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Operative Dentistry

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https://www.readbyqxmd.com/read/28708007/effect-of-hydrofluoric-acid-concentration-and-etching-time-on-bond-strength-to-lithium-disilicate-glass-ceramic
#1
J Puppin-Rontani, D Sundfeld, A R Costa, A B Correr, R M Puppin-Rontani, G A Borges, Mac Sinhoreti, L Correr-Sobrinho
The aim of this study was to evaluate the influence of different concentrations of hydrofluoric acid (HF) associated with varied etching times on the microshear bond strength (μSBS) of a resin cement to a lithium disilicate glass ceramic. Two hundred seventy-five ceramic blocks (IPS e.max Press [EMX], Ivoclar Vivadent), measuring 8 mm × 3 mm thickness, were randomly distributed into five groups according to the HF concentrations (n=50): 1%, 2.5%, 5%, 7.5%, and 10%. Further random distribution into subgroups was performed according to the following etching times (n=10): 20, 40, 60, 120, and 20 + 20 seconds...
July 14, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28708006/a-near-visual-acuity-test-for-dentists
#2
P Perrin, M Eichenberger, K W Neuhaus, A Lussi
Unimpaired near vision is crucial in dentistry, but appropriate visual tests at dental working distance are not publicly available. The aim of this study was to validate a novel visual triage test for dentists that is easy to use and freely available. The near visual acuity at 300 mm of 106 dental professionals (aged 21-65 years) was assessed with 1) a validated near visual test for scientific purposes miniaturized on a microfilm; 2) an experimental test using a US $5 bill, in which the first five words of each line in the Lincoln Memorial frieze had to be read under a dental operating light...
July 14, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28605612/influence-of-different-curing-modes-on-polymerization-behavior-and-mechanical-properties-of-dual-cured-provisional-resins
#3
S Shibasaki, T Takamizawa, T Suzuki, K Nojiri, A Tsujimoto, W W Barkmeier, M A Latta, M Miyazaki
This study determined the influence of curing mode on polymerization behavior and mechanical properties of dual-cured provisional resins. Three dual-cured bisacryl-based provisional resins were used: Tempsmart (TS; GC Corp), Luxatemp Automix Solar (LX; DMG Chemisch Pharmazeutishe Fabrik GmbH), and Integrity Multi·Cure (IG; Dentsply Caulk). A self-cured bisacryl-based provisional resin, Protemp Plus (PP; 3M ESPE) and a conventional poly(methyl methacrylate) (PMMA) provisional resin, Unifast III (UF; GC Corp) were used as controls...
June 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28605611/short-and-long-term-bond-strength-between-resin-cement-and-glass-ceramic-using-a-silane-containing-universal-adhesive
#4
F Murillo-Gómez, F A Rueggeberg, M F De Goes
This study aimed to evaluate the effect of various silane-containing solutions on bonding between resin cement and glass ceramic after 24 hours and after six months of water storage. Glass-ceramic plaques (IPS e.max CAD) were sandblasted with aluminum oxide, etched with 10% hydrofluoric acid (HF), and divided into five "silane treatment" groups: RelyX Ceramic Primer (RCP), RelyX Ceramic Primer and Single Bond Plus (RCP+SB), Scotchbond Universal (SBU), Clearfil Ceramic Primer (CP), and no solution (HF-only control)...
June 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28605610/effect-of-light-curing-exposure-time-shade-and-thickness-on-the-depth-of-cure-of-bulk-fill-composites
#5
A Rodriguez, P Yaman, J Dennison, D Garcia
PURPOSE:   To investigate the effect of different light exposure times, shades, and thicknesses on the depth of cure (DOC) of bulk fill composites. METHODS AND MATERIALS:   Two bulk fill composites, Tetric EvoCeram Bulk Fill (TBF) and Sonic Fill (SF), and a conventional composite, Filtek Supreme Ultra (FSU), were evaluated. Samples (n=10) were made using two different shades (light and dark), thicknesses (2 and 4 mm) and exposure times (20 and 40 seconds). A Tukon 2100B-testing machine was used to obtain three Knoop hardness numbers (KHNs) measured at the top and bottom of each sample, and DOC was calculated as the bottom/top ratio...
June 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28581920/randomized-clinical-trial-to-evaluate-mta-indirect-pulp-capping-in-deep-caries-lesions-after-24-months
#6
U Koc Vural, A Kiremitci, S Gokalp
OBJECTIVE: This clinical study aimed to assess the efficacies of mineral trioxide aggregate (MTA) and calcium hydroxide [Ca(OH)2] in the treatment of deep carious lesions by the direct complete caries removal technique. METHODS AND MATERIALS: A total of 100 permanent molar/premolar teeth were capped with either Ca(OH)2 (n=49) or MTA (n=51) and restored with composite resin in 73 patients. Periapical radiographs were acquired prior to the treatment as well as at six, 12, and 24 months posttreatment...
June 5, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28581919/thirty-six-month-clinical-comparison-of-bulk-fill-and-nanofill-composite-restorations
#7
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/28581918/battery-charge-affects-the-stability-of-light-intensity-from-light-emitting-diode-light-curing-units
#8
A Tongtaksin, C Leevailoj
This study investigated the influence of battery charge levels on the stability of light-emitting diode (LED) curing-light intensity by measuring the intensity from fully charged through fully discharged batteries. The microhardness of resin composites polymerized by the light-curing units at various battery charge levels was measured. The light intensities of seven fully charged battery LED light-curing units-1) LY-A180, 2) Bluephase, 3) Woodpecker, 4) Demi Plus, 5) Saab II, 6) Elipar S10, and 7) MiniLED-were measured with a radiometer (Kerr) after every 10 uses (20 seconds per use) until the battery was discharged...
June 5, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28581917/influence-of-emission-spectrum-and-irradiance-on-light-curing-of-resin-based-composites
#9
Cak Shimokawa, B Sullivan, M L Turbino, C J Soares, R B Price
PURPOSE: This study examined the influence of different emission spectra (single-peak and broad-spectrum) light-curing units (LCUs) delivering the same radiant exposures at irradiance values of 1200 or 3600 mW/cm(2) on the polymerization and light transmission of four resin-based composites (RBCs). METHODS AND MATERIALS: Two prototype LCUs that used the same light tip, but were either a single-peak blue or a broad-spectrum LED, were used to deliver the same radiant exposures to the top surfaces of the RBCs using either standard (1200 mW/cm(2)) or high irradiance (3600 mW/cm(2)) settings...
June 5, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28682704/clinical-evaluation-of-a-silorane-and-a-methacrylate-based-resin-composite-in-class-ii-restorations-24-month-results
#10
E Karaman, A R Yazici, G Ozgunaltay, I Ustunkol, A Berber
OBJECTIVE: To compare the 24-month clinical performance of two different resin composites in class II slot restorations. METHODS AND MATERIALS: Thirty-seven patients having at least two approximal carious lesions were enrolled in the study. A total of 116 teeth (58 pairs) were restored with either a silorane-based composite (Filtek Silorane) and its self-etch adhesive (Silorane Adhesive System, 3M ESPE) or a methacrylate-based packable resin composite (X-tra Fil) and its self-etch adhesive (Futurabond NR, VOCO GmbH) according to the toss of a coin...
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28682703/clinical-performance-of-different-solvent-based-dentin-adhesives-with-nanofill-or-nanohybrid-composites-in-class-iii-restorations-five-year-results
#11
M Demirci, S Tuncer, H S Sancaklı, N Tekçe, C Baydemir
PURPOSE: To evaluate the clinical performance of water, acetone, ethanol, and ethanol-water solvent-based dentin adhesives with nanofill or nanohybrid composites in Class III restorations. METHODS AND MATERIALS: A total of 22 patients aged between 14 and 48 years (mean age: 25.2 years) participated in the study. Each patient received four Class III restorations, which were performed using water (Scotchbond Multipurpose), acetone (Prime&Bond NT), ethanol (XP Bond) and ethanol-water (Xeno V) solvent-based dentin adhesive systems with a nanofill (Filtek Supreme XT) or nanohybrid composite (CeramX Duo)...
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28682702/masking-of-enamel-fluorosis-discolorations-and-tooth-misalignment-with-a-combination-of-at-home-whitening-resin-infiltration-and-direct-composite-restorations
#12
J Perdigão, V Q Lam, B G Burseth, C Real
This clinical report illustrates a conservative technique to mask enamel discolorations in maxillary anterior teeth caused by hypomineralization associated with enamel fluorosis and subsequent direct resin composite to improve the anterior esthetics. The treatment consisted of at-home whitening with 10% carbamide peroxide gel with potassium nitrate and sodium fluoride in a custom-fitted tray to mask the brown-stained areas, followed by resin infiltration to mask the white spot areas. An existing resin composite restoration in the maxillary right central incisor was subsequently replaced after completion of the whitening and resin infiltration procedures, whereas the two misaligned and rotated maxillary lateral incisors were built up with direct resin composite restorations to provide the illusion of adequate arch alignment, as the patient was unable to use orthodontic therapy...
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28682701/online-only-articles
#13
(no author information available yet)
On occasion we receive manuscripts that we would like to publish, but do not have the page room to include in the print journal. For the full article, please go to www.jopdentonline.org or enter the provided address into your address bar.
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28682700/ivar-andreas-mj%C3%A3-r-1933-2017
#14
Nairn Wilson, Valeria Gordan
No abstract text is available yet for this article.
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402738/ferrule-effect-dominates-over-use-of-a-fiber-post-when-restoring-endodontically-treated-incisors-an-in-vitro-study
#15
P Magne, P C Lazari, M A Carvalho, T Johnson, A A Del Bel Cury
OBJECTIVES:  The aim of this study was to investigate the restoration of broken-down endodontically treated incisors with the ferrule effect using glass ceramic crowns bonded to composite resin core buildups with or without a fiber post. A no-ferrule group with post was also included for comparison. METHODS AND MATERIALS:  Thirty decoronated endodontically treated bovine incisors with a 2-mm ferrule were restored with a direct buildup using a nanohybrid direct composite resin (Miris 2 and Optibond FL) with or without a glass-fiber-reinforced post...
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402737/comparison-of-polymerization-shrinkage-physical-properties-and-marginal-adaptation-of-flowable-and-restorative-bulk-fill-resin-based-composites
#16
J H Jung, S H Park
PURPOSE: The purpose of this study was to compare the marginal adaptation of two flowable bulk fill resin-based composites (FB-RBCs), two restorative bulk fill resin-based composites (RB-RBCs), and one regular incremental-fill RBC in MOD cavities in vitro. Additionally, the influence of linear polymerization shrinkage, shrinkage force, flexural modulus, and bottom/top surface hardness ratio on the marginal adaptation was evaluated. METHODS: A Class II MOD cavity was prepared in 40 extracted sound lower molars...
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402736/characterization-of-a-diamond-ground-y-tzp-and-reversion-of-the-tetragonal-to-monoclinic-transformation
#17
L M Candido, Lmg Fais, E B Ferreira, S G Antonio, Lap Pinelli
PURPOSE: To characterize the surface of an yttria-stabilized zirconia (Y-TZP) ceramic after diamond grinding in terms of its crystalline phase, morphology, mean roughness (Ra), and wettability as well as to determine a thermal treatment to reverse the resulting tetragonal to monoclinic (t-m) transformation. METHODS AND MATERIALS: Y-TZP specimens were distributed into different groups according to the actions (or no action) of grinding and irrigation. Grinding was accomplished using a diamond stone at a low speed...
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402735/microhardness-and-roughness-of-infiltrated-white-spot-lesions-submitted-to-different-challenges
#18
É Y Neres, M D Moda, E K Chiba, Alf Briso, J P Pessan, T C Fagundes
A white spot lesion is the first clinical sign of a caries lesion and represents mineral loss from the enamel subsurface. The purpose of this study was to evaluate the microhardness and surface roughness of white spot lesions after application of a resin infiltrant and subjection to different challenges. Caries-like lesions were induced in bovine enamel discs (n=50), and the specimens were randomly divided into five study groups (n=10): demineralized enamel (negative control, G1), infiltrated enamel (G2), infiltrated enamel submitted to brushing (G3), infiltrated enamel submitted to pH cycling (G4), and infiltrated enamel submitted to artificial aging (G5)...
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402734/masking-colored-substrates-using-monolithic-and-bilayer-cad-cam-ceramic-structures
#19
G R Basso, A B Kodama, A H Pimentel, M R Kaizer, A Della Bona, R R Moraes, N Boscato
OBJECTIVE:  To evaluate the masking ability and translucency of monolithic and bilayer CAD-CAM ceramic structures. METHODS:  Discs of high translucency (HT) and low translucency (LT) lithium disilicate-based ceramic (IPS e.max CAD) with different thicknesses (0.7, 1, 1.5, and 2 mm) were evaluated as a monolithic structure or combined (bilayer) with a 0.5-mm-thick zirconia framework (IPS e.max ZirCAD). The masking ability and translucency were calculated based on CIE L*a*b* color coordinates measured with a spectrophotometer (SP60, X-Rite)...
July 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402733/effect-of-surface-treatment-silane-and-universal-adhesive-on-microshear-bond-strength-of-nanofilled-composite-repairs
#20
I A Fornazari, I Wille, E M Meda, R T Brum, E M Souza
PURPOSE:  The aim of this study was to evaluate the effect of surface treatment and universal adhesive on the microshear bond strength of nanoparticle composite repairs. METHODS:  One hundred and forty-four specimens were built with a nanofilled composite (Filtek Supreme Ultra, 3M ESPE). The surfaces of all the specimens were polished with SiC paper and stored in distilled water at 37°C for 14 days. Half of the specimens were then air abraded with Al2O3 particles and cleaned with phosphoric acid...
July 2017: Operative Dentistry
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