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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/27894521/effect-of-3-cements-on-white-spot-lesion-formation-after-full-coverage-rapid-maxillary-expander-a-comparative-in-vivo-study
#2
Ahmet Yagci, Yasemin Nur Korkmaz, Filiz Yagci, Aykan Onur Atilla, Suleyman Kutalmiş Buyuk
INTRODUCTION: The aim of this study was to assess the effects of 3 luting agents (glass ionomer cement, compomer, and polycarboxylate cement) on white spot lesion formation in patients with full-coverage bonded acrylic splint expanders. White spot lesion formation was assessed with quantitative light-induced fluorescence. METHODS: Full-coverage rapid maxillary expanders were cemented with glass ionomer cement, compomer, and polycarboxylate cement in groups 1, 2, and 3, respectively...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27891629/capping-carious-exposures-in-adults-a-randomized-controlled-trial-investigating-mineral-trioxide-aggregate-versus-calcium-hydroxide
#3
R Kundzina, L Stangvaltaite, H M Eriksen, E Kerosuo
AIM: The aim of this multicentre, parallel-group randomized clinical trial was to compare the effectiveness of mineral trioxide aggregate (MTA) and a conventional calcium hydroxide liner (CH) as direct pulp capping materials in adult molars with carious pulpal exposure. METHODOLOGY: Seventy adults aged 18-55 years were randomly allocated to two parallel arms: MTA (White ProRoot, Dentsply, Tulsa Dental, Tulsa, OK, USA; n = 33) and CH (Dycal(®) , Dentsply DeTrey GmbH, Konstanz, Germany; n = 37)...
November 7, 2016: International Endodontic Journal
https://www.readbyqxmd.com/read/27881331/in%C3%A2-vitro-assessment-of-retention-and-resistance-failure-loads-of-two-preparation-designs-for-maxillary-anterior-teeth
#4
Aimilia Bintivanou, Argirios Pissiotis, Konstantinos Michalakis
STATEMENT OF PROBLEM: Parallel labiolingual walls and the preservation of the cingulum in anterior tooth preparations have been advocated. However, their contribution to retention and resistance form has not been evaluated. PURPOSE: The purpose of this in vitro study was to evaluate the retention and resistance failure loads of 2 preparation designs for maxillary anterior teeth. MATERIAL AND METHODS: Forty metal restorations were fabricated and paired with 40 cobalt-chromium prepared tooth analogs...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27881309/survey-of-dentists-to-determine-contemporary-use-of-endodontic-posts
#5
Sumitha N Ahmed, Terry E Donovan, Taneet Ghuman
STATEMENT OF PROBLEM: Although the scientific literature provides sound decision-making tools for the restoration of endodontically treated teeth, dentists have different opinions on the rationale for the use of endodontic posts (dowels) and selection of post systems. The decision to place a post is at times contrary to the literature. Updated information on the treatment of endodontically treated teeth among general dentists is lacking. PURPOSE: The purpose of this survey was to gain insight into the rationale for choice of endodontic posts and the different endodontic post systems currently used by dental practitioners...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27864970/color-stability-of-dental-restorative-materials-submitted-to-heat-sources-for-forensic-purposes
#6
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
#7
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
#8
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/27847746/elemental-analysis-of-caries-affected-root-dentin-and-artificially-demineralized-dentin
#9
Young-Hye Sung, Ho-Hyun Son, Keewook Yi, Juhea Chang
OBJECTIVES: This study aimed to analyze the mineral composition of naturally- and artificially-produced caries-affected root dentin and to determine the elemental incorporation of resin-modified glass ionomer (RMGI) into the demineralized dentin. MATERIALS AND METHODS: Box-formed cavities were prepared on buccal and lingual root surfaces of sound human premolars (n = 15). One cavity was exposed to a microbial caries model using a strain of Streptococcus mutans. The other cavity was subjected to a chemical model under pH cycling...
November 2016: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/27843251/sealing-ability-of-nano-ionomer-in-primary-teeth-an-ex-vivo-study
#10
REVIEW
Fawaz Siddiqui, Swati Karkare
INTRODUCTION: Microleakage is an important consideration in primary dentition because the floor of the cavity preparation may be close to the pulp. The added insult to the pulp caused by seepage of irritants around the restoration and through the thin dentin may produce irreversible pulp damage. AIM: The objective of this study was to evaluate and compare the sealing ability of three light cured (LC) resin-modified glass-ionomer cements (RMGICs) in primary anterior teeth...
July 2016: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/27843249/in-vitro-evaluation-of-stainless-steel-crowns-cemented-with-resin-modified-glass-ionomer-and-two-new-self-adhesive-resin-cements
#11
REVIEW
Sidhant Pathak, K K Shashibhushan, P Poornima, Vv Subba Reddy
AIMS: To assess and compare the retentive strength of two dual-polymerized self-adhesive resin cements (RelyX U200, 3M ESPE & SmartCem2, Dentsply Caulk) and a resin-modified glass ionomer cement (RMGIC; RelyX Luting 2, 3M ESPE) on stainless steel crown (SSC). MATERIALS AND METHODS: Thirty extracted teeth were mounted on cold cured acrylic resin blocks exposing the crown till the cemento-enamel junction. Pretrimmed, precontoured SSC was selected for a particular tooth...
July 2016: International Journal of Clinical Pediatric Dentistry
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
#12
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
#13
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/27829765/comparative-study-on-the-tensile-bond-strength-and-marginal-fit-of-complete-veneer-cast-metal-crowns-using-various-luting-agents-an-in-vitro-study
#14
B Devi Parameswari, M Rajakumar, G Lambodaran, Shyam Sundar
INTRODUCTION: Several commercially available luting agents are used to cement the dental restorations such as intra-coronal, extra-coronal, and fixed partial dentures. Tensile bond strength (TBS) and accurate marginal fit are the essential factors to determine the good clinical results in fixed prosthesis. The retentivity of the luting cements is assessed by their adhesive capacity over the tooth surface and metal surface. Generally, the adhesive ability has been evaluated with in vitro testing, with tensile bond tests...
October 2016: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/27822468/retention-strength-after-compressive-cyclic-loading-of-five-luting-agents-used-in-implant-supported-prostheses
#15
Angel Alvarez-Arenal, Ignacio Gonzalez-Gonzalez, Hector deLlanos-Lanchares, Aritza Brizuela-Velasco, Javier Pinés-Hueso, Joseba Ellakuria-Echebarria
The purpose of this study was to evaluate and compare the retention strength of five cement types commonly used in implant-retained fixed partial dentures, before and after compressive cyclic loading. In five solid abutments screwed to 5 implant analogs, 50 metal Cr-Ni alloy copings were cemented with five luting agents: resin-modified glass ionomer (RmGI), resin composite (RC), glass ionomer (GI), resin urethane-based (RUB), and compomer cement (CC). Two tensile tests were conducted with a universal testing machine, one after the first luting of the copings and the other after 100,000 cycles of 100 N loading at 0...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27805887/successful-restoration-of-severely-mutilated-primary-incisors-using-a-novel-method-to-retain-zirconia-crowns-two-year-results
#16
Osama Ibrahim El Shahawy, Anne C O'Connell
AIM: This manuscript describes a simple reliable technique for restoring severely mutilated primary anterior teeth. A rigid glass ionomer post is created over which zirconia crowns can be fitted to achieve a long-term stable esthetic restoration for primary anterior teeth. STUDY DESIGN: Children aged 2-5 years with two up to six extensively decayed upper primary incisors were included. Fuji IX was condensed into an intracanal space created to a depth of 3mm, to provide a core which also extended 3mm supragingivally...
2016: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/27794149/microleakage-of-glass-ionomer-based-provisional-cement-in-cad-cam-fabricated-interim-crowns-an-in-vitro-study
#17
Ra'fat I Farah, Naji Al-Harethi
AIM: The aim of this study was to compare in vitro the marginal microleakage of glass ionomer-based provisional cement with resin-based provisional cement and zinc oxide non-eugenol (ZONE) provisional cement in computer-aided design and computer-aided manufacturing (CAD/CAM)-fabricated interim restorations. MATERIALS AND METHODS: Fifteen intact human premolars were prepared in a standardized manner for complete coverage of crown restorations. Interim crowns for the prepared teeth were then fabricated using CAD/CAM, and the specimens were randomized into three groups of provisional cementing agents (n = 5 each): Glass ionomer-based provisional cement (GC Fuji TEMP LT™), bisphenol-A-glycidyldimethacrylate (Bis-GMA)/ triethylene glycol dimethacrylate (TEGDMA) resin-based cement (UltraTemp® REZ), and ZONE cement (TempBond NE)...
October 1, 2016: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/27790251/discoloration-potential-of-endodontic-sealers-a-brief-review
#18
REVIEW
Sohrab Tour Savadkouhi, Mahta Fazlyab
: Tooth discoloration induced by endodontic sealers, is a common finding that impairs aesthetic outcome of endodontic treatment. The aim of the present mini literature review, was to summarize the existing data on discoloration potential of different endodontic sealers. The research covered the article published in PubMed and Google Scholar from 2000 to 2015. The searched keywords included 'tooth discoloration AND endodontic', 'tooth discoloration AND sealer, 'tooth discoloration AND zinc-oxide eugenol sealer', 'tooth discoloration AND Calcium Hydroxide Sealer', 'tooth discoloration AND Glass Ionomer Sealer', 'tooth discoloration AND epoxy-resin Sealer', 'tooth discoloration AND Silicon Based Sealer', 'tooth discoloration AND Bioceramic Sealer' and 'Spectrophotometry'...
2016: Iranian Endodontic Journal
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
#19
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/27779317/adhesives-for-fixed-orthodontic-bands
#20
REVIEW
Declan T Millett, Anne-Marie Glenny, Rye Cr Mattick, Joy Hickman, Nicky A Mandall
BACKGROUND: Orthodontic treatment involves using fixed or removable appliances (dental braces) to correct the positions of teeth. It has been shown that the quality of treatment result obtained with fixed appliances is much better than with removable appliances. Fixed appliances are, therefore, favoured by most orthodontists for treatment. The success of a fixed orthodontic appliance depends on the metal attachments (brackets and bands) being attached securely to the teeth so that they do not become loose during treatment...
October 25, 2016: Cochrane Database of Systematic Reviews
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