Bonding dental amalgam to a light-curing glass-ionomer liner/base

BDJ ◽  
1991 ◽  
Vol 170 (6) ◽  
pp. 219-222 ◽  
Author(s):  
Y E Aboush ◽  
R J Elderton
Keyword(s):  
Dental Amalgam ◽  
Glass Ionomer ◽  
Light Curing

scholarly journals Temperature changes in the pulp chamber induced by polymerization of resin-based dental restoratives following simulated direct pulp capping

2019 ◽  
Vol 73 (4) ◽  
pp. 239-248
Author(s):  
Violeta Petrovic ◽  
Jovana Stasic ◽  
Vojislav Komlenic ◽  
Tatjana Savic-Stankovic ◽  
Marina Latkovic ◽  
...  
Keyword(s):  
Calcium Hydroxide ◽  
Mineral Trioxide Aggregate ◽  
Glass Ionomer ◽  
Direct Pulp Capping ◽  
Pulp Chamber ◽  
Temperature Changes ◽  
Pulp Capping ◽  
Dental Restoratives ◽  
Resin Modified Glass Ionomer ◽  
Light Curing

The objective of this study was to measure temperature changes in the pulp chamber induced by polymerization of resin-based dental restoratives following a simulated procedure of direct pulp capping. Class I cavities with a microperforation at the pulp horn were prepared in extracted human molar teeth. The complete procedure of direct pulp capping and cavity restoration was performed with the root part of extracted teeth fixed in a water bath at 37 ?C. Mineral trioxide aggregate, bioactive dentin substitute or calcium-hydroxide paste were used as pulp capping materials. Cavities were restored with a light-cured or chemically-cured resin-modified glass ionomer, universal adhesive and a bulk-fill composite, cured with a high-intensity LED unit. Pulp capping materials caused a slight temperature decrease. Lower temperature increase was recorded during light-curing of the glass ionomer liner after direct capping with mineral trioxide aggregate and calcium-hydroxide than that recorded for the bioactive dentin substitute. Adhesive light-curing increased temperature in all groups with higher mean temperatures in groups with chemically-cured as compared to those for the light-cured glass ionomer liner. Direct pulp capping with mineral trioxide aggregate or calcium-hydroxide followed by the light-cured resin-modified glass ionomer liner and a bonded bulk-fill composite restoration induced temperature changes below the potentially adverse threshold of 42.5?C.

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

2006 ◽  
pp. 881-884
Author(s):  
M.H. Chae ◽  
Yong Keun Lee ◽  
Kyoung Nam Kim ◽  
Jae Hoon Lee ◽  
B.J. Choi ◽  
...  
Keyword(s):  
Bonding Strength ◽  
Glass Ionomer ◽  
Dental Cement ◽  
Light Curing

scholarly journals Water sorption of resin-modified glass-ionomer cements photoactivated with LED

2006 ◽  
Vol 20 (4) ◽  
pp. 342-346 ◽  
Author(s):  
Daniela Francisca Gigo Cefaly ◽  
Linda Wang ◽  
Liliam Lucia Carrara Paes de Mello ◽  
Janaína Lima dos Santos ◽  
Jean Rodrigo dos Santos ◽  
...  
Keyword(s):  
Water Sorption ◽  
Resin Composite ◽  
Composite Resins ◽  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Constant Mass ◽  
Light Emitting ◽  
Halogen Light ◽  
Resin Modified Glass Ionomer ◽  
Light Curing

The Light Emitting Diodes (LED) technology has been used to photoactivate composite resins and there is a great number of published studies in this area. However, there are no studies regarding resin-modified glass-ionomer cements (RMGIC), which also need photoactivation. Therefore, the aim of this study was to evaluate water sorption of two RMGIC photoactivated with LED and to compare this property to that obtained with a halogen light curing unit. A resin composite was used as control. Five specimens of 15.0 mm in diameter x 1.0 mm in height were prepared for each combination of material (Fuji II LC Improved, Vitremer, and Filtek Z250) and curing unit (Radii and Optilight Plus) and transferred to desiccators until a constant mass was obtained. Then the specimens were immersed into deionized water for 7 days, weighed and reconditioned to a constant mass in desiccators. Water sorption was calculated based on weight and volume of specimens. The data were analyzed by two-way ANOVA and Tukey test (p < 0.05). Specimens photocured with LED presented significantly more water sorption than those photocured with halogen light. The RMGIC absorbed statistically significant more water than the resin composite. The type of light curing unit affected water sorption characteristics of the RMGIC.

Biocompatibility of various light-curing and one conventional glass-ionomer cement

Biomaterials ◽  
1998 ◽  
Vol 19 (6) ◽  
pp. 559-564 ◽  
Author(s):  
G. Leyhausen ◽  
M. Abtahi ◽  
M. Karbakhsch ◽  
A. Sapotnick ◽  
W. Geurtsen
Keyword(s):  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Light Curing ◽  
Ionomer Cement

scholarly journals Dentists' perspective on preference for direct restorative materials for different tooth cavities: A study from two colleges in Kathmandu, Nepal

2014 ◽  
Vol 3 (2) ◽  
pp. 72-77
Author(s):  
Keshav Raj Poudel ◽  
Suman Gautam ◽  
Prenit Pokhrel ◽  
Bijendra Raj Raghubanshi ◽  
Amshuman Shrestha ◽  
...  
Keyword(s):  
Glass Ionomer Cement ◽  
Dental Amalgam ◽  
Filling Material ◽  
Restorative Material ◽  
Glass Ionomer ◽  
Posterior Tooth ◽  
Filling Materials ◽  
Carious Teeth ◽  
Ionomer Cement ◽  
Selection Of

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

scholarly journals Effect of light curing unit on resin-modified glass-ionomer cements: a microhardness assessment

2009 ◽  
Vol 17 (3) ◽  
pp. 150-154 ◽  
Author(s):  
Daniela Francisca Gigo Cefaly ◽  
Liliam Lucia Carrara Paes de Mello ◽  
Linda Wang ◽  
José Roberto Pereira Lauris ◽  
Paulo Henrique Perlatti D'Alpino
Keyword(s):  
Glass Ionomer Cements ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Light Curing ◽  
Effect Of Light

Minimizing Dentinal Fluid Flow Associated with Gap Formation

2006 ◽  
Vol 85 (11) ◽  
pp. 1027-1031 ◽  
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.

scholarly journals Resin-modified Glass-ionomer Setting Reaction Competition

2009 ◽  
Vol 89 (1) ◽  
pp. 82-86 ◽  
Author(s):  
D.W. Berzins ◽  
S. Abey ◽  
M.C. Costache ◽  
C.A. Wilkie ◽  
H.W. Roberts
Keyword(s):  
Differential Scanning Calorimetry ◽  
The Other ◽  
Glass Ionomer ◽  
Light Activation ◽  
Acid Base ◽  
Scanning Calorimetry ◽  
Setting Reaction ◽  
Resin Modified Glass Ionomer ◽  
Light Curing ◽  
Setting Mechanism

Resin-modified glass ionomers (RMGI) set by at least 2 mechanisms dependent upon reactant diffusion prior to gelation. Each reaction’s kinetics and setting mechanism may rely on and/or compete with the other. In this study, we investigated RMGI setting reaction interactions using differential scanning calorimetry (DSC) by varying light-cure initiation times. A RMGI was analyzed with isothermal and dynamic temperature scan DSC with light-curing occurring immediately, or at 5 or 10 minutes after mixing as well as without light-activation. Results show that as time allowed for the acid-base reaction increased, the light-activation polymerization exotherm decreased. Conversely, analysis of DSC data suggests that earlier light-activation may limit the acid-base reaction and result in a different structured material. During early RMGI development, acid-base and light-polymerization reactions compete with and inhibit one another.

Effect of Light Activation on Resin-modified Glass Ionomer Shear Bond Strength

2012 ◽  
Vol 37 (4) ◽  
pp. 380-385 ◽  
Author(s):  
NC Lawson ◽  
D Cakir ◽  
P Beck ◽  
L Ramp ◽  
JO Burgess
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Glass Ionomer ◽  
Light Activation ◽  
Plastic Tube ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer ◽  
Light Curing ◽  
Setting Mechanism ◽  
Effect Of Light

SUMMARY Objective Recent studies confirmed that resin-modified glass ionomers (RMGIs) set on the basis of two competing mechanisms, an acid-base reaction and a light-activated resin polymerization. This study evaluated the effect of the setting mechanism on bond strength by measuring the shear bond strength of three RMGIs to dentin with and without light activation. Methods Sixty human molars were ground to midcoronal dentin and randomly divided into six even groups: 1) Ketac Nano (KN), 2) KN without light cure (woLC), 3) Fuji Filling LC (FF), 4) FF woLC, 5) Fuji II LC (FII), and 6) FII woLC. The dentin surfaces of the specimens were conditioned/primed according to the manufacturers' instructions. A 1.54-mm diameter plastic tube was filled with RMGI material and affixed to the dentin surface. Groups 1, 3, and 5 were light cured for 20 seconds, and groups 2, 4, and 6 were immediately placed in a damp dark box with no light curing at 37°C for 24 hours. Shear bond strength testing was performed in an Instron device at 1 mm/min. Data were analyzed with a one-way analysis of variance (ANOVA) and Tukey/Kramer test (α=0.05). Results Mean ± standard deviation shear bond strength values (MPa) are: 7.1 ± 4.2 (KN), 11.7 ± 3.9 (FF), 10.2 ± 3.2 (FF woLC), 12.5 ± 5.1 (FII), and 0.3 ± 0.4 (FII woLC). Two KN, all KN woLC, and seven FII woLC specimens debonded before testing. Tukey/Kramer analysis revealed no significant differences in bond strength between the three light-cured RMGIs. KN and FII showed significantly lower bond strength without light cure, but no significant difference was observed between FF and FF woLC. Conclusions The results of this study strongly suggest that light activation is necessary to obtain optimal bond strength between RMGI and dentin. FF may contain components that chemically activate resin polymerization. Clinically, KN and FII need to be light cured after placement of these RMGIs.

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