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Composite resin fillings

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https://www.readbyqxmd.com/read/28721100/shear-bond-strength-of-different-surface-treatments-in-bulk-fill-microhybrid-and-nanoparticle-repair-resins
#1
Rudys Rodolfo de Jesus Tavarez, Lauber Jose Dos Santos Almeida Júnior, Tayanne Christine Gomes Guará, Izabella Santos Ribeiro, Etevaldo Matos Maia Filho, Leily Macedo Firoozmand
OBJECTIVES: The purpose of this study was to evaluate the influence of surface treatment and different types of composite resin on the microshear bond strength of repairs. MATERIALS AND METHODS: Seventy-two specimens (n=72) were prepared using a nanoparticle resin and stored in artificial saliva at 37 ± 1°C for 24 h. After this period, the specimens (n=24) were restored with microhybrid resin P60 (3M ESPE), nanoparticle resin Filtek Z350 (3M ESPE), and Bulk Fill Surefil SDR Flow (Dentsply) composite resins...
2017: Clinical, Cosmetic and Investigational Dentistry
https://www.readbyqxmd.com/read/28717632/effect-of-different-intracoronal-bleaching-methods-on-shear-bond-strength-of-ceramic-brackets-bonded-to-bleached-enamel-an-in-vitro-study
#2
Vikas Chauhan, Piush Kumar, Payal Sharma, Divya Shetty
OBJECTIVE: To investigate the effect of different intracoronal bleaching methods on the shear bond strength and site of failure of ceramic brackets. MATERIALS AND METHODS: Sixty freshly extracted human maxillary incisors were randomly divided into four groups (n = 15). Endodontic access cavity was prepared and root canals were filled, root fillings were removed 2mm apical to the cementoenamel junction, and a 2-mmthick layer of glass ionomer cement base was applied...
July 2017: Journal of Orthodontic Science
https://www.readbyqxmd.com/read/28715749/self-assembly-of-zinc-hydroxystannate-on-amorphous-hydrous-tio2-solid-sphere-for-enhancing-fire-safety-of-epoxy-resin
#3
Wei Wang, Yongchun Kan, Jiajia Liu, Kim Meow Liew, Lei Liu, Yuan Hu
Zinc hydroxystannate (ZHS) was fabricated on the surface of amorphous hydrous TiO2 solid spheres (AHTSS) via a layer-by-layer method for improving the fire safety of epoxy resin. AHTSS@PEI@ZHS was prepared by self-assembly of AHTSS, PEI and ZHS. The well-organized fabrication process was proved by TEM, XPS, XRD and SEM tests. TG results illustrated that the incorporation of AHTSS@PEI@ZHS show a higher residue compared with the addition of AHTSS or ZHS alone. In addition, AHTSS@PEI@ZHS filled EP composites exhibits improved flame retardancy and smoke suppression properties evaluated by cone calorimeter test...
June 28, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28713512/laboratory-evaluation-of-the-effect-of-unfilled-resin-after-the-use-of-self-etch-and-total-etch-dentin-adhesives-on-the-shear-bond-strength-of-composite-to-dentin
#4
Ehsan Baradaran Nasseri, Sara Majidinia, Davood Aghasizadeh Sharbaf
BACKGROUND: Based on the frequent application of composite resins as tooth-colored fillings, this method is considered a viable alternative to dental amalgam. However, this method has the low bond strength of the composite to dentin. To solve this issue, various dental adhesive systems with different characteristics have been developed by dentistry experts. AIM: To assess the effect of an additional layer of unfilled resin in self-etch and total-etch dentin adhesives on the shear bond strength (SBS) of composite to dentin...
May 2017: Electronic Physician
https://www.readbyqxmd.com/read/28709677/functional-and-esthetic-restorative-treatment-with-preheated-resins-in-a-patient-with-ectodermic-dysplasia-a-clinical-report
#5
José M Olivares, Alonso Hidalgo, Juan P Pavez, Dafna Benadof, Roberto Irribarra
Ectodermal dysplasia is a heterogeneous genetic condition affecting 1.6 to 22 per 100000 people. Oral manifestations associated with this condition include hyperdontia, hypodontia, microdontia, and conical teeth. Traditional treatment consists of a combination of orthodontic and rehabilitation therapies. The initial treatment stage uses removable prostheses and interim crowns for long periods, thus increasing risks for developing secondary caries. This clinical report describes the use of direct composite resin bonding with preheated compactable resins applied to vacuum-formed trays filled with clear silicone...
July 11, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28708123/the-feasibility-and-functional-performance-of-ternary-borate-filled-hydrophilic-bone-cements-targeting-therapeutic-release-thresholds-for-strontium
#6
Kathleen MacDonald, Richard B Price, Daniel Boyd
We examine the feasibility and functionality of hydrophilic modifications to a borate glass reinforced resin composite; with the objective of meeting and maintaining therapeutic thresholds for Sr release over time, as a potential method of incorporating antiosteoporotic therapy into a vertebroplasty material. Fifteen composites were formulated with the hydrophilic agent hydroxyl ethyl methacrylate (HEMA, 15, 22.5, 30, 37.5 or 45 wt% of resin phase) and filled with a borate glass (55, 60 or 65 wt% of total cement) with known Sr release characteristics...
July 14, 2017: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/28700083/torsional-resistance-of-xp-endo-shaper-at-body-temperature-compared-with-several-nickel-titanium-rotary-instruments
#7
A M Elnaghy, S E Elsaka
AIM: To compare the torsional resistance of XP-endo Shaper (XPS; size 30, 0.01 taper, FKG Dentaire, La Chaux-de-Fonds, Switzerland) instruments at body temperature with TRUShape (TRS; size 30, 0.06 taper, Dentsply Tulsa Dental Specialties, Tulsa, OK, USA), ProFile Vortex (PV; size 30, 0.04 taper, Dentsply Tulsa Dental Specialties), and FlexMaster (FM; size 30, 0.04 taper, VDW GmbH, Munich, Germany) nickel-titanium rotary instruments. METHODOLOGY: A metal block with a square-shaped mould (5 mm × 5 mm × 5 mm) was positioned inside a glass-container...
July 12, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28691101/advancing-discontinuous-fiber-reinforced-composites-above-critical-length-for-replacing-current-dental-composites-and-amalgam
#8
Richard C Petersen
Clinicians have been aware that posterior dental particulate-filled composites (PFCs) have many placement disadvantages and indeed fail clinically at an average rate faster than amalgam alloys. Secondary caries is most commonly identified as the chief failure mechanism for both dental PFCs and amalgam. In terms of a solution, fiber-reinforced composites (FRCs) above critical length (Lc) can provide mechanical property safety factors with compound molding packing qualities to reduce many problems associated with dental PFCs...
February 2017: Journal of Nature and Science
https://www.readbyqxmd.com/read/28688735/implications-of-resin-based-composite-rbc-restoration-on-cuspal-deflection-and-microleakage-score-in-molar-teeth-placement-protocol-and-restorative-material
#9
Lauren E J McHugh, Ioanna Politi, Rami S Al-Fodeh, Garry J P Fleming
OBJECTIVE: To assess the cuspal deflection of standardised large mesio-occluso-distal (MOD) cavities in third molar teeth restored using conventional resin-based composite (RBC) or their bulk fill restorative counterparts compared with the unbound condition using a twin channel deflection measuring gauge. Following thermocycling, the cervical microleakage of the restored teeth was assessed to determine marginal integrity. METHODS: Standardised MOD cavities were prepared in forty-eight sound third molar teeth and randomly allocated to six groups...
July 5, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28684960/effect-of-mouthwashes-on-solubility-and-sorption-of-restorative-composites
#10
José Pereira Leal, Jaqueline Damasceno da Silva, Rafaelle Fernanda Melão Leal, Carlos da Cunha Oliveira-Júnior, Vera Lúcia Gomes Prado, Glauber Campos Vale
OBJECTIVE: Composites sorption and solubility can be precursors of several chemical and physical processes, which lead to deleterious effects on the polymer structure. This study evaluated the effect of mouthwashes on solubility and sorption of composite resins. MATERIALS AND METHODS: Forty-two specimens of each evaluated composite (Filtek Bulk Fill Flow, Opallis Flow, Durafill VS, and Filtek Z350) were prepared and randomized into seven groups for each solution (mouth rinses with and without alcohol and distilled water) and stored for seven days...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28684811/short-communication-posterior-composites-update-on-cavities-and-filling-techniques
#11
(no author information available yet)
'The use of high intensity plasma lights is not recommended' as they result in greater shrinkage of the resin composite.
July 7, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28662878/bonding-over-dentin-replacement-materials
#12
Naghmeh Meraji, Josette Camilleri
INTRODUCTION: Dentin replacement materials are necessary in large cavities to protect the pulp and reduce the bulk of filling material. These materials are layered with a composite resin restorative material. Microleakage caused by poor bonding of composite resin to underlying dentin replacement material will result in pulp damage. The aim of this study was to characterize the interface between dentin replacement materials and composite resin and to measure the shear bond strength after dynamic aging...
June 26, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28652556/characteristics-of-low-polymerization-shrinkage-flowable-resin-composites-in-newly-developed-cavity-base-materials-for-bulk-filling-technique
#13
Keiko Nitta, Rie Nomoto, Yuji Tsubota, Masuji Tsuchikawa, Tohru Hayakawa
The purpose of this study was to evaluate polymerization shrinkage and other physical properties of newly-developed cavity base materials for bulk filling technique, with the brand name BULK BASE (BBS). Polymerization shrinkage was measured according to ISO/FDIS 17304. BBS showed the significantly lowest polymerization shrinkage and significantly higher depth of cure than conventional flowable resin composites (p<0.05). The Knoop hardness, flexural strength and elastic modulus of that were significantly lower than conventional flowable resin composites (p<0...
June 23, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28626204/intrapulpal-temperature-changes-during-curing-of-different-bulk-fill-restorative-materials
#14
Elif Yasa, Cigdem Atalayin, Gamze Karacolak, Tugrul Sari, L Sebnem Turkun
The aim of this study was to evaluate the intrapulpal temperature changes during the curing of different bulk-fill restorative materials. Ten mandibular molar teeth were selected and occlusal surfaces were removed to obtain a standard 0.5 mm occlusal dentin thickness. Five bulk-fill restorative materials and a conventional resin composite (control) were applied. The intrapulpal temperature changes during the curing of these materials were determined by a device simulating pulpal blood microcirculation. The difference between the initial and maximum temperature values (Δt), was recorded...
June 15, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28609509/connective-tissue-graft-and-crown-resin-composite-restoration-for-the-treatment-of-gingival-recession-associated-with-noncarious-cervical-lesions-case-series
#15
Camila Augusto Silveira, Ingrid Fernandes Mathias, Felipe Lucas da Silva Neves, Nídia Cristina Castro Dos Santos, Cássia Fernandes Araújo, Maria Aparecida Neves Jardini, Eduardo Bresciani, Mauro Pedrine Santamaria
The purpose of this case series is to describe a restorative and surgical approach to treat the combined defect (CD)-gingival recession associated with noncarious cervical lesions (NCCL)-through connective tissue graft in combination with partial resin composite filling, restoring the crown zone plus 1 mm of the NCCL. A total of 10 patients were included. Bleeding on probing, probing depth, relative gingival recession, clinical attachment level, CD height, and dentin hypersensitivity were measured. The treatment provided statistically significant gain in clinical attachment level and shallow probing depths...
July 2017: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/28597007/tensile-bond-strength-of-so-called-universal-primers-and-universal-multimode-adhesives-to-zirconia-and-lithium-disilicate-ceramics
#16
Adham Elsayed, Feras Younes, Frank Lehmann, Matthias Kern
PURPOSE: To test the bond strength and durability after artificial aging of so-called universal primers and universal multimode adhesives to lithium disilicate or zirconia ceramics. MATERIALS AND METHODS: A total of 240 ceramic plates, divided into two groups, were produced and conditioned: 120 acid-etched lithium disilicate plates (IPS e.max CAD) and 120 air-abraded zirconia plates (Zenostar T). Each group was divided into five subgroups (n = 24), and a universal restorative primer or multimode universal adhesive was used for each subgroup to bond plexiglas tubes filled with a composite resin to the ceramic plate...
June 8, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28584779/evaluation-of-surface-roughness-of-different-direct-resin-based-composites
#17
Nashaat Mohammed Magdy, Mohammed Zaheer Kola, Hamod Hussain Alqahtani, Mubarak Daghash Alqahtani, Abdullah Saud Alghmlas
AIMS AND OBJECTIVE: To evaluate surface roughness of different resin-based composites. MATERIALS AND METHODS: Three resin composites, one nanohybrid, one nanoceramic, and one bulk-fill resin-based composite, were used in this study. Cylindrical Teflon mold and 8 mm in diameter and 2 mm in thickness disc specimens were prepared. For each composite material, 15 discs were fabricated, with a total of sixty discs were obtained (n = 60). A glass slide 1-2 mm thick was placed over the strip before curing with the light-curing unit to flatten the surfaces...
May 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28581919/thirty-six-month-clinical-comparison-of-bulk-fill-and-nanofill-composite-restorations
#18
A R Yazici, S A Antonson, Z B Kutuk, E Ergin
OBJECTIVES: The aim of this study was to evaluate the clinical performance of a nanofill and a bulk fill resin composite in class II restorations. METHODS AND MATERIALS: In accordance with a split-mouth design, 50 patients received at least one pair of restorations, restored with a nanofill resin composite (Filtek Ultimate [FU]) and with a bulk fill resin composite (Tetric EvoCeram Bulk Fill [TB]). Each restorative resin was used with its respective adhesive system according to the manufacturers' instructions...
June 5, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28576660/impact-of-light-transmittance-mode-on-polymerisation-kinetics-in-bulk-fill-resin-based-composites
#19
Nicoleta Ilie
OBJECTIVES: to determine the mode of light transmission and its impact on the polymerisation kinetic in modern bulk-fill resin-based composites (B-RBC). MATERIALS AND METHODS: Four low-viscosity methacrylate-based and one high-viscosity ormocer-based B-RBCs were considered. One material was available in three different shades that were all analyzed. Polymerization kinetic and light transmittance were assessed in 2 and 4mm specimen depths. Incident and transmitted irradiance and radiant exposure were measured in real-time on a laboratory-grade spectrometer...
May 30, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28574451/effect-of-montmorillonite-nanogel-composite-fillers-on-the-protection-performance-of-epoxy-coatings-on-steel-pipelines
#20
Ayman M Atta, Ashraf M El-Saeed, Hamad A Al-Lohedan, Mohamed Wahby
Montmorillonite (MMT) clay mineral is widely used as filler for several organic coatings. Its activity is increased by exfoliation via chemical modification to produce nanomaterials. In the present work, the modification of MMT to form nanogel composites is proposed to increase the dispersion of MMT into epoxy matrices used to fill cracks and holes produced by the curing exotherms of epoxy resins. The dispersion of MMT in epoxy improved both the mechanical and anti-corrosion performance of epoxy coatings in aggressive marine environments...
June 2, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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