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https://www.readbyqxmd.com/read/28386488/esthetic-reconstruction-of-diastema-with-adhesive-tooth-colored-restorations-and-hyaluronic-acid-fillers
#1
Supawadee Naorungroj
Objective. This report presents a comprehensive esthetic treatment with adhesive tooth-colored restorations in a combination with hyaluronic acid (HA) fillers of diastema in an orthodontic patient with relapse. Case Report. A 36-year-old female patient consulted about 1.5-2 mm midline diastema after an orthodontic relapse of replacing missing central incisors with lateral incisors and dark-colored gingival tissue as a result of a metal post and core with porcelain fused to a metal (PFM) crown at the left lateral incisor...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28356189/longevity-of-fiber-reinforced-composite-fixed-partial-dentures-frc-fpd-systematic-review
#2
REVIEW
Khaled E Ahmed, Kar Yan Li, Colin A Murray
OBJECTIVES: to assess FRC FPDs longevity through systematically reviewing contemporary clinical evidence. Population investigated comprised patients requiring replacement of a single missing anterior/posterior tooth. Intervention was FRC FPDs. No control/comparison selected. Outcome was longevity of FRC FPDs. The focus question was: 'What is the longevity of FRC FPDs used to replace one anterior or posterior tooth in patients?' DATA: Randomised, non-randomised, controlled, prospective and retrospective clinical studies were included...
September 3, 2016: Journal of Dentistry
https://www.readbyqxmd.com/read/28259023/effects-of-build-orientation-and-element-partitioning-on-microstructure-and-mechanical-properties-of-biomedical-ti-6al-4v-alloy-produced-by-laser-sintering
#3
P Mengucci, A Gatto, E Bassoli, L Denti, F Fiori, E Girardin, P Bastianoni, B Rutkowski, A Czyrska-Filemonowicz, G Barucca
Direct Metal Laser Sintering (DMLS) technology was used to produce tensile and flexural samples based on the Ti-6Al-4V biomedical composition. Tensile samples were produced in three different orientations in order to investigate the effect of building direction on the mechanical behavior. On the other hand, flexural samples were submitted to thermal treatments to simulate the firing cycle commonly used to veneer metallic devices with ceramics in dental applications. Roughness and hardness measurements as well as tensile and flexural mechanical tests were performed to study the mechanical response of the alloy while X-ray diffraction (XRD), electron microscopy (SEM, TEM, STEM) techniques and microanalysis (EDX) were used to investigate sample microstructure...
February 24, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28216846/three-dimensional-finite-element-analysis-of-the-stress-distribution-pattern-in-a-mandibular-first-molar-tooth-restored-with-five-different-restorative-materials
#4
Kathleen Manuela D'souza, Meena Ajay Aras
INTRODUCTION: Badly broken or structurally compromised posterior teeth are frequently associated with crown/root fracture. Numerous restorative materials have been used to fabricate indirect full-coverage restorations for such teeth. This study aims to evaluate and compare the effect of restorative materials on the stress distribution pattern in a mandibular first molar tooth, under varying loading conditions and to compare the stress distribution pattern in five commonly used indirect restorative materials...
January 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28212978/a-systematic-review-of-the-survival-and-complication-rates-of-inlay-retained-fixed-dental-prostheses
#5
REVIEW
Junyu Chen, He Cai, Lai Suo, Yiyuan Xue, Jian Wang, Qianbing Wan
OBJECTIVES: The aim of this systematic review was to investigate the survival and complication rates of inlay-retainer fixed dental prostheses (IRFDPs). DATA/SOURCES: A systematic search was conducted in the PubMed, EMBASE, and Cochrane Library databases in English and time filters (articles published from 1960) were used. STUDY SELECTION: Randomized controlled trails (RCTs), controlled clinical trials (CCTs) and prospective cohort studies on IRFDPs with a mean follow-up period of at least 2 years were included...
February 23, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28190816/fracture-resistance-of-zirconia-composite-veneered-crowns-in-comparison-with-zirconia-porcelain-crowns
#6
Omar Alsadon, David Patrick, Anthony Johnson, Sarah Pollington, Duncan Wood
The objectives were to evaluate the fracture resistance and stress concentration in zirconia/composite veneered crowns in comparison to zirconia/porcelain crowns using occlusal fracture resistance and by stress analysis using finite element analysis method. Zirconia substructures were divided into two groups based on the veneering material. A static load was applied occlusally using a ball indenter and the load to fracture was recorded in Newtons (N). The same crown design was used to create 3D crown models and evaluated using FEA...
February 11, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28185678/in-vitro-fatigue-and-fracture-testing-of-cad-cam-materials-in-implant-supported-molar-crowns
#7
Verena Preis, Sebastian Hahnel, Michael Behr, Laila Bein, Martin Rosentritt
OBJECTIVE: To investigate the fatigue and fracture resistance of different CAD/CAM-materials as implant- or tooth-supported molar crowns with respect to the clinical procedure (screwed/bonded restoration). METHODS: 168 crowns were fabricated from different CAD/CAM-materials (n=8/material): ZLS (zirconia-reinforced lithium silicate ceramic; Suprinity, Vita-Zahnfabrik), COB (composite; Brilliant Crios, Coltene), COL (composite; Lava Ultimate, 3M Espe), PMV/PPV (polyether ether ketone (PEEK)+milled composite veneer/composite paste veneer; BioHPP+HIPC veneer/Crealign veneer, Bredent), COH (composite; Block HC, Shofu), and ZIR (zirconia; IPS e...
April 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28128236/ruthenium-isotopic-evidence-for-an-inner-solar-system-origin-of-the-late-veneer
#8
Mario Fischer-Gödde, Thorsten Kleine
The excess of highly siderophile elements in the Earth's mantle is thought to reflect the addition of primitive meteoritic material after core formation ceased. This 'late veneer' either comprises material remaining in the terrestrial planet region after the main stages of the Earth's accretion, or derives from more distant asteroidal or cometary sources. Distinguishing between these disparate origins is important because a late veneer consisting of carbonaceous chondrite-like asteroids or comets could be the principal source of the Earth's volatiles and water...
January 25, 2017: Nature
https://www.readbyqxmd.com/read/28117854/effectiveness-of-optical-illusions-%C3%A2-applied-on-a-single-composite-resin-veneer-for-the-diastema-closure-%C3%A2-of-maxillary-central-incisors
#9
Thomai Katsarou, Maria Antoniadou, Efstratios Papazoglou
OBJECTIVE: To assess the esthetic effectiveness of four illusion techniques applied to a composite resin veneer for diastema closure between maxillary central incisors. MATERIALS AND METHODS: An acrylic model with six natural maxillary anterior teeth was fabricated with a 2-mm diastema between the central incisors. Resin veneers were constructed on the left central incisor and the following cases were derived: V0: no veneer; V1: veneer without optical illusion features; V2: veneer with centralized interproximal ridges; V3: veneer with curved incisal edges; V4: veneer with gray pigment mesially/distally; V5: veneer with gray pigment on the developmental lobes...
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28117852/a-new-veneer-technique-with-%C3%A2-prefabricated-composite-denture-teeth-combined-with-the-biologically-oriented-preparation-technique-bopt-a-case-report
#10
Piero Parisini, Luca Braccini, Ivo Krejci
This clinical report describes the step-by-step protocol for novel, 100% non-prep, custom-modified, prefabricated composite veneer restorations in the case of an esthetic rehabilitation of a patient presenting peg-shaped lateral incisors and undersized maxillary central incisors. A correct diagnosis, comprehensive treatment plan, and an interdisciplinary approach are necessary to obtain optimal conservative and predictable esthetic results.
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28106935/effects-of-luting-composites-on-the-resultant-colors-of-ceramic-veneers-to-intended-shade-tab
#11
Qing Li
PURPOSE: To investigate the color differences of ceramic veneers and the intended shade tab, and evaluate the effects of luting composites on the resultant colors of ceramic veneers. MATERIALS AND METHODS: Pressable leucite-reinforced feldspathic ceramic discs (IPS e.max), with nominal shade A3, were fabricated with thicknesses of 1.0 mm, 0.7 mm, and 0.5 mm (n = 10/ thickness). The ceramic specimens were cemented onto a composite background (shade Dentin) using a veneer adhesive system with five colors of luting composites (RelyX)...
January 20, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28072486/radiopacity-of-composite-luting-cements-using-a-digital-technique
#12
Walter Dukic
PURPOSE: The aim of this in vitro study was to evaluate the radiopacity of 20 common dental composite luting materials using a digital technique. MATERIALS AND METHODS: A 1-mm-thick specimen of each material with a human tooth slice and aluminium step wedge were tested using digital radiographs under four combinations of exposure and voltage. The radiopacity in pixels was determined using computer software. The equivalent thickness of aluminium for each material was then calculated based on the calibration curve...
January 10, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28070702/effects-of-tributylborane-activated-adhesive-and-two-silane-agents-on-bonding-computer-aided-design-and-manufacturing-cad-cam-resin-composite
#13
Ayano Shinohara, Yohsuke Taira, Takashi Sawase
The present study was conducted to evaluate the effects of an experimental adhesive agent [methyl methacrylate-tributylborane liquid (MT)] and two adhesive agents containing silane on the bonding between a resin composite block of a computer-aided design and manufacturing (CAD/CAM) system and a light-curing resin composite veneering material. The surfaces of CAD/CAM resin composite specimens were ground with silicon-carbide paper, treated with phosphoric acid, and then primed with either one of the two silane agents [Scotchbond Universal Adhesive (SC) and GC Ceramic Primer II (GC)], no adhesive control (Cont), or one of three combinations (MT/SC, MT/GC, and MT/Cont)...
January 9, 2017: Odontology
https://www.readbyqxmd.com/read/27987657/influence-of-interlayer-design-on-residual-thermal-stresses-in-trilayered-and-graded-all-ceramic-restorations
#14
Bruno Henriques, Douglas Fabris, Júlio C M Souza, Filipe S Silva, Joana Mesquita-Guimarães, Yu Zhang, Márcio Fredel
Residual thermal stresses are formed in dental restorations during cooling from high temperature processing. The aim of this study was to evaluate the influence of constructive design variables (composition and interlayer thickness) on residual stresses in alumina- and zirconia-graded restorations. Restorations' real-like cooling conditions were simulated using finite elements method and temperature-dependent material properties were used. Three different designs were evaluated: a bilayered restoration (sharp transition between materials); a trilayered restoration with a homogenous interlayer between core and veneer; and a trilayered restoration with a graded interlayer...
February 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/27982228/effect-of-glaze-cooling-rate-on-mechanical-properties-of-conventional-and-pressed-porcelain-on-zirconia
#15
Diogo Longhini, Cibele Oliveira de Melo Rocha, Igor Studart Medeiros, Renata Garcia Fonseca, Gelson Luis Adabo
The aim of this study was to characterize a conventional and a pressed porcelain for zirconia core as to biaxial flexural strength (BFS), apparent fracture toughness (FT) and microstructure composition, and to investigate the effect of glaze cooling rate on the BFS of the zirconia/porcelain bilayers. Monolayers of conventional porcelain Vita VM9 and pressed porcelain Vita PM9 (n=15) (12 mm diameter x 1.2 mm thick) were prepared for the BFS test (MPa). Apparent fracture toughness (MPa.m1/2) was measured by indentation technique (n=15)...
September 2016: Brazilian Dental Journal
https://www.readbyqxmd.com/read/27957283/treatment-and-restoration-of-adult-dentoalveolar-trauma-a-clinical-case-report
#16
Blanca Serra-Pastor, Miguel Penarrocha-Diago, María Penarrocha-Diago, Rubén Agustín-Panadero
Adult dentoalveolar trauma most often occurs in the context of sports activities and traffic accidents. Coronal fractures are the most common type of lesion, followed by tooth luxation. We present the case of a 25-year-old woman who suffered alveolar bone damage and coronal fractures of the upper incisors, with extrusive luxation of the right central incisor, as the result of a fall. On the first visit, manual reduction of the buccal plate was carried out under local anesthesia, with repositioning of the right central incisor and splinting to the neighboring teeth...
December 2016: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/27836148/volumetric-shrinkage-and-film-thickness-of-cementation-materials-for-veneers-an-in%C3%A2-vitro-3d-microcomputed-tomography-analysis
#17
Camila S Sampaio, João Malta Barbosa, Eduardo Cáceres, Lindiane C Rigo, Paulo G Coelho, Estevam A Bonfante, Ronaldo Hirata
STATEMENT OF PROBLEM: Few studies have investigated the volumetric polymerization shrinkage and film thickness of the different cementation techniques used to cement veneers. PURPOSE: The purpose of this in vitro study was to evaluate the volumetric polymerization shrinkage (VS) and film thickness (FT) of various cementation techniques through 3-dimensional (3D) microcomputed tomography (μCT). MATERIAL AND METHODS: Forty-eight artificial plastic maxillary central incisors with standard preparations for veneers were provided by a mannequin manufacturer (P-Oclusal) and used as testing models with the manufacturer's plastic veneers...
November 8, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27820690/multidisciplinary-treatment-of-complicated-crown-root-fractures-a-case-study
#18
I L Stojanac, B V Bajkin, M T Premovic, B D Ramic, L M Petrovic
Traumatic dental injuries usually occur among children and adolescents, with maxillary central incisors as the most often affected teeth. Complicated crown-root fractures are particularly challenging for esthetic and functional rehabilitation and often require a multidisciplinary approach. A 21-year-old male patient came to the Dental Clinic due to fractured maxillary incisors caused by trauma during a sporting activity. Clinical examination revealed horizontal fractures of teeth 7, 8, and 9, initiating in the labial cervical third and extending subgingivally on the palate, with exposed pulp tissues...
November 2016: Operative Dentistry
https://www.readbyqxmd.com/read/27765396/prospective-cohort-clinical-study-assessing-the-5-year-survival-and-success-of-anterior-maxillary-zirconia-based-crowns-with-customized-zirconia-copings
#19
Sami Dogan, Ariel J Raigrodski, Hai Zhang, Lloyd A Mancl
STATEMENT OF PROBLEM: Studies evaluating anterior zirconia-based crowns are limited. PURPOSE: The purpose of this prospective cohort clinical study was to assess the efficacy of zirconia-based anterior maxillary crowns with 0.3-mm customized copings at the cervical third and anatomical design elsewhere for up to 5 years of service. MATERIAL AND METHODS: Eighteen participants who required an anterior maxillary crown (n=20) and who had signed a consent form approved by the University of Washington Health Sciences Center Human Subjects Division were enrolled...
February 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/27730217/minimally-invasive-vertical-preparation-design-for-ceramic-veneers
#20
Mario Imburgia, Angelo Canale, Davide Cortellini, Marco Maneschi, Claudio Martucci, Marco Valenti
The esthetic treatment of anterior teeth has always presented a challenge in clinical practice. With the improvement of dental materials, many restorative options such as composite resins, all-ceramic crowns, and ceramic veneers have become available. The current challenge in reconstructive dentistry is to obtain excellent esthetic results while preserving the biological structures involved as much as possible. Thanks to the introduction of high-strength etchable dental ceramics, clinicians and technicians have materials and procedures at their disposal that allow them to restore esthetics and function through a minimally invasive approach...
2016: International Journal of Esthetic Dentistry
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