Streptococcus mutans counts in plaque adjacent to orthodontic brackets bonded with resin-modified glass ionomer cement or resin-based composite

Abstract Patients undergoing radiotherapy treatment present more susceptibility to dental caries and the use of an orthodontic device increases this risk factor due to biofilm accumulation around the brackets. The objective of this study was to evaluate the shear bond strength to irradiated permanent teeth of orthodontic brackets bonded with conventional glass ionomer cement and resin-modified glass ionomer cement due to the fluoride release capacity of these materials. Ninety prepared human premolars were divided into 6 groups (n=15), according to the bonding material and use or not of radiation: CR: Transbond XT composite resin; RMGIC: Fuji Ortho LC conventional glass ionomer cement; GIC: Ketac Cem Easymix resin-modified glass ionomer cement. The groups were irradiated (I) or non-irradiated (NI) prior to bracket bonding. The specimens were subjected to a fractioned radiation dose of 2 Gy over 5 consecutive days for 6 weeks. After the radiotherapy, the brackets were bonded on the specimens with Transbond XT, Fuji Ortho LC and Ketac Cem Easymix. After 24 h, the specimens were subjected to shear bond strength test. The image of enamel surface (classified by Adhesive Remnant Index - ARI) was also evaluated and its frequency was checked among groups/subgroups. The shear bond strength variable was evaluated with ANOVA and Tukey’s post-hoc test. GIC group showed the lowest adhesion values among the groups (p<0.05). There was no statistically significant difference among non-irradiated and irradiated groups (p>0.05). As for the ARI, the CR-I group showed the highest material retention on enamel surface among the irradiated groups. RMGIC group showed the highest values for shear bond strength and presented ARI acceptable for clinical practices.

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Resin-modified glass-ionomer cement can be used to bond orthodontic brackets

Journal of Evidence Based Dental Practice ◽

10.1016/s1532-3382(02)70050-x ◽

2002 ◽

Vol 2 (3) ◽

pp. 209-210

Keyword(s):

Glass Ionomer Cement ◽

Orthodontic Brackets ◽

Glass Ionomer ◽

Resin Modified Glass Ionomer ◽

Ionomer Cement

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The effect of the addition of propolis to resin modified glass ionomer cement bracket adhesive materials on the growth inhibition zone of Streptococcus mutans

F1000Research ◽

10.12688/f1000research.20717.1 ◽

2019 ◽

Vol 8 ◽

pp. 2105

Author(s):

Stefani Kristanti Saputra ◽

Darmawan Sutantyo ◽

Cendrawasih Andusyana Farmasyanti ◽

Ananto Ali Alhasyimi

Keyword(s):

Growth Inhibition ◽

Streptococcus Mutans ◽

Glass Ionomer Cement ◽

Agar Plate ◽

Inhibition Zone ◽

Glass Ionomer ◽

Growth Inhibition Zone ◽

Resin Modified Glass Ionomer ◽

Ionomer Cement ◽

Adhesive Materials

Background: Orthodontic treatments progress alongside the development of adhesive materials. The aim of the present study was to determine the antibacterial properties of propolis, a natural product, in a mixture of resin modified glass ionomer cement by observing the growth inhibition zone of Streptococcus mutans. Methods: This was an in vitro study conducted on 45 samples of adhesive material, which were divided into three groups of propolis concentrations (0%, 15%, and 25%) and duration (0, 15, and 30 days). The antibacterial effect of each sample was evaluated against S. mutans using an agar plate diffusion test. Measurement of the diameter of the growth inhibition zone of S. mutans were carried out. The data obtained were analyzed statistically by Kruskal Wallis test. Results: There was a relationship between concentration and duration of propolis to the growth inhibition zone of S. mutans (p<0.05). The addition of 25% propolis concentration inhibited the growth of S. mutans more than the addition of 15% and 0% propolis concentration. The addition of 0%, 15%, and 25% propolis concentration to resin modified glass ionomer cement for 15 days was more effective in inhibiting the growth of S. mutans. Conclusion: The addition of propolis to adhesive materials provides an inhibitory effect on the growth of S. mutans, which may be effective in the world of preventive dentistry.

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In vitro Evaluation of Topical Fluoride Varnishes Effect on Enamel Demineralization Around Orthodontic Brackets

Revista de Chimie ◽

10.37358/rc.18.11.6673 ◽

2018 ◽

Vol 69 (11) ◽

pp. 3013-3017

Author(s):

Roxana Oancea ◽

Anca Mesaros ◽

Octavia Iulia Balean ◽

Angela Codruta Podariu

Keyword(s):

Resin Composite ◽

Glass Ionomer Cement ◽

Orthodontic Brackets ◽

Fluoride Varnish ◽

Control Group ◽

Glass Ionomer ◽

Mean Values ◽

Resin Modified Glass Ionomer ◽

Ionomer Cement

The aim of this in vitro study was to test the effectiveness of applying the fluoride varnish on bracketed teeth with 2 types of bonding agent. 10 patients aged 12-18 (mean age 13.06 +/- 1.72 years) were scheduled to have the four fist premolar teeth extracted. The teeth were dived in 4 groups: 2 experimental and 2 controls. The teeth were cut in half so 80 surfaces were analyzed. The brackets were collated with Transbond XT and Fuji Ortho Lc. For each of the materials that have been used there was a test and a control group. The tests groups received one single application of Duraphat. The content in fluoride was measured by spectrophotometer. The mean values of fluoride indicated an important increase in the fluoride content after using resin modified glass ionomer cement and fluoride varnish. Statistically significant differences were determined between each of the control and treatment group when both materials have been used, after 10 days and one month application of the varnish. The study pointed out that the fluoride varnish combined with resin modified glass ionomer cement is more efficient than the classical resin composite in preventing demineralization around orthodontic brackets.

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In vivo effect of a resin-modified glass ionomer cement on enamel demineralization around orthodontic brackets

American Journal of Orthodontics and Dentofacial Orthopedics ◽

10.1016/s0889-5406(03)00571-7 ◽

2004 ◽

Vol 125 (1) ◽

pp. 36-41 ◽

Cited By ~ 64

Author(s):

Renata Corrêa Pascotto ◽

Maria Fidela de Lima Navarro ◽

Leopoldino Capelozza Filho ◽

Jaime Aparecido Cury

Keyword(s):

Glass Ionomer Cement ◽

Orthodontic Brackets ◽

Glass Ionomer ◽

Enamel Demineralization ◽

Resin Modified Glass Ionomer ◽

Ionomer Cement

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The evaluation of shear bond strength of resin-modified glass ionomer cement with the addition of 45S5 bioactive glass using two conventional methods.

Journal Of Oral Research ◽

10.17126/joralres.2020.066 ◽

2020 ◽

Vol 9 (4) ◽

pp. 250-258

Author(s):

Maryam Shirazi ◽

◽

Mahsa Sadeghi ◽

Keyword(s):

Bond Strength ◽

Shear Bond Strength ◽

Glass Ionomer Cement ◽

Orthodontic Brackets ◽

Orthodontic Appliances ◽

Glass Ionomer ◽

Significant Difference ◽

Resin Modified Glass Ionomer ◽

Conventional Methods ◽

Ionomer Cement

Introduction: There is a high prevalence of enamel caries around brackets due to the young age of the majority of orthodontic patients, and to the difficulty of plaque removal in presence of orthodontic appliances. Recently, protective agents such as bioactive glasses (BGs) were introduced to enhance remineralization and prevent demineralization of tooth structures. This study aimed to assess the shear bond strength (SBS) of resin-modified glass ionomer cement (RMGIC) with addition of 45S5 BG to enhance its remineralizing potential using two conventional methods. Material and methods: This in-vitro experimental study evaluated three groups (n=20) of orthodontic brackets bonded to enamel using Transbond XT (group 1), light-cure RMGIC (group 2) and RMGIC with BG added (group 3). Samples underwent 7000 thermal cycles and their SBS was measured. The adhesive remnant index (ARI) score was also determined. Quantitative data were analyzed using one-way ANOVA while qualitative data were analyzed using a chi-square test. Discussion: The results showed no significant difference in SBS between study groups, however the ARI scores were significantly different among the groups. The RMGIC group showed the highest ARI while RMGIC doped with BG showed the lowest ARI score. Conclusion: Addition of 30% w/v 45S5 BG to RMGIC does not cause a significant change in SBS of orthodontic brackets bonded to enamel, while resulting in less amount of luting agent remnants on the enamel surface after debonding.

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