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Aim And Background: This study compares the hardness of ceramic-reinforced glass ionomer cement (Amalgomer CR), resin-modified glass ionomer cement (RMGIC), and conventional glass ionomer cement (GIC) using Vicker's microhardness tester.
Materials And Methods: Nine disc-shaped specimens (5mm diameter, 2mm thickness) were prepared from three materials: Group A (GIC), Group B (Amalgomer CR), and Group C (RMGIC). Hardness was tested after 24 hours of storage at room temperature.
Result: Group B showed the highest mean hardness (66.13±5.25), followed by Group A (65.63±8.07) and Group C (62.13±13.70). Differences were not statistically significant.
Conclusion: Although Amalgomer CR exhibited slightly higher hardness due to its ceramic component, the differences among the materials were not statistically significant. Clinical significance: Hardness is a key property for dental restorations, ensuring durability by resisting deformation and maintaining integrity during mastication.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12244940 | PMC |
http://dx.doi.org/10.4103/jpbs.jpbs_1947_24 | DOI Listing |
J Dent
September 2025
Department of Restorative Dentistry, Faculty of Dentistry, Malaya University, Kuala Lumpur, Malaysia. Electronic address:
Objectives: to evaluate the effect of smear-layer deproteinization using papain gel and SPRG-adhesive on marginal-gap, anti-demineralization of enamel and dentin after chemical pH cycling and assess acid-base resistance zone (ABRZ) characteristics.
Methods: Cylindrical cavities were prepared cervically in thirty-two extracted premolars. Teeth were divided into two pretreatment groups (n=16); deproteinization with papain enzyme gel (Papacarie Due, Brazil) for 60 second, and no-deproteinization.
J Dent
September 2025
Faculty of Dentistry, National University of Singapore, Singapore; Saw Swee Hock School of Public Health, National University of Singapore, Singapore.
Objective: To assess the cost-effectiveness of silver diamine fluoride (SDF) relative to sodium fluoride (NaF) and traditional resin-modified glass ionomer cements (RMGIC) restorations for the management of root caries in older adults aged 60 and above.
Methods: A Markov model design was chosen and two models were constructed: 1) Clinic-based model - with access to dental facility that allows for placement of traditional restorations, 2) Community-based model - without access to dental facility due to mobility, lack of executive function, or financial barriers. Modelling was done over a 10-year time horizon with a cycle length of one year.
Br Dent J
September 2025
Professor, Istanbul Medipol University Faculty of Dentistry, Department of Prosthodontics Dentistry, İstanbul, Turkey.
Purpose The aim of this study was to assess the effectiveness of a PEEK (polyether-ether-ketone) ultrasonic tip in the cleaning around implant-supported restorations and to evaluate the effect of different cement types on the amount of residual cement at the restoration margins.Materials and methods A master model with an implant analogue placed in the upper left first premolar region was used to create 72 cast models and zirconia crowns were fabricated for each model. A total of 72 zirconia crowns were divided into two main groups based on the cleaning method applied after cementation.
View Article and Find Full Text PDFJ Dent
September 2025
Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Institute of Science Tokyo, Tokyo, Japan.
Objective: This study evaluated the ability of a novel zinc-releasing glass ionomer cement (GIC), Caredyne Restore (CR), to inhibit matrix metalloproteinase (MMP) activity and preserve dentin collagen integrity, compared with a conventional GIC (Fuji IX, FIX) and chlorhexidine (CHX), a widely used MMP inhibitor.
Methods: Demineralized bovine dentin beams were allocated to four groups: deionized water (negative control), CHX (positive control), FIX eluate, and CR eluate. MMP Activity was assessed before and after treatment using a colorimetric assay.
Sci Rep
August 2025
Postgraduation Program in Biophotonic Medicine, Universidade Nove de Julho, UNINOVE, Rua Vergueiro, 235/249 - Liberdade, São Paulo, SP, 01504-000, Brazil.
This study evaluated the impact of photobiomodulation (PBM) combined with glass ionomer sealant on hypersensitivity, oral hygiene, and sealant retention in molars affected by molar incisor hypomineralization (MIH). Forty-nine children (6-12 years) with MIH (Grade 3, 4a, or 4b) per MIH-TNI criteria were randomly assigned to two groups: control (n = 25, fluoride toothpaste, sealant with self-curing glass ionomer cement, simulated PBM) and treatment (n = 24, fluoride toothpaste, sealant with self-curing glass ionomer cement, active PBM). Hypersensitivity (SCASS, VAS), oral hygiene (OHI-S), and sealant retention (CCC system) were assessed.
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