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https://www.readbyqxmd.com/read/29240213/minimally-invasive-treatment-of-an-ankylosed-severely-discolored-and-intruded-central-incisor-with-a-masking-ceramic-veneer-a-clinical-report
#1
Anja Liebermann, Daniel Edelhoff, Otto Prandtner, Reza Saeidi Pour
Dental therapy of traumatically ankylosed maxillary anterior teeth with an additional slight root resorption represents a great challenge for the restorative team and requires intensive planning and communication between patient, dentist, orthodontist, periodontist, and dental technician. The inhibition of vertical growth often makes dental intervention indispensable. Porcelain laminate veneers have been successfully used for more than two decades, mainly on anterior teeth, and was the minimally invasive treatment option for the present case report...
January 2018: International Journal of Periodontics & Restorative Dentistry
https://www.readbyqxmd.com/read/29238488/effect-of-hydrofluoric-acid-surface-treatments-on-micro-shear-bond-strength-of-cad-cam-ceramics
#2
Faraneh Mokhtarpour, Homayoon Alaghehmand, Soraya Khafri
Introduction: Dental ceramics are appreciated as highly esthetic restorative materials that can simulate the appearance of natural dentition better than other materials. The aim of this study was to evaluate the effect of hydrofluoric acid concentration and etching time on micro-shear bond strength (μSBS) to IPS e.max CAD and Vita Mark II of a dual cured resin cement (Panavia F2.0). Methods: This study was an experimental in vitro study, performed in the dental material research center of Babol University of Medical Sciences in 2016...
October 2017: Electronic Physician
https://www.readbyqxmd.com/read/29234747/flapless-vs-flapped-implant-insertion-in-patients-with-controlled-type-2-diabetes-subjected-to-delayed-loading-1-year-follow-up-results-from-a-randomised-controlled-trial
#3
Kaushal Kishor Agrawal, Jitendra Rao, Mohd Anwar, Kalpana Singh, D Himanshu
PURPOSE: To compare the outcome of dental implants placed following full-thickness flap surgery with flapless surgery in controlled type 2 diabetic patients. MATERIALS AND METHODS: A total of 92 controlled type 2 diabetic patients, who needed missing mandibular first molars to be replaced by implants, were selected for a single-centre, parallel group, double-blinded randomised controlled trial. Patients were randomly allocated into two groups: flap (46 patients) vs flapless (46 patients) implant placement...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/29234746/short-implants-as-an-alternative-to-crestal-sinus-lift-a-3-year-multicentre-randomised-controlled-trial
#4
Giorgio Gastaldi, Pietro Felice, Roberto Pistilli, Carlo Barausse, Anna Trullenque-Eriksson, Marco Esposito
PURPOSE: To evaluate the efficacy of short (5 or 6 mm long) dental implants vs 10 mm or longer implants placed in crestally lifted sinuses. MATERIALS AND METHODS: Twenty partially edentulous patients with 5 to 7 mm of residual crestal height and at least 7 mm thickness below the maxillary sinuses as measured on computed tomography scans were randomised according to a parallel group design to receive either one to two 5 or 6 mm long implants (10 patients) or 10 mm long implants (10 patients) after crestal sinus lifting and grafting with anorganic bovine bone...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/29234745/the-influence-of-repeated-abutment-changes-on-peri-implant-tissue-stability-3-year-post-loading-results-from-a-multicentre-randomised-controlled-trial
#5
Eriberto Bressan, Maria Gabriella Grusovin, Ferdinando D'Avenia, Konrad Neumann, Luca Sbricoli, Giuseppe Luongo, Marco Esposito
PURPOSE: To evaluate the influence of at least three abutment disconnections in conventional loaded implants against placement of a definitive abutment in immediately non-occlusal loaded implants on hard and soft tissue changes. A secondary aim was to evaluate whether the presence of less than 2 mm of keratinised mucosa is associated with increased peri-implant marginal bone loss and soft tissue recessions. MATERIALS AND METHODS: Eighty patients requiring one single crown or one fixed partial prosthesis supported by a maximum of three implants were randomised, after implants were placed with more than 35 Ncm, according to a parallel group design to receive definitive abutments that were loaded immediately (definitive abutment or immediate loading group) or transmucosal abutments, which were delayed loaded after 3 months and removed at least three times: 1...
2017: European Journal of Oral Implantology
https://www.readbyqxmd.com/read/29211288/pre-sintered-y-tzp-sandblasting-effect-on-surface-roughness-phase-transformation-and-y-tzp-veneer-bond-strength
#6
Carla Müller Ramos-Tonello, Bruno Freitas Trevizo, Raphaela Farias Rodrigues, Ana Paula Rodrigues Magalhães, Adilson Yoshio Furuse, Paulo Noronha Lisboa-Filho, Americo Sheitiro Tabata, Ana Flávia Sanches Borges
OBJECTIVES.: Sandblasting is a common method to try to improve the Y-TZP/veneer bond strength of dental prostheses, however, it may put stress on zirconia surfaces and could accelerate the t→m phase transformation. Y-TZP sandblasting before sintering could be an alternative to improve surface roughness and bonding strength of veneering ceramic. The aim of this study was to analyze the effect of Y-TZP pre-sintering sandblasting on surface roughness, phase transformation, and the Y-TZP/veneer shear bond strength...
November 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/29208795/in-vitro-assessment-of-influence-of-various-bleaching-protocols-on-the-strength-of-ceramic-orthodontic-brackets-bonded-to-bleached-tooth-surface-a-comparative-study
#7
Divya Iska, Raghu Devanna, Madhvi Singh, Rajkiran Chitumalla, Sai C Bala Balasubramanian, Manish Goutam
INTRODUCTION: Esthetics is one of the common issues because of which patients consult dental orthodontic treatment. Two ways of tooth bleaching are available these days, which includes in-office bleach and home bleach. Various bleaching protocols are available these days for treating the tooth surfaces. Hence, we planned the present study for investigating the impact of various intracoronal bleaching protocols on shear bond strength of ceramic brackets bonded to tooth surface after bleaching...
December 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/29208555/hollow-mesoporous-zirconia-delivery-system-for-biomineralization-precursors
#8
Xue-Qing Huang, Hong-Ye Yang, Tao Luo, Cui Huang, Franklin R Tay, Li-Na Niu
Strategies based on the combination of nanocarrier delivery systems and scaffolds provide bone tissue engineering scaffolds with multifunctional capability. Zirconia, a biocompatible ceramic commonly used in orthopedic and dental implants, was used to synthesize hollow mesoporous nanocapsules for loading, storage and sustained release of a novel polyamine-stabilized liquid precursor phase of amorphous calcium phosphate (PAH-ACP) for collagen biomineralization and bone marrow stromal cells osteoinduction. Hollow mesoporous zirconia (hmZrO2) nanocapsules loaded with biomimetic precursors exhibited pH-sensitive release capability and good biocompatibility...
December 2, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29208280/formulation-and-biological-actions-of-nano-bioglass-ceramic-particles-doped-with-calcarea-phosphorica-for-bone-tissue-engineering
#9
S Dinesh Kumar, K Mohamed Abudhahir, N Selvamurugan, S Vimalraj, R Murugesan, N Srinivasan, A Moorthi
The improvisation of the treatment procedures for treating the various kind of bone defects such as, bone or dental trauma and for diseases such as osteoporosis, osteomyelitis etc., need the suitable and promising biomaterials with resemblance of bone components. Bioactive glass ceramic (BGC) has recently acquired great attention as the most promising biomaterials; hence it has been widely applied as a filler material for bone tissue regeneration. Because it elicts specific biological responses after implantation in addition more potential in formation of strong interface with both hard and soft tissues by dissolution of calcium and phosphate ions...
February 1, 2018: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/29196948/fracture-behavior-of-all-ceramic-implant-supported-and-tooth-implant-supported-fixed-dental-prostheses
#10
Abdul Rahman Alkharrat, Marc Schmitter, Stefan Rues, Peter Rammelsberg
OBJECTIVES: In vitro investigation of the effects of fixed dental prosthesis (FDP) support and loading conditions on the fracture behavior of all-ceramic, zirconia-based FDP veneered with computer-aided design/computer-aided manufacturing (CAD/CAM)-manufactured lithium disilicate ceramic. MATERIALS AND METHODS: Based on a model for a 3-unit FDP in the molar region (tooth in region 15, implant in region 17), 16 identical zirconia frameworks were fabricated and veneered with milled lithium disilicate ceramic...
December 2, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29195815/polyetherketoneketone-pekk-a-framework-material-for-complete-fixed-and-removable-dental-prostheses-a-clinical-report
#11
Jonathan H Dawson, Bart Hyde, Mitch Hurst, Bryan T Harris, Wei-Shao Lin
This clinical report demonstrates the use of polyetherketoneketone (PEKK) as a framework material with individually luted heat-pressed lithium disilicate glass-ceramic crowns for an implant-supported complete fixed dental prosthesis (ICFDP) and a conventional complete removable dental prosthesis (CRDP). This prosthesis design provides a non-computer-aided design and computer-aided manufacturing (CAD-CAM) option for the fabrication of ICFDPs and CRDPs with individualized ceramic crowns for optimal esthetics...
November 29, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29188699/ceramic-fracture-in-metal-ceramic-restorations-the-aetiology
#12
Ayesha Aslam, Danish Azeem Khan, Syed Hammad Hassan, Bilal Ahmed
All dental restorations are liable to failure during function. Failure could be biologic, aesthetic, mechanical or a combination. Ceramic restorations in particular, including metal-ceramics, are prone to mechanical fracture, especially the fracture of veneering porcelain. Fracture of a metal-ceramic restoration jeopardizes function as well as aesthetics. It is equally onerous to manage for both patient and dentist. Optimal management of such cases requires a detailed knowledge of the aetiology behind this phenomenon...
May 2017: Dental Update
https://www.readbyqxmd.com/read/29178722/case-specific-finite-element-analysis-of-dental-cad-cam-prostheses-to-identify-design-flaws-prior-to-manufacture
#13
Davide Apicella, Tim Joda, Gianni Bonadeo, Roberto Sorrentino, Marco Ferrari
PURPOSE: To apply a design optimization strategy to dental prostheses machining to verify whether this approach can detect flaws occurring in the CAD process and to estimate the influence of the type of material on the occurrence of fractures in restorations. METHODS: The stereo lithography interface format of a 4-unit (from canine to first molar) fixed dental prosthesis designed by a conventional dental CAD process was converted into a Finite Element Analysis (FEA) model...
December 2016: American Journal of Dentistry
https://www.readbyqxmd.com/read/29172125/microtensile-bond-strength-4-point-bending-and-nanoleakage-of-resin-dentin-interfaces-effects-of-two-matrix-metalloproteinase-inhibitors
#14
Moataz El Gezawi, Rasha Haridy, Emad Abo Elazm, Fahad Al-Harbi, Mariem Zouch, Dalia Kaisarly
Chronic degradation of hybrid layer collagen by matrix metalloproteinases (MMPs) jeopardizes resin-dentin interfacial integrity and limits the durability of dental restorations. The 4-point bending strength (BS) is a valid but uncommon method of testing the mechanical behavior of resin-dentin interfaces. The present study aims to analyze the influence of two matrix metalloproteinase inhibitors on microtensile bond strength (µTBS), BS and nanoleakage. A total of 48M were divided into three groups according to bonding procedure...
November 20, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/29171091/internal-fit-of-three-unit-fixed-dental-prostheses-produced-by-computer-aided-design-computer-aided-manufacturing-and-the-lost-wax-metal-casting-technique-assessed-using-the-triple-scan-protocol
#15
Bjørn E Dahl, Jon E Dahl, Hans J Rønold
Suboptimal adaptation of fixed dental prostheses (FDPs) can lead to technical and biological complications. It is unclear if the computer-aided design/computer-aided manufacturing (CAD/CAM) technique improves adaptation of FDPs compared with FDPs made using the lost-wax and metal casting technique. Three-unit FDPs were manufactured by CAD/CAM based on digital impression of a typodont model. The FDPs were made from one of five materials: pre-sintered zirconium dioxide; hot isostatic pressed zirconium dioxide; lithium disilicate glass-ceramic; milled cobalt-chromium; and laser-sintered cobalt-chromium...
November 24, 2017: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/29162785/relevance-of-surface-characteristics-in-the-adhesiveness-of-polymicrobial-biofilms-to-crown-restoration-materials
#16
Ayako Teranaka, Kiyoshi Tomiyama, Katsura Ohashi, Kaori Miyake, Tota Shimizu, Nobushiro Hamada, Yoshiharu Mukai, Satoshi Hirayama, Tomotaro Nihei
We used a polymicrobial (PM) biofilm model to examine associations of bacterial adhesiveness with surface characteristics of various dental materials. Four types of dental materials (apatite pellet, zirconia, ceramic, and composite resin) with rough and mirror surfaces were used. Surface roughness, surface free energy, zeta potential, and colony-forming units (CFUs) of the biofilm formations were measured. Biofilms were cultured for 24 h under anaerobic conditions, plated onto blood agar medium, and anaerobically cultured for 4 days...
November 22, 2017: Journal of Oral Science
https://www.readbyqxmd.com/read/29153748/marginal-discrepancy-of-noble-metal-ceramic-fixed-dental-prosthesis-frameworks-fabricated-by-conventional-and-digital-technologies
#17
Ahmed Afify, Stephan Haney, Ronald Verrett, Michael Mansueto, James Cray, Russell Johnson
STATEMENT OF PROBLEM: Studies evaluating the marginal adaptation of available computer-aided design and computer-aided manufacturing (CAD-CAM) noble alloys for metal-ceramic prostheses are lacking. PURPOSE: The purpose of this in vitro study was to evaluate the vertical marginal adaptation of cast, milled, and direct metal laser sintered (DMLS) noble metal-ceramic 3-unit fixed partial denture (FDP) frameworks before and after fit adjustments. MATERIAL AND METHODS: Two typodont teeth were prepared for metal-ceramic FDP abutments...
November 15, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/29152618/effect-of-mechanical-fatigue-on-the-bond-between-zirconia-and-composite-cement
#18
Hugo A Vidotti, Ricardo M Carvalho, Paulo G Coelho, Willian F Zambuzzi, Gerson Bonfante, Accácio L do Valle, Estevam A Bonfante
PURPOSE: To examine the effect of mechanical fatigue on the bond strength of resin composite cemented to silicacoated yttria-tetragonal zirconia polycrystal ceramic (Y-TZP). MATERIALS AND METHODS: Ten Y-TZP blocks were polished down to 600-grit silicon carbide paper. Specimens were silica coated by airborne-particle abrasion with 30-μm silica-modified Al2O3 particles. Blocks were cleaned in an ultrasonic bath, and a dental adhesive was applied and light cured for 20 s...
November 17, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/29151459/the-ball-on-disk-cyclic-wear-of-cad-cam-machinable-dental-composite-and-ceramic-materials
#19
Kazuyuki Handa, Natsuko Murakami, Toshiki Yamazaki, Hidekazu Takahashi, Noriyuki Wakabayashi
The purpose of this study was to investigate the wear volume and the principal strain of machinable dental composite and ceramics in simulated mastication. A ball-on-disk wear test was performed for 3,000 cycles in water, using nine ball/disk combinations of three commercial CAD/CAM materials: feldspathic, lithium disilicate glass ceramics, and a highly loaded composite material (n = 7 for each combination). The wear volume was optically measured using a digital scanner and analyzed for statistical differences based on the materials (α = 0...
November 17, 2017: Journal of Oral Science
https://www.readbyqxmd.com/read/29144007/analysis-of-surface-roughness-fracture-toughness-and-weibull-characteristics-of-different-framework-veneer-dental-ceramic-assemblies-after-grinding-polishing-and-glazing
#20
Guillermo Pradíes, Laura Godoy-Ruiz, Mutlu Özcan, Isabel Moreno-Hay, Francisco Martínez-Rus
PURPOSE: To compare the surface roughness and biaxial flexural strength of dental ceramics obtained after chairside surface modification by mechanical polishing procedures, versus laboratory reglazing. MATERIALS AND METHODS: Discs (16 × 1.5 ± 1.6 mm) (N = 90) of various framework-veneering combinations were fabricated: D/FC: lithium disilicate/feldspathic ceramic; Z/AL: zirconium dioxide/aluminous ceramic; N/FC: noble alloy/feldspathic ceramic; N/FF: noble alloy feldspathic with fluorapatite; B/FC: base alloy/feldspathic ceramic; B/FF: base alloy/feldspathic ceramic with fluorapatite...
November 16, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
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