scholarly journals Ameloplasty is counterproductive in reducing microleakage around Resin Modified Glass Ionomer and Resin based fissure sealants

2020 ◽  
Vol 36 (3) ◽  
Author(s):  
Tabinda Nawaz Khan ◽  
Farhan Raza Khan ◽  
Syed Yawar Ali Abidi
Keyword(s):  
Glass Ionomer Cement ◽  
Ordinal Scale ◽  
P Value ◽  
Glass Ionomer ◽  
Fissure Sealants ◽  
Human Teeth ◽  
Fissure Sealant ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer

Objective: To compare the microleakage around resin modified glass ionomer cement (RMGIC) based sealants and flowable resin based sealants placed with or without ameloplasty in extracted human teeth. Methods: This in-vitro experimental study was conducted at the Operative Dentistry Department, Dow University of Health Sciences, Karachi, Pakistan from June 2017 to December 2018. Sixty extracted human molars and premolars were assigned to four groups (n=15) each, according to the type of fissure sealant (flowable resin based sealant or resin modified glass ionomer based sealant) used and either placed with or without ameloplasty. Specimens were thermocycled and then immersed in 1% methylene blue for 24 hours. Specimens were then sectioned and examined using stereo-microscope (50X) for microleakage that was scored on an ordinal scale. Mann-Whitney U test and Ordinal regression were applied. Level of significance kept at 0.05. Results: There was a statistically significant difference (p-value <0.001) between the two sealant types for the microleakage scores. Sealants placed with ameloplasty demonstrated significantly higher microleakage values (p-value <0.001). Conclusion: Microleakage was found to be more pronounced in RMGIC based sealants compared to the resin based sealants. Ameloplasty resulted in higher leakage around the sealants irrespective of the chemistry of material. doi: https://doi.org/10.12669/pjms.36.3.1268 How to cite this:Khan TN, Khan FR, Abidi SYA. Ameloplasty is counterproductive in reducing microleakage around Resin Modified Glass Ionomer and Resin based fissure sealants. Pak J Med Sci. 2020;36(3):---------. doi: https://doi.org/10.12669/pjms.36.3.1268 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

scholarly journals Comparative study of resin sealant and resin modified glass ionomer as pit and fissure sealant

2017 ◽  
Vol 10 (1) ◽  
pp. 21
Author(s):  
Shirin Malek ◽  
Mozammal Hossain ◽  
Md. Abdul Gafur ◽  
Md. Shahjalal Rana ◽  
Md. Ali Asgor Moral
Keyword(s):  
Glass Ionomer Cement ◽  
Good Alternative ◽  
Glass Ionomer ◽  
Fissure Sealant ◽  
Treatment Groups ◽  
Organic Debris ◽  
Resin Modified Glass Ionomer ◽  
Group B ◽  
Resin Sealant

<p>The purpose of the present study was to compare the marginal integrity of resin modified glass ionomer cement with that of resin sealant, <em>in vitro</em>. Forty artificial pit and fissure cavities were prepared in occlusal surface of extracted premolar teeth by using ¼ round carbide bur. Cavities were condensed with artificial organic debris followed by cleaning with prophylaxis pumice brush and paste and then separated into two treatment groups. In Group A, 15 fissure cavities were sealed by resin sealant and in Group B, 15 fissure cavities were sealed by resin modified glass ionomer sealant. These specimens were subjected to thermo-cycling followed by dye penetration test. The remaining 5 cavities from each group were analyzed for debris score by the SEM. The results of the microleakage test showed that the efficacy of preventing microleakage of samples sealed by resin modified glass ionomer sealant was higher than the samples sealed by resin sealant. However, no significant differences were found. It can be concluded that use of resin modified glass ionomer sealant is a good alternative for sealing pits and fissures.</p>

scholarly journals Efficiency of Amorphous Calcium Phosphate–Containing Orthodontic Composite and Resin Modified Glass Ionomer on Demineralization Evaluated By a New Laser Fluorescence Device

2009 ◽  
Vol 03 (02) ◽  
pp. 127-134 ◽  
Author(s):  
Tancan Uysal ◽  
Mihri Amasyali ◽  
Alp Erdin Koyuturk ◽  
Deniz Sagdic
Keyword(s):  
Calcium Phosphate ◽  
Amorphous Calcium Phosphate ◽  
Glass Ionomer Cement ◽  
Laser Fluorescence ◽  
Orthodontic Brackets ◽  
Glass Ionomer ◽  
Enamel Demineralization ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer

ABSTRACTObjectives: The aim of this in vitro study was to compare the efficacy of Amorphous Calcium Phosphate (ACP)-containing orthodontic composite and resin-modified glass ionomer cement (RMGIC) on enamel demineralization adjacent to orthodontic brackets evaluated by a new laser fluorescence device.Methods: Sixty extracted maxillary premolars were used in the present study. Twenty orthodontic brackets were bonded with ACP-containing orthodontic adhesive (Aegis-Ortho), 20 were bonded with RMGIC (Fuji Ortho LC) ad20 were bonded with Transbond XT composite as the control. All samples were then cycled for 21 days through a daily procedure of demineralization for 6 hours and remineralization for 17 hours. After this procedure, demineralization evaluations were undertaken by a pen-type laser fluorescence device (DIAGNO-dent Pen). Analysis ofvariance (ANOVA) and Tukey test was used for statistical evaluation, at P<.05 level.Results: According to ANOVA, significant demineralization variations (ΔD) were determined among groups (F=6.650; P<.01). The ACP-containing composite showed the lowest (mean: 8.98±2.38) and the control composite showed the highest (mean:12.15±3.83) ΔD, during 21 days demineralization process (P<.01). Significant difference was also observed between the ΔD scores of the RMGIC (mean: 9.24±2.73) and control (P<.05).No significant differences was found in preventive effects of ACP-containing composite and RMGIC (P<.05) against demineralization.Conclusions: The use of both ACP-containing orthodontic composite and RMGIC should be recommended for any at-risk orthodontic patient to provide preventive actions and potentially remineralize subclinical enamel demineralization. (Eur J Dent 2009;3:127-134)

scholarly journals Time-dependent Variation in Compressive Strengths of Three Posterior Esthetic Restorative Materials: An in vitro Study

2016 ◽  
Vol 6 (3) ◽  
pp. 63-65
Author(s):  
Anjna Sharma ◽  
Pankaj Mishra
Keyword(s):  
Testing Machine ◽  
Glass Ionomer Cement ◽  
In Vitro Study ◽  
Composite Resins ◽  
Time Dependent ◽  
Glass Ionomer ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer ◽  
Restorative Materials

ABSTRACT Aim To compare the compressive strengths of composite resins and resin-modified glass ionomer cements (RMGICs) at different times. Materials and methods A total of 36 samples were prepared, 12 samples of each group, composite resins Filtek Z 250, Filtek Z 350, and resin-modified glass ionomer cement. Compressive strengths of specimens were measured after 1, 24 hours, and 7 days. Test was carried out on a “Universal Testing Machine” with cross-head speed of 5 mm/min. Results There was a significant difference between all the three restorative materials. Analysis of variance showed that mean compressive strengths of Z 250 after 1, 24 hours were higher than Z 350 and RMGIC (p < 0.05). The mean compressive strengths were reduced after 7 days in all the three groups, but after 7 days, the values of Z 250 when compared with the Z 350 and RMGIC were higher. Conclusion The study demonstrated that compressive strengths of hybrid composite resins (Z 250) were significantly higher than that of nanocomposites (Z 350) and RMGIC. How to cite this article Sharma A, Mishra P, Mishra SK. Time-dependent Variation in Compressive Strengths of Three Posterior Esthetic Restorative Materials: An in vitro Study. Int J Prosthodont Restor Dent 2016;6(3):63-65.

scholarly journals The Effect of Three Dentinal Sealers on Retention of Crowns cemented with Resin-modified Glass Ionomer Cement: An in vitro Study

2015 ◽  
Vol 6 (1) ◽  
pp. 10-15
Author(s):  
Ashish R Jain ◽  
R Pradeep ◽  
Sashi Deepth Reddy Janapala ◽  
P Sesha Reddy
Keyword(s):  
Bond Strength ◽  
Glass Ionomer Cement ◽  
T Test ◽  
Control Group ◽  
P Value ◽  
Glass Ionomer ◽  
Resin Modified Glass Ionomer ◽  
Desensitizing Agents ◽  
Ionomer Cement

ABSTRACT Background Dentinal sealers (desensitizing agents) are used to protect the pulp from possible injurious effects after tooth preparation and also prevent the penetration of dentinal tubules by bacteria and their products which are currently thought to cause most of the pulpal inflammation under the crowns. Aim The purpose of this study is to determine the efficacy of effect of three different desensitizing agents on retention of crowns cemented with resin-modified glass ionomer cement. Materials and methods Forty freshly extracted maxillary first premolars were notched for retention and the teeth specimens were mounted in autopolymerising resin. The axial height of all the specimens was 4 mm with a 20° angle of convergence. Impressions of the prepared teeth were made, later waxed invested and casted. Thirty teeth were coated with three different desensitizing agents were used in this study: Cavity varnish (Namuvar, Deepti Dental Products), Glutaraldehyde (Gluma- Heraeus Kulzer), Resin (AdheSE, Ivoclar Vivadent). Ten teeth were not coated with desensitizing agents to act as control group. Independent T test used to compare the mean values between groups. Results Tensile strength for average surface area of the groups I, II, III and IV are 0.3759, 0.2375, 0.2411, 0.2348 respectively. The t-test shows ‘p’-value is statistically not significant (p < 0.05) for groups II and III, where as in group IV ‘p’-value is statistically significant (p < 0.01). Conclusion The use of AdheSE/resin-based dentinal sealer showed increase in bond strength of the crowns luted with resin-modified glass ionomer cement when compared with control group. This study advocates the use of resin-based sealer or a glutaraldehyde-based sealer before cementation of the crowns. The cavity varnish, however, reduces the bond strength and is not acceptable. How to cite this article Janapala SDR, Reddy PS, Jain AR, Pradeep R. The Effect of Three Dentinal Sealers on Retention of Crowns cemented with Resin-modified Glass Ionomer Cement: An in vitro Study. World J Dent 2015;6(1):10-15.

scholarly journals The impact of occlusal morphology on fissure sealant penetration

2006 ◽  
Vol 53 (2) ◽  
pp. 87-94
Author(s):  
Bojan Petrovic ◽  
Dejan Markovic ◽  
Duska Blagojevic
Keyword(s):  
Glass Ionomer ◽  
Fissure Sealants ◽  
Depth Of Penetration ◽  
Fissure Sealant ◽  
Group I ◽  
Significant Difference ◽  
Penetration Ability ◽  
The Impact ◽  
Pits And Fissures

Introduction: In contemporary preventive dentistry there are numerous experimental in vitro and clinical studies on the growing number of materials for sealing pits and fissures. Aim: the aim of this study was to evaluate the impact of occlusal tooth morphology on penetrating abilities of two types of fissure sealants and measure the unfilled space at the bottom of occlusal groove using scanning electron microscopy (SEM). Materials and methods: The sample consisted of 10 freshly extraced intact premolars and 10 molars randomly divided into 4 groups. In group I (5 premolars), and group II (5 molars) glass ionomer Fuji VII was used as fissure sealant, while in groups III (5 premolars) and IV (5 molars) resin-based sealant (Helioseal-F) was used. Six sections of each tooth were prepared for SEM. Sealant penetration was observed at 30x magnification and the unfilled space at the bottom of the groove at 500x. Sealant penetration in relation to the absolute depth of occlusal grooves was recorded and the unfilled space beneath the sealant was expressed through its greatest diameter. Results were statistically analyzed using ?2 test. Results: There was no statistically significant difference in penetration ability and the unfilled space between tested materials or teeth groups. The average depth of penetration for glass ionomer was 83% and for resin-based sealant 81% of fissure depth. Mean diameters of the unfilled space beneath the sealants were 95 ?m (glass ionomer) and 93 ?m (resin-based sealant). Shallower penetration of both sealing materials was observed in deep pits and fissures with greater diameter of unfilled space (p<0.05). Conclusion: Based on results of the present study it can be concluded that penetration of contemporary fissure sealants largely depends on occlusal tooth anatomy.

scholarly journals Effect of Rebonding on the Bond Strength of Orthodontic Tubes: A Comparison of Light Cure Adhesive and Resin-Modified Glass Ionomer Cement In Vitro

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Monika Aleksiejunaite ◽  
Antanas Sidlauskas ◽  
Arunas Vasiliauskas
Keyword(s):  
Bond Strength ◽  
Testing Machine ◽  
Glass Ionomer Cement ◽  
Glass Ionomer ◽  
Significant Difference ◽  
Resin Modified Glass Ionomer ◽  
Bond Strengths ◽  
Group 2 ◽  
The Impact

The purpose of this study was to determine the impact of different enamel preparation procedures and compare light cure composite (LCC) and resin-modified glass ionomer (RMGI) on the bond strength of orthodontic metal tubes rebonded to the enamel. Twenty human molars were divided into two groups (n=10). Tubes were bonded using LCC (Transbond XT) in group 1 and RMGI (Fuji Ortho LC) in group 2. The tubes in each group were bonded following manufacturers’ instructions (experiment I) and then debonded using testing machine. Then, the same brackets were sandblasted and rebonded twice. Before the first rebonding, the enamel was cleaned using carbide bur (experiment II) and before second rebonding, it was cleaned using carbide bur and soda blasted (experiment III). Mann–Whitney and Wilcoxon signed-rank tests showed no significant difference between RMGI and LCC bond strengths in case of normal bonding and rebonding, when enamel was cleaned using carbide bur before rebonding. Enamel soda blasting before rebonding significantly increased RMGI tensile bond strength value compared to LLC (p<0.05). LCC and RMGI (especially RMGI) provide sufficient bond strengths for rebonding of molar tubes, when residual adhesive from previous bonding is removed and enamel soda blasted.

scholarly journals Pit and fissure sealants penetration capacity and their correlation with fissure morphology

2019 ◽  
Vol 92 ◽  
pp. S50-S54
Author(s):  
Alexandrina Muntean ◽  
Meda-Romana Simu ◽  
Raluca Suhani ◽  
Anca Stefania Mesaros
Keyword(s):  
In Vitro Study ◽  
Glass Ionomer ◽  
Fissure Sealants ◽  
Depth Of Penetration ◽  
Fissure Sealant ◽  
Pit And Fissure Sealants ◽  
Group I ◽  
Occlusal Surfaces ◽  
Resin Modified Glass Ionomer

Background and aims. Pit and fissure sealant placement corresponds to an effective approach of the prevention of caries on occlusal surfaces. Fissure morphology and dental material characteristics are the key factors for sealant effectiveness. The aim of this in vitro study was to compare the penetration ability of two commercially available pit and fissure sealants. Methods. Twenty sound human premolars extracted for orthodontic purpose have been sealed according to manufacturer’s instructions as follows: Group I (n=10), light-cured unfilled resin-based sealant, Admira Seal® (Voco GmbH); Group II (n=10), resin modified glass ionomer sealant without varnish, GC Fuji Triage® (GC Corporation). The teeth have been sectioned buccal-lingually in the middle of the occlusal surface, and the sections were examined at 40x with an inverted microscope. Results. Penetration of the sealants was found to be greater in U-type fissure pattern (91.69%) followed by V-type (75.42%), IK-type (71.24%) and then in I-type (63.98%). The depth of penetration of GC Fuji Triage® (82.85%) demonstrated to be superior to Admira Seal® (76.28%). Conclusion. U fissure design was more common than other fissure patterns and showed significantly higher penetration for the two type of sealants evaluated. Resin modified glass ionomer sealant used in the present study perform comparably with the filled resin sealant.

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.

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