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Operative Dentistry

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https://www.readbyqxmd.com/read/28402738/ferrule-effect-dominates-over-use-of-a-fiber-post-when-restoring-endodontically-treated-incisors-an-in-vitro-study
#1
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...
April 12, 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
#2
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...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402736/characterization-of-a-diamond-ground-y-tzp-and-reversion-of-the-tetragonal-to-monoclinic-transformation
#3
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...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402735/microhardness-and-roughness-of-infiltrated-white-spot-lesions-submitted-to-different-challenges
#4
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)...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402734/masking-colored-substrates-using-monolithic-and-bilayer-cad-cam-ceramic-structures
#5
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)...
April 12, 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
#6
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...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402732/different-methods-for-inlay-production-effect-on-internal-and-marginal-adaptation-adjustment-time-and-contact-point
#7
M P Rippe, C Monaco, L Volpe, M A Bottino, R Scotti, L F Valandro
The aim of this study was to evaluate the effect of different production methods of resin and ceramic inlays on marginal and internal adaptation, adjustment time, and proximal contacts. Forty premolars were selected, embedded (their roots), and prepared to receive inlays that were made as follows (n=10): LaRe-digital impression with a Lava C.O.S. scanner, followed by milling of Lava Ultimate block (composite resin) in a milling center; CeRe-digital impression with a Cerec 3D Bluecam scanner, followed by milling of Lava Ultimate block in Cerec; CeDis-digital impression with a Cerec 3D Bluecam scanner, followed by milling of IPS e...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402731/characterization-of-inorganic-filler-content-mechanical-properties-and-light-transmission-of-bulk-fill-resin-composites
#8
B M Fronza, Apa Ayres, R R Pacheco, F A Rueggeberg, Cts Dias, M Giannini
OBJECTIVES: The aims of this study were to characterize inorganic content (IC), light transmission (LT), biaxial flexural strength (BFS), and flexural modulus (FM) of one conventional (layered) and four bulk-fill composites at different depths. METHODS: Bulk-fill composites tested were Surefil SDR flow (SDR), Filtek Bulk Fill (FBF), Tetric EvoCeram Bulk Fill (TEC), and EverX Posterior (EXP). Herculite Classic (HER) was used as a control. Energy dispersive x-ray analysis and scanning electron microscopy were used to characterize filler particle composition and morphology...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28402730/light-emitting-diode-beam-profile-and-spectral-output-influence-on-the-degree-of-conversion-of-bulk-fill-composites
#9
M G Rocha, Dcrs de Oliveira, I C Correa, L Correr-Sobrinho, Mac Sinhoreti, J L Ferracane, A B Correr
OBJECTIVES: To evaluate the beam profile and the spectral output of monowave and polywave light-emitting diodes (LEDs) and their influence on the degree of conversion (DC) of bulk fill composites. METHODS: A monowave LED (Smartlite Focus, Dentsply) and a polywave LED (Valo Cordless, Ultradent) were characterized using a resin calibrator and a laser beam profile analyzer. Two bulk fill composites, Sonic Fill 2 (SF) containing camphorquinone (CQ) and Tetric EvoCeram Bulk Fill (TEB) containing CQ associated with alternative photoinitiators, were placed in custom-designed molds (n=3) and photoactivated by the monowave or polywave LED with 20 J/cm(2)...
April 12, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28157419/chemical-interaction-analysis-of-an-adhesive-containing-10-methacryloyloxydecyl-dihydrogen-phosphate-10-mdp-with-the-dentin-in-noncarious-cervical-lesions
#10
Bmb Oliveira, Alm Ulbaldini, F Sato, M L Baesso, A C Bento, Lhc Andrade, S M Lima, R C Pascotto
The purpose of this study was to evaluate the chemical bonds of a self-etch 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) adhesive to natural noncarious cervical lesions (NCCLs) and compare them with those occurring in sclerotic dentin in artificially prepared defects (APDs). Four human teeth with natural NCCLs on the buccal surface were selected. Artificial defects matching the natural lesions were prepared on the lingual surface of the same teeth serving as control. Micro-Raman (MR) spectroscopy was used to quantify mineral content in natural NCCLs and in APDs...
February 3, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28157418/whitening-efficacy-of-whitening-mouth-rinses-used-alone-or-in-conjunction-with-carbamide-peroxide-home-whitening
#11
Jbs Oliveira, R S Sarlo, E Bresciani, Tmf Caneppele
OBJECTIVES: The aim of this study was to compare the effectiveness of whitening mouth rinses on teeth previously whitened or not, exposed to food dyes. METHODS AND MATERIALS: One hundred twenty enamel-dentin specimens, 3 mm in diameter, were obtained from bovine incisors. The specimens were stained for 14 days in staining broth. After staining, the initial color reading was performed via a spectrophotometer CM-2600d (Konica Minolta). Half of specimens were submitted to whitening (10% carbamide peroxide [CP]) for 14 days...
February 3, 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28257259/microleakage-and-shear-bond-strength-of-composite-restorations-under-cycling-conditions
#12
R F Zanatta, M Lungova, A B Borges, Crg Torres, H-G Sydow, A Wiegand
OBJECTIVES: The aim of this study was to evaluate microleakage and shear bond strength of composite restorations under different cycling conditions. METHODS AND MATERIALS: Class V cavities were prepared in the buccal and lingual surfaces of 30 human molars (n=60). A further 60 molars were used to prepare flat enamel and dentin specimens (n=60 each). Cavities and specimens were divided into six groups and pretreated with an adhesive (self-etch/Clearfil SE Bond or etch-and-rinse/Optibond FL)...
March 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28257258/fifteen-year-clinical-follow-up-of-restoration-of-extensive-cervical-resorption-in-a-maxillary-central-incisor
#13
E G Reston, Rpr Bueno, L Q Closs, J Zettermann
Internal bleaching in endodontically treated teeth requires care and protection to prevent harm to the periodontal ligament due to peroxide and may result in external root resorption. There is a myriad of treatment options when this occurs, such as monitoring, extraction, and subsequent rehabilitation with implants or fixed prosthodontics. In some cases, such as the one described here, a conservative attempt to maintain the tooth as a single structure can be made by sealing the resorptive defect. In the present case, we show a multidisciplinary approach where orthodontics, periodontics, and restorative dentistry were involved in treating the maxillary right central incisor (#8) of a 65-year-old patient with extensive cervical resorption, whose chief complaint was esthetics...
March 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28257256/biological-effects-of-provisional-resin-materials-on-human-dental-pulp-stem-cells
#14
S-K Jun, C Mahapatra, H-H Lee, H-W Kim, J-H Lee
OBJECTIVES: This study investigated the in vitro cytotoxicity as well as the proinflammatory cytokine expression of provisional resin materials on primary cultured human dental pulp stem cells (hDPSCs). METHODS: Five commercially available provisional resin materials were chosen (SNAP [SN], Luxatemp [LT], Jet [JE], Revotek LC [RL], and Vipi block [VB]). Eluates that were either polymerizing or already set were added to hDPSCs under serially diluted conditions divided into three different setting times (25% set, 50% set, and 100% set) and incubated for 24 hours with 2× concentrated culture media...
March 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28257255/republished-reviewer-list
#15
(no author information available yet)
No abstract text is available yet for this article.
March 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28257254/erratum
#16
(no author information available yet)
No abstract text is available yet for this article.
March 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28257253/president-s-award-barbara-young
#17
(no author information available yet)
No abstract text is available yet for this article.
March 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28257252/a-direct-refractory-die-technique-for-cast-gold-restorations
#18
C T Smith, K E Diefenderfer
Fabricating accurate cast gold restorations can be challenging for both clinicians and laboratory technicians. Removing the wax pattern from the master die often distorts the pattern, which, in turn, compromises the overall fit and marginal adaptation of the casting. This article demonstrates a laboratory technique in which the final restoration is cast directly on the refractory die without removing the wax pattern. Thus, distortion of the wax pattern is avoided, enabling the production of superbly fitting gold castings for both intracoronal and extracoronal restorations...
March 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28257251/interfacial-characteristics-and-bond-durability-of-universal-adhesive-to-various-substrates
#19
A Tsujimoto, W W Barkmeier, T Takamizawa, T M Wilwerding, M A Latta, M Miyazaki
OBJECTIVE: This study investigated the interfacial characteristics and bond durability of universal adhesives to various substrates. METHODS AND MATERIALS: Two universal adhesives were used: 1) Scotchbond Universal and 2) G-Premio Bond. The substrates used were bovine enamel and dentin with or without phosphoric acid etching, resin composite, lithium disilicate and leucite-reinforced glass ceramics, zirconia, and metal alloys. The surface free energy and the parameters of various substrates and of substrates treated by adhesive after light irradiation were determined by measuring the contact angles of three test liquids...
March 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28257250/ceramic-veneers-for-esthetic-restoration-of-retained-primary-teeth-a-4-year-follow-up-case-report
#20
M S Bin-Shuwaish
Retained primary teeth in the smile zone can cause patient dissatisfaction, especially if associated with malposition of teeth. Orthodontic and prosthetic treatment options to treat the situation may not be accepted by some patients. Therefore, these patients tend to maintain their primary teeth and seek different esthetic options. Ceramic veneers may provide an esthetic treatment option to restore these teeth. However, the survival rates of ceramic restorations in such cases have not yet been established. This case report provides a step-by-step clinical description of the use of ceramic veneers for the restoration of retained primary canines and mild teeth malalignment, with a 4-year follow-up report, in a 28-year-old female patient...
March 2017: Operative Dentistry
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