasma arc (PAC) group – Group IV was cured with PAC without thermocycle, Group V cured with PAC thermocycled 500 cycles, and Group VI cured with PAC thermocycled 10,000 cycles. Two way ANOVA was used to compare the SBS between the groups, and chi squaretest was used to compare the bond failure of ARI scores among the groups.Results: A significant difference was found for curing lights (P<.001) and thermocycling (P<.01). However, there was no interaction between light curing and thermocycling (P=.177). The halogen groups demonstrated higher mean SBS than the PAC groups. Both groups showed a significant reduction between no cycles and 10,000 cycles (P<.05).Conclusions: Both light sources showed favorable SBS performance without the thermocycle procedure. Thermocycling significantly decreased the SBS values of both groups. (Eur J Dent 2010;4:257- 262)

scholarly journals A comparative study on effect of different methods of recycling orthodontic brackets on shear bond strength

2020 ◽  
Author(s):  
Purna Prasad Khanal ◽  
Basanta Kumar Shrestha ◽  
Rajiv Yadav ◽  
Sanjay Prasad Gupta
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Group Iv ◽  
Orthodontic Brackets ◽  
Ultrasonic Cleaning ◽  
Group Iii ◽  
Group I ◽  
Adhesive Remnant Index ◽  
Group Ii

Abstract Background: Recycling the old or debonded bracket is one possible alternative to the replacement with new bracket. The aim of this study was to evaluate and compare the effect of different methods of recycling stainless steel orthodontic brackets on shear bond strength.Methods: One hundred twenty human premolars extracted for orthodontic purpose were randomly divided into four groups. Standard MBT (0.022”) brackets, (Leone co., Sesto, Florentine, Florence, Italy) were bonded on buccal surface of all samples with light cured adhesive primer Orthosol (Enlight, Ormco corp., USA) using LED curing unit for 10 seconds. Group I was assigned as control and the brackets of Group II, Group III and Group IV were subjected to recycling by flaming (Gas microtorch: RS Pro, Nozzle, MT 790) ,flaming with sandblasting (Bio-Art sandblaster; Rua Teotônio Vilela, Brazil) and flaming with ultrasonic cleaning (Ultrasonic cleaning unit ,Confident dental equipments Ltd, India) respectively. The recycled brackets were rebonded and final debonding of all brackets was done with universal testing machine (AG-IC/100 KN, Shimadzu, Japan) at a crosshead speed of 0.5mm/min and shear bond strength (MPa) was determined. The adhesive remnant index was evaluated by stereomicroscope at 10X magnification (Olympus corp., Japan). Results: The highest shear bond strength was obtained with Group I (10.35 ± 0.46 MPa), followed by Group III (9.36 ± 0.55 MPa), Group IV (5.97 ± 0.66 MPa) and the least value was obtained with Group II (4.30 ± 0.55 Mpa). Significant differences among the groups were detected by analysis of variance. Tukey post hoc multiple comparison test showed that the shear bond strength of each group was significantly different from one another (p < 0.001). The Chi-square showed statistically significant differences in the adhesive remnant index of the 4 groups (p < 0.001). Conclusions: Shear bond strength of new brackets was significantly higher than that of the recycled brackets. Among recycled brackets, flaming with sandblasting provided adequate shear bond strength, flaming with ultrasonic cleaning provided borderline value for clinical use while flaming alone led to significantly lower value.

scholarly journals A Comparative Study on the Effect of Different Methods of Recycling Orthodontic Brackets on Shear Bond Strength

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Purna Prasad Khanal ◽  
Basanta Kumar Shrestha ◽  
Rajiv Yadav ◽  
Dr. Sanjay Prasad Gupta
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Group Iv ◽  
Orthodontic Brackets ◽  
Ultrasonic Cleaning ◽  
Group Iii ◽  
Group I ◽  
Group Ii ◽  
Post Hoc

Aim. The aim of this study was to evaluate and compare the effect of different methods of recycling stainless steel orthodontic brackets on shear bond strength. Methods. One hundred twenty human premolars extracted for orthodontic purpose were randomly divided into four groups. Standard MBT (0.022″) brackets were bonded on the buccal surface of all samples with light cured adhesive primers using an LED curing unit for 10 seconds. Group I was assigned as control, and the brackets of Group II, Group III, and Group IV were subjected to recycling by flaming, flaming with sandblasting, and flaming with ultrasonic cleaning, respectively. The recycled brackets were rebonded, and final debonding of all brackets was performed using a universal testing machine at a crosshead speed of 0.5 mm/min and shear bond strength was determined. Data were analyzed with descriptive statistics, ANOVA, and post hoc tests. The adhesive remnant index was evaluated using a stereomicroscope at 10X magnification. Results. The highest shear bond strength was obtained with Group I (10.35 ± 0.46 MPa), followed by Group III (9.36 ± 0.55 MPa) and Group IV (5.97 ± 0.66 MPa), and the least value was obtained with Group II (4.30 ± 0.55 Mpa). Significant differences among the groups were detected by analysis of variance. Tukey’s post hoc multiple comparison test showed that the shear bond strength of each group was significantly different from one another ( p < 0.001 ). Conclusions. Shear bond strength of new brackets was significantly higher than that of the recycled brackets. Among recycled brackets, flaming with sandblasting provided adequate shear bond strength, flaming with ultrasonic cleaning provided a borderline value for clinical use, and flaming alone led to a significantly lower value.

scholarly journals A comparative study on effect of different methods of recycling orthodontic brackets on shear bond strength

2021 ◽  
Author(s):  
Purna Prasad Khanal ◽  
Basanta Kumar Shrestha ◽  
Rajiv Yadav ◽  
Sanjay Prasad Gupta
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Testing Machine ◽  
Group Iv ◽  
Orthodontic Brackets ◽  
Ultrasonic Cleaning ◽  
Group Iii ◽  
Group I ◽  
Group Ii ◽  
Post Hoc

Abstract Aim: The aim of this study was to evaluate and compare the effect of different methods of recycling stainless steel orthodontic brackets on shear bond strength.Methods: One hundred twenty human premolars extracted for orthodontic purpose were randomly divided into four groups. Standard MBT (0.022”) brackets were bonded on buccal surface of all samples with light cured adhesive primer using LED curing unit for 10 seconds. Group-I was assigned as control and the brackets of Group-II, Group-III and Group-IV were subjected to recycling by flaming, flaming with sandblasting and flaming with ultrasonic cleaning respectively. The recycled brackets were rebonded and final debonding of all brackets was done with universal testing machine at a crosshead speed of 0.5mm/min and shear bond strength was determined. Data were analyzed with descriptive statistics, ANOVA and post hoc test. The adhesive remnant index was evaluated by stereomicroscope at 10X magnification.Results: The highest shear bond strength was obtained with Group I (10.35 ± 0.46 MPa), followed by Group III (9.36 ± 0.55 MPa), Group IV (5.97 ± 0.66 MPa) and the least value was obtained with Group II (4.30 ± 0.55 Mpa). Significant differences among the groups were detected by analysis of variance. Tukey post hoc multiple comparison test showed that the shear bond strength of each group was significantly different from one another (p < 0.001). Conclusions: Shear bond strength of new brackets was significantly higher than that of the recycled brackets. Among recycled brackets, flaming with sandblasting provided adequate shear bond strength, flaming with ultrasonic cleaning provided borderline value for clinical use while flaming alone led to significantly lower value.

scholarly journals The effect of cavity disinfectants on the micro-shear bond strength of dentin adhesives

2014 ◽  
Vol 08 (02) ◽  
pp. 184-190 ◽  
Author(s):  
Dina Wafik Elkassas ◽  
Elham Mostafa Fawzi ◽  
Ahmed El Zohairy
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Group Iv ◽  
Single Bond ◽  
Group V ◽  
Group Iii ◽  
Modes Of Failure ◽  
Group I ◽  
Etch And Rinse ◽  
Group Ii

ABSTRACT Objectives: This study was carried out to examine the effect of application of four different disinfecting agents on the micro-shear bond strength (μ-SBS) of an etch-and-rinse and self-etch adhesive systems. Materials and Methods: One hundred flat dentin surfaces of human molars were produced by wet grinding the buccal surfaces. Specimens were randomly assigned to five groups according to the disinfectant used: Group I: Control (no disinfectant); Group II: 5.25% sodium hypochlorite based; Group III: 2% chlorhexidine based (Consepsis), Group IV: 0.1% benzalkoniumchloride based (Tubulicid red) and Group V: 3% doxycycline based (Biopure, MTAD). Specimens were bonded using either Adper Single Bond 2 or Clearfil S3 Bond, which were employed according to the manufacturer's instructions. Resin composite microcylinders were bonded using Tygon® tubes for μ-SBS testing. The modes of failure were noted after visual examination using a binocular stereomicroscope at ×25 magnification. Failures were classified as adhesive, or mixed. μ-SBS results were analyzed using two-way ANOVA followed by Tukey's post-hoc test. Results: Dentin disinfectants tested significantly negated the bonding of Adper Single bond 2 and the groups were ranked; Group I > Group V = Group IV > Group II = Group III, meanwhile they enhanced significantly the μ-SBS values upon using Clearfil S3 Bond and were ranked; Group II > Group III = Group IV = Group V > Group I. Most failures were adhesive with the Adper single bond adhesive system. Mixed modes of failure were evident with Clearfil S3 bond. Conclusions: The disinfectants tested should not be used with Adper Single Bond 2 when applied before the etching step, However they could be used safely prior to bonding with Clearfil S3 Bond.

scholarly journals Reattachment of Fractured Anterior Teeth—Determining Fracture Strength using Different Techniques: An in vitro Study

2012 ◽  
Vol 13 (1) ◽  
pp. 61-65 ◽  
Author(s):  
Ena Mathur ◽  
Srilatha LNU ◽  
Sonal Joshi ◽  
Neha Chhasatia ◽  
PJ Rani
Keyword(s):  
Bond Strength ◽  
Fracture Strength ◽  
Shear Bond Strength ◽  
In Vitro Study ◽  
Group Iv ◽  
Group Iii ◽  
Anterior Teeth ◽  
Strength Recovery ◽  
Group I

ABSTRACT Aim The aim of this in vitro study was to evaluate and compare the shear bond strength of teeth reattached with sixth generation dentin bonding agent: Xeno III and microhybrid resin composite: Esthet-X, using three different techniques: (1) Simple reattachment, (2) overcontour and (3) internal dentinal groove. Methodology A total of 70 human maxillary central incisors were selected and divided into four groups as follows. Group I: Control group comprised of 10 samples. Group II: Simple reattachment, group III: Overcontour and group IV: Internal dentinal groove. Groups II, III and IV comprised of 20 samples each. The teeth in three study groups were sectioned using a diamond disk and the fragment was reattached with Esthet-X and Xeno III using three different techniques. Specimens were stored in tap water for 24 hours and shear bond strength was determined using universal testing machine using a knifeedge chisel (0.5 mm in cross-section) at a crosshead speed of 1 mm/minute. Results The results of this study showed following mean value of fracture strength in Kgf: Group I: Control—27.71; group II: Simple reattachment—9.78; group III: Overcontour—24.41; group IV: Internal dentinal groove—23.83. Conclusion The overcontour technique had the highest strength recovery while the simple reattachment had the lowest. Clinical significance The overcontour technique provided strength recovery almost similar to intact teeth emphasizing that tooth preparation influenced fracture resistance. How to cite this article Srilatha, Joshi S, Chhasatia N, Rani PJ, Mathur E. Reattachment of Fractured Anterior Teeth— Determining Fracture Strength using Different Techniques: An in vitro Study. J Contemp Dent Pract 2012; 13(1):61-65.

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