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https://www.readbyqxmd.com/read/27896210/comparison-of-the-bonding-strengths-of-second-and-third-generation-light-emitting-diode-light-curing-units
#1
Hee-Min Lee, Sang-Cheol Kim, Kyung-Hwa Kang, Na-Young Chang
OBJECTIVE: With the introduction of third-generation light-emitting diodes (LEDs) in dental practice, it is necessary to compare their bracket-bonding effects, safety, and efficacy with those of the second-generation units. METHODS: In this study, 80 extracted human premolars were randomly divided into eight groups of 10 samples each. Metal or polycrystalline ceramic brackets were bonded on the teeth using second- or third-generation LED light-curing units (LCUs), according to the manufacturers' instructions...
November 2016: Korean Journal of Orthodontics
https://www.readbyqxmd.com/read/27894527/accuracy-and-mechanical-properties-of%C3%A2-orthodontic-models-printed-3-dimensionally-from-calcium-sulfate-before-and-after-various-postprinting-treatments
#2
Austin D Ledingham, Jeryl D English, Sercan Akyalcin, Benjamin E Cozad, Joe C Ontiveros, F Kurtis Kasper
INTRODUCTION: Dental models fabricated with 3-dimensional printing technologies are revolutionizing the practice of orthodontics, but they generally comprise polymeric materials that may not be suitable for certain applications, such as soldering appliances. The objective of this study was to investigate the dimensional accuracy and mechanical properties of 3-dimensional printed ceramic-based models before and after various treatments intended to improve their mechanical properties. METHODS: Thirty identical models were printed 3-dimensionally from a calcium sulfate-based substrate and divided into 3 groups for treatment: high heat (250°C for 30 minutes), low heat (150°C for 30 minutes), and Epsom salt treatment...
December 2016: American Journal of Orthodontics and Dentofacial Orthopedics
https://www.readbyqxmd.com/read/27894520/corrigendum-to-all-ceramic-or-metal-ceramic-tooth-supported-fixed-dental-prostheses-fdps-a-systematic-review-of-the-survival-and-complication-rates-part-ii-multiple-unit-fdps-dental-materials-31-6-2015-624-639
#3
Bjarni Elvar Pjetursson, Irena Sailer, Nikolay Alexandrovich Makarov, Marcel Zwahlen, Daniel Stefan Thoma
No abstract text is available yet for this article.
November 25, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27892839/influence-of-adhesive-type-and-placement-technique-on-postoperative-sensitivity-in-posterior-composite-restorations
#4
Trf Costa, M Rezende, A Sakamoto, B Bittencourt, P Dalzochio, A D Loguercio, A Reis
PURPOSE: This double blind, randomized clinical trial compared the postoperative sensitivity of the placement technique (incremental and bulk fill) in posterior composite resin restorations bonded with two different adhesive strategies (self-etch and etch-and-rinse). METHODS: Posterior dental cavities of 72 participants (n=236), with a cavity depth of at least 3 mm, were randomly divided into four groups. The restorations were bonded using either the etch-and-rinse Tetric N-Bond (Ivoclar Vivadent) or the self-etch Tetric N-Bond SE (Ivoclar Vivadent)...
November 28, 2016: Operative Dentistry
https://www.readbyqxmd.com/read/27892564/zirconia-based-dental-ceramics-structure-mechanical-properties-biocompatibility-and-applications
#5
Chandkiram Gautam, Jarin Joyner, Amarendra Gautam, Jitendra Rao, Robert Vajtai
Zirconia (ZrO2) based dental ceramics have been considered to be advantageous materials with adequate mechanical properties for the manufacturing of medical devices. Due to its very high compression strength of 2000 MPa, ZrO2 can resist differing mechanical environments. During the crack propagation on the application of stress on the surface of ZrO2, a crystalline modification diminishes the propagation of cracks. In addition, zirconia's biocompatibility has been studied in vivo, leading to the observation of no adverse response upon the insertion of ZrO2 samples into the bone or muscle...
November 28, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/27890356/does-8-methacryloxyoctyl-trimethoxy-silane-8-mots-improve-initial-bond-strength-on-lithium-disilicate-glass-ceramic
#6
Yukinori Maruo, Goro Nishigawa, Kumiko Yoshihara, Shogo Minagi, Takuya Matsumoto, Masao Irie
OBJECTIVES: Dental ceramic surfaces are modified with silane coupling agents, such as γ-methacryloxypropyl trimethoxy silane (γ-MPTS), to improve bond strength. For bonding between lithium disilicate glass ceramic and resin cement, the objective was to investigate if 8-methacryloxyoctyl trimethoxy silane (8-MOTS) could yield a similar performance as the widely used γ-MPTS. METHODS: One hundred and ten lithium disilicate glass ceramic specimens were randomly divided into 11 groups (n=10) according to pretreatment regime...
November 24, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27890354/chairside-cad-cam-materials-part-1-measurement-of-elastic-constants-and-microstructural-characterization
#7
Renan Belli, Michael Wendler, Dominique de Ligny, Maria Rita Cicconi, Anselm Petschelt, Herwig Peterlik, Ulrich Lohbauer
OBJECTIVE: A deeper understanding of the mechanical behavior of dental restorative materials requires an insight into the materials elastic constants and microstructure. Here we aim to use complementary methodologies to thoroughly characterize chairside CAD/CAM materials and discuss the benefits and limitations of different analytical strategies. METHODS: Eight commercial CAM/CAM materials, ranging from polycrystalline zirconia (e.max ZirCAD, Ivoclar-Vivadent), reinforced glasses (Vitablocs Mark II, VITA; Empress CAD, Ivoclar-Vivadent) and glass-ceramics (e...
November 24, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27884403/chairside-cad-cam-materials-part-2-flexural-strength-testing
#8
Michael Wendler, Renan Belli, Anselm Petschelt, Daniel Mevec, Walter Harrer, Tanja Lube, Robert Danzer, Ulrich Lohbauer
OBJECTIVE: Strength is one of the preferred parameters used in dentistry for determining clinical indication of dental restoratives. However, small dimensions of CAD/CAM blocks limit reliable measurements with standardized uniaxial bending tests. The objective of this study was to introduce the ball-on-three-ball (B3B) biaxial strength test for dental for small CAD/CAM block in the context of the size effect on strength predicted by the Weibull theory. METHODS: Eight representative chairside CAD/CAM materials ranging from polycrystalline zirconia (e...
November 21, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/27881326/minimally-invasive-prosthetic-restoration-of-posterior-tooth-loss-with-resin-bonded-wing-retained-and-inlay-retained-fixed-dental-prostheses-fabricated-from-monolithic-zirconia-a-clinical-report-of-two-patients
#9
Wolfgang Bömicke, Jochen Karl, Peter Rammelsberg
The esthetics and biocompatibility of ceramic resin-bonded fixed dental prostheses (RBFDPs) are regarded as better than those of their metal ceramic counterparts. However, a high incidence of complications in the posterior arches of ceramic RBFDPs initiated a process of continuous and evolving design development. This clinical report describes 2 successful restorations of a missing posterior tooth with monolithic zirconia RBFDPs with 2 different retainer designs: retentively prepared adhesive wings and inlays...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27881319/influence-of-remaining-tooth-structure-and-restorative-material-type-on-stress-distribution-in-endodontically-treated-maxillary-premolars-a-finite-element-analysis
#10
Junxin Zhu, Qiguo Rong, Xiaoyan Wang, Xuejun Gao
STATEMENT OF PROBLEM: How tooth preparation and material type affect the stress distribution of endodontically treated teeth restored with endocrowns remains unclear. PURPOSE: The purpose of this finite element (FE) study was to determine the influence of the quantity of remaining dental tissues and material type on stress distribution in endodontically treated maxillary premolars using 3-dimensional FE analysis. MATERIAL AND METHODS: Five 3-dimensional FE models were constructed on the basis of the restorative methods used and the quantity of preserved tooth tissues: a sound maxillary premolar, an endodontically treated maxillary premolar restored with composite resin, and endodontically treated maxillary premolars restored with endocrowns with thicknesses of 1...
October 27, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27880023/effect-of-cyclic-fatigue-tests-on-aging-and-their-translational-implications-for-survival-of-all-ceramic-tooth-borne-single-crowns-and-fixed-dental-prostheses
#11
REVIEW
Mutlu Özcan, Moritz Jonasch
PURPOSE: The objective of this systematic review was to elaborate the aging effect of cyclic fatigue tests on mechanical durability of all-ceramic single crowns and fixed dental prostheses (FDP). MATERIALS AND METHODS: Original scientific papers published in the MEDLINE (PubMed) database in English between 01/01/1950 and 12/31/2013 on cyclic loading on all-ceramics were included in this systematic review. The following MeSH terms, search terms, and their combinations were used: "in vitro," "stress mechanical," "crowns," "denture, partial, fixed," "dentistry," "fatigue," "all-ceramic," "zirconia," "fixed dental prosthesis," "FDP," "bridges," and "cyclic loading...
November 23, 2016: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/27875055/intraoral-repair-of-a-glass-ceramic-restoration-with-nanohybrid-ormocers-a-case-report
#12
Juergen Manhart, Iris Frasheri
The interest in repairing failed restorations has been growing; such a procedure may prolong the life span of defective direct and indirect dental restorations. The intraoral repair using resin-based composite materials has major benefits, as it preserves the main body of the restoration, avoids unnecessary removal of sound tooth structure, is an easy and fast treatment, avoids additional appointments, and is inexpensive. This case report demonstrates the use of nanohybrid Ormocer®, or organically modified ceramic, materials...
November 2016: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/27875051/clinical-significance-of-bis-gma-and-hema-orthodontic-resins-bonding-to-enamel-and-ceramic-materials
#13
Timothy Reichheld, Gregory Monfette, Ronald D Perry, Matthew Finkelman, Eric Gheewalla, Gerard Kugel
The advancement of new ceramic materials for dental crowns has prompted the need for improved methods of bonding orthodontic brackets to these surfaces. Currently, lithium-disilicate is the primary material being used for anterior crowns, while zirconia is the primary material being used in the posterior. The purpose of this study was to compare the shear bond strength of HEMA (Assure® Universal Bonding Resin) and bis-GMA (Assure® PLUS All Surface Bonding Resin) orthodontic bonding resins on enamel, lithium-disilicate, and zirconia materials...
November 2016: Compendium of Continuing Education in Dentistry
https://www.readbyqxmd.com/read/27867109/towards-long-lasting-zirconia-based-composites-for-dental-implants-transformation-induced-plasticity-and-its-consequence-on-ceramic-reliability
#14
Helen Reveron, Marta Fornabaio, Paola Palmero, Tobias Fürderer, Erik Adolfsson, Vanni Lughi, Alois Bonifacio, Valter Sergo, Laura Montanaro, Jérôme Chevalier
: Zirconia-based composites were developed through an innovative processing route able to tune compositional and microstructural features very precisely. Fully-dense ceria-stabilized zirconia ceramics (84vol% Ce-TZP) containing equiaxed alumina (8vol%Al2O3) and elongated strontium hexa-aluminate (8vol% SrAl12O19) second phases were obtained by conventional sintering. This work deals with the effect of the zirconia stabilization degree (CeO2 in the range 10.0-11.5 mol%) on the transformability and mechanical properties of Ce-TZP-Al2O3-SrAl12O19 materials...
November 17, 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27861648/fracture-resistance-of-straight-and-angulated-zirconia-implant-abutments-supporting-anterior-three-unit-lithium-disilicate-fixed-dental-prostheses
#15
Samah Saker, Sameh El-Shahat, Mohamed Ghazy
PURPOSE: The purpose of this study was to evaluate fracture resistance of straight and angulated zirconia implant abutments supporting anterior three-unit lithium disilicate fixed dental prostheses (FDPs). MATERIALS AND METHODS: Four different test groups (n = 8) representing anterior three-unit implant-supported all-ceramic FDPs were fabricated to fit an in vitro model with two implants. Groups 1 and 2 simulated a clinical situation with an ideal implant position for maxillary left central and right lateral incisors from a prosthetic point of view, which allowed for the use of a straight, prefabricated zirconia and titanium abutment...
November 2016: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/27859654/promotion-of-resin-bonding-to-dental-zirconia-ceramic-using-plasma-deposition-of-tetramethylsilane-and-benzene
#16
Geum-Jun Han, Jae-Hoon Kim, Byeong-Hoon Cho, Kyu-Hwan Oh, Je-Jun Jeong
The aim of this study was to investigate the effects of plasma-enhanced deposition of an organosilane and benzene on resin bonding to a dental zirconia ceramic. A total of 70 zirconia specimens, which were polished before sintering, were randomly divided into five groups according to surface treatments before applying a dental adhesive (each group, n = 14): group 1, no previous treatment (control); group 2, plasma deposition with tetramethylsilane (TMS); group 3, plasma deposition with benzene; group 4, sequential plasma deposition with TMS and benzene; and group 5, a zirconia primer (Z-Prime Plus)...
November 16, 2016: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/27857514/the-use-of-bioceramics-in-endodontics-literature-review
#17
REVIEW
Stefan Jitaru, Ioana Hodisan, Lucia Timis, Anamaria Lucian, Marius Bud
BACKGROUND AND AIM: Bioceramics are ceramic compounds obtained both in situ and in vivo, by various chemical processes. Bioceramics exhibit excellent biocompatibility due to their similarity with biological materials, like hydroxyapatite. Bioceramics and multi-substituted hydroxyapatite or similar compounds have the ability to induce a regenerative response in the organism. The aim of this paper is to make a literature review on the main bioceramic materials currently used in endodontics and on their specific characteristics...
2016: Clujul Medical (1957)
https://www.readbyqxmd.com/read/27836147/effect-of-artificial-toothbrushing-and-water-storage-on-the-surface-roughness-and-micromechanical-properties-of-tooth-colored-cad-cam-materials
#18
Simon Flury, Elisabeth Diebold, Anne Peutzfeldt, Adrian Lussi
STATEMENT OF PROBLEM: Because of the different composition of resin-ceramic computer-aided design and computer-aided manufacturing (CAD-CAM) materials, their polishability and their micromechanical properties vary. Moreover, depending on the composition of the materials, their surface roughness and micromechanical properties are likely to change with time. PURPOSE: The purpose of this in vitro study was to investigate the effect of artificial toothbrushing and water storage on the surface roughness (Ra and Rz) and the micromechanical properties, surface hardness (Vickers [VHN]) and indentation modulus (EIT), of 5 different tooth-colored CAD-CAM materials when polished with 2 different polishing systems...
November 14, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27832968/fifteen-year-survival-of-anterior-all-ceramic-cantilever-resin-bonded-fixed-dental-prostheses
#19
Matthias Kern
PURPOSE: The aim of this follow-up study was to report the long-term outcome of all-ceramic cantilever resin-bonded fixed dental prostheses (RBFDPs). MATERIALS AND METHODS: In 16 patients (mean age of 33.3±17.5years) 22 RBFDPs made from a glass-infiltrated alumina ceramic (In-Ceram) were inserted with a phosphate monomer containing luting agent after air-abrasion of the retainer wings. The abutment preparation included a shallow groove on the cingulum and a small proximal box...
November 8, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/27824975/analysis-of-endodontic-complications-following-fixed-prosthodontic-rehabilitation
#20
Zeynep Uzgur, Recep Uzgur, Hakan Çolak, Ertuğrul Ercan, Mehmet Dallı
PURPOSE: The aim of this study was to determine endodontic treatment needs and types of endodontic disease following fixed prosthodontic treatment 24 hours after tooth preparation, 1 week after tooth preparation, 1 month after placement, and 6 months after placement. MATERIALS AND METHODS: Study groups consisted of patients who attended a university dental hospital department of prosthodontics for fixed prosthodontic treatment from January 2011 to December 2013...
November 2016: International Journal of Prosthodontics
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