Evaluation of the effect of micro-hydroxyapatite incorporation on the diametral tensile strength of glass ionomer cements

Sharafeddin, Farahnaz; Karimi, Shokooh; Jowkar, Zahra

doi:10.4103/jcd.jcd_6_19

Cited by 7 publications

(4 citation statements)

References 17 publications

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“…[ 12 ] Carbon nanotubes (CNTs), invented by Kroto have shown potential in improving the mechanical, biological, and structural properties of various materials, including biomaterials. [ 13 14 15 ] The composition of CNTs in biomaterials can significantly influence their bioactivity, with a higher CNT content offering improved mechanical and electrical characteristics.…”

Section: Discussionmentioning

confidence: 99%

Effects of novel additives on the mechanical and Biological properties of glass ionomer cement: An in vitro study

Piyush,

Kalyan,

Aparna

et al. 2024

Journal of Conservative Dentistry and Endodontics

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Aim: To evaluate the efficacy of incorporated novel additives in Glass Ionomer Cement to ameliorate biocompatibility and mechanical properties. Introduction: Though Glass Ionomer Cement (GIC) has multiple advantages, it is not strong enough for medical applications, and its biocompatibility is questionable. To improve biocompatibility and its mechanical properties, a study was performed to investigate the potential benefits of adding graphene, carbon nanotubes, hydroxyapatite, and bioactive glass to GIC. The objective was to enhance both the mechanical properties and biocompatibility of GIC. Material and Method: Modified Glass Ionomer Cement was prepared by creating five groups. Hydroxyapatite, multi-walled carbon nanotubes, graphene, and bioactive glass were incorporated in a 10:1 weight ratio, respectively. Group 5 was designated as the control group and used Fuji Type II GIC. After preparing 90 samples, they were kept in deionized water for a day and then evaluated their compressive strength, microhardness, and diametral tensile strength, and also checked their in vitro cytotoxicity by direct contact with L929 mammalian fibroblast cells. Statistical Analysis: The data were examined using mean and standard deviation descriptive statistics. The comparative evaluation was done via Tukey HSD test and one-way ANOVA using S.P.S.S. software. Result: It showed that Group 3 had better results in compressive strength (144.478+- 3.989), diametral tensile strength (20.29+- 0.8601), and microhardness (131+-3.536) when compared with other groups while in the biocompatibility (viability %) Group 1 [82.55], Group 3 [76.49], Group 4 [87.63], while Group 2[58.02]. Conclusion: Group 3 has better physical properties in microhardness, diametral tensile strength, and compressive strength, than the other groups. In Biocompatibility, Group 1, Group 3, Group 4, and Group 5 were noncytotoxic at the same time multi-walled carbon nanotubes group (Group 2) had cytotoxic potential.

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Section: Discussionmentioning

confidence: 99%

Effects of novel additives on the mechanical and Biological properties of glass ionomer cement: An in vitro study

Piyush,

Kalyan,

Aparna

et al. 2024

Journal of Conservative Dentistry and Endodontics

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“…Recently, fillers with nanometer size have been added to improve the properties of GICs (Sharafeddin et al, 2019). Nanotechnology means the creation of materials with dimensions less than 100 nm (Ge et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Different materials such as fibers, nanoparticles, and zirconia have been used to strengthen the mechanical properties of GICs. Recently, fillers with nanometer size have been added to improve the properties of GICs (Sharafeddin et al, 2019 ). Nanotechnology means the creation of materials with dimensions less than 100 nm (Ge et al, 2018 ).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of nano‐graphene oxide on shear bond strength of conventional and resin‐modified glass ionomer cement

Ghodrati,

Sharafeddin

2023

Clinical & Exp Dental Res

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ObjectivesRecently, nano‐graphene oxide (nGO), a material with unique mechanical properties, has been introduced to improve the properties of glass ionomer cement (GIC). The purpose of this study was to investigate the effect of adding nGO on the shear bond strength (SBS) of conventional (CGIC) and resin‐modified GIC (RMGIC).MethodsSixty intact molars were mounted and their occlusal surface was cut at a depth of 1 mm below the dentinoenamel junction. 1 wt.% and 2 wt.% of nGO (US Research Nanomaterials, Inc.) were added to CGIC and RMGIC (GC Corporation). The samples were randomly divided into six groups (n = 10), including 1: CGIC, 2: CGIC + 1% GO, 3: CGIC + 2% GO, 4: RMGIC, 5: RMGIC + 1% GO, and 6: RMGIC + 2% GO. Plastic molds were placed on the surface of the dentin pretreated with 10% polyacrylic acid (GC Corporation) and filled with prepared cement according to the manufacturer's instruction. After 24 h of storage in an incubator, the SBS test was done by the universal testing machine. Data were analyzed using two‐way analysis of variance and post hoc Tukey tests (p < .05).ResultsIn the group of CGIC, mean SBS was significantly lower than all other study groups (p < .001), and groups 5 (RMGIC + 1% GO) and 6 (RMGIC + 2% GO) showed significantly higher values compared to all other study groups (p < .001). However, the difference between groups 2 and 3, as well as the difference between groups 5 and 6, was not significant (p = .999 andp = .994, respectively). RMGI groups had significantly higher SBS than their corresponding CGIC groups.ConclusionsThe addition of 1% and 2% nGO significantly increased the SBS of CGIC and RMGIC to the dentin, which can be considered as a promising point for wider clinical application of this material.

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“…The need to improve the mechanical properties of the glass ionomer cement (GIC) has increased research on this material [9]. To improve the mechanical and physical properties of GICs, various materials such as metal powders, glass fibers, silica hydroxyapatite, and zirconia fillers have been used [10].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Effect of Nanographene Oxide on Microleakage of Conventional and Resin-Modified Glass Ionomer

Sharafeddin,

Ghodrati

2023

International Journal of Dentistry

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Objectives. One of the important features of the restorative materials is the ability to seal and prevent the microleakage. Glass ionomer cement (GIC) still exhibits some microleakage despite establishing a chemical bond to the tooth. The aim of this study was to evaluate the effect of nanographene oxide (nGO) on the microleakage of conventional (CGIC) and resin-modified glass ionomer cement (RMGIC). Methods. Thirty intact extracted molars were used. Class V cavities were prepared on their buccal and lingual surfaces. The samples randomly divided into two main groups of CGIC and RMGIC; each of them was randomly subdivided into three subgroups, including the group without nGO (control), the group with 1% nGO, and the group with 2% nGO. After restoring the cavities, they were subjected to thermocycling (1,000 cycles at 5/55°C). Two percent basic fuchsin solution was used to perform the microleakage test, and then the sectioned samples were examined by a stereomicroscope 40x. Kruskal–Wallis test, Dunn’s test, and Mann–Whitney U test were used to analyze the data ( P < 0.05 ). Results. Group CGIC + 1% nGO at the gingival margin and group RMGIC + 1% nGO at both gingival and occlusal margins had significantly less microleakage than their control groups ( P = 0.008 , P = 0.002 , P = 0.023 , respectively). Also, in these two groups, there were no significant differences between the microleakage of the occlusal and gingival margins ( P = 0.132 , P = 0.511 , respectively), while in all other groups, the gingival microleakage was significantly higher than that of occlusal microleakage. Conclusions. The addition of 1% nGO significantly reduced the gingival microleakage of CGIC and the occlusal and the gingival microleakage of RMGIC, while the addition of 2% nGO did not cause a significant reduction in microleakage.

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Evaluation of the effect of micro-hydroxyapatite incorporation on the diametral tensile strength of glass ionomer cements

Cited by 7 publications

References 17 publications

Effects of novel additives on the mechanical and Biological properties of glass ionomer cement: An in vitro study

Effects of novel additives on the mechanical and Biological properties of glass ionomer cement: An in vitro study

Evaluation of the effect of nano‐graphene oxide on shear bond strength of conventional and resin‐modified glass ionomer cement

Evaluation of the Effect of Nanographene Oxide on Microleakage of Conventional and Resin-Modified Glass Ionomer

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