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glass ionomer

Massimo Del Fabbro, Stefano Corbella, Patrick Sequeira-Byron, Igor Tsesis, Eyal Rosen, Alessandra Lolato, Silvio Taschieri
BACKGROUND: When primary root canal therapy fails, periapical lesions can be retreated with or without surgery. Root canal retreatment is a non-surgical procedure that involves removal of root canal filling materials from the tooth, followed by cleaning, shaping and obturating of the canals. Root-end resection is a surgical procedure that involves exposure of the periapical lesion through an osteotomy, surgical removal of the lesion, removal of part of the root-end tip, disinfection and, commonly, retrograde sealing or filling of the apical portion of the remaining root canal...
October 19, 2016: Cochrane Database of Systematic Reviews
K Tolidis, C Boutsiouki, P Gerasimou
AIM: Carbomer cement represents a novel glass-ionomer which gradually mineralises into fluoroapatite. Purpose of this study was to evaluate microleakage around restorations in deciduous teeth made with composite resin, conventional glass-ionomer cement, resin-modified glass-ionomer cement and carbomer/fluoroapatite-enhanced glass-ionomer cement. MATERIALS AND METHODS: A group of 40 primary upper canines, primary upper and lower molars was divided into 4 groups (n=10)...
September 2016: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
S Bektas Donmez, S Uysal, A Dolgun, M D Turgut
AIM: The purpose of this study is to evaluate the clinical performance of three different restorative materials in primary teeth according to the FDI criteria. MATERIALS AND METHODS: Resin-modified glass ionomer cement, compomer and composite resin restorations (n=93) were made in 31 patients. The restorations were clinically evaluated at baseline, 6th, 12th and 18th month with the FDI criteria. RESULTS: The cumulative survival rate after 18 months was found to be 90...
September 2016: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
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
Veerasamy Yengopal, Soraya Yasin Harnekar, Naren Patel, Nandi Siegfried
BACKGROUND: Childhood caries (tooth decay) consists of a form of tooth decay that affects the milk teeth (also known as baby or primary teeth) of children. This may range from tooth decay in a single tooth to rampant caries affecting all the teeth in the mouth. Primary teeth in young children are vital to their development and every effort should be made to retain these teeth for as long as is possible. Dental fillings or restorations have been used as an intervention to repair these damaged teeth...
October 17, 2016: Cochrane Database of Systematic Reviews
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
D Sundfeld, L S Machado, L M Franco, F M Salomão, Nip Pini, Mlmm Sundefeld, C S Pfeifer, R H Sundfeld
Pit and fissure sealant is a clinical technique adopted to prevent caries lesion development. Ionomeric and/or resin-based materials are commonly used for this purpose. This article presents a case series of sealed teeth with 22-year follow-up evaluated by clinical, photographic, and microscopic analysis. In 1992, sixteen patients (9-14 years of age) had at least three teeth sealed with one of the following materials: resin-modified glass ionomer cement (RMGIC, Vitrebond or Fuji II LC) or polyacid-modified resin composite (PMRC, VariGlass VLC), totaling 86 sealed permanent teeth...
October 10, 2016: Operative Dentistry
Muhamad S Musa, Amir H Milani, Peter Shaw, Gareth Simpson, Peter A Lovell, Elizabeth Eaves, Nigel Hodson, Brian R Saunders
In this study we investigate the structure-mechanical property relationships for nanostructured ionomer films containing ionically crosslinked core-shell polymer nanoparticles based on poly(n-butyl acrylate) (PBA). Whilst nanostructured ionomer films of core-shell nanoparticles have been previously shown to have good ductility [Soft Matter, 2014, 10, 4725], the modulus values were modest. Here, we used BA as the primary monomer to construct core-shell nanoparticles that provided films containing nanostructured polymers with much higher glass transition temperature (Tg) values...
October 4, 2016: Soft Matter
Ahmed Omran, Fatthi Abdel Baki, Ahmed Amin
OBJECTIVE: To assess the effectiveness of glass ionomer bone cement (GIBC) in lateral attic wall reconstruction after primary acquired attic cholesteatoma surgery. MATERIALS AND METHODS: This prospective study was conducted on twenty children collected from the ENT outpatient clinics of a secondary and tertiary hospital. All patients presented with chronic suppurative otitis media with cholesteatoma of the primary acquired attic type. All patients underwent intact canal wall mastoidectomy (ICWM) with a transcanal atticotomy to address primary cholesteatoma involving the attic and the supratubal recess...
August 2016: Journal of International Advanced Otology
Song Chen, Satwik Gururaj, Wei Xia, Håkan Engqvist
Developing dental restorations with enhanced antibacterial properties has been a constant quest for materials scientists. The aim of this study was to synthesize silver doped calcium phosphate particles and use them to improve antibacterial properties of conventional glass ionomer cement. The Ag doped monetite (Ag-DCPA) and hydroxyapatite (Ag-HA) were synthesized by precipitation method and characterized using X-ray diffraction, scanning electron microscope and X-ray fluorescence spectroscopy. The antibacterial properties of the cements aged for 1 day and 7 days were evaluated by direct contact measurement using staphylococcus epidermis Xen 43...
November 2016: Journal of Materials Science. Materials in Medicine
Karim Elhennawy, Falk Schwendicke
OBJECTIVES: We systematically reviewed treatment modalities for MIH-affected molars and incisors. DATA: Trials on humans with ≥1 MIH molar/incisor reporting on various treatments were included. Two authors independently searched and extracted records. Sample-size-weighted annual failure rates were estimated where appropriate. The risk of bias was assessed using the Newcastle-Ottawa scale. SOURCES: Electronic databases (PubMed, Embase, Cochrane CENTRAL, Google Scholar) were screened, and hand searches and cross-referencing performed...
September 28, 2016: Journal of Dentistry
M Metz, M Durski, J Chou, G Crim, B Harris, W-S Lin
OBJECTIVE: For some esthetic clinical situations, it is necessary to finish crown margins on direct restorative materials to preserve tissue integrity, bonding integrity, and biological width. The purpose of this research was to investigate microleakage at the interface between bonded lithium disilicate crowns and various direct restorative materials in a class III and class V position. METHODS AND MATERIALS: Class III or class V restorations were prepared on one side of extracted incisors with either Tetric EvoCeram, Tetric Evoceram Bulk, Fuji II LC, or Tetric Evoflow...
September 2016: Operative Dentistry
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
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
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...
September 29, 2016: Dental Materials Journal
N C T Marques, N Lourenço Neto, T M Oliveira
BACKGROUND: Furcal perforation consists of a communication between the pulp cavity and the periodontal tissues that can occur accidentally during cavity preparation or root canal instrumentation. This complication may lead to inflammatory reactions and compromise adjacent tissues irreversibly, resulting in the early loss of primary teeth. Perforation sealing with a biocompatible material is necessary to ensure a favourable prognosis. Among different materials, MTA has been employed due to its excellent healing and physical properties...
September 26, 2016: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
Jason R Garner, Michael N Wajdowicz, Nicholas B DuVall, Howard W Roberts
STATEMENT OF PROBLEM: Two resin-modified glass-ionomer (RMGI)-based luting agents have been recently marketed without independent reports of their physical properties. PURPOSE: The purpose of this in vitro study was to evaluate selected physical properties of 2 newly marketed RMGI luting agents and compare the findings with traditional materials. MATERIAL AND METHODS: Specimens (N=12) of Nexus RMGI, UltraCem, GC Fuji Cem 2, and RelyX Luting Plus were fabricated using standardized molds for flexural strength and fracture toughness according to manufacturer recommendations and stored in physiologic phosphate-buffered saline solution at 37°C until testing...
September 22, 2016: Journal of Prosthetic Dentistry
Ann S Goldman, Xi Chen, Mingwen Fan, Jo E Frencken
This study, conducted from a government program perspective, compared the incremental cost-effectiveness of oral health interventions, in particular their delivery to underserved populations in whom dental sealants constitute an important, high-yielding complement to toothbrushing in dental-caries prevention. The study data concern the relative cost-effectiveness of three sealant materials in four approaches to prevent cavitated dentine carious lesions in permanent molars in a community intervention trial among school-age children in Wuhan, China...
October 2016: European Journal of Oral Sciences
Xingyu Chen, Fangfang Chen, Erlendur Jónsson, Maria Forsyth
The poly(N1222)xLi1-x[AMPS] ionomer system with dual cations has previously shown decoupled Li ion dynamics from polymer segmental motions, characterized by the glass transition temperature, which can result in a conductive electrolyte material whilst retaining an appropriate modulus (ie. stiffness) so that it can suppress dendrite formation, thereby improving safety when used in lithium metal batteries. To understand this ion dynamics behavior, molecular dynamics techniques have been used in this work to simulate structure and dynamics in these materials...
September 23, 2016: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
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
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