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https://www.readbyqxmd.com/read/29777311/sufficiency-of-curing-in-high-viscosity-bulk-fill-resin-composites-with-enhanced-opacity
#1
Nicoleta Ilie
OBJECTIVES: The study aims analyzing if improved opacity in modern high-viscosity bulk-fill resin composites (BF-RBC) contradicts with the sufficiency of curing and to assess material's tolerance to less ideal curing conditions. MATERIALS AND METHODS: Simulated large cavities (10 × 6) mm were filled in one increment with three BF-RBCs (Filtek One, FO; Tetric Evo Ceram Bulk Fill, TEC-BF; SonicFill2, SF2). One central and two peripheral (4 mm apart from the center) micromechanical property line-profiles (HV, Vickers hardness; YHU , indentation modulus) were measured in 0...
May 18, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29775637/modified-resin-infiltration-of-non-micro-and-cavitated-proximal-caries-lesions-in-vitro
#2
H Askar, F Schwendicke, J Lausch, H Meyer-Lueckel, S Paris
OBJECTIVE: Infiltrant resin (IR) is currently indicated for non-cavitated caries lesions. However, modifying the technique might expand its indication spectrum to micro-cavitated lesions. The present study aimed to evaluate the penetration/filling ability of a newly developed micro-filled infiltrant resin (MFIR) in non-, micro- and cavitated natural caries lesions. MATERIALS AND METHODS: Proximal lesions in 120 extracted human teeth with ICDAS-2 (n = 30), 3 (n = 45) and 5 (n = 45) lesions were etched with 15% hydrochloric acid gel for 2 min and allocated to one of the following treatments; IR: lesions (ICDAS-2, 3 and 5; each n = 15) were treated with commercial infiltrant resin for 3 min...
May 15, 2018: Journal of Dentistry
https://www.readbyqxmd.com/read/29770926/effect-of-mouthwashes-on-the-discolouration-of-restorative-materials-commonly-used-in-paediatric-dentistry
#3
N B Ulusoy, V Arikan, A Akbay Oba
AIM: This was to investigate the effects of Klorhex, Tantum Verde, Kloroben, and Listerine on the discolouration of composite resin, compomer, giomer, and resin-modified glass ionomer. METHODS: Fifty disc-shaped specimens from each restorative material (n = 50) were prepared; initial colour values were measured with a spectrophotometer. Forty specimens from each group were placed in the four different types of mouthwashes (n = 10), while the remaining 10 specimens were immersed in distilled water for 2 min, twice a day for a period of 3 weeks...
May 16, 2018: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29755618/wear-of-resin-composites-current-insights-into-underlying-mechanisms-evaluation-methods-and-influential-factors
#4
REVIEW
Akimasa Tsujimoto, Wayne W Barkmeier, Nicholas G Fischer, Kie Nojiri, Yuko Nagura, Toshiki Takamizawa, Mark A Latta, Masashi Miazaki
The application of resin composites in dentistry has become increasingly widespread due to the increased aesthetic demands of patients, improvements in the formulation of resin composites, and the ability of these materials to bond to tooth structures, together with concerns about dental amalgam fillings. As resistance to wear is an important factor in determining the clinical success of resin composite restoratives, this review article defines what constitutes wear and describes the major underlying phenomena involved in this process...
May 2018: Japanese Dental Science Review
https://www.readbyqxmd.com/read/29754275/zinc-oxide-eugenol-paste-jeopardises-the-adhesive-bonding-to-primary-dentine
#5
C W Pires, T L Lenzi, F Z M Soares, R O Rocha
AIM: This was to evaluate the influence of root canal filling pastes on microshear bond strength (µSBS) of an adhesive system to primary dentine. METHODS: Human (32) primary molars were randomly assigned into four experimental groups (n = 8): zinc oxide eugenol paste (ZOE); iodoform paste (Guedes-Pinto paste); calcium hydroxide paste thickened with zinc oxide; and no filling paste (control). Flat dentine surfaces were covered with a 1 mm-thick layer of the pastes for 15 min at 37 °C...
May 12, 2018: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/29736185/evaluation-of-different-restoration-combinations-used-in-the-reattachment-of-fractured-teeth-a-finite-element-analysis
#6
Nagihan Guven, Ozgur Topuz, İhsan Yikilgan
Objective: The purpose of this study was to test different restoration combinations used for constructing fractured endodontically treated incisors by reattaching their fractured fragments. Methods: Seven types of 3-D FEM mathematical root canal-filled models were generated, simulating cases of (OB) reattaching fractured fragments; (CrPL) reattaching fractured fragments + ceramic palatinal laminate; (CmPL) reattaching fractured fragments + composite palatinal laminate; (CM) reattaching fractured fragments + coronal 1/3 of the root was filled using core material; (BP) reattaching fractured fragments + glass fiber post; (CP) composite resin restoration + glass fiber post; and (OC) composite resin restoration...
2018: Applied Bionics and Biomechanics
https://www.readbyqxmd.com/read/29732015/push-out-bond-strength-of-intra-orifice-barrier-materials-bulk-fill-composite-versus-calcium-silicate-cement
#7
Taha Özyurek, Gülşah Uslu, Koray Yilmaz
Background. The aim of this study was to compare the push-out bond strengths of calcium silicate-based ProRoot MTA and Biodentine cements and SureFil SDR and EverX Posterior bulk-fill composite resins. Methods. Twenty-four single-rooted maxillary central incisors were sectioned below the cementoenamel junction, and the root canals were instrumented using rotary files. Thereafter, a parallel post drill was used to obtain a standardized root canal dimension. The roots were randomly assigned to one of the following groups with respect to the intra-orifice barrier used: ProRoot MTA; Biodentine; SureFil SDR; EverX Posterior...
2018: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/29732014/comparison-of-the-shear-bond-strength-of-silorane-based-composite-resin-and-methacrylate-based-composite-resin-to-mta
#8
Buse Ayse Serin, Muharrem Cem Dogan, Hamdi Oguz Yoldas
Background. Mineral trioxide aggregate (MTA) is a material that has recently gained popularity in the application of the vital pulp therapy. Along with the increasing use of MTA to this end, the permanent restoration material to be placed on MTA has become a significant issue. The aim of this in vitro study was to investigate the bond strength of the novel low-shrinkage silorane-based composite resin (SBC) to MTA. Methods. Twenty acrylic blocks filled with MTA were prepared for this study. SBC was the test group and methacrylate-based composite resin (MBC) was used as the control group...
2018: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/29724550/effect-of-different-resin-cements-and-surface-treatments-on-the-shear-bond-strength-of-ceramic-glass-polymer-materials
#9
Gülce Alp, Meryem Gülce Subaşı, William M Johnston, Burak Yilmaz
STATEMENT OF PROBLEM: The effect of different surface treatment techniques on the bond strength of different types of ceramic-glass polymer computer-assisted design and computer-assisted manufacturing (CAD-CAM) materials and resin cements after aging is unknown. PURPOSE: The purpose of this in vitro study was to evaluate the surface roughness of different ceramic-glass polymer CAD-CAM materials after 2 different surface treatments and the effect of material, surface treatment, resin cement, and aging on bond strength...
April 30, 2018: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29714704/depth-of-cure-of-proximal-composite-resin-restorations-using-a-new-perforated-metal-matrix
#10
Duke P Nguyen, Nancy C Motyka, Erik J Meyers, Kraig S Vandewalle
The purpose of this study was to compare the depths of cure of a proximal box preparation filled in bulk with various approaches: filled with a bulk-fill or conventional composite; placed with a new perforated metal matrix, a traditional metal matrix, or a clear matrix; and polymerized with either occlusal-only or tri-sited light curing. After tri-sited curing, the use of the new perforated metal matrix band resulted in a depth of cure that was not significantly different from that achieved with the use of metal bands (removed during curing) or transparent matrix bands...
May 2018: General Dentistry
https://www.readbyqxmd.com/read/29714702/effect-of-fiber-inserts-on-gingival-margin-microleakage-of-class-ii-bulk-fill-composite-resin-restorations
#11
Fereshteh Shafiei, Maryam Doozandeh, Vahid Karimi
This study evaluated the effect of fiber inserts combined with composite resins on enamel and dentin margin microleakage. The fiber inserts were used with high- (x-tra fil) and low-viscosity (x-tra base) bulk-fill composite resins and as well as conventional composite resins (Grandio and Grandio Flow). In 96 sound, recently extracted molars, 2 standardized Class II cavities were prepared. The teeth were randomly divided into 8 groups of 12 teeth each, based on composite resin type and presence or absence of fiber inserts: groups 1 and 2, x-tra fil with and without fiber inserts, respectively; groups 3 and 4, x-tra base with and without fiber inserts; groups 5 and 6, Grandio with and without fiber inserts; and groups 7 and 8, Grandio Flow liner (gingival floor)/Grandio (remainder of cavity) with and without fiber inserts...
May 2018: General Dentistry
https://www.readbyqxmd.com/read/29713891/comparison-of-light-propagation-in-dental-tissues-and-nano-filled-resin-based-composite
#12
Hanan Elgendy, Rodrigo Rocha Maia, Fredrick Skiff, Gerald Denehy, Fang Qian
OBJECTIVE: This study used three LASERs (red, green, and blue) with a spectrophotometer to compare the light propagation for the following: absorption (A), transmittance (T), attenuation (K), and scattering anisotropy coefficient (g) in dental tissues and nano-filled resin-based composites. This study used three distinct incremental build-up techniques, which included one shade (body), two shades (enamel and dentin), and three shades (enamel, transparent, and dentin). METHODS: Twenty human, un-erupted, recently extracted third molars (shade B1) were used to obtain 40 tooth slabs...
April 30, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29692830/-in-vitro-mechanical-properties-of-mineral-trioxide-aggregate-in-moist-and-dry-intracanal-environments
#13
Radovan Žižka, Radim Čtvrtlík, Jan Tomaštík, Kamila Fačevicová, Ladislav Gregor, Jiří Šedý
Introduction: The purpose of this study was to examine the microhardness and modulus of elasticity (MOE) of White ProRoot MTA (Dentsply Tulsa Dental, Tulsa, OK) after setting in moist or dry intracanal conditions. Methods and Materials: To simulate root canal system, 14 polyethylen molds with internal diameter of 1 mm and height of 12 mm were used. These molds were filled with 9-mm thick layers of White ProRoot Mineral Trioxide Aggregate (MTA; Dentsply Tulsa Dental, Tulsa, OK)...
2018: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/29689648/qualitative-analysis-of-the-margins-of-restorations-made-with-different-filling-resins
#14
Monika Ostapiuk, Bożena Tarczydło, Barbara Surowska, Mirosław Orłowski, Barbara Tymczyna, Teresa Bachanek, Anna Rzepecka, Anna Mróz
PURPOSE: In this study the comparative results obtained from examinations of two different restorative composites with different cavities filling method are presented. Micro-CT was used for the evaluation of the marginal integrity and quality of composite fillings in connection with microstructural investigations made by both optical and scanning electron microscopy. MATERIALS AND METHODS: The examinations of dental tooth filings in bulk-fill technique were based on micro-CT and microscopy observations...
April 24, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29689293/molar-cusp-deformation-evaluated-by-micro-ct-and-enamel-crack-formation-to-compare-incremental-and-bulk-filling-techniques
#15
Laís Rani Sales Oliveira, Stella Sueli Lourenço Braga, Aline Arêdes Bicalho, Maria Tereza Hordones Ribeiro, Richard Bengt Price, Carlos José Soares
OBJECTIVES: To describe a method of measuring the molar cusp deformation using micro-computed tomography (micro-CT), the propagation of enamel cracks using transillumination, and the effects of hygroscopic expansion after incremental and bulk-filling resin composite restorations. METHODS: Twenty human molars received standardized Class II mesio-occlusal-distal cavity preparations. They were restored with either a bulk-fill resin composite, X-tra fil (XTRA), or a conventional resin composite, Filtek Z100 (Z100)...
April 21, 2018: Journal of Dentistry
https://www.readbyqxmd.com/read/29680851/lichenoid-lesions-of-the-upper-lip-a-retrospective-study-of-24-cases
#16
N Katsoulas, K Tosios, A Sklavounou-Andrikopoulou
BACKGROUND: Lichenoid lesions of the upper labial mucosa, without other oral or extraoral manifestations seem to be rare. The clinicopathologic features of 24 such cases are presented and the pertinent literature is reviewed. MATERIALS AND METHODS: 24 Caucasian patients that clinically presented lichenoid features on the upper labial mucosa, with or without lichenoid lesions on the adjacent gingiva, were included in the study. Clinical features were extracted from the patients records, while dental plaque/calculus accumulation and composite resin restorations of the adjacent teeth were recorded...
April 22, 2018: Medicina Oral, Patología Oral y Cirugía Bucal
https://www.readbyqxmd.com/read/29680592/a-new-methodology-to-prepare-ceramic-organic-composite-coatings-with-good-cavitation-erosion-resistance
#17
Wen Deng, Guoliang Hou, Shuangjian Li, Jiesheng Han, Xiaoqin Zhao, Xia Liu, Yulong An, Huidi Zhou, Jianmin Chen
A simple, scalable and economical method was proposed to obtain ceramic-organic composite coating with excellent comprehensive properties include hardness, toughness, elastic recovery, lamellar interfacial bonding and anti-cavitation erosion: introducing epoxy resin into the pores and micro-cracks of plasma sprayed ceramic coating. The results indicate that the epoxy resin was successfully penetrated into the whole ceramic coating and filled almost all defects by vacuum impregnation, which greatly enhanced its compactness and mechanical properties...
June 2018: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/29673709/evaluation-of-the-filler-packing-structures-in-dental-resin-composites-from-theory-to-practice
#18
Ruili Wang, Eric Habib, X X Zhu
OBJECTIVES: The aim of this study is to evaluate the packing properties of uniform silica particles and their mixture with secondary particles yielding maximally loaded dental composites. We intend to verify the difference between the idealized models (the close-packed structures and the random-packed structures) and the actual experimental results, in order to provide guidance for the preparation of dental composites. The influence of secondary particle size and the resin composition on the physical-mechanical properties and the rheological properties of the experimental dental composites was also investigated...
April 16, 2018: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29664155/effect-of-a-filled-adhesive-as-the-desensitizer-on-bond-strength-of-self-adhesive-cements-to-differently-severity-of-fluorosed-dentin
#19
Yujie Tan, Mengqin Gu, Wangyang Li, Ling Guo
The objectives were to evaluate the efficacy of a filled adhesive named Prime & Bond NT (P&B NT) as the dentin desensitizer in occluding fluorosis dentinal tubules and compare the shear bond strength (SBS) of RelyX U200 self-adhesive resin cement (RXU) and RelyX Luting self-adhesive resin-modified glass ionomer cement (RMGIC) before and after P&B NT pretreatment. 176 non-carious fluorosis were classified into four subgroups by the Thylstrup and Fejerskov index (TFI): normal group (TFI = 0), mild group (TFI = 1-3), moderate group (TFI = 4-5), severe group (TFI = 6-9)...
April 17, 2018: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29627738/polymerization-shrinkage-stress-of-resin-based-dental-materials-a-systematic-review-and-meta-analyses-of-composition-strategies
#20
REVIEW
Carine Tais Welter Meereis, Eliseu Aldrighi Münchow, Wellington Luiz de Oliveira da Rosa, Adriana Fernandes da Silva, Evandro Piva
PURPOSE: A systematic review was conducted to determine whether there were composition strategies available to reduce and control polymerization shrinkage stress development in resin-based restorative dental materials. DATA SOURCES: This report was reported in accordance with the PRISMA Statement. Two reviewers performed a literature search up to December 2016, without restriction of the year of publication, in seven databases: PubMed, Web of Science, Scopus, SciELO, LILACS, IBECS, and BBO...
March 23, 2018: Journal of the Mechanical Behavior of Biomedical Materials
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