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https://www.readbyqxmd.com/read/27914669/effect-of-different-thermo-light-polymerization-on-flexural-strength-of-two-glass-ionomer-cements-and-a-glass-carbomer%C3%A2-cement
#1
Kristina Gorseta, Ali Borzabadi-Farahani, Alireza Moshaverinia, Domagoj Glavina, Edward Lynch
STATEMENT OF PROBLEM: Whether polymerization lights can be used for heating glass ionomer cements (GICs) or glass carbomer (GCP) to improve their mechanical properties is not well established. PURPOSE: The purpose of this in vitro study was to assess the effect of thermo-light polymerization on the flexural strength (FS) of 2 GICs (Fuji IX GP Fast, Ketac Molar) and a GCP. MATERIAL AND METHODS: Specimens (n=10) were prepared in stainless steel molds (2×2×25 mm), compressed, exposed to 3 polymerization lights (500, 1000, 1200 mW/cm(2)) for 2 cycles of 40 seconds on each side, and stored in petroleum jelly (37°C, 24 hours)...
November 30, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27864970/color-stability-of-dental-restorative-materials-submitted-to-heat-sources-for-forensic-purposes
#2
Roberto Cesar Biancalana, Sergio Augusto de Freitas Vicente, Ricardo Henrique Alves da Silva, Fernanda de Carvalho Panzeri Pires-de-Souza
During postmortem examination of the dental arches of carbonized victims, dental restorative materials may be found. The aim of this study was to evaluate the effect of heat source action on the color stability of composite resin (CR) and glass ionomer cement (GIC) restorations, to discriminate between them and compare with antemortem dental data. Sixty bovine teeth (30 CR and 30 GIC) were prepared (6 × 6 × 2 mm) and separated into groups (n = 10). The color readouts were taken by spectrophotometer, before and after heat action (100°C, 200°C, 300°C), in an oven for 15 min...
November 16, 2016: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/27859981/influence-of-acceleration-setting-reaction-by-halogen-light-curing-on-gic-dentin-interface-qualitative-analysis-by-sem
#3
Laysa Yoshioka, Tamara Kerber Tedesco, Ana Flávia Bissoto Calvo, Sabrina Sun Ha Kim, Anna Paula Vieira Ferreira Prado Malagrana, Daniela Prócida Raggio
The aim of this study was to evaluate by scanning electron microscope (SEM) photomicrographs the influence of application of halogen light-curing for fastening the set reaction of high-viscosity glass ionomer cements (GIC) by assessing the material/dentin interface. Twelve human primary canines were assigned in four groups (n = 3) according to the GIC (Fuji IX, GC or Maxxion R, FGM) and application of halogen light-curing (60 sec or control-no external energy). Blocks with approximately 6 mm of height were buildup on previously pre-treated dentin surface in according to the experimental group...
November 17, 2016: Microscopy Research and Technique
https://www.readbyqxmd.com/read/27847749/comparative-assessment-of-antibacterial-activity-of-different-glass-ionomer-cements-on-cariogenic-bacteria
#4
Rahul Gaybarao Naik, Arun Suresh Dodamani, Mahesh Ravindra Khairnar, Harish Chaitram Jadhav, Manjiri Abhay Deshmukh
OBJECTIVES: Glass ionomer cements (GICs), which are biocompatible and adhesive to the tooth surface, are widely used nowadays for tooth restoration. They inhibit the demineralization and promote the remineralization of the tooth structure adjacent to the restoration, as well as interfere with bacterial growth. Hence, the present study was conducted to assess and compare the antimicrobial activity of three commercially available GICs against two cariogenic bacteria. MATERIALS AND METHODS: An agar plate diffusion test was used for evaluating the antimicrobial effect of three different GICs (Fuji IX, Ketac Molar, and d-tech) on Streptococcus mutans (S...
November 2016: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/27843248/comparative-evaluation-of-shear-bond-strength-of-various-glass-ionomer-cements-to-dentin-of-primary-teeth-an-in-vitro-study
#5
REVIEW
Rani Somani, Shipra Jaidka, Deepti J Singh, Gurleen K Sibal
AIM: To evaluate and compare shear bond strength of various glass ionomer cements (GICs) to dentin of primary teeth. MATERIALS AND METHODS: Sample size taken for the study was 72 deciduous molars with intact buccal or lingual surfaces. Samples were randomly divided into three groups, i.e., groups A, B, and C and were restored with conventional type II GIC, type II light cure (LC) GIC, and type IX GIC respectively. Thermocycling was done to simulate oral conditions...
July 2016: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/27836115/hollow-glass-fibers-in-reinforcing-glass-ionomer-cements
#6
Sufyan Garoushi, Pekka Vallittu, Lippo Lassila
OBJECTIVE: This study investigated the reinforcing effect of hollow and solid discontinuous glass fiber fillers with two different loading fractions on select mechanical properties of conventional and resin modified glass ionomer cements (GICs). METHODS: Experimental fiber reinforced GIC was prepared by adding discontinuous glass fiber (hollow/solid) of 0.5mm in length to the powder of commercial GICs (GC Fuji IX and II LC) with two different weight ratios (5 and 10wt%) using a high speed mixing machine...
November 8, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27798009/applied-investigation-of-person-specific-and-context-specific-factors-on-postoperative-recovery-and-clinical-outcomes-of-patients-undergoing-gastrointestinal-cancer-surgery-multicentre-european-study
#7
Sheraz R Markar, Stella Mavroveli, Konstantinos V Petrides, Marco Scarpa, Veronique Christophe, Carlo Castoro, Christophe Mariette, Pernilla Lagergren, George B Hanna
INTRODUCTION: Cancer treatments have greatly advanced over the past two decades causing survival improvements and reduced complications from cancer surgery. However, the cancer diagnosis and the effects of treatment modalities pose a major risk to patients' psychological well-being. Given current interest and emerging evidence about the importance of psychological and social factors on cancer survival and coping with cancer treatments, this study will build and expand research in order to identify key modifiable psychosocial variables that contribute to better physical and mental health following gastrointestinal cancer (GIC) surgery...
October 24, 2016: BMJ Open
https://www.readbyqxmd.com/read/27789794/exploring-the-unexpected-influence-of-the-si-ge-ratio-on-the-molecular-architecture-and-mechanical-properties-of-al-free-gics
#8
Brett Dickey, Richard Price, Daniel Boyd
Germanium (Ge)-based glass ionomer cements have demonstrated the ability to balance strength with extended setting times, a unique set of characteristics for aluminum-free glass ionomer cements. However, the mechanical properties of current Ge-based glass ionomer cements significantly deteriorate over time, which jeopardizes their clinical potential. This work explores the effect of incrementally decreasing the Si:Ge ratio in the glass phase of zinc-silicate glass ionomer cements to identify potential mechanisms responsible for the time-induced mechanical instability of Ge-based glass ionomer cements...
November 2016: Journal of Biomaterials Applications
https://www.readbyqxmd.com/read/27769677/bond-strength-of-self-adhesive-resin-cement-to-different-root-perforation-materials
#9
Stephanie Lemos Martins Sicuro, Marilisa Carneiro Leão Gabardo, Carla Castiglia Gonzaga, Nathaly Dias Morais, Flares Baratto-Filho, Gisele Maria Correr Nolasco, Denise Piotto Leonardi
INTRODUCTION: Different materials have been used for intervening in root perforations. These materials are often in contact with resin cements used for cementation of intraradicular retainers. The aim of this study was to evaluate the bond strength of self-adhesive resin cement to different materials used to treat root perforations (mineral trioxide aggregate [MTA], Portland cement [PORT], and glass ionomer cement [GIC]). METHODS: Four discs (10 × 1 mm) of each material (the MTA, PORT, and GIC groups) were embedded into polyvinyl chloride tubes using acrylic resin, ground, and polished until a flat surface was exposed...
October 18, 2016: Journal of Endodontics
https://www.readbyqxmd.com/read/27766712/effect-of-the-addition-of-chlorhexidine-and-miswak-extract-on-the-clinical-performance-and-antibacterial-properties-of-conventional-glass-ionomer-an-in-vivo-study
#10
Noha Samir Kabil, Amira Saad Badran, Mariem Osama Wassel
BACKGROUND: Antibacterial restorations can increase the success rate of minimum invasive dentistry especially in young permanent molars with deep carious lesions as an attempt to preserve maximum dental structure and avoid pulp exposure. Further research is warranted to evaluate different antibacterial agents. OBJECTIVES: This study aimed to evaluate the efficacy of adding chlorhexidine gluconate (CHX) or aqueous miswak (Salvadora persica) extract on the clinical performance and in vivo antibacterial activity of conventional anhydrous glass ionomer cement (GIC)...
October 21, 2016: International Journal of Paediatric Dentistry
https://www.readbyqxmd.com/read/27757445/systematic-review-on-highly-viscous-glass-ionomer-cement-resin-coating-restorations-part-i-%C3%A2-do-they-merge-minamata-convention-and-minimum-intervention-dentistry
#11
Andrej M Kielbassa, Georg Glockner, Michael Wolgin, Karl Glockner
BACKGROUND: With the Minamata Convention the use of mercury will be phased down, and this undoubtedly will have an effect on dental treatment regimens and economic resources. Composite resin restorations are considered viable alternatives to amalgam fillings; however, these will not be covered completely by health insurance systems in many countries. Recently, a high-viscosity glass-ionomer cement (hvGIC) processed with a resinous coating (RC) has been introduced, and has been marketed as a restorative material in load-bearing Class I cavities (and in Class II cavities with limited size), thus serving as a possible alternative to amalgam fillings...
2016: Quintessence International
https://www.readbyqxmd.com/read/27733091/intra-articular-onabotulinumtoxina-in-osteoarthritis-knee-pain-effect-on-human-mechanistic-pain-biomarkers-and-clinical-pain
#12
L Arendt-Nielsen, G-L Jiang, R DeGryse, C C Turkel
OBJECTIVES: OnabotulinumtoxinA (onabotA) attenuates peripheral nociceptive transduction and consequently neuronal firing. The aim of this mechanistic study was to evaluate the effect of intra-articular (IA) onabotA in patients with painful knee osteoarthritis (OA). METHOD: We conducted a double-blind, randomized, placebo-controlled, 12-week trial using a single ultrasound-guided IA injection of onabotA (200 U). Patients (N = 121) were randomized to receive onabotA (n = 61) or placebo (n = 60)...
October 13, 2016: Scandinavian Journal of Rheumatology
https://www.readbyqxmd.com/read/27725520/effects-of-incorporation-of-nano-fluorapatite-particles-on-microhardness-fluoride-releasing-properties-and-biocompatibility-of-a-conventional-glass-ionomer-cement-gic
#13
Maryam Moshaverinia, Ali Borzabadi-Farahani, Abdi Sameni, Alireza Moshaverinia, Sahar Ansari
Present study evaluated effects of addition of Nanoparticles fluorapatite (Nano-FA) on microhardness and fluoride release of a Glass Ionomer Cement (GIC, Fuji IX GP Fast). Forty-eight specimens prepared, divided equally into 4 groups (2 with Nano-FA); after 24 h and one week Vickers microhardness (HV) was measured. Nano-FA specimens were made from addition of nano-FA to Fuji IX powder (glass powder/Nano-FA ratio=20:1 wt/wt, 3.6:1 P/L ratio). At 24 h, mean (95% CI) HV for GIC and Nano-FA GIC were 40.59 (39.51-41...
2016: Dental Materials Journal
https://www.readbyqxmd.com/read/27702716/enteral-nutrition-preference-in-critical-care-fibre-enriched-or-fibre-free
#14
Hatice Yagmurdur, Figen Leblebici
BACKGROUND AND OBJECTIVES: This study's main aim was to observe the effects of a fibre-enriched nutrition solution on requisite feeding volume, which is directly proportional to energy intake in mechanically ventilated patients with enteral nutrition. METHODS AND STUDY DESIGN: Some 120 patients who required mechanical ventilation and enteral nutrition with a nasogastric tube were studied. Upon ICU admission, the patient's age, gender, weight, height, comorbidities, diagnosis and APACHE II score were recorded...
December 2016: Asia Pacific Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27688410/influence-of-adhesives-and-methods-of-enamel-pretreatment-on-the-shear-bond-strength-of-orthodontic-brackets
#15
Sanja Jurišić, Gordan Jurišić, Hrvoje Jurić
AIM: The objective of present study was to examine influence of adhesives and methods of enamel pretreatment on the shear bond strength (SBS) of orthodontic brackets. The adhesives used were resin-reinforced glass ionomer cements-GIC (Fuji Ortho LC) and composite resin (Transbond XT). MATERIAL AND METHODS: The experimental sample consisted of 80 extracted human first premolars. The sample was divided into four equal groups, and the metal brackets were bonded with different enamel pretreatments by using two adhesives: group A-10% polyacrylic acid; Fuji Ortho LC, group B-37% phosphoric acid; Fuji Ortho LC, group C-self etching primer; Transbond XT, group D-37% phosphoric acid, primer; Transbond XT...
December 2015: Acta Stomatologica Croatica
https://www.readbyqxmd.com/read/27686260/bioactivity-and-biocompatibility-of-two-fluoride-containing-bioactive-glasses-for-dental-applications
#16
T De Caluwé, C W J Vercruysse, H A Declercq, D Schaubroeck, R M H Verbeeck, L C Martens
OBJECTIVE: Bioactive glasses (BAG) form, in contrast to formerly used implant materials, a stable bond with tissues, especially bone, when implanted. Nowadays BAGs are often mixed with a cement/composite that hardens in situ to broaden its applications in dentistry or orthopedics. The bioactivity and biocompatibility of possible BAG candidates for BAG-cement/composite development were evaluated. METHODS: Two fluoride containing BAGs were tested: a Na(+)-containing (45S5F), based on the first commercial BAG, and a Na(+)-free BAG (CF9), with a higher Ca(2+) and PO4(3-) content...
November 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27681395/a-comparative-microleakage-evaluation-of-three-different-base-materials-in-class-i-cavity-in-deciduous-molars-in-sandwich-technique-using-dye-penetration-and-dentin-surface-interface-by-scanning-electron-microscope
#17
Babita Niranjan, Nandihalli Devendrappa Shashikiran, Shilpy Singla, Ruchi Thakur, Aashutosh Dubey, Satish Maran
INTRODUCTION: A major objective in restorative dentistry is the control of marginal leakage, which may occur because of dimensional changes or lack of adaptation of restorative material to the cavity preparation. Numerous techniques have been advocated to overcome polymerization shrinkage in composite restorations. AIM AND OBJECTIVES: This study investigated microleakage of three different bases under composite resin in sandwich technique using dye penetration and dentin surface interface using scanning electron microscope (SEM)...
October 2016: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/27680033/shear-bond-strength-of-a-novel-light-cured-calcium-silicate-based-cement-to-resin-composite-using-different-adhesive-systems
#18
Hanan Alzraikat, Nessrin A Taha, Deema Qasrawi, Michael F Burrow
The shear bond strength (SBS) of TheraCal LC to resin composite was evaluated in comparison to Mineral trioxide aggregate (ProRoot MTA) and conventional glass ionomer cement (GIC) using two adhesive systems. A hole was prepared in 90 acrylic blocks (6 mm diameter, 2 mm deep) then filled with TheraCal LC, MTA or Fuji IX (n=30/group). Each group was bonded with either an etch and rinse or 1-step self-etch adhesive. Filtek Z250 composite was bonded to each capping material. Bond strength was tested in a universal testing machine, and data were analyzed using 2-way ANOVA and Duncan's Multiple range test (p<0...
December 1, 2016: Dental Materials Journal
https://www.readbyqxmd.com/read/27659085/a-comparative-study-of-the-retentive-strengths-of-commercial-and-indigenously-developed-luting-cements-using-both-lathe-cut-and-clinically-simulated-specimens
#19
Joe Mathew, Byju P Kurian, Biju Philip, Sunil Mohammed, Preetha Menon, Rajan S Raj
INTRODUCTION: Superior adhesive strength in luting agents is of paramount significance in fixed partial denture success. In this in vitro study five cements were tested for retentive qualities, using both lathe-cut and hand-prepared specimens. MATERIALS AND METHODS: A total of 104 freshly extracted tooth specimens were prepared. Seventy of them were lathe-cut and 30 specimens were hand-prepared to simulate clinical conditions. Five different cements were tested, which included a compomer, a composite, a zinc phosphate, and 2 glass-ionomer luting cements...
2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27644442/chloroquine-an-autophagy-inhibitor-potentiates-the-radiosensitivity-of-glioma-initiating-cells-by-inhibiting-autophagy-and-activating-apoptosis
#20
Hongxing Ye, Mantao Chen, Fei Cao, Hongguang Huang, Renya Zhan, Xiujue Zheng
BACKGROUND: Glioblastoma is refractory to conventional treatment, which is combined of surgery, chemotherapy and radiotherapy. Recent studies have shown that glioma initiating cells (GICs) contribute to tumorigenesis and radioresistance. Recently, other studies showed that the GICs use the autophagy as the major pathway to survive. Chloroquine, an anti-malarial chemical, is an autophagic inhibitor which blocks autophagosome fusion with lysosome and slows down lysosomal acidification. The aim of this study was to explore the mechanisms of chloroquine on the radiosensitivity of GICs...
September 20, 2016: BMC Neurology
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