Bonding of a light-curing glass-ionomer cement to dental amalgam

Background: Restoration of carious teeth is required to preserve anatomy, function and aesthetics of a tooth. Proper restoration of carious teeth is paramount for the prevention of progression of a dental caries so as to obviate the need for root canal treatment. Location, extent, type, duration and cost play the major roles for the selection of a dental filling material.Objective: This study was set to know the preference of dentists for the selection of filling materials for different tooth cavities.Methods: This was cross-sectional observational study carried out at Kantipur Dental College and KIST Medical College for a period of six months. Pre-structured questionnaires were distributed to the dentists who were in dental practice and collected questionnaires were analyzed for the results. Data were compiled, entered and analyzed using Microsoft Excel 2007 and Epi Info 2000. Yates corrected Chi square test was used wherever applicable and level of significance was set at <0.05.Results: Out of 65 questionnaires distributed to the dental practitioners, 57 (87.7%) questionnaires were returned. Composite was the material of choice as the restorative material for all kinds of tooth cavities except for class V for which glass ionomer cement was the main choice (52.6%). After composite, dental amalgam was second most preferred material for posterior tooth restorations. Order of preference for filling materials for posterior restorations were: composite (52.6%), dental amalgam (47.4%), miracle mix (68.3%; P<0.05) and glass ionomer cement (42.1%). Majority of practitioners (78.9%,P<0.05) opined that strength and durability of restorative material is the main guiding factor for the selection of the filling material for posterior tooth restorations. Additionally, dental amalgam had higher (68%, P< 0.05) patient satisfaction with respect to cost and longevity or durability and was associated with less tiring and time consuming procedure (84%; P<0.05) on dentists’ view.Conclusion: Majority of dentists opined that composite is the more preferred filling material for both anterior and posterior tooth restorations. For posterior tooth cavities (mainly for class I, II and VI) after composite, the order preference for filling materials was amalgam, miracle mix and glass ionomer cement.DOI: http://dx.doi.org/10.3126/jkmc.v3i2.11230Journal of Kathmandu Medical CollegeVol. 3, No. 2, Issue 8, Apr.-Jun., 2014Page: 72-77

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Minimizing Dentinal Fluid Flow Associated with Gap Formation

Journal of Dental Research ◽

10.1177/154405910608501110 ◽

2006 ◽

Vol 85 (11) ◽

pp. 1027-1031 ◽

Cited By ~ 14

Author(s):

D.N. Ratih ◽

J.E.A. Palamara ◽

H.H. Messer

Keyword(s):

Fluid Flow ◽

Resin Composite ◽

Glass Ionomer Cement ◽

Glass Ionomer ◽

Gap Formation ◽

Bonding Agents ◽

Dentinal Fluid Flow ◽

Light Curing ◽

Ionomer Cement

The relationship between gap formation and outward fluid flow and procedures to minimize both phenomena were investigated in extracted human premolars restored in vitro with MOD composite restorations. We hypothesized that either glass-ionomer cement (GIC) liners or low-shrinkage composite could reduce fluid flow related to gap formation. Two groups restored with bonding agents with either high- or low-shrinkage resin composites, and 2 groups restored by either conventional or light-cured GIC liner plus resin composite were compared (8 teeth/group). Fluid flow was measured with an automated apparatus. Baseline fluid flow was low and unchanged after bonding, but increased sharply (though transiently) after teeth were lined with GIC. Outward flow was significantly greater with conventional than with light-cured GIC. Inward fluid flow occurred during light-curing, followed by extensive, prolonged outward flow after curing. Low-shrinkage composite or GIC liners reduced gap formation and limited outward fluid flow. GIC liners promoted outward fluid flow during their setting reactions. Abbreviations: GIC, glass-ionomer cement; CEJ, cemento-enamel junction; MOD, mesio-occluso-distal; SEM, scanning electron microscopy.

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Degree of Conversion and Hardness of Two Different Systems of the VitrebondTM Glass Ionomer Cement Light Cured with Blue LED

The Journal of Contemporary Dental Practice ◽

10.5005/jp-journals-10024-1307 ◽

2013 ◽

Vol 14 (2) ◽

pp. 244-249 ◽

Cited By ~ 1

Author(s):

Mateus Rodrigues Tonetto ◽

Marcelo Ferrarezi de Andrade ◽

Shelon Cristina Souza Pinto ◽

Alvaro Henrique Borges ◽

Matheus Coelho Bandéca ◽

...

Keyword(s):

Glass Ionomer Cement ◽

Hardness Test ◽

Degree Of Conversion ◽

Glass Ionomer Cements ◽

Glass Ionomer ◽

Blue Led ◽

Light Curing ◽

New Formulation ◽

Storage Times ◽

Ionomer Cement

ABSTRACT This study investigated the physicochemical properties of the new formulation of the glass ionomer cements through hardness test and degree of conversion by infrared spectroscopy (FTIR). Forty specimens (n = 40) were made in a metallic mold (4 mm diameter x 2 mm thickness) with two resin-modified glass ionomer cements, VitrebondTM and VitrebondTM Plus (3M/ ESPE). Each specimen was light cured with blue LED with power density of 500 mW/cm2 during 30 s. Immediately after light curing, 24h, 48h and 7 days the hardness and degree of conversion was determined. The Vickers hardness was performed by the MMT-3 microhardness tester using load of 50 gm force for 30 seconds. For degree of conversion, the specimens were pulverized, pressed with KBr and analyzed with FT-IR (Nexus 470). The statistical analysis of the data by ANOVA showed that the VitrebondTM and VitrebondTM Plus were no difference significant between the same storage times (p > 0.05). For degree of conversion, the VitrebondTM and VitrebondTM Plus were statistically different in all storage times after light curing. The VitrebondTM showed higher values than VitrebondTM Plus (p < 0.05). The performance of VitrebondTM had greater results for degree of conversion than VitrebondTM Plus. The correlation between hardness and degree of conversion was no evidence in this study. How to cite this article Calixto LR, Tonetto MR, Pinto SCS, Barros ED, Borges AH, Lima FVP, de Andrade MF, Bandéca MC. Degree of Conversion and Hardness of Two Different Systems of the VitrebondTM Glass Ionomer Cement Light Cured with Blue LED. J Contemp Dent Pract 2013;14(2): 244-249.

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Mechanical resistance of restored teeth with extensive crown damage

Stomatoloski glasnik Srbije ◽

10.2298/sgs0902072s ◽

2009 ◽

Vol 56 (2) ◽

pp. 72-77

Author(s):

Ivan Sarcev ◽

Branislava Petronijevic ◽

Dubravka Markovic ◽

Srecko Selakovic

Keyword(s):

Mechanical Properties ◽

Composite Resin ◽

Glass Ionomer Cement ◽

Dental Amalgam ◽

Control Group ◽

Glass Ionomer ◽

Fracture Force ◽

Significant Difference ◽

Maxillary Premolars ◽

Ionomer Cement

Introduction. Extensively damaged teeth can be restored by different core build-up materials. The aim of this study was to examine the mechanical properties of the restored maxillary premolars with composite resin, dental amalgam and glass ionomer cement (GIC) using compressive strength test. Materials and methods. Forty extracted intact human maxillary premolars were used in this study. Artificial defect in dentin was prepared using diamond bur up to the half of the anatomic crown of the tooth. After core build-up procedure, each tooth specimen was mounted in auto polymerizing acrylic resin blocks 2 mm below cement enamel junction and they were kept in distilled water at 37?C one day before testing. Then, they were placed in specially adapted devices at the angle of 183? to the longitudinal axis and subjected to a controlled load of 1 mm per minute. Results. Results showed that the best mechanical properties had samples restored with resin composite (492.5 N), then with amalgam (341.2 N) and glass ionomer cement (171.8 N). Comparing the fracture force using ANOVA, there was statistic significance between these groups (p<0.01). There were significant differences among control group and restored teeth with composite resin, amalgam and GIC. There was no significant difference in values of fracture forces between groups with composite resin and amalgam. The fracture force corresponding to the teeth restored with the GICs was significantly lower compared to the control group and the group with composite resin and amalgam. Conclusion. Satisfactory mechanical properties of restored premolars were obtained using composite resin and dental amalgam as a core build-up material.

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Effect of etching and light-curing time on the shear bond strength of a resin-modified glass ionomer cement

Brazilian Dental Journal ◽

10.1590/s0103-64402010000600009 ◽

2010 ◽

Vol 21 (6) ◽

pp. 533-537 ◽

Cited By ~ 4

Author(s):

Ivan Toshio Maruo ◽

Juliana Godoy-Bezerra ◽

Armando Yukio Saga ◽

Orlando Motohiro Tanaka ◽

Hiroshi Maruo ◽

...

Keyword(s):

Phosphoric Acid ◽

Bond Strength ◽

Polyacrylic Acid ◽

Shear Bond Strength ◽

Glass Ionomer Cement ◽

Curing Time ◽

Glass Ionomer ◽

Resin Modified Glass Ionomer ◽

Light Curing ◽

Ionomer Cement

The aim of this study was to assess the influence of etching and light-curing time on the shear bond strength (SBS) and adhesive remnant index (ARI) of a resin-modified glass ionomer cement (RMGIC) upon debonding of orthodontic brackets. Sixty-eight bovine permanent incisors were obtained and embedded in acrylic resin. Edgewise metallic brackets were bonded to the teeth with Fuji Ortho LC RMGIC. The specimens were randomly assigned to 4 groups, using the following etching and light-curing times: G1: 10% polyacrylic acid and 40 s (control); G2: 37% phosphoric acid and 40 s; G3: 10% polyacrylic acid and 50 s; and G4: 37% phosphoric acid and 50 s. Shear test was performed at 0.5 mm/min and the ARI was assessed. G2 (3.6 ± 0.98 MPa) presented significantly higher (p<0.05) SBS than G1 (2.76 ± 0.86 MPa) and G4 (2.86 ± 0.68 MPa), and there was no statistically significant difference (p>0.05) between G2 and G3 (2.94 ± 0.67 MPa). ARI presented prevalence of scores 2 and 3 in all groups. RMGIC SBS enhanced with 37% phosphoric acid etching and 40 s light-curing time, but this did not occur when the light-curing time was increased, regardless of the acid used. RMGIC presented prevalence of failures at the adhesive/bracket interface.

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Influence of adhesive systems on the bonding of dental amalgam to glass ionomer cement

Journal of Prosthetic Dentistry ◽

10.1016/s0022-3913(97)70225-7 ◽

1997 ◽

Vol 77 (2) ◽

pp. 127-130 ◽

Cited By ~ 4

Author(s):

Mauro Antonio de Arruda Nobilo ◽

Simonides Consani ◽

Mario Fernando de Goes

Keyword(s):

Glass Ionomer Cement ◽

Dental Amalgam ◽

Glass Ionomer ◽

Adhesive Systems ◽

Ionomer Cement

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Studies on the Adhesion of Glass-ionomer Cements to Dentin

Journal of Dental Research ◽

10.1177/00220345920710111401 ◽

1992 ◽

Vol 71 (11) ◽

pp. 1836-1841 ◽

Cited By ~ 136

Author(s):

A. Lin ◽

N.S. McIntyre ◽

R.D. Davidson

Keyword(s):

Photoelectron Spectroscopy ◽

Secondary Ion Mass Spectrometry ◽

Exchange Process ◽

Glass Ionomer Cement ◽

Glass Ionomer ◽

Ion Exchange Process ◽

Light Curing ◽

Confocal Images ◽

Bond Strengths ◽

Ionomer Cement

This study investigated the bonding mechanisms of glass-ionomer cement to dentin. The approaches included mechanical determination of bond strengths, analysis of surface morphology by means of scanning electron microscopy (SEM) and confocal microscopy, and measurement of chemical changes of fracture bond sites by means of x-ray photoelectron spectroscopy (XPS) and secondary ion mass spectrometry (SIMS). The highest bond strengths were obtained with light-cured glass-ionomer cement. SEM and confocal images showed evidence of mechanical interlocking of cement in dentinal tubules. SIMS depth profiles confirmed the ion-exchange process between the light-cured glass-ionomer cement and the dentin surface. From corresponding XPS results, it was clear that the adhesion characteristics were significantly affected by light-curing and the chemical structure of the polymer.

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The Effect of Hydroxyapatite on Bonding Strength in Light Curing Glass Ionomer Dental Cement

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.309-311.881 ◽

2006 ◽

Vol 309-311 ◽

pp. 881-884 ◽

Cited By ~ 3

Author(s):

M.H. Chae ◽

Yong Keun Lee ◽

Kyoung Nam Kim ◽

Jae Hoon Lee ◽

B.J. Choi ◽

...

Keyword(s):

Flexural Strength ◽

Physical Properties ◽

Bonding Strength ◽

Dental Materials ◽

Glass Ionomer Cement ◽

Ambient Light ◽

Glass Ionomer ◽

Depth Of Cure ◽

Light Curing ◽

Ionomer Cement

The mineral phase of bone and teeth is mainly hydroxyapatite. Currently there are numerous researches being conducted on the effect of the addition of hydroxyapatite to dental materials. Among them, several studied were published stating that the addition of hydroxyapatite to composite resin or glass ionomer cement resulted in an improvement in bonding strength and physical properties Therefore, this study will investigate the effect that the addition of hydroxyapatite to light curing glass ionomer cement has on bonding strength. Two different light curing glass ionomer cement products were selected (FujiⅡLC, GC Cor, Japan and Vitremer™ , 3M/ESPE, USA) and hydroxyapatite was mixed into the light curing glass ionomer cement at various concentrations to create hydroxyapatite-light curing glass ionomer cement mixture. In order to confirm that hydroxyapatite-light curing glass ionomer cement met the basic requirements of dental materials, sensitivity to ambient light, depth of cure, and flexural strength were tested. From the results of the above mentioned tests, the hydroxyapatite-light curing glass ionomer cement with the most superior physical properties for each product (15% HA-Fuji Ⅱ LC, 20% HA-Vitremer™)was bonded to the teeth and then immersed in artificial saliva(36.5°C) for four weeks. Finally the sectioned surface was observed under SEM after measuring the bonding strength. As the hydroxyapatite concentration increased, the depth of cure decreased. However flexural strength increased and there was not much change in the sensitivity to ambient light. Bonding strength, which was the main focus of this study, increased with the addition of hydroxyapatie and scanning electron microscope findings show a more cohesive type of fracture in the material with bone like apatite material formation along the tooth-material interface.

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Рarameters of spontaneous activation of basophils on dental materials with allergic rhinitis patients

Periodontology ◽

10.33925/1683-3759-2020-25-2-148-151 ◽

2020 ◽

Vol 25 (2) ◽

pp. 148-151

Author(s):

V. A. Kozlov ◽

E. A. Satygo ◽

S. G. Shakhaev

Keyword(s):

Allergic Rhinitis ◽

Zirconium Dioxide ◽

Dental Materials ◽

Glass Ionomer Cement ◽

Chromium Alloy ◽

Glass Ionomer ◽

Nasal Breathing ◽

Light Curing ◽

Spontaneous Activation ◽

Ionomer Cement

Relevance. Тhe quality of dental care is greatly influenced by the biocompatibility of the materials used. This problem is particularly acute in patients with a high level of sensitization, such as allergic rhinitis. Currently, the CAST-test is used to diagnose allergies and sensitization of the body. The method has 100% specificity and significantly complements the definition of IgE antibodies.Purpose. To determine the individual tolerance of dental materials in patients with allergic rhinitis.Materials and methods. 47 patients with allergic rhinitis were examined. All patients were sent to determine the test of spontaneous activation of peripheral blood basophils on dental materials: cobalt-chromium alloy; zirconium dioxide; glass ionomer cement; composite material; plastic for the basis of the prosthesis (non-monomer).Results. The Average values of the activation coefficient of blood basophils in patients with nasal breathing disorders were revealed for a kobolto-chrome alloy – 1.29 ± 0.02, for zirconium dioxide – 1.04 ± 0.02, for glass ionomer cement – 1.11 ± 0.04, for composite dental light – curing material – 1.24 ± 0.03, for plastic for prostheses (non-monomer) – 1.19 ± 0.02.Conclusion. The study shows the need for special attention to the planning of dental treatment in patients with nasal breathing difficulties, especially with allergic rhinitis. The frequency of detection of the coefficient of spontaneous activation of basophils test showed a 100% positive result for composite light-curing material and non-motionless plastic, in 91.5% of cases-for a cobolto chrome alloy. 100% negative result for zirconium diaxide and 82.9% of cases for glass ionomer cement.

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