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https://www.readbyqxmd.com/read/28642924/influence-of-niobium-pentoxide-addition-on-the-properties-of-glass-ionomer-cements
#1
Isadora Martini Garcia, Vicente Castelo Branco Leitune, Gabriela De Souza Balbinot, Susana Maria Werner Samuel, Fabrício Mezzomo Collares
Objective: To determine the influence of niobium pentoxide (Nb2O5) addition on the physical and chemical properties of glass ionomer cements (GICs). Materials and methods: Five, 10 or 20 wt.% of Nb2O5 were incorporated into commercial GICs (Maxxion R, Vitro Molar, Vitro Fil R) and one group of each GIC remained without Nb2O5 (control groups). The GICs were evaluated by Knoop hardness, compressive strength, acid erosion, particle size and radiopacity. Data were analyzed by two-way ANOVA followed by Tukey's test...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642913/the-effect-of-petroleum-jelly-light-cured-varnish-and-different-storage-media-on-the-flexural-strength-of-glass-ionomer-dental-cements
#2
Kristina Gorseta, Domagoj Glavina, Tomislav Skrinjaric, Beata Czarnecka, John W Nicholson
This study determined the influence of coating with either petroleum jelly or light-cured varnish and storage medium on the flexural strength of glass-ionomer cements (GIC). The flexural strength of two glass-ionomer cements (Fuji Equia Fil and Ketac Molar Aplicap) was measured. Specimens (2 × 2 × 25 mm) were prepared in three groups: uncoated, coated with petroleum jelly, or coated with light-cured varnish (EquiaCoat) cured for 20 s using a cure lamp (Bluephase G2, Ivoclar Vivadent, Schaan, Liechtenstein)...
December 2016: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642057/novel-multifunctional-dental-cement-to-prevent-enamel-demineralization-near-orthodontic-brackets
#3
Yansong Ma, Ning Zhang, Michael D Weir, Yuxing Bai, Hockin H K Xu
OBJECTIVES: White spot lesions due to biofilm acid-induced enamel demineralization are prevalent in orthodontic treatments. The aim of this study was to develop a novel bioactive multifunctional cement with protein-repellent, antibacterial and remineralizing capabilities, and investigate the effects on enamel hardness and lesion depth in vitro for the first time. MATERIALS AND METHODS: 2-Methacryloyloxyethyl phosphorylcholine (MPC), dimethylaminohexadecyl methacrylate (DMAHDM), and nanoparticles of amorphous calcium phosphate (NACP) were incorporated into a resin-modified glass ionomer (RMGI)...
June 19, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28638560/effects-of-different-percentages-of-microhydroxyapatite-on-microhardness-of-resin-modified-glass-ionomer-and-zirconomer
#4
Farahnaz Sharafeddin, Soodabe Shoale, Mahsa Kowkabi
BACKGROUND: Hydroxyapatite (HA) is the main mineral component of the tooth structure, which exhibits considerable biological behavior and its incorporation might improve microhardness of dental materials. Microhardness of restorative materials, like glass-ionomer, is critical for the clinical longevity of restorations. The aim of this study was to evaluate the microhardness of two glass-ionomers types by incorporating different percentages of microhydroxyapatite. MATERIAL AND METHODS: In this study, 80 disc-shaped experimental specimens (6 mm in diameter, 2 mm in height) were prepared in 8 groups, including resin-modified glass-ionomer (RMGI, GC, Gold Label, Japan), zirconia-reinforced glass-ionomer (Zirconomer, Shofu, Kyoto, Japan), and their mixture with 0, 5, 15 and 25 wt% of microhydroxyapatite (Sigma-Aldrich, Germany)...
June 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28621270/influence-of-hand-instrumentation-and-ultrasonic-scaling-on-the-microleakage-of-various-cervical-restorations-an-in-vitro-study
#5
Bita Rohani, Mehrdad Barekatain, Shirin Z Farhad, Navid Haghayegh
INTRODUCTION: In cervical lesions, various restorative materials can be inserted, which can be affected by the application of periodontal scalers. This study evaluated and compared the marginal seal of class V glass ionomer, composite resin, and amalgam restorations after subjecting them to hand instrumentation and ultrasonic scaling. MATERIALS AND METHODS: In this experimental study, 30 sound human first premolars were selected. In each tooth, buccal and lingual cavities (4 mm mesiodistal width, 3 mm occlusogingival height, and 2 mm depth) were made...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28618104/effect-of-two-different-polishing-systems-on-fluoride-release-surface-roughness-and-bacterial-adhesion-of-newly-developed-restorative-materials
#6
Gokcen Deniz Bayrak, Nuket Sandalli, Senem Selvi-Kuvvetli, Nursen Topcuoglu, Guven Kulekci
OBJECTIVES: To evaluate the effects of two different polishing systems on fluoride release, surface roughness and bacterial adhesion of five restorative materials MATERIALS AND METHODS: The study groups were comprised of five different restorative materials, Beautifil II (B); GCP Glass Fill (G); Amalgomer CR (A); Dyract XP (D); Fuji IX GP (F) and 21 specimens were prepared from each material. Each group was divided into three subgroups according to the polishing system: Mylar (control) (C), Sof-lex (S), and Enhance-Pogo (EP)...
June 15, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28611845/novel-nanotechnology-of-tio2-improves-physical-chemical-and-biological-properties-of-glass-ionomer-cement
#7
Daniela Dellosso Cibim, Miki Taketomi Saito, Priscila Alves Giovani, Ana Flávia Sanches Borges, Vanessa Gallego Arias Pecorari, Orisson Ponce Gomes, Paulo Noronha Lisboa-Filho, Francisco Humberto Nociti-Junior, Regina Maria Puppin-Rontani, Kamila Rosamilia Kantovitz
The aim of this study was to assess the performance of glass ionomer cement (GIC) added with TiO2 nanotubes. TiO2 nanotubes [3%, 5%, and 7% (w/w)] were incorporated into GIC's (Ketac Molar EasyMix™) powder component, whereas unblended powder was used as control. Physical-chemical-biological analysis included energy dispersive spectroscopy (EDS), surface roughness (SR), Knoop hardness (SH), fluoride-releasing analysis, cytotoxicity, cell morphology, and extracellular matrix (ECM) composition. Parametric or nonparametric ANOVA were used for statistical comparisons (α ≤ 0...
2017: International Journal of Biomaterials
https://www.readbyqxmd.com/read/28609494/effect-of-three-clinical-curing-treatments-on-fluoride-release-and-surface-hardness-of-glass-ionomer-cements
#8
Dimitrios Dionysopoulos, Kosmas Tolidis, Paris Gerasimou, Thrasyvoulos Sfeikos
The purpose of this study was to investigate the effect of radiant heat, ultrasonic treatment, and 42.7 wt% CaCl₂ solution on fluoride release and surface hardness in three conventional glass-ionomer cements (GICs). The fluoride release patterns of each GIC were evaluated during a 28-day period using a fluoride ion-selective electrode. The surface hardness of the tested GICs was evaluated 24 hours after preparation of the specimens using Vickers hardness test. Statistical analysis of the data was made using analysis of variance and Bonferroni post hoc test (α = ...
July 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28598530/the-effect-of-temporary-cement-cleaning-methods-on-the-retention-of-crowns
#9
Mi-Young Song, Hongseok An, Eun-Jin Park
PURPOSE: To evaluate the effect of temporary cement cleaning methods on the retention of cemented crowns using zinc phosphate cement and resin-modified glass ionomer cement. MATERIALS AND METHODS: Forty titanium specimens were fabricated to simulate prepared molars with minimally retentive taper. The Ni-Cr cast crowns were fabricated, temporarily cemented, and separated. The specimens were divided into four groups according to the temporary cement cleaning method (n = 10) as follows: control group (no temporary cementation), orange solvent group, ultrasonic cleaning group, and air-abrasion group...
June 9, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28598190/paediatric-laser-dentistry-part-2-hard-tissue-laser-applications
#10
G Olivi, C Caprioglio, M Olivi, M D Genovese
Erbium lasers can provide effective and minimally invasive caries removal in children. The bonding phase remains a critic step as well as the choice of material. Glass ionomers exhibits lower bonding properties in laser irradiated teeth compared to the conventional method or to composite and resin modified glass ionomer. Laser can also provide effective decontamination and coagulation effects in vital and non vital pulp therapy of primary teeth, improving and simplifying the cleaning and disinfecting steps.
June 2017: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28580462/does-tack-curing-luting-cements-affect-the-final-cure
#11
Daniel Stegall, Daranee Tantbirojn, Jorge Perdigão, Antheunis Versluis
PURPOSE: Short initial light curing or "tack curing" is used to create a semi-gel state in luting cements for easier excess material cleanup. The effect of tack curing on the final cure of luting cements was measured in terms of hardness. MATERIALS AND METHODS: Three cement types were tested: two dual-curing composite cements (RelyX Unicem 2; Maxcem Elite); three light-curing veneer cements (Choice 2; Variolink Esthetic LC; RelyX Veneer); and two self-curing resin-modified glass-ionomer (RMGI) luting cements (RelyX Luting Plus; Nexus RMGI)...
June 2, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28571275/in-vitro-cytotoxicity-evaluation-of-novel-nano-hydroxyapatite-silica-incorporated-glass-ionomer-cement
#12
Tahir Yusuf Noorani, Norhayati Luddin, Ismail Ab Rahman, Saman Malik Masudi
INTRODUCTION: Glass Ionomer Cements (GIC) are among the most popular restorative materials, but their use in dentistry is limited due to their physical properties. The hardness of GIC was improved by incorporation of nano-hydroxyapatite-silica into GIC, to expand its applicability. AIM: To evaluate the cytotoxic effects of nano-hydroxyapatite-silica incorporated glass ionomer cement (HA-SiO2-GIC) on human Dental Pulp Stem Cells (DPSC) and compare it with conventional GIC and resin modified GIC...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28571260/anxiety-levels-among-five-year-old-children-undergoing-art-restoration-a-cross-sectional-study
#13
Ishan, K K Shivlingesh, Vartika Agarwal, Bhuvan Deep Gupta, Richa Anand, Abhinav Sharma, Sumedha Kushwaha, Khateeb Khan
INTRODUCTION: Atraumatic Restorative Treatment (ART) involves manually excavating the carious part of the tooth and restoring the prepared cavity with chemically adhesive restorative material [Glass Ionomer Cement (GIC)] and it may induce and/or impact the dental anxiety in children. It is well established that ART procedure is less anxiety producing when compared with other restorative procedures using dental drill. AIM: The aim of this study was to evaluate the anxiety levels among five-year-old children undergoing ART restoration in I...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28566878/consequences-of-facial-hemangioma-with-regard-to-dental-treatment
#14
Gabriela Cristina Santin, Késsia Suênia Fidelis de Mesquita Guimarães, Sara Silva de Oliveira, Raquel Assed Bezerra da Silva, Paulo Nelson-Filho, Regina Guenka Palma-Dibb, Alexandra Mussolino de Queiroz
Hemangioma is a benign vascular tumor that affects 3%-10% of the population and usually does not require specific treatment due to spontaneous regression. The purpose of this paper is to present a case report of a child having been born prematurely and diagnosed with hemangioma in the head and neck, emphasizing the dentofacial changes and treatment used to provide care. Severe fibrous scars were found in the perioral region and below the ear that limited the patient's ability to open her mouth. The child exhibited anterior open bite as well as dental caries in the lower jaw, hypomineralization, and enamel hypoplasia...
January 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/28547182/three-year-survival-of-art-high-viscosity-glass-ionomer-and-resin-composite-restorations-in-people-with-disability
#15
Gustavo F Molina, Denise Faulks, Ignacio Mazzola, Ricardo J Cabral, Jan Mulder, Jo E Frencken
OBJECTIVES: To assess the 3-year cumulative survival rate of atraumatic restorative treatment (ART) and conventional resin composite restorations (CRT) placed in persons with disability. MATERIALS AND METHODS: Patients referred for restorative care to the Haemophilia Foundation special care service were treated by one of two specialists. Patients and/or caregivers were provided with written and verbal information regarding treatment options and selected the alternative they preferred...
May 25, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28536026/nanochitosan-modified-glass-ionomer-cement-with-enhanced-mechanical-properties-and-fluoride-release
#16
R Senthil Kumar, N Ravikumar, S Kavitha, S Mahalaxmi, R Jayasree, T S Sampath Kumar, M Haneesh
Conventional glass-ionomer cements (GIC) are one of the most prevalent dental restorative materials, but their use is limited by their relatively low mechanical strength. Efforts have been made to improve the mechanical properties by addition of various fillers of which nano-sized particles appears to be a promising strategy. In the current study, effect of addition of nanochitosan particles in GIC (NCH-GIC) on compressive strength, flexural strength, wear resistance and fluoride release has been evaluated and compared with conventional GIC (C-GIC)...
May 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28535954/sol-gel-derived-bioactive-glass-nanoparticle-incorporated-glass-ionomer-cement-with-or-without-chitosan-for-enhanced-mechanical-and-biomineralization-properties
#17
Dong-Ae Kim, Jung-Hwan Lee, Soo-Kyung Jun, Hae-Won Kim, Mohamed Eltohamy, Hae-Hyoung Lee
OBJECTIVE: This study investigated the mechanical and in vitro biological properties (in immortalized human dental pulp stem cells (ihDPSCs)) of bioactive glass nanoparticle (BGN)-incorporated glass ionomer cement (GIC) with or without chitosan as a binder. METHODS: After the BGNs were synthesized and characterized, three experimental GICs and a control (conventional GIC) that differed in the additive incorporated into a commercial GIC liquid (Hy-bond, Shofu, Japan) were produced: BG5 (5wt% of BGNs), CL0...
May 20, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28527851/intentional-replantation-of-an-avulsed-immature-permanent-incisor-a-case-report
#18
Claudio Maniglia-Ferreira, Fabio de Almeida Gomes, Marcelo de Morais Vitoriano
This case report discusses the successful endodontic treatment of an open apex maxillary right permanent central incisor that had been avulsed and incorrectly replanted in a 7-year-old patient. The tooth was carefully re-extracted followed by cleaning of the alveolar socket and immediate replantation. However, pulp necrosis was diagnosed, and regenerative endodontic treatment was performed. The root canal system was disinfected by passive ultrasonic irrigation with 2.5% sodium hypochlorite. At the first visit, the tooth was repositioned and immobilized with an appropriate semirigid splint...
May 17, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28513786/3-year-survival-rates-of-retained-composite-resin-and-art-sealants-using-two-assessment-criteria
#19
RANDOMIZED CONTROLLED TRIAL
Leandro Augusto Hilgert, Soraya Coelho Leal, Gabriela Mesquita Lopes Freire, Jan Mulder, Jo E Frencken
The aim was to test the null-hypothesis that there is no difference in the cumulative survival rate of retained composite resin (CR) sealants and a high-viscosity glass-ionomer Atraumatic Restorative Treatment (ART) sealant in first permanent molars calculated according to the traditional and the modified retention assessment criteria over a period of 3 years. This cluster-randomized controlled clinical trial consisted of 123 schoolchildren, 6-7-years-old. At baseline, high-caries risk pits and fissures of fully erupted first permanent molars were treated with CR and ART sealants...
May 4, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28511515/comparative-evaluation-of-antibacterial-and-adhesive-properties-of-chitosan-modified-glass-ionomer-cement-and-conventional-glass-ionomer-cement-an-in-vitro-study
#20
Arpan Debnath, Srivastava Bagepalli Kesavappa, Gyanendra Pratap Singh, Shruthi Eshwar, Vipin Jain, Madhuniranjan Swamy, Punith Shetty
INTRODUCTION: Recent studies have reported the incorporation of modifiers with conventional Glass Ionomer Cement (GIC) to enhance its antibacterial effect. One such modification being the addition of Chitosan (CH). However, these modifiers might affect the physical properties of the restorations. AIM: The aim of the present study was to investigate the effect of modifying the liquid phase of conventional GIC with 10% v/v CH on the antibacterial properties and adhesion to enamel in comparison to conventional GIC...
March 2017: Journal of Clinical and Diagnostic Research: JCDR
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