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Panpisut P, Toneluck A, Khamsuk C, Channasanon S, Tanodekaew S, Monmaturapoj N, Naruphontjirakul P. The development of resin-coating materials for enhancing elemental release of coated glass ionomer cements. Heliyon 2024; 10:e34512. [PMID: 39113968 PMCID: PMC11305317 DOI: 10.1016/j.heliyon.2024.e34512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Revised: 07/07/2024] [Accepted: 07/10/2024] [Indexed: 08/10/2024] Open
Abstract
This study aimed to develop resin coatings containing monocalcium phosphate monohydrate (MCPM), Sr/F-doped bioactive glass (Sr/F-BAGs), and pre-reacted glass ionomer fillers (SPG) that enhance ion release without detrimentally affecting the mechanical properties of GIC. The objective of this study was to evaluate the degree of monomer conversion (DC), biaxial flexural strength, surface microhardness, and ion release of the GICs coated with experimental coating materials compared to a commercial product (EQUIA Coat, EC). Four experimental resin coating materials containing 10-20 wt% of MCPM with Sr/F-BAGs and 5-10 wt% SPG were prepared. The DC of the coating material was determined using ATR-FTIR. The flexural strength and surface microhardness of the coated GICs were assessed. Fluoride and elemental (Ca,P,Sr,Si,Al) release were measured using fluoride-specific electrodes and ICP-OES. The DC of the experimental coating material (60-69 %) was higher than that of EC (55 %). The strength of GICs coated with experimental materials (35-40 MPa) was comparable to EC (37 MPa). However, their surface microhardness (13-24 VHN) was lower than EC (44 VHN). The experimental coating materials reduced fluoride release by ∼43 %, similar to EC (∼40 %). However, experimental coating materials promoted higher P and Sr release than EC. In conclusion, GICs coated with the experimental resin coating containing ion-releasing additives exhibited mechanical properties similar to those of the commercial product. The new coating materials promoted a higher level of ion release for GICs. These properties could potentially enhance remineralizing actions for the coated GICs.
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Affiliation(s)
- Piyaphong Panpisut
- Faculty of Dentistry, Thammasat University, Pathum Thani, 12120, Thailand
- Thammasat University Research Unit in Dental and Bone Substitute Biomaterials, Thammasat University, Pathum Thani, 12120, Thailand
| | - Arnit Toneluck
- Faculty of Dentistry, Thammasat University, Pathum Thani, 12120, Thailand
| | - Chutikarn Khamsuk
- Assistive Technology and Medical Devices Research Center (A-MED), National Science and Technology Development Agency, Pathum Thani, 12120, Thailand
| | - Somruethai Channasanon
- National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, Pathum Thani, 12120, Thailand
| | - Siriporn Tanodekaew
- National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency, Pathum Thani, 12120, Thailand
| | - Naruporn Monmaturapoj
- Assistive Technology and Medical Devices Research Center (A-MED), National Science and Technology Development Agency, Pathum Thani, 12120, Thailand
| | - Parichart Naruphontjirakul
- Biological Engineering Program, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand
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Abo-Alazm EAE, Abdou A, Hassouneh L, Safy RK. Reliability of an Innovative Slab Shear versus Microtensile Bond Strength Test: Mechanical and Finite Element Analysis. Eur J Dent 2024; 18:182-195. [PMID: 37059444 PMCID: PMC10959604 DOI: 10.1055/s-0043-1763498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2023] Open
Abstract
OBJECTIVE The aim of this study was to evaluate the efficiency of slab shear bond strength test (Slab_SBS) versus the microtensile in evaluation of the bond strength of different substrates. MATERIALS AND METHODS Forty-eight extracted caries-free human third molars were utilized for teeth specimens' preparation. After flattening of all molars' occlusal table, the specimens were divided into two groups based on the type of utilized restorative material: nanohybrid resin composite and resin-modified glass ionomer (RMGI). Each group was further subdivided into three subgroups according to the subsequently applied bond strength test and specimen width; microtensile bond strength test (μTBS), Slab_SBS [2 mm] and Slab_SBS [3 mm]. Both testing methods were additionally applied on CAD/CAM specimens, nanohybrid resin composite blocks (composite-to-composite), and ceramic blocks (ceramic-to-ceramic). CAD/CAM specimens were prepared and cemented and then sectioned and subdivided as followed for teeth specimens' preparation. Pretest failures (PTF), bond strength, and failure mode of each specimen were recorded. Representative three-dimensional (3D) finite element analysis (FEA) models were developed to simulate μTBS and Slab_SBS specimens. Data were statistically analyzed using Shapiro-Wilk test and Weibull analysis. RESULTS Pretest failures were only noted in the μTBS subgroups. Slab_SBS provided comparable bond strength to the μTBS of all substrates with adhesive mode of failure. CONCLUSION Slab_SBS is easier to prepare with consistent and predictable outcome with no pretest failures during specimen preparation and better stress distribution.
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Affiliation(s)
| | - Ahmed Abdou
- Department of Prosthetic Dentistry, Biomaterials Division, Faculty of Dentistry, King Salman International University, El Tur, South Sinai, Egypt
| | - Layla Hassouneh
- Department of Conservative Dentistry, Jordan University of Science and Technology, Ar-Ramtha, Jordan
| | - Rehab Khalil Safy
- Department of Conservative Dentistry, Suez Canal University, Ismailia Governorate, Egypt
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Thomas HA, Singh N, Thomas AM, Masih S, Cherian JM, Varghese KG. Effect of protective coating agents on microleakage and flexural strength of glass ionomer cement and zirconomer. an in vitro study. Eur Arch Paediatr Dent 2024; 25:57-63. [PMID: 37991624 DOI: 10.1007/s40368-023-00853-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 10/25/2023] [Indexed: 11/23/2023]
Abstract
PURPOSE The objective of this study was to assess the microleakage and flexural strength of glass ionomer cement (GIC) and modified GIC (Zirconomer) when coated with protective coating agents such as COAT-IT and G-COAT plus. METHODS Sixty tooth specimens were grouped into two groups based on the type of restorations (GIC (n = 30) and Zirconomer (n = 30)). The samples were further divided into three subgroups (n = 10) based on the protective coating agent (Petroleum jelly, G-COAT Plus, or COAT IT) applied. This study evaluated the microleakage at the occlusal and cervical margins of class V restoration after being subjected to dye penetration and sectioning. Each specimen was viewed under a 40 × microscope and was given scores based on the depth of dye penetration. They were statistically analyzed using the Kruskal-Wallis test and compared within the groups using the Mann- Whitney Test. In addition, flexural strength was assessed using standardized cuboid (25 × 2 × 2 mm) specimens of restorative materials with and without protective coating agents. The mean flexural strength data of all the subgroups were statistically evaluated using a one-way analysis of variance (ANOVA) and compared within the subgroups using the student t test. RESULTS A statistically significant difference was found when occlusal margin microleakage scores were evaluated with G-COAT Plus demonstrating the lowest occlusal margin microleakage when applied over GIC restoration. The increasing order of occlusal margin microleakage scores is as follows: GIC with G-COAT Plus, Zirconomer with COAT-IT, GIC with COAT-IT, GIC, Zirconomer with G-COAT Plus, and Zirconomer. However, the cervical margin microleakage scores revealed no significant difference. While flexural strength was found to be highest for the GIC group coated with G-COAT Plus, it was observed that there was a significant improvement in the flexural strength of both GIC and Zirconomer when coated with either of the protective coating agents. CONCLUSION Within the limitations of this in vitro study, it was observed that the application of protective coating agents can significantly reduce the potential microleakage and improve the flexural strength of the restorative material especially when zirconia-reinforced GIC is the restorative material.
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Affiliation(s)
- H A Thomas
- Department of Pedodontics and Preventive Dentistry, Christian Dental College, Ludhiana, Punjab, India.
| | - N Singh
- Department of Pedodontics and Preventive Dentistry, Christian Dental College, Ludhiana, Punjab, India
| | - A M Thomas
- Department of Pedodontics and Preventive Dentistry, Christian Dental College, Ludhiana, Punjab, India
| | - S Masih
- Department of Pedodontics and Preventive Dentistry, Christian Dental College, Ludhiana, Punjab, India
| | - J M Cherian
- Department of Pedodontics and Preventive Dentistry, Christian Dental College, Ludhiana, Punjab, India
| | - K G Varghese
- Department of Prosthodontics and Crown and Bridge, Christian Dental College, Ludhiana, Punjab, India
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Krajangta N, Dulsamphan C, Chotitanmapong T. Effects of Protective Surface Coating on Fluoride Release and Recharge of Recent Uncoated High-Viscosity Glass Ionomer Cement. Dent J (Basel) 2022; 10:dj10120233. [PMID: 36547049 PMCID: PMC9777000 DOI: 10.3390/dj10120233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 11/21/2022] [Accepted: 12/01/2022] [Indexed: 12/13/2022] Open
Abstract
The ability to release and recharge fluoride is a property of glass ionomer cement materials, which is an advantage for patients with a high caries risk. The purpose of this study was to evaluate the amount of released and recharged fluoride in recent uncoated high-viscosity glass ionomer cement (KetacTM Universal AplicapTM) with different surface coatings and at different time points. In total, 135 cylindrical-shaped specimens were equally divided into the following three groups: KetacTM Universal AplicapTM, KetacTM Molar AplicapTM, and KetacTM Fil Plus AplicapTM. The different coatings performed on each group were as follows: uncoated, coated with KetacTM Glaze, and coated with G-Coat PlusTM. The amounts of released and recharged fluoride were measured at 24 h and at weeks 1, 2, 3, and 4. The recharging agent was a 1.23% APF gel. KetacTM Universal AplicapTM showed the highest released fluoride at all time points and the highest recharged fluoride at weeks 1, 2, and 3. Both the KetacTM Glaze- and G-Coat PlusTM-coated specimens presented significantly lower released and recharged fluoride ions than the uncoated group at all time points (p < 0.001). Coating with G-Coat PlusTM significantly decreased the released and recharged fluoride compared to the coating with KetacTM Glaze at almost all time points (p < 0.05), except for weeks 1 and 2. The application of coating agents reduced the amount of released and recharged fluoride by the KetacTM Universal AplicapTM.
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Affiliation(s)
- Nantawan Krajangta
- Division of Restorative Dentistry, Faculty of Dentistry, Thammasat University, Bangkok 10200, Thailand
| | | | - Tongjai Chotitanmapong
- Division of Pediatric Dentistry, Faculty of Dentistry, Thammasat University, Bangkok 10200, Thailand
- Correspondence: ; Tel.: +66-814095550
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Ganesh S, Ganesh SB, Jayalakshmi S. Effect of carbonated beverages on flexural strength property of restorative glass ionomer cement. J Adv Pharm Technol Res 2022; 13:S186-S189. [PMID: 36643106 PMCID: PMC9836160 DOI: 10.4103/japtr.japtr_265_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 07/17/2022] [Indexed: 01/17/2023] Open
Abstract
Glass ionomer cement (GIC) releases fluorides and has good biocompatibility, carbonated drinks, sometimes known as fizzy drinks, are carbonated liquids that contain dissolved carbon dioxide, sweeteners, and natural or artificial flavoring. The aim of our study is to determine the flexural strength of GIC after immersing in carbonated beverages. Twelve samples of GIC filling material were used among which six samples prepared were from the Dtech brand and six were prepared from the Shofu brand for the in vitro study. Bar-shaped specimens were prepared from each group with the dimension of 2 mm × 2 mm × 25 mm. They were immersed in Sprite, fizz drinks, and in distilled water as a control group. The immersion period was 7 days. Then, the determination of maximum force and displacement was done using INSTRON E3000 (ElectroPuls) universal testing machine, then the collected data were used to determine flexural strength. The mean flexural strength of Dtech GIC was 24.84 ± 6.523 Mpa. The mean flexural strength of Dtech GIC was 18.57 ± 11.60 Mpa. The independent sample t-test showed that P = 0.247 (>0.05) which was statistically not significant. The flexural strength of GIC material decreased after being immersed in Sprite and fizz drinks.
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Affiliation(s)
- S. Ganesh
- Undergraduate Student, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
| | - S. Balaji Ganesh
- White Lab - Material Research Centre, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India,Address for correspondence: Dr. S. Balaji Ganesh, White Lab - Material Research Centre, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai - 600 077, Tamil Nadu, India. E-mail:
| | - S. Jayalakshmi
- White Lab - Material Research Centre, Saveetha Dental College and Hospital, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, Tamil Nadu, India
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Zheng BW, Cao S, Al-Somairi MAA, He J, Liu Y. Effect of enamel-surface modifications on shear bond strength using different adhesive materials. BMC Oral Health 2022; 22:224. [PMID: 35672818 PMCID: PMC9175421 DOI: 10.1186/s12903-022-02254-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 05/30/2022] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND This study aimed to investigate the effect of enamel-surface modifications on the shear bond strength between ceramic brackets bonded using different adhesive materials and the enamel surface and to identify the most suitable clinical adhesive and bonding method. Whether the non-acid-etching treatment met the clinical bond strength was also determined. METHODS A total of 108 extracted premolars were divided into nine groups (n = 12) based on the different enamel-surface modification techniques (acid etching, deproteinization, and wetting). Group 1 was bonded with Transbond™ XT adhesive, whereas groups 2-9 were bonded with resin-modified glass ionomer cement (RMGIC). The treatment methods for each group were as follows: groups 1 and 2, acid etching; group 3, acid etching and wetting; group 4, acid etching and deproteinization; group 5, acid etching, deproteinization, and wetting; group 6, deproteinization; group 7, deproteinization and wetting; group 8, without treatment; and group 9, wetting. The samples' shear bond strength was measured using an universal testing machine. Adhesive remnant index (ARI) was examined using a stereomicroscope. The enamel-surface morphology was observed with a scanning electron microscope. One-way ANOVA with Tukey's post-hoc test and chi-square test were used for statistical analysis, and p < 0.05 and α = 0.05 were considered statistically significant. RESULTS The ARIs of groups 1-5 and 6-9 were statistically significant (p = 0.000). The enamel surface of groups 1-5 was demineralized, and only a tiny amount of protein remained in groups 7 and 8, whereas a thick layer of protein remained in groups 8 and 9. CONCLUSIONS RMGIC adhesive did not damage the enamel surface and achieved the required clinical bond strength. The enamel surface was better treated with 5.25% sodium hypochlorite preferably under non-acid-etching conditions.
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Affiliation(s)
- Bo-Wen Zheng
- Department of Orthodontics, School and Hospital of Stomatology, Liaoning Provincial Key Laboratory of Oral Diseases, China Medical University, Shenyang, 110002, China
| | - Shan Cao
- Department of Orthodontics, School and Hospital of Stomatology, Liaoning Provincial Key Laboratory of Oral Diseases, China Medical University, Shenyang, 110002, China
| | - Majedh Abdo Ali Al-Somairi
- Department of Orthodontics, School and Hospital of Stomatology, Liaoning Provincial Key Laboratory of Oral Diseases, China Medical University, Shenyang, 110002, China
- Department of Orthodontics and Dentofacial Orthopedics, Faculty of Dentistry, Ibb University, Ibb, Republic of Yemen
| | - Jia He
- Department of Orthodontics, School and Hospital of Stomatology, Liaoning Provincial Key Laboratory of Oral Diseases, China Medical University, Shenyang, 110002, China
| | - Yi Liu
- Department of Orthodontics, School and Hospital of Stomatology, Liaoning Provincial Key Laboratory of Oral Diseases, China Medical University, Shenyang, 110002, China.
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