Avaliação da Resistência de União Entre Resina Composta e Substrato Dentinário Exposto à Quitosana

Em endodontia, indicam-se substâncias quelantes para a remoção da lama dentinária. O objetivo deste estudo foi avaliar, in vitro, por meio do microcisalhamento, a resistência de união da resina composta com superfícies dentinárias tratadas com EDTA (17%) e quitosana (0,2%). De 30 coroas de dentes bovinos foram removidas as paredes palatina, mesial e distal, expondo a superfície dentinária da parede vestibular da câmara coronária, que abrasionada produziu a camada de esfregaço. Após, a superfície foi tratada, estabelecendo-se 3 grupos (n=10): G1 (controle) com aplicação de água destilada (1min); G2 com aplicação de EDTA (3 min.), e lavagem com água destilada (1 min.); e G3 com aplicação de quitosana (3 min.), lavagem com água destilada (1 min.). Na sequência foram aplicados 2 ml de NaOCl (2,5%), 2 ml de água destilada (1 min), armazenando-as em água destilada (37 °C). Retiradas da água destilada (24 h), fixaram –se 3 tubos Tygon (1mmX1mm) na dentina após o condicionamento local com sistema adesivo convencional de 2 passos. Preenchidos com resina composta e após fotoativação, os tubos foram removidos obtendo-se cilindros que foram submetidos ao microcisalhamento em máquina de ensaio universal. Os resultados de resistência de união (MPa) foram submetidos a Análise de Variância e Tukey, com nível de significância 5%. Observou-se que a resistência de união de G2 e G3 foram equivalentes estatisticamente (p>0,05), porém significativamente maiores que em G1 (p<0,05). Conclui-se que quitosana e EDTA promovem resistência de união semelhante nas condições testadas.Palavras-chave: Camada de Esfregaço. Dentina. Endodontia.AbstractIn endodontics, chelating substances are indicated for smear layer removal. This study evaluated, by micro-shear, the bond strength between composite resin and dentin surfaces treated with EDTA (17%) and chitosan (0.2%). The palatal, mesial and distal walls were removed from 30 crowns of bovine teeth, to expose buccal dentin of coronary chamber, whose abrasion produced the smear layer. The surface was treated, considering 3 groups (n = 10): G1 (control) distilled water (1min); G2 EDTA application (3 min), and distilled water (1 min); and G3 chitosan application (3 min.), distilled water (1 min.). All groups received 2 ml of NaOCl (2.5%), 2 ml of distilled water (1 min), and then stored in distilled water (37 °C). After that (24 h), 3 Tygon matrix (1 mmX1 mm) were fixed to the dentin after surface storing them with a two-step adhesive system. Then, the matrixes were filled with composite resin, and once photoactivated, the matrix were removed resulting in cylinders that were submitted to micro-shear bond test in universal test machine. The results (MPa) were submitted to ANOVA and Tukey, with significance level of 5%. It was observed that G2 and G3 bond strength were statistically equivalent (p> 0.05), but significantly higher than G1 (p <0.05). It is concluded that chitosan and EDTA resulted in similar bond strength under the conditions tested.Keywords: Smear Layer. Dentin. Endodontics.

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Influence of different dentin drying methods on adhesive behavior of composite restorations

Journal of Research in Dentistry ◽

10.19177/jrd.v4e3201673-80 ◽

2017 ◽

Vol 4 (3) ◽

pp. 73

Author(s):

Helena Reis De Souza ◽

Stéfanie Thieme Perotto ◽

Maria Carolina Guilherme Erhardt ◽

Fabio Garcia Lima ◽

Ana Maria Spohr ◽

...

Keyword(s):

Bond Strength ◽

Adhesive System ◽

Drying Methods ◽

Distilled Water ◽

Chi Square ◽

Air Drying ◽

Bonding Agents ◽

Significance Level ◽

Composite Resin Restorations

Aim: The aim of this study was to evaluate, in vitro, the influence of four different dentin drying methods (air drying for 10s, absorbent paper, endodontic suction cannula and air drying for 10s with subsequent re-wetting with distilled water), after etching with phosphoric acid gel 37%, on bond strength and microleakage of composite restorations.Material and Methods: Twenty sound bovine incisors were selected and sectioned transversely. The buccal surfaces were frayed until exposure of dentin, etched and washed with distilled water. Each specimen was subjected to one of the four different drying methods. A 3-step total-etch adhesive system (Adper Scotchbond™ Multi-Purpose) was used on 10 teeth and on the other 10, a 2-step total-etch adhesive system (Adper Single BondT™ 2) was used. Composite resin restorations in cylindrical shapes were made and, after thermocycling, the teeth were subjected to the microshear bond strength test. Cervical areas of the teeth were prepared and restored with the same techniques describe above. Cervical restorations were cut and subjected to microleakage analysis in the cervical margin. Data obtained were tabulated and statistically analyzed, using ANOVA, Chi-square and Kruskal-Wallis tests, and the significance level was set at 5%.Results: The results showed no statistically significant differences among the groups tested.Conclusions: It was concluded that all drying methods tested represent feasible alternatives to clinical application for total etch dentin-bonding agents.

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Influence of pH of different adhesive systems on the polymerization of a chemically cured composite resin

Brazilian Dental Journal ◽

10.1590/s0103-64402005000200004 ◽

2005 ◽

Vol 16 (2) ◽

pp. 107-111 ◽

Cited By ~ 9

Author(s):

Eduardo Batista Franco ◽

Lawrence Gonzaga Lopes ◽

Paulo Henrique Perlatti D'Alpino ◽

José Carlos Pereira

Keyword(s):

Bond Strength ◽

Composite Resin ◽

Testing Machine ◽

In Vitro Study ◽

Adhesive Layer ◽

Adhesive System ◽

Steel Matrix ◽

Adhesive Systems ◽

Influence Of Ph

The purpose of this study was to investigate the effect of pH of different adhesive systems on the polymerization of a chemically cured composite resin (Adaptic - AD), by means of tensile bond strength testing. The adhesive systems tested were: ARM, Prime & Bond 2.1 (PB), Scotchbond Multi Purpose (SMP) and Single Bond (SB). Bond strength at the resin/adhesive system/resin interface was assessed. Five groups (n=5) were formed, according to following configuration: G1: AD/ARM/AD; G2: AD/PB/AD; G3: AD/SMP/AD; G4: AD/SB/AD; G5: AD/AD (no adhesive). A two-mold stainless steel matrix with a cone-shaped opening (1-mm-thick; 4 mm in diameter) was used to obtain resin discs. AD resin was inserted into the first mold, left-self curing and an adhesive layer was applied onto resin surface and light-cured. The second mold was assembled over the first and was filled with the resin. After 10 min, this setting was loaded in tension in a universal testing machine running at a crosshead speed of 0.5 mm/min. Data were submitted to one-way ANOVA and Tukey's test (p<0.05). Bond strength means (kgf) were: G1: 15.23 ± 4.1; G2: 0.00 ± 0.0; G3: 16.96 ± 2.4; G4: 10.08 ± 2.7; G5: 15.44 ± 0.9. There were statistically significant differences (p<0.05) between G2-G1; G2-G3; G2-G4; G4-G1; G4-G3. The systems with the lowest pHs (PB and SB) yielded the lowest bond strength. The findings of this in vitro study demostrates that the pH of adhesive systems influences the polymerization and bond strength of chemically cured resin materials. The low pH simplified adhesive systems showed distinct degrees of incompatibility with the chemically cured resin, when compared to the conventional adhesive systems.

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Comparative study of adhesive systems applied to different regions of dental substrate

Revista Odonto Ciência ◽

10.15448/1980-6523.2016.4.22482 ◽

2017 ◽

Vol 31 (4) ◽

pp. 158

Author(s):

Veridiana Camilotti ◽

Virgínia Bosquiroli ◽

Máx Dobrovolski ◽

Mario Alexandre Coelho Sinhoretic ◽

Priscilla Busatoa Do Monte Ribeiro ◽

...

Keyword(s):

Bond Strength ◽

Composite Resin ◽

Resin Composite ◽

Adhesive System ◽

Cervical Region ◽

Test Machine ◽

Adhesive Failure ◽

Adhesive Systems ◽

Type Analysis ◽

Microshear Bond Strength

OBJECTIVE: The aim of this study was to evaluate the bond strength (BS) of different self-etching adhesive systems to bovine dentin.METHODS: For this purpose, 50 teeth were flattened with silicon carbide abrasive papers and randomly divided into 5 groups: SB – Single Bond Plus; Group AEO – Adper Easy One; Group ADH – AdheSE; Group ASE – Adper SE Plus and Group Clear – Clear Fill. After adhesive system application, 5 Tygon cylinders (1.8 mm×2 mm) were placed on the vestibular surface of each tooth, filled with resin composite (Filtek Z350) and light activated. Three composite resin cylinders were fabricated for each bovine crown, one being located in the incisal region, one in the middle third and one in the cervical region, totaling 30 composite resin test specimens (TS) for each group. The TS were submitted to the microshear bond strength test in a Universal Test Machine Kratos), at a cross-head speed of 0.5 mm/min.RESULTS: The BS was calculated and analyzed by ANOVA (one-way) and Tukey’s test (p<0.05). The highest BS values were obtained in Group SB and there were no significant differences between the adhesive systems tested in the middle and cervical thirds. In the fracture type analysis it was found that adhesive failure was dominant for all groups.CONCLUSION: The conventional two-step adhesive system SB presented the highest bond strength mean to bovine dentin for all the regions.

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The difference of tensile bond strength between total and self etch adhesive systems in dentin

Padjadjaran Journal of Dentistry ◽

10.24198/pjd.vol22no1.14065 ◽

2010 ◽

Vol 22 (1) ◽

Author(s):

Selly Yusalina ◽

Moch. Richata Fadil ◽

Milly Armilia

Keyword(s):

Bond Strength ◽

Composite Resin ◽

Adhesive System ◽

Tensile Bond Strength ◽

Single Bond ◽

Conservation Area ◽

Composite Resin Restoration ◽

The Difference ◽

Self Etch

Total etch adhesive system has been widely used in teeth conservation area as an adhesive agent before implicating composite resin restoration agent. The aim of this research is to prove the difference of tensile bond strength between total etch (Single Bond) and self etch adhesive system (Adper prompt L-Pop) on dentin surface in vitro. The extracted and non carries maxillary premolar teeth were used in this research and were divided into 2 groups. The first group comprised 15 specimen teeth etched in phosphoric acid and was applicated with the Single Bond adhesive agent. The second group comprised 15 specimen teeth, applicated with the Adper Prompt-L-Pop. The composite resin (Z 350, 3M) was applied incrementally and each of the layers was rayed for 20 seconds. The specimens were stored in physiologic solution before they were tested. Tensile bond strength was measured by LRX Plus Lloyd Instrument, with 1 N load and 1 mm/minute speed, and the measurement result was in Mpa unit. The result was evaluated statistically by the Student t-test with α = 0.05. Single Bond (the 5th generation) showed a better bond strength compared to the Adper Prompt-L-Pop (the 6th generation).

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Influence of Time on Bond Strength After Bleaching with 35% Hydrogen Peroxide

The Journal of Contemporary Dental Practice ◽

10.5005/jcdp-9-2-81 ◽

2008 ◽

Vol 9 (2) ◽

pp. 81-88 ◽

Cited By ~ 19

Author(s):

Flávia Martão Flório ◽

Cinthia Maria Barbosa ◽

Robson Tetsuo Sasaki ◽

Robera Tarkany Basting

Keyword(s):

Hydrogen Peroxide ◽

Bond Strength ◽

Composite Resin ◽

Artificial Saliva ◽

Testing Machine ◽

Adhesive System ◽

Bleaching Agent ◽

Peroxide Bleaching ◽

Bleaching Treatment

Abstract Aim The aim of this in vitro study was to evaluate the influence of time after treatment with a 35% hydrogen peroxide bleaching agent on the shear bond strength between composite resin and sound enamel and dentin. Methods and Materials Eighty dental slabs - 40 enamel (E) slabs and 40 dentin (D) slabs - were embedded, flatted, and divided into four groups (n=10). In G1 the E and D slabs were kept in artificial saliva for 14 days. For the G2, G3, and G4 groups the E and D slabs were submitted to bleaching treatment with a 35% hydrogen peroxide bleaching agent. At different times after bleaching treatments (G2=immediate; G3=seven days; G4= fourteen days), composite resin cylinders were made using an adhesive system. Tests were performed in a universal testing machine at a speed of 0.5 mm/min to obtain the values in MPa. Results For enamel, the Kruskal-Wallis test and Dunn Method showed G1 differed significantly from G2 (G1=13.40 a; G2=6.64 b; G3=16.76 a; G4=11.64 ab). For dentin, the analysis of variance (ANOVA) and Tukey tests showed that G1 differed significantly from G2 and G3 (G1=12.11 a; G2=4.97 b; G3=8.67 c; G4=11.86 ac). Conclusion It is recommended adhesive restorative procedures in enamel be delayed for seven days postbleaching treatment with 35% hydrogen peroxide, while restorations in dentin should be delayed for 14 days following bleaching treatment. Citation Barbosa CM, Sasaki RT, Flório FM, Basting RT. Influence of Time on Bond Strength After Bleaching with 35% Hydrogen Peroxide. J Contemp Dent Pract 2008 February;(9)2:081-088.

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Bond Strength Analysis of Intracanal Posts used in Anterior Primary Teeth: an in vitro study.

Journal of Clinical Pediatric Dentistry ◽

10.17796/jcpd.31.1.547tqq6574361549 ◽

2007 ◽

Vol 31 (1) ◽

pp. 32-34 ◽

Cited By ~ 2

Author(s):

Sérgio Luiz Pinheiro ◽

Marcelo José Strazzeri Bönecker ◽

Danilo Antonio Duarte ◽

José Carlos Pettorossi Imparato ◽

Margareth Oda

Keyword(s):

Bond Strength ◽

Composite Resin ◽

In Vitro Study ◽

Pediatric Dentistry ◽

Vitro Study ◽

Strength Analysis ◽

Test Machine ◽

Anterior Teeth ◽

Orthodontic Wire

The purpose of this in vitro study is to assess the bond strength of three different posts used to restore primary anterior teeth. These posts were made by composite resin, 0.7mm alpha-shaped orthodontic wire and dentin posts. Thirty roots of extracted primary anterior teeth, with initial physiological resorption, were mounted in a container filled with self cured resin and were endodontically treated. Thirty posts were prepared using three different materials: 10 composite resin posts (Z100), 10 alpha-shaped orthodontic wire and 10 dentin posts. A bulk of composite resin (Z100) was made over the posts using a circular Teflon bisected strip. The specimens were stored in 37°C water solution for 24 hours before tensile bond strength tests in 0,5mm/min speed were performed (Instron model 4442 test machine- Instron Corporation). The results were submitted to the Kruskal-Wallis test and there were no significant statistical differences among the three types of posts assessed (p=0.8666). The dentin posts technique might be considered an alternative for rehabilitation in pediatric dentistry. because of the possibility of natural resorption.

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Effect of an hydrophobic layer on a universal adhesive

RGO - Revista Gaúcha de Odontologia ◽

10.1590/1981-863720180004000073500 ◽

2018 ◽

Vol 66 (4) ◽

pp. 339-344

Author(s):

Mayara Farah Dallin SERAFIM ◽

Adriana Mara Araújo LEAL ◽

José BAUER ◽

Isabella Azevedo GOMES ◽

Karina Gama Kato CARNEIRO

Keyword(s):

Bond Strength ◽

Adhesive Layer ◽

Adhesive System ◽

Control Group ◽

Test Machine ◽

Distilled Water ◽

Universal Adhesive ◽

Significant Difference ◽

Ethical Approval ◽

Hydrophobic Layer

ABSTRACT Objective: evaluate bond strength of a universal adhesive, associated to an extra hydrophobic sealing layer, and compare after three and six months immersed in distilled water. Methods: After ethical approval of the CEP / HUUFMA, 12 human third molars (n = 6) were extracted, which were divided into two groups: SB - control group - selfetching; and SBHidrof - selfetching group associated to the hydrophobic layer (Adhesive layer, 3m ESPE). After incremental restoration with composite resin (Opalis, FGM), the teeth were sliced to obtain specimens (1mm2) and then submitted to the universal test machine (INSTRON 1mm / min.), immediate and after three and six months. The data were submitted to normality (Shapiro Wilk), and comparative Analysis of variance (two ways: technique and time) and Tukey (p <0.05). Results Immediate values showed no statistically significant difference (p> 0.05), but after three and six months of immersion of the specimens, in distilled water, bond strength values were maintained in the group that received the hydrophobic layer (p<0.05). Conclusion: It was observed that, by incorporating a hydrophobic layer on a universal adhesive system, it was possible to preserve dentin adhesion.

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Avaliação dos tratamentos de superfície na resistência de união entre dois pinos de fibra de vidro e uma resina composta

Revista da Faculdade de Odontologia de Porto Alegre ◽

10.22456/2177-0018.108848 ◽

2021 ◽

Vol 62 (1) ◽

pp. 44-55

Author(s):

Andreza Barbosa Santos Guimarães ◽

Rana De Brito Granja ◽

Emily Vivianne Freitas da Silva ◽

Roberta Novis ◽

Blanca Liliana Torres Léon

Keyword(s):

Bond Strength ◽

Composite Resin ◽

Testing Machine ◽

Strength Analysis ◽

Chi Square ◽

Significance Level ◽

Fiber Posts ◽

The Matrix ◽

Chi Square Test ◽

Glass Fiber Posts

Introduction: The aim of this study was to evaluate the influence of different surface treatment methods on glass-fiber posts relative to their bond strength with the composite resin and to evaluate the types of failures that occurred. Materials and Methods: Thirty-six posts from WhitepostDC (FG group) and Exacto Conics (AG group) were used, divided into: Control FG-1 and AG-1 groups – application of silane, according to manufacturers’ specifications; FG-2 and AG-2 groups – conditioning with 10% hydrogen peroxide and silanization; FG-3 and AG-3 groups – aluminum oxide blasting for 10 seconds and silaniza-tion. The composite resin was added in 2-mm increments, each increment was photopolymerized for 40 seconds, until the entire length of the matrix was filled. Then, the assembly (fiber post and composite resin) was sectioned into three portions (cervical, middle and apical) (n = 18). Samples were submitted to the bond strength analysis by a push-out test in a Universal Testing Machine and the failure types were evaluated with a 30 × magnification with an optical micro-scope. Data were submitted to the analysis of variance, the Tukey test, and the chi-square test with a 5% significance level. Results: For AG groups, the treatment with silane (23.10 MPa) resulted in statistically greater bond strength than the treatments with peroxide (17.19 MPa) and blasting (16.28 MPa). It was found that the bond strength was statistically higher in the middle third (21.16 MPa) than in the apical third (12.55 MPa) for the peroxide treatment. The mixed-type failure had the highest prevalence (57.01%). Conclusion: Silane treatment showed statistically greater bond strength values, when the Angelus brand was tested.

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Effect of Dentin-cleaning Techniques on the Shear Bond Strength of Self-adhesive Resin Luting Cement to Dentin

Operative Dentistry ◽

10.2341/10-392-l ◽

2011 ◽

Vol 36 (5) ◽

pp. 512-520 ◽

Cited By ~ 29

Author(s):

MJMC Santos ◽

H Bapoo ◽

AS Rizkalla ◽

GC Santos

Keyword(s):

Bond Strength ◽

Aluminum Oxide ◽

Shear Bond Strength ◽

Rank Order ◽

Resin Composite ◽

Test Machine ◽

Distilled Water ◽

Luting Cement ◽

Adhesive Cement

SUMMARY Objective This in vitro study evaluated the influence of different cleansing techniques on the bond strength of self-adhesive cement to dentin. Methods and Materials A total of 33 noncarious human molars were sectioned mesiodistally and embedded in chemically cured resin with the buccal or lingual surfaces facing upward. Superficial dentin was exposed and resin disk provisional restorations were cemented to the dentin surfaces with noneugenol provisional cement and were stored in distilled water at 37°C. After seven days, the provisional restorations were removed and 13 specimens were randomly assigned to each of the five groups (n=13), according to the following cleansing treatments: G1—excavator (control); G2—0.12% chlorhexidine digluconate; G3—40% polyacrylic acid; G4—mixture of flour pumice and water; and G5—sandblasting with 50 μm aluminum oxide particles at a pressure of 87 psi. Resin composite disks (Filtek Supreme Plus, 3M ESPE Dental Products, St Paul, MN, USA) 4.7 (±0.1) mm in diameter and 3.0 (±0.5) mm in height were cemented with self-adhesive cement (RelyX Unicem, 3M ESPE), photocured, and stored in distilled water at 37°C for 24 hours. Shear bond strength testing was conducted using a universal test machine at a crosshead speed of 0.5 mm/min until failure. Results Data were analyzed using analysis of variance (ANOVA) and the Tukey-B rank order test. Sandblasting with aluminum oxide (11.32 ± 1.70 MPa) produced significantly higher shear bond strength values compared with any other treatment groups (p<0.05). No significant differences were found between G1-control (7.74 ± 1.72 MPa), G2-chlorhexidine (6.37 ± 1.47 MPa), and G4-pumice (7.33 ± 2.85 MPa) (p<0.05).

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