Reparability of giomer using different mechanical surface treatments

Arami, S; Kimyai, Soodabeh; Oskoee, Parnian Alizadeh; Daneshpooy, Mehdi; Rikhtegaran, Sahand; Bahari, Mahmoud; Kahnamoii, Mehdi Abed

doi:10.4317/jced.53591

Cited by 5 publications

(5 citation statements)

References 25 publications

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“…With the purpose of reducing the increase in size for cavities as a consequence of micro-leakage, the possibility to repair a filling is investigated using giomer materials. To accomplish this, a strong bond between the old and the new material is enforced by removing the surface layers of the old filling [8,26].…”

Section: Discussionmentioning

confidence: 99%

Giomers in dentistry – at the boundary between dental composites and glass-ionomers

Rusnac

Gasparik

Irimie

et al. 2019

Medicine and Pharmacy Reports

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Introduction. From the variety of direct restorative dental materials, composite resins are considered as having the most esthetic and functional properties. The conservative preparation, esthetic results, good mechanical qualities and surface finishing properties of dental composites, combined with the protective properties of fluoride from glass-ionomers, led to a new generation of dental materials: the giomers. Objective. The purpose is to review the available literature about the giomers, regarding the chemical composition, handling properties and esthetics, adhesion and microleakage, fluoride releasing and protection offered, clinical indications. Method. The search was carried out using ScienceDirect and PubMed databases with the following keywords: giomer, esthetic properties giomers and fluoride releasing giomers. A total of 232 articles were initially selected, with the following inclusion criteria: full text articles, written in English, with topics on the properties and the clinical implications of giomers. Papers presented as abstract were not included. In the next step, review articles, duplicates, and articles in other languages were removed; as a result, a total of 44 sources published between 2004 and 2017 were selected. Results. The selected articles referred to the following aspects about the giomers: chemical composition (8 articles), adhesion and microleakage (10 articles), fluoride releasing and pulp protection (15 articles), clinical indications (6 articles), effects of additional treatments and dietary habits (11 articles).

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Section: Discussionmentioning

confidence: 99%

Giomers in dentistry – at the boundary between dental composites and glass-ionomers

Rusnac

Gasparik

Irimie

et al. 2019

Medicine and Pharmacy Reports

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“…In our study, laser irradiation decreased the microtensile bond strength of giomer, and the repair microtensile bond strength in etched group, irrespective of the type of composite, was higher than the bond strength in laser group. No previous study is available on the tensile bond strength of this composite except for a study by Arami et al ( 27 ). They evaluated the effect of different surface treatment methods such as bur preparation, Nd:YAG laser and air abrasion on bond strength of giomer and showed that the bond provided by air abrasion was significantly higher than that of laser and the latter was higher than that of diamond bur preparation.…”

Section: Discussionmentioning

confidence: 99%

Repair bond strength of composite: Effect of surface treatment and type of composite

et al. 2018

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BackgroundBy an increase in use of composite restorations, some defects are also seen in these restorations, which need to be repaired. Since complete replacement of an old restoration may compromise the tooth structure, repair of defect is a more practical approach if there is no caries recurrence. Risk of pulp injury also decreases as such. One major challenge in restoration repair is to obtain a durable bond between the new and old composite. Laser irradiation has been suggested for surface preparation of old composite. This study aimed to assess the effect of composite surface preparation with Er,Cr:YSGG laser on microtensile bond strength to new composite.Material and MethodsA total of 18 blocks were fabricated in three groups of nanohybrid, microhybrid and Beautiful II giomer measuring 4x7x7 mm and subjected to 10,000 thermal cycles between 5-55°C with 30 seconds of dwell time. The samples were randomly assigned to no surface treatment (etching and bonding) or laser plus etching and bonding groups. Composite cylinders measuring 4x7x7 mm were fabricated of Beautiful, nanohybrid and microhybrid composites on old composite surfaces and subjected to 500 thermal cycles for 50 seconds between 5-55°C with 30 seconds of dwell time. Each block was sectioned into 10 samples and they were subjected to microtensile bond strength test. Data were analyzed using ANOVA and Tukey’s test.ResultsIn all composites, the mean bond strength in laser subgroups was higher than that in control subgroups except for giomer, which showed lower bond strength in laser subgroup. The lowest mean bond strength was noted in repair of Z350XT with Z350XT when the surface of old composite was etched (10.92 MPa). The highest mean bond strength was noted in repair of Z250 with giomer when the old composite surface was irradiated with laser (30.55 MPa).ConclusionsEr,Cr:YSGG laser plus etching increased the bond strength in all groups except for giomer group, which showed a reduction in bond strength. Key words:Composite resins, surface treatment, tensile bond strength, laser, er,cr:ysgg, giomer.

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“…Giomers are a new group of composite materials composed of pre-reacted glass-ionomer fillers in a resin matrix; they have some advantages, including the release of fluoride ions and recharging, similar to glass-ionomers, in conjunction with other properties of composite resins, such as optimal esthetics, polishability, and tissue compatibility [ 10 , 11 ]. A study reported that the use of 15% carbamide peroxide increased the surface roughness of giomer, with no change in its color [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Bleaching with 15% Carbamide Peroxide on Flexural Strength of Three Resin-Based Restorative Materials

Kimyai

Lahij

Daneshpooy

et al. 2020

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Objectives: Considering the increasing use of vital bleaching procedures and the increased application of newly introduced resin-based materials for tooth restoration, this study was designed to evaluate the effect of 15% carbamide peroxide gel on the flexural strength of three resin-based restorative materials. Materials and Methods: Three different types of restorative materials namely Beautifil II giomer, Cention N, and Z250 micro-hybrid composite resin were evaluated in this in vitro, experimental study. Twenty-four bar-shaped specimens were prepared from each restorative material, totaling 72 specimens, and were randomly assigned to two subgroups with and without bleaching procedure (n=12). In the bleaching subgroups, 15% carbamide peroxide gel was applied on the specimen surface 8 h a day for 14 days. The flexural strength of the specimens was then measured. Two-way ANOVA was used to compare the flexural strength of the specimens. Results: There was a significant reduction in the flexural strength of materials following exposure to the bleaching agent (P<0.05). The flexural strength was significantly higher in the groups that did not undergo bleaching. However, the mean flexural strength of the restorative materials was not significantly different (P=0.12). Conclusion: The flexural strength of Beautifil II giomer, Cention N, and Z250 micro-hybrid composite resin could be compromised subsequent to bleaching with 15% carbamide peroxide gel. The three resin-based restorative materials exhibited similar flexural strength values irrespective of the use or no use of 15% carbamide peroxide gel.

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Reparability of giomer using different mechanical surface treatments

Cited by 5 publications

References 25 publications

Giomers in dentistry – at the boundary between dental composites and glass-ionomers

Giomers in dentistry – at the boundary between dental composites and glass-ionomers

Repair bond strength of composite: Effect of surface treatment and type of composite

Effect of Bleaching with 15% Carbamide Peroxide on Flexural Strength of Three Resin-Based Restorative Materials

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