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https://www.readbyqxmd.com/read/28210444/effect-of-two-different-tooth-bleaching-techniques-on-microhardness-of-giomer
#1
Soodabeh Kimyai, Mahmoud Bahari, Fereshteh Naser-Alavi, Soodabeh Behboodi
BACKGROUND: Tooth bleaching is a safe and conservative treatment modality to improve the esthetic appearance of discolored teeth. One of the problems with the use of bleaching agents is their possible effect on surface microhardness of resin-based materials. The present study was carried out to evaluate the effect of in-office and at-home bleaching on surface microhardness of giomer. MATERIAL AND METHODS: Seventy-five disk-shaped giomer samples (Beautifil II) were prepared and cured with a light-curing unit...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28210436/effect-of-disinfecting-the-cavity-with-chlorhexidine-on-the-marginal-gaps-of-cl-v-giomer-restorations
#2
Soodabeh Kimyai, Fatemeh Pournaghi-Azar, Fereshteh Naser-Alavi, Ashkan Salari
BACKGROUND: Considering the effect of cavity disinfecting agents on the bonding and sealing ability of restorations bonded to dentin, the aim of this study was to evaluate the effect of chlorhexidine (CHX) disinfecting agent on the marginal gaps of Cl V giomer restorations. MATERIAL AND METHODS: Cl V cavities were prepared on the buccal surfaces of 60 sound bovine permanent incisors in this in vitro study, with the occlusal and gingival margins in enamel and dentin, respectively...
February 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28154317/depth-of-cure-flexural-properties-and-volumetric-shrinkage-of-low-and-high-viscosity-bulk-fill-giomers-and-resin-composites
#3
Akimasa Tsujimoto, Wayne W Barkmeier, Toshiki Takamizawa, Mark A Latta, Masashi Miyazaki
The purpose of this study was to investigate the depth of cure, flexural properties and volumetric shrinkage of low and high viscosity bulk-fill giomers and resin composites. Depth of cure and flexural properties were determined according to ISO 4049, and volumetric shrinkage was measured using a dilatometer. The depths of cure of giomers were significantly lower than those of resin composites, regardless of photo polymerization times. No difference in flexural strength and modulus was found among either high or low viscosity bulk fill materials...
February 1, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28002693/degree-of-conversion-and-polymerization-shrinkage-of-bulk-fill-resin-based-composites
#4
P Yu, Auj Yap, X Y Wang
This study evaluated the degree of conversion (DC) and polymerization shrinkage (PS) of contemporary bulk-fill resin-based composites (RBCs) including giomer materials. Two giomer bulk-fill (Beautifil Bulk Restorative [BBR], Beautifil Bulk Flowable [BBF]), two nongiomer bulk-fill (Tetric N-Ceram Bulk-fill [TNB], Smart Dentin Replacement [SDR]), and three conventional non-bulk-fill (Beautifil II [BT], Beautifil Flow Plus [BF], Tetric N-Ceram [TN]) RBCs were selected for the study. To evaluate the DC, disc-shaped specimens of 5-mm diameter and 2-mm, 4-mm, and 6-mm thickness were fabricated using customized Teflon molds...
January 2017: Operative Dentistry
https://www.readbyqxmd.com/read/27686259/local-deformation-fields-and-marginal-integrity-of-sculptable-bulk-fill-low-shrinkage-and-conventional-composites
#5
Vesna Miletic, Dejan Peric, Milos Milosevic, Dragica Manojlovic, Nenad Mitrovic
OBJECTIVE: To compare strain and displacement of sculptable bulk-fill, low-shrinkage and conventional composites as well as dye penetration along the dentin-restoration interface. METHODS: Modified Class II cavities (N=5/group) were filled with sculptable bulk-fill (Filtek Bulk Fill Posterior, 3M ESPE; Tetric EvoCeram Bulk Fill, Ivoclar Vivadent; fiber-reinforced EverX Posterior, GC; giomer Beautifil Bulk, Schofu), low-shrinkage (Kalore, GC), nanohybrid (Tetric EvoCeram, Ivoclar Vivadent) or microhybrid (Filtek Z250, 3M ESPE) composites...
September 26, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27563182/effects-of-thermal-fatigue-on-shear-punch-strength-of-tooth-colored-restoratives
#6
Fam Mei Shi Melody, Yap Adrian U-Jin, Tan Wei Min Natalie, Tay Wan Ling Elizabeth, Jessica Yeo Siu Chien
AIMS: This study investigated the effect of thermal fatigue on the shear strength of a range of tooth-colored restorative materials including giomers, zirconia-reinforced glass ionomer cement (GIC), nano-particle resin-modified GIC, highly viscous GICs, and composite resin. MATERIALS AND METHODS: Twenty specimens of each material were fabricated in standardized washers (17 mm outer diameter, 9 mm internal diameter, 1 mm thick). The specimens were cured, stored in 100% humidity at 37...
July 2016: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/27461814/a-comparative-evaluation-of-microleakage-and-compressive-strength-of-ketac-molar-giomer-zirconomer-and-ceram-x-an-in-vitro-study
#7
Rashmeet Walia, Purshottam Jasuja, Kanika Gupta Verma, Suruchi Juneja, Aditi Mathur, Lovejeet Ahuja
BACKGROUND: Microleakage around dental restorative material and strength to withstand the masticatory forces is major problem in dentistry. Instead, many new materials available, very few actually bond to tooth surface and bear masticatory load. AIM: The aim of this study is to evaluate and compare the microleakage and compressive strength of Ketac Molar, Giomer, Zirconomer, and Ceram-x. MATERIALS AND METHODS: For the evaluation of microleakage, Class V cavities were prepared on sixty human premolar teeth and divided into four study groups (n = 15): Group I (Ketac Molar), Group II (Giomer), Group III (Zirconomer), and Group IV (Ceram-x)...
July 2016: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/27461806/color-stability-of-esthetic-restorative-materials-used-in-pediatric-dentistry-an-in-vitro-study
#8
Hanisha Adusumilli, Jogendra Sai Sankar Avula, Pranitha Kakarla, Sujatha Bandi, George Manoj Kumar Mallela, Krishna Vallabhaneni
BACKGROUND: Children consume foods that are colorful which contain food additives that stain not only the tooth structure but also the restorations. As esthetics is of prime concern for both parents and children nowadays, long-term color stability of restorative materials is of utmost importance. AIM: To evaluate the color stability of two tooth-colored restorative materials (conventional glass ionomer cement [GIC] and giomer) when immersed in various consumable drinks and food (aerated beverage, ice candy, and health drink) at different immersion periods (low, moderate, and high)...
July 2016: Journal of the Indian Society of Pedodontics and Preventive Dentistry
https://www.readbyqxmd.com/read/27437363/comparative-evaluation-of-microleakage-between-nano-ionomer-giomer-and-resin-modified-glass-ionomer-cement-in-class-v-cavities-clsm-study
#9
Indira Priyadarshini Bollu, Archana Hari, Jayaprakash Thumu, Lakshmi Deepa Velagula, Nagesh Bolla, Sujana Varri, Srikanth Kasaraneni, Siva Venkata Malathi Nalli
INTRODUCTION: Marginal integrity of adhesive restorative materials provides better sealing ability for enamel and dentin and plays an important role in success of restoration in Class V cavities. Restorative material with good marginal adaptation improves the longevity of restorations. AIM: Aim of this study was to evaluate microleakage in Class V cavities which were restored with Resin Modified Glass Ionomer Cement (RMGIC), Giomer and Nano-Ionomer. MATERIALS AND METHODS: This in-vitro study was performed on 60 human maxillary and mandibular premolars which were extracted for orthodontic reasons...
May 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27146702/lack-of-buffering-by-composites-promotes-shift-to-more-cariogenic-bacteria
#10
I Nedeljkovic, J De Munck, V Slomka, B Van Meerbeek, W Teughels, K L Van Landuyt
Secondary caries (SC) remains a very important problem with composite restorations. The objectives of this study were to test the acid-buffering ability of several restorative materials and to evaluate whether buffering of the restorative material has an impact on the microbial composition of the biofilm. Disk-shaped specimens of conventional composite, composite with surface prereacted glass-ionomer filler particles (so-called giomer), glass-ionomer cement (GIC), amalgam, and hydroxyapatite (HAp) (control) were exposed to aqueous solutions with pH 4, 5, 6, and 7 and to the medium containing bacteria-produced acids, and pH changes were recorded over several days...
July 2016: Journal of Dental Research
https://www.readbyqxmd.com/read/27063989/evaluation-of-modern-bioactive-restoratives-for-bulk-fill-placement
#11
Nicoleta Ilie, Bogna Stawarczyk
OBJECTIVE: To investigate the impact of storage up to one year on the micro-mechanical properties of dental bioactive restoratives (R) used for bulk-application and their intermediate layer (IL) to dentin (D). METHODS: One giomer bulk-fill resin composite (RBC) and one glass-ionomer cement (GIC) were applied in 5-mm deep Class I cavities, which were prepared in 50 sound human molars. Specimens were stored in distilled water at 37°C for 24h, one week, one month, three months and one year...
June 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27063457/effects-of-coating-materials-on-nanoindentation-hardness-of-enamel-and-adjacent-areas
#12
Ehab Z Alsayed, Ilnaz Hariri, Syozi Nakashima, Yasushi Shimada, Turki A Bakhsh, Junji Tagami, Alireza Sadr
OBJECTIVES: Materials that can be applied as thin coatings and actively release fluoride or other bioavailable ions for reinforcing dental hard tissue deserve further investigation. In this study we assessed the potential of resin coating materials in protection of underlying and adjacent enamel against demineralization challenge using nanoindentation. METHODS: Enamel was coated using Giomer (PRG Barrier Coat, PBC), resin-modified glass-ionomer (Clinpro XT Varnish, CXT), two-step self-etch adhesive (Clearfil SE Protect, SEP) or no coating (control)...
June 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/26957792/comparative-study-of-fluoride-released-and-recharged-from-conventional-pit-and-fissure-sealants-versus-surface-prereacted-glass-ionomer-technology
#13
Elias Nahum Salmerón-Valdés, Rogelio J Scougall-Vilchis, Jorge Alanis-Tavira, Raúl Alberto Morales-Luckie
CONTEXT: The fluoride release of sealants in vitro shows a marked decrease. Giomers are distinguishable from manufactured resin-based sealants and contain prereacted glass-ionomer particles (PRG). AIMS: To compare the amounts of fluoride released from the main pit and fissure of a resin-based sealant with that from a Giomer and to assess the abilities of the sealant and the Giomer to recharge when exposed to regular use of fluoride rinse. MATERIALS AND METHODS: The readings for the fluoride concentration were carried out for 60 days using a fluoride ion-specific electrode...
January 2016: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/26548449/effect-of-a-third-generation-led-lcu-on-microhardness-of-tooth-colored-restorative-materials
#14
Nihan Gonulol, Sezin Ozer, Emine Sen Tunc
OBJECTIVE: To assess the effects of different modes of a third-generation light-curing unit (LCU) (VALO) on the microhardness of restorative materials. DESIGN: A microhybrid composite resin (Filtek(™) Z550), a giomer (Beautifil II), a compomer (Dyract eXtra) and a RMGIC (Photac(™) Fil) were used in the study. Three different modes of VALO were tested and a second-generation LCU (Elipar S10) was used as a control. The microhardness (VHN) was measured using a Vickers Hardness tester...
September 2016: International Journal of Paediatric Dentistry
https://www.readbyqxmd.com/read/26436037/a-comparative-evaluation-of-the-amount-of-fluoride-release-and-re-release-after-recharging-from-aesthetic-restorative-materials-an-in-vitro-study
#15
Ruchika Bansal, Tajinder Bansal
AIM: To measure the amount of fluoride released and re released after recharging from various restorative materials: Conventional Glass Ionomer Cement (Fuji II), Light Cure Resin Modified GIC (Fuji II LC), Giomer (Beautifil II), Compomer (Dyract). MATERIALS AND METHODS: Fifteen cylindrical specimens were prepared from each material. The specimens were immersed in 20 ml of deionized water. The amount of released fluoride was measured during the 1(st) day, 7(th) day and on the day15 by using specific fluoride electrode and an ion-analyser...
August 2015: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/26393212/comparative-evaluation-of-antimicrobial-efficacy-of-resin-modified-glass-ionomers-compomers-and-giomers-an-invitro-study
#16
P Tarasingh, J Sharada Reddy, K Suhasini, I Hemachandrika
BACKGROUND: Dental restorative materials, especially those applied in direct contact with the contaminated substrate, should have appropriate antibacterial activity in order to prevent residual bacteria from continuing their metabolic activity in addition to impairing new bacteria from reaching the tooth-restoration interface. AIM: To determine the antibacterial efficacy of three different restorative materials against the common cariogenic microorganism i.e., Streptococcus mutans...
July 2015: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/26258108/evaluation-of-shear-bond-strength-of-giomer-in-comparison-with-two-dentin-adhesive-systems
#17
Louay Touma, Oula Yassin
No abstract text is available yet for this article.
June 2015: Iranian Journal of Public Health
https://www.readbyqxmd.com/read/26161601/clinical-evaluation-of-restorative-materials-in-primary-teeth-class-ii-lesions
#18
RANDOMIZED CONTROLLED TRIAL
F Sengul, T Gurbuz
OBJECTIVE: The aim of this study was to evaluate clinical success of primary teeth class II lesions restored with different restorative materials [Hybrid Composite Resin (HCR), Resin Modified Glass Ionomer Cement (RMGIC), compomer, and Giomer Composite Resin (GCR)] followed up for 24 months. STUDY DESIGN: This study was carried out on 146 primary molars of 41 children in the age range of 5-7 years. The class II lesions in primary molars of a patient were restored using different restorative materials...
2015: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/25930017/in-vitro-comparison-of-polymerisation-kinetics-and-the-micro-mechanical-properties-of-low-and-high-viscosity-giomers-and-rbc-materials
#19
Nicoleta Ilie, Garry J P Fleming
OBJECTIVES: The study aims to characterise a low and high viscosity giomer bulk fill resin restorative with established low and high viscosity resin-based composite (RBC) restoratives at simulated clinical relevant specimen depths. METHODS: The irradiance of a light curing unit (Bluephase 20i) was measured on a laboratory-grade spectrometer at distances up to 10mm from the light tip (in 1mm increments). Polymerization kinetics (real-time decrease of CC double bond and degree of cure, DC) and micro-mechanical properties (Vickers hardness/HV; Depth of cure/DOC; Indentation modulus/E) were assessed at varying specimen depths (0...
July 2015: Journal of Dentistry
https://www.readbyqxmd.com/read/25779072/-fluoride-release-and-recharge-properties-of-six-restorative-materials
#20
Yajie Gui, Xinyi Zhao, Shibao Li, Lihui Tang, Xu Gong
OBJECTIVE: To evaluate the F(-) releasing and recharging properties of six dental restorative materials. METHODS: Disc specimens 10 mm in diameter and 1 mm in thickness were prepared from 6 different dental restorative materials: Fuji VII [glass ionomer cement (GIC)], Fuji II LC (light-curing, GIC), Beautifil (giomer), Compoglass F (compomer), Charisma (composite) and Experimental I (a fluoride releasing composite), with 10 discs for each material. Specimens were dipped in 5 ml deionized water and F(-) release was detected using a fluoride-specific ion electrode every day from 1-7 days and every three days from 8-28 days...
January 2015: Zhonghua Kou Qiang Yi Xue za Zhi, Zhonghua Kouqiang Yixue Zazhi, Chinese Journal of Stomatology
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