Comparação da resistência ao cisalhamento após colagem com dois cimentos ortodônticos – estudo in vitro

2020 ◽  
Vol 13 (52) ◽  
pp. 96-101
Author(s):  
Kalena de Melo Maranhão Pereira ◽  
Fernanda Neves Borges de Oliveira ◽  
Clayton Pereira Silva de Lima ◽  
Joyce Figueira de Araújo Gatti ◽  
Ana Cássia de Souza Reis
Keyword(s):  
Shear Strength ◽  
Orthodontic Treatment ◽  
Shear Test ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Group I ◽  
Adhesive Remnant Index ◽  
Bovine Enamel ◽  
Ionomer Cement

The objective of this study was to evaluate the shear strength of orthodontic bands cemented with a new Orthobite composite, comparing them to the conventional glass ionomer cement in bovine enamel and to analyze the Adhesive Remnant Index (ARI). The sample consisted of 30 bovine teeth divided into 2 groups: Group I - Orthobite (FGM) and Group II - CIV MERON (VOCO). Prophylaxis has been made with pumice and water followed by cementation according to the manufacturer’s instructions. Afterwards, they were subjected to the shear test at a speed of 0.5 mm/minute speed. Data were submitted to the Student T and Kruskal- -Wallis tests. Significant statistical differences were found between the groups both in the shear strength values (p> 0.05) and in the ARI assessment (p> 0.05). The Orthobite cement proved to be statistically superior to MERON, that is, it presented a better margins seal and a greater resistance to displacement, so this stable union between the tooth and the band is fundamental for the success of the orthodontic treatment.

Antibacterial Activity of Triclosan Incorporated Glass Ionomer Cements – An in vitro Pilot Study

2010 ◽  
Vol 35 (2) ◽  
pp. 157-161 ◽  
Author(s):  
Sajad Sainulabdeen ◽  
Prasanna Neelakantan ◽  
Sindhu Ramesh ◽  
CV Subbarao
Keyword(s):  
Antibacterial Activity ◽  
Pilot Study ◽  
Glass Ionomer Cement ◽  
Diffusion Method ◽  
Control Group ◽  
Glass Ionomer ◽  
Group I ◽  
Significant Difference ◽  
Ionomer Cement

Objectives: The aim of this pilot study was to evaluate the antibacterial activity of glass ionomer cement impregnated with different concentrations (0.5%, 1.25% and 2.5%) of a non releasing bactericide –Triclosan (TC) against two common cariogenic bacteria – Lactobacillus acidophilus and Streptococcus mutans; and to compare Triclosan incorporated GIC with chlorhexidine (CHX) incorporated GIC (2.5%)in terms of antibacterial activity. Methods: Chlorhexidine or Triclosan were added to glass ionomer cement powder to achieve 2.5% CHX – GIC (positive control – Group II), 0.5%, 1.25% and 2.5% TC-GIC (experimental groups III, IV and V respectively) formulations. Restorative glass ionomer cement (Fuji IX GC –Group I) served as negative control. The powder and liquid were mixed and inserted into the wells punched in agar plates (10mm × 4mm). The agar diffusion method was used to determine the antibacterial activity of the cements after 1, 7 and 30 days. Mean values were compared between different study groups using One-way ANOVA and Tukey's HSD procedure at a significance level of 5%. Results: Triclosan incorporated GIC was more effective against L.acidophilus and S.mutans than Chlorhexidine incorporated GIC. Triclosan at a concentration of 2.5% was more effective than at lower concentrations. At all time periods studied, the maximum zone of inhibition against L.acidophilus was produced by Group V. Against S.mutans, on days 1,7 and 30, there was no significant difference between Groups II and IV (p>0.05), while the other groups showed significant differences. Conclusion: The use of triclosan as an antibacterial additive in GIC holds promise and further clinical research is needed in this direction.

scholarly journals Validity of using bovine teeth as a substitute for human counterparts in adhesive tests

2003 ◽  
Vol 9 (1-2) ◽  
pp. 201-207 ◽  
Author(s):  
F. Saleh ◽  
N. Taymour
Keyword(s):  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Group I ◽  
Significant Difference ◽  
Strength Tests ◽  
Bond Strengths ◽  
Bovine Enamel ◽  
Tensile Bond Strengths ◽  
Ionomer Cement

Shear and tensile bond strengths of 40 human and 40 bovine teeth were compared. Teeth were randomly assigned to group I, which received light-cured composite resin, or group II, which received light-cured resin-reinforced glass ionomer cement. The groups were subdivided for shear and tensile bond strength tests, which were conducted on a universal testing machine installed to a computer transducer. Statistical analysis revealed a highly significant difference between shear and tensile bond strengths of human and bovine enamel; however, regression prediction equations support the use of bovine teeth as a reliable substitute to human counterparts in bonding studies of orthodontic adhesion

scholarly journals Shear bond strength of glass-ionomer cements to dentin: Effects of dentin depth and type of material activation

1997 ◽  
Vol 11 (suppl 1) ◽  
Author(s):  
Elda PISANESCHI ◽  
Rubens Corte Real de CARVALHO ◽  
Edmir MATSON
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Glass Ionomer Cement ◽  
In Vitro Tests ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Group Iii ◽  
Group I ◽  
Ionomer Cement

The purpose of this study was to determine, through the shear bond strength of in vitro tests, that the type of glass-ionomer cements (conventional or hybrid) and dentin depth (superficial or deep) are factors that may influence the adhesion of these materials to the dentin structure. Specimens of two conventional glass-ionomer cements (Vidrion R® - SS White and Chelon Fil®- Espe) and a hybrid-glass ionomer cement (Vitremer® - 3M) were separated in groups and prepared for the shear bond strength test. The results submitted to statistical analysis were (all values are in MPa): Group I - Vidrion R - superficial dentin 1.97 (<FONT FACE="Symbol">±</FONT> 0.56); deep dentin 3.15 (<FONT FACE="Symbol">±</FONT> 1.51); Group II - Chelon Fil - superficial dentin 2.43 (<FONT FACE="Symbol">±</FONT> 1.43); deep dentin 3.21 (<FONT FACE="Symbol">±</FONT> 0.89); and Group III - Vitremer - superficial dentin 7.04 (<FONT FACE="Symbol">±</FONT> 2.04); deep dentin 10.30 (<FONT FACE="Symbol">±</FONT> 1.99). There were significant differences between dentin depth and type of materials

scholarly journals Comparison of Film Thickness of Two Commercial Brands of Glass Ionomer Cement and One Dual-cured Composite: An in vitro Study

2017 ◽  
Vol 18 (8) ◽  
pp. 670-674 ◽  
Author(s):  
Naveen Gupta ◽  
Rajat R Khajuria ◽  
Rishav Singh ◽  
Pranamee Barua ◽  
Nausheen Hajira
Keyword(s):  
Bond Strength ◽  
Film Thickness ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Group I ◽  
Luting Cement ◽  
Glass Slab ◽  
Ionomer Cement

ABSTRACT Aim The present study is undertaken to examine the film thickness of three most commonly used luting cements and to determine their usage as a luting agent. Materials and methods This study was carried out strictly according to the guidelines of American Dental Association (ADS) specification no. 8. Two glass slabs of 5 cm in length and 2 cm in width were used. One glass slab was kept over the other glass slab and the space between the two glass slabs was measured using metallurgical microscope at the power of 10×. Two brands of glass ionomer cement (GIC) and one dualcured resin cement were used in this study. The test cement is sandwiched between two glass slabs. A static load of 15 kg was applied using universal testing machine on the glass slabs for 1 hour and the space present between the two glass slabs was measured using metallurgical microscope at the power of 10×. Results Greatest film thickness was found in group III (Paracore) followed by group II (micron) and lowest in group I (GC luting and lining cement). All the tested samples can be used for luting purposes. Conclusion Greatest film thickness was observed in Paracore followed by micron and lowest in GC luting and lining cement. This suggests that the 25 to 27°C is ideal for mixing of the cement when used for luting consistency. The cement with film thickness more than 30 µm should never be used for luting purposes. Clinical significance The dentist should choose the luting cement with utmost care noting the film thickness and bond strength of the cement. The cement with low exothermic heat production and good bond strength should be encouraged. How to cite this article Khajuria RR, Singh R, Barua P, Hajira N, Gupta N, Thakkar RR. Comparison of Film Thickness of Two Commercial Brands of Glass Ionomer Cement and One Dualcured Composite: An in vitro Study. J Contemp Dent Pract 2017;18(8):670-674.

scholarly journals PERBANDINGAN KEBOCORAN MIKRO PADA RESTORASI RESIN KOMPOSIT MIKROFILLER DENGAN RESIN-MODIFIED GLASS IONOMER CEMENT (RMGIC) PADA KAVITAS KLAS V GIGI ANTERIOR

2015 ◽  
Vol 3 (2) ◽  
pp. 83-91
Author(s):  
Thesi Kurnia Ayudia ◽  
Kuswardani Susari Putri ◽  
Ivony Fitria
Keyword(s):  
Composite Resin ◽  
Glass Ionomer Cement ◽  
Base Material ◽  
Glass Ionomer ◽  
Class V ◽  
Anterior Teeth ◽  
Group I ◽  
Resin Modified Glass Ionomer ◽  
Ionomer Cement

Microleakage defined as the clinically undetectable passage of bacteria, fluids, molecules or ions between a cavity wall and the restorative material. Microleakage tends to occur in Class V cavities. It is caused by  marginal adaptation  which is more difficult in class  V cavities. Microfiller composite resin is developed and indicated for areas that not require a large pressure. As the development of dental materials, it has been developed a composite resin base material that is known as resin-modified glass ionomer cement. This material has purposed to reduce the limitation of conventional glass ionomer cement and take the advantage of the composite resin material. The aim of this study was   to evaluate microleakage difference of microfiler composite resin restoration with resin-modified glass ionomer cement restorations in class V anterior teeth cavities.  The methode of this  study used experimental laboratory through in vitro process . Thirty two class V cavities were prepared on labial surfaces of extracted human anterior teeth. Samples were divided into two groups. Group I included sixteen samples that have had   restorated with microfiller composite. Group II included sixteen samples that have had restorated with resin-modified glass ionomer cement. The samples were immersed into aquabides solution for 24 hours. After that, the samples were immersed into 1% methylene blue solution for 24 hours. All samples sectioned longitudinally and analyzed for microleakage as dye penetration using a stereomicroscope. Student t-test were used for statistical analysis. The resulting data showed no significantly difference between two groups. Key Word : Microleakage, microfiller composite resin, resin-modified glass ionomer cement (RMGIC), class V cavities.

scholarly journals In vitro quantitative evaluation of marginal microleakage in class II restorations confected with a glass ionomer cement and two composite resins

2001 ◽  
Vol 15 (4) ◽  
pp. 277-282 ◽  
Author(s):  
Maria Fernanda Borro BIJELLA ◽  
Maria Francisca Thereza Borro BIJELLA ◽  
Salete Moura Bonifácio da SILVA
Keyword(s):  
Glass Ionomer Cement ◽  
Class Ii ◽  
Deionized Water ◽  
Composite Resins ◽  
Glass Ionomer ◽  
Dye Penetration ◽  
Significant Difference ◽  
Distal Direction ◽  
Ionomer Cement

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.

scholarly journals Effects of a glass-ionomer cement on the remineralization of occlusal caries: an in situ study

2006 ◽  
Vol 20 (2) ◽  
pp. 91-96 ◽  
Author(s):  
Mônica Tostes Amaral ◽  
Antônio Carlos Guedes-Pinto ◽  
Orlando Chevitarese
Keyword(s):  
Glass Ionomer Cement ◽  
Knoop Hardness ◽  
Glass Ionomer ◽  
In Situ Study ◽  
Group I ◽  
Oral Environment ◽  
Group Ii ◽  
Pits And Fissures ◽  
Ionomer Cement

This work evaluated the remineralization of demineralized enamel of pits and fissures of human third molars sealed with a glass ionomer cement (Fuji IX, GC Corporation - Japan) or with a Bis-GMA sealant (Delton - Dentsply). Ten volunteers participated in this in situ study that consisted of two thirty-day periods using intra-oral devices, with a week’s interval in between. Four experimental treatment procedures and one control were randomly assigned to the volunteers’ specimens: Group I, no treatment, control; Group II, artificial caries process; Group III, same treatment as Group II, but sealed with Delton (Dentsply); Group IV, same treatment as Group II, but sealed with Fuji IX (GC Corporation - Japan); Group V, same treatment as Group II and no sealing. Groups I and II were not submitted to the oral environment and served as controls. After a period of 30 days in the oral environment, the specimens were removed from the devices, embedded in acrylic resin, ground flat and polished. Then, Knoop hardness tests were performed, with a 25 g static load applied for 15 seconds. The measurements were made from the base of the fissure up to an opening of 600 µm, pre-established between the inclines of the cusps. Three indentations were then made, located at 25, 75, and 125 µm in depth from the outer enamel margin and 100 µm apart from each other (Micromet 2003). The Brieger F and Bonferroni’s tests were applied to the measurements. It was concluded that sealing with the glass ionomer cement Fuji IX was capable of making the enamel of pits and fissures more resistant by increasing the value of Knoop hardness.

Sign in / Sign up

Export Citation Format

Share Document