A 3-year clinical evaluation of two composite resins in class-II cavities

This study evaluated, in vitro, marginal microleakage in class II restorations confected with the glass ionomer cement Vitremer and with the composite resins Ariston pHc and P-60. The aims of the study were to assess the effect of thermocycling on those materials and to evaluate two methods utilized in the analysis of dye penetration. Sixty premolars divided in three groups were utilized; the teeth had proximal cavities whose cervical walls were located 1 mm below the cementoenamel junction. Half of the test specimens from each group underwent thermocycling; the other half remained in deionized water, at 37ºC. The specimens were immersed, for 24 hours, in a basic 0.5% fuchsin solution at 37ºC. For the analysis of microleakage, the specimens were sectioned in a mesio-distal direction, and the observation was carried out with the software Imagetools. The results were evaluated through the 2-way ANOVA and through the Tukey’s test. All groups presented marginal microleakage. The smallest values were obtained with Vitremer, followed by those obtained with the composite resins P-60 and Ariston pHc. There was no statistically significant difference caused by thermocycling, and the method of maximum infiltration was the best for detecting the extension of microleakage.

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Clinical Evaluation of Using Three Different Materials in Primary Molar Class II Restorations

Meandros Medical And Dental Journal ◽

10.4274/meandros.galenos.2021.58966 ◽

2021 ◽

Vol 22 (1) ◽

pp. 102-109

Author(s):

Şeyma Erdoğan ◽

Işıl Sönmez

Keyword(s):

Clinical Evaluation ◽

Class Ii ◽

Primary Molar

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Influence of "soft start" polymerization on marginal sealing in resin composite restorations

Stomatoloski glasnik Srbije ◽

10.2298/sgs0302059b ◽

2003 ◽

Vol 50 (2) ◽

pp. 59-64 ◽

Cited By ~ 2

Author(s):

Larisa Blazic ◽

Slavoljub Zivkovic

Keyword(s):

Resin Composite ◽

Nitrate Solution ◽

Silver Nitrate Solution ◽

Class Ii ◽

Composite Resins ◽

Human Teeth ◽

Composite Restorations ◽

Soft Start ◽

Significant Difference ◽

Bonding Systems

The purpose of this study was to evaluate the marginal microleakage in Class II with different materials in resin composite restorations cured by using "soft start" and standard polymerization techniques. Two adhesive Class II cavities were prepared in 50 human teeth with enamel in-between. Samples were divided into 5 groups and filled with composite resins, compatible flow resin composites and bonding systems. The ocluso-mesial restorations were cured with standard curing technique, and the ocluso-distal restorations were cured with "soft start" curing technique. After thermocycling, the teeth were immersed in silver nitrate solution and sectioned for leakage evaluation. The results pointed out, after "soft start" and standard curing techniques, that the best marginal behavior in Class II restorations was obtained with Tetric Ceram / Tetric Flow composite resins, then with Filtek Z 250 / Filtek Flow, followed by Admira Admira Flow and Point / Revolution composite materials. The deepest dye penetration was found in cavities with Diamond Lite / Diamond Link composite restorations. No statistically significant difference was found in the tested composite resin restorations, whether treated with "soft start" polymerization or with standard polymerization technique, in regard to marginal micro leakage.

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Microleakage of "Bulk-Fill" Composite Resin for Class II Restorations Pretreated With CO2 Laser in Deciduous Molars: An In Vitro Study

Journal of lasers in medical sciences ◽

10.15171/jlms.2019.49 ◽

2019 ◽

Vol 10 (4) ◽

pp. 304-309

Author(s):

Larissa Costa Santos ◽

Ravana Angelini Sfalcin ◽

Eugenio José Garcia ◽

Fátima Antônia Aparecida Zanin ◽

Aldo Brugnera Junior ◽

...

Keyword(s):

Phosphoric Acid ◽

Laser Irradiation ◽

Co2 Laser ◽

Class Ii ◽

Composite Resins ◽

Acid Etching ◽

Dentin Hypersensitivity ◽

Significant Difference ◽

Acid Gel

Introduction: Microleakage has been reported to cause dentin hypersensitivity because of the passage of bacteria and their products through the restoration-tooth interface and is one of the main reasons for replacement of restorations. CO2 laser can be used for treatment of dentin hypersensitivity. Thus, this study aimed to evaluate in vitro the microleakage in composite restorations following surface pretreatment with acid etching and CO2 laser. Methods: Twelve human caries-free primary molars were selected. Class II cavities were prepared on occlusal mesial and occlusal distal surfaces. Specimens were randomly divided into four groups (n=6): Group 1 (G1) – 37% phosphoric acid gel etching + Beautiful-Bulk Restorative – Giomer (Shofu Inc); Group 2 (G2) – 37% phosphoric acid gel etching + SDR Bulk-Fill Flow (Dentsply); Group 3 (G3) – CO2 laser irradiation + Beautiful-Bulk Restorative – Giomer (Shofu Inc); Group 4 (G4) – CO2 laser irradiation + SDR Bulk-Fill Flow (Dentsply). Surfaces were restored with bonding agent (Natural Bond DE, DFL). Specimens were cut longitudinally and immersed in 0.5% methylene blue solution for 4 hours. Microleakage scores were assessed under a magnifying glass at x3,5 and qualitatively analyzed by scanning electron microscope (SEM). Data were analyzed using nonparametric Wilcoxon test (P < 0.05). Results: Scores prevailed between 0 and 2, however, no statistically significant difference was found among the groups (P= 0.05). Conclusion: It could be concluded that all composite resins bulk fill did not show significant difference among them regarding microleakage using either CO2 laser or 37% phosphoric acid etching.

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