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https://www.readbyqxmd.com/read/29196948/fracture-behavior-of-all-ceramic-implant-supported-and-tooth-implant-supported-fixed-dental-prostheses
#1
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/29182215/a-measurement-protocol-for-the-marginal-and-internal-fit-of-all-ceramic-crowns
#2
N Abdulhameed, J-F Roulet, C Chen, H Hussein
AIMS: To evaluate in vitro the influence of firing on marginal and internal fit of all-ceramic milled and pressed lithium-disilicate crowns. MATERIALS AND METHODS: One Standardized model with 1.6mm occlusal and 1.4mm axial reduction was used to fabricate 64 crowns. Using a factorial design, eight groups of lithium disilicate ceramics (n=8) using P=press, C=CAD/CAM, M=monolithic, O=coping, V=veneered, R=as produced: PMR, PMG, POR, PVG, CMR, CMG, COR, CVG. Crowns were produced and cemented on stone dies, then embedded in clear epoxy resin and sectioned into two plains...
November 21, 2017: Community Dental Health
https://www.readbyqxmd.com/read/28983534/from-orthodontic-treatment-plan-to-ultrathin-no-prep-cad-cam-temporary-veneers
#3
Stefano Patroni, Renato Cocconi
Several treatment options are described in the literature to solve the microdontia-related problems of maxillary anterior teeth. These options are often focused on an orthodontic rather than a restorative approach. The case presented here started with an orthodontic phase followed by a restorative one. The aim of the orthodontic phase was to achieve the correct spacing, respecting ideal average tooth proportions. This was done using a digital setup to restore the six anterior teeth, so that an optimal esthetic and functional result was achieved by the end of the orthodontic treatment...
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28960775/cad-cam-ceramic-fragments-in-anterior-teeth-a-clinical-report
#4
Bruna S Sinhori, Sylvio Monteiro, Jussara K Bernardon, Luiz N Baratieri
OBJECTIVE: The treatment of fractured teeth has become a great opportunity to investigate new approaches in the field of restorative dentistry. Restoring teeth with ceramic fragments is a great challenge, however, the computer aided design/computer aided manufacturing (CAD/CAM) technology allows the fabrication of both laminate veneers and ceramic fragments. MATERIALS AND METHODS: Thus, the aim of this article was to report a clinical case where anterior teeth, fractured due to a sport practice, were restored with CAD/CAM ceramic fragments...
September 28, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28959767/shear-bond-strength-of-porcelain-to-a-base-metal-compared-to-zirconia-core
#5
S M Abrisham, A Fallah Tafti, S Kheirkhah, M A Tavakkoli
STATEMENT OF PROBLEM: Recent clinical results for Zirconia all-ceramic restorations have revealed that the fracture rate 6-15% of the Zirconia framework is so low and the core of Zirconia has high stability. However, chipping-off fractures of porcelain are the most common reason for failures of Zirconia in the fixed partial dentures. OBJECTIVES: The purpose of this study was to compare the shear bond strength (SBS) of porcelain in the porcelain fused to metal and all-ceramic crowns with Zirconia core...
March 2017: Journal of Dental Biomaterials
https://www.readbyqxmd.com/read/28940708/clinical-and-patient-reported-outcomes-of-zirconia-based-implant-fixed-dental-prostheses-results-of-a-prospective-case-series-5%C3%A2-years-after-implant-placement
#6
Benedikt Christopher Spies, Siegbert Witkowski, Kirstin Vach, Ralf-Joachim Kohal
OBJECTIVE: To evaluate the clinical and patient-reported outcome of all-ceramic zirconia implant supported fixed dental prostheses (FDPs) 5 years after implant installation. MATERIALS AND METHODS: Thirteen patients were treated with two terminally placed one-piece zirconia implants for a three-unit FDP each. The FDPs consisted of a CAD/CAM-fabricated zirconia framework over-pressed with a fluor-apatite veneering ceramic and were adhesively cemented. Survival and success were assessed by applying modified US Public Health Service (USPHS) criteria and preparation of Kaplan-Meier (KM) plots...
September 21, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28927393/the-complete-digital-workflow-in-fixed-prosthodontics-a-systematic-review
#7
Tim Joda, Fernando Zarone, Marco Ferrari
BACKGROUND: The continuous development in dental processing ensures new opportunities in the field of fixed prosthodontics in a complete virtual environment without any physical model situations. The aim was to compare fully digitalized workflows to conventional and/or mixed analog-digital workflows for the treatment with tooth-borne or implant-supported fixed reconstructions. METHODS: A PICO strategy was executed using an electronic (MEDLINE, EMBASE, Google Scholar) plus manual search up to 2016-09-16 focusing on RCTs investigating complete digital workflows in fixed prosthodontics with regard to economics or esthetics or patient-centered outcomes with or without follow-up or survival/success rate analysis as well as complication assessment of at least 1 year under function...
September 19, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28884029/a-step-by-step-conservative-approach-for-cad-cam-laminate-veneers
#8
Gerardo Durán Ojeda, Ismael Henríquez Gutiérrez, Álvaro Guzmán Marusic, Abelardo Báez Rosales, José Pablo Tisi Lanchares
The use of CAD/CAM technology has allowed the fabrication of ceramic restorations efficiently and with predictable results. Lithium disilicate is a type of glass ceramic material that can be used for the elaboration of laminate veneers, being monolithic restorations which require characterization through a covering ceramic in order to achieve acceptable esthetic results. The next case report shows a predictable clinical protocol for the rehabilitation of the anterior teeth through the preparation of CAD/CAM veneers (e...
2017: Case Reports in Dentistry
https://www.readbyqxmd.com/read/28876966/the-effect-of-resin-bonding-on-long-term-success-of-high-strength-ceramics
#9
M B Blatz, M Vonderheide, J Conejo
Digital manufacturing, all-ceramics, and adhesive dentistry are currently the trendiest topics in clinical restorative dentistry. Tooth- and implant-supported fixed restorations from computer-aided design (CAD)/computer-aided manufacturing (CAM)-fabricated high-strength ceramics-namely, alumina and zirconia-are widely accepted as reliable alternatives to traditional metal-ceramic restorations. Most recent developments have focused on high-translucent monolithic full-contour zirconia restorations, which have become extremely popular in a short period of time, due to physical strength, CAD/CAM fabrication, and low cost...
September 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28853505/-effect-of-repeated-sintering-and-variations-in-thickness-on-the-color-and-microstructure-of-dental-lithium-disilicate-based-glass-ceramic-veneers
#10
Huang Cui, Yu Jia, Meng Shaofeng, Gao Biyun
Objective The aim of this study is to evaluate the effect of repeated sintering and variation in thickness on the color and microstructure of dental lithium disilicate-based glass ceramic veneers. Methods A total of 24 computer aided design and computer aided manufacturing (CAD/CAM) veneers was fabricated using the IPS e.max-CAD LS2 and then randomly divided into four groups (S0, S1, S2, S3; n=6). Each group was sintered 0, 1, 2, 3 times individually according to the manufacturer's recommendation. The color parameters (L, C, H, a, b values) of all the specimens were measured by a Vita easyshade dental colorimeter...
August 1, 2017: Hua Xi Kou Qiang Yi Xue za Zhi, Huaxi Kouqiang Yixue Zazhi, West China Journal of Stomatology
https://www.readbyqxmd.com/read/28852743/load-bearing-capacity-fracture-mode-and-wear-performance-of-digitally-veneered-full-ceramic-single-crowns
#11
Oliver Schubert, Ephraim Nold, Matthias Obermeier, Kurt Erdelt, Michael Stimmelmayr, Florian Beuer
OBJECTIVES: Computer-aided technologies can help to minimize clinical complications of zirconia-based restorations such as veneering porcelain fractures. The aim of this study was to evaluate different veneering approaches for zirconia single crowns regarding contact wear, fracture strength, and failure mode. METHODS: Six different types of computer-aided design (CAD) crowns were manufactured and conventionally cemented on 10 metal dies each: three groups with a zirconia framework and a CAD/CAM-fabricated veneering cap ("digital veneering system": DVS, CAD-on, Infix CAD), zirconia-based crowns with pressed veneering caps (Infix Press), zirconia framework containing the dentin layer with only the incisal enamel material added (dentin-core), and conventional substructure with powder buildup veneering porcelain (layering technique)...
2017: International Journal of Computerized Dentistry
https://www.readbyqxmd.com/read/28843882/influence-of-various-bonding-techniques-on-the-fracture-strength-of-thin-cad-cam-fabricated-occlusal-glass-ceramic-veneers
#12
Christine Yazigi, Matthias Kern, Mohamed Sad Chaar
OBJECTIVES: To evaluate the efficiency of immediate dentin sealing and the effects of different bonding protocols on the fracture strength of CAD/CAM occlusal veneers bonded to exposed dentin. METHODS: Ninety-six extracted maxillary premolars were initially divided into three main groups with 32 specimens each: without immediate dentin sealing, immediate dentin sealing/total etching and immediate dentin sealing/selective etching. Teeth were identically prepared in the dentin to receive occlusal veneers of 0...
August 15, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28829937/using-cad-cam-modified-correlation-mode-to-produce-laminate-veneers-a-six-month-case-report
#13
Fsf de Siqueira, Afm Cardenas, Y L Gruber, C Kose, Y M Pupo, G M Gomes, Omm Gomes, J C Gomes
The expectation of an esthetically harmonious smile increases the level of difficulty when treating patients. Laminate veneers stand out as a treatment option for cosmetic rehabilitation in clinical practice, as they are a more conservative procedure and mimic dental structures. These laminate veneers are generally made with different techniques; the most common requires an impression of the prepared tooth, an impression antagonist, fabrication models, and extensive laboratory time. The computer-aided design/computer-aided manufacturing (CAD/CAM) system optimizes the fabrication of prosthetic structures, reducing chairside time and promoting good esthetic results...
September 2017: Operative Dentistry
https://www.readbyqxmd.com/read/28717792/accelerated-fatigue-resistance-%C3%A2-of-novel-design-histoanatomic-%C3%A2-implant-restorations-made-of-%C3%A2-cad-cam-bilaminar-assemblies
#14
Ivan Molina, Jack Goldberg, Claudia Maziero Volpato, Pascal Magne
OBJECTIVES: Evaluate the fatigue resistance and failure mode of novel-design implant restorations made of histoanatomic computer-assisted design/computer-assisted manufacturing (CAD/CAM) bilaminar bonded assemblies. MATERIAL AND METHODS: 60 screw-retained implant restorations were fabricated. Monolithic restorations were used as a control group (15 lithium disilicate: group CE; and 15 nanofilled composite resin: group CL), and compared with bilaminar restorations (15 dentin-shaped lithium disilicate mesostructures with a bonded nanofilled composite resin veneer: group CEL; and 15 dentin-shaped nanofilled composite resin mesostructures with a bonded lithium disilicate veneer: group CLE)...
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28710653/mechanical-performance-of-cement-and-screw-retained-all-ceramic-single-crowns-on-dental-implants
#15
Matthias Obermeier, Oliver Ristow, Kurt Erdelt, Florian Beuer
OBJECTIVES: This in-vitro study was performed to compare the contact wear, fracture strength and failure mode of implant-supported all-ceramic single crowns manufactured with various fabrication and fixation concepts. MATERIALS AND METHODS: Fifty dental implants (Conelog Ø 4,3mm/L11mm, Camlog Biotechnologies AG) were embedded and treated with all-ceramic molar single-crowns. Three groups received hand-layered zirconia crowns (IPS e.max Ceram/ IPS e.max ZirCAD, Ivoclar Vivadent AG): CZL (cement-retained zirconia-based layered) group crowns were cemented conventionally, SZL (screw-retained zirconia-based layered) group crowns were screw-retained, MZL (modified zirconia-based layered) group crowns showed a different coping design with screw retention...
July 15, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28689909/effects-of-core-and-veneer-thicknesses-on-the-color-of-cad-cam-lithium-disilicate-ceramics
#16
Wol Kang, Jong-Kyoung Park, So-Ri Kim, Woong-Chul Kim, Ji-Hwan Kim
STATEMENT OF PROBLEM: The color of dental ceramics is important for achieving successful esthetic restorations. However, insufficient studies are available of the color of recently introduced computer-aided design-computer-aided manufacturing (CAD-CAM) lithium disilicate ceramics as functions of the core and veneer thicknesses. PURPOSE: The purpose of this in vitro study was to evaluate the effects of the thickness of different core and veneer thicknesses on the color of CAD-CAM lithium disilicate ceramics...
July 6, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28681501/systematic-development-of-esthetics-and-function-in-a-young-patient-with-maxillary-dental-aplasia
#17
D Edelhoff, O Prandtner, R Saeidi Pour, A Wichelhaus, A Liebermann
OBJECTIVES: Full-arch rehabilitations in young patients suffering from dental agenesis should compensate for the reduced vertical dimension of occlusion and restore both esthetics and function at minimal biological cost. This requires precise planning and maximum patient compliance during the preprosthetic phase. The pretreatment period with tooth-colored splints promotes a predictable outcome of the final restorations. Clinical considerations: Thanks to better restorative materials and adhesive techniques and increased knowledge of how to preserve sound tooth structures, prosthetic dentistry has increasingly turned toward minimally invasive procedures...
July 6, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28675043/effect-of-round-curvature-of-anterior-implant-supported-zirconia-frameworks-finite-element-analysis-and-in-vitro-study-using-digital-image-correlation
#18
Ana Messias, Maria Augusta Neto, Ana Martins Amaro, Pedro Nicolau, Luis Manuel Roseiro
Two groups of 4-unit zirconia frameworks were produced by CAD/CAM to simulate the restoration of an anterior edentulous gap supported by 2 implant-abutment assemblies. Group 1 comprised straight configuration frameworks and group 2 consisted of arched frameworks. Specimens were made with the same connector cross-section area and were cemented and submitted to static loads. Displacements were captured with two high-speed photographic cameras and analysed with video correlation system. Frameworks and the implant-abutment assembly were scanned and converted to 3DCAD objects by reverse engineering process...
July 4, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28653047/noninvasive-bilaminar-cad-cam-composite-resin-veneers-%C3%A2-a-semi-in-direct-approach
#19
Pascal Magne
Direct composite resin restorations have been recognized for their valuable clinical service and respect of intact hard tissue. The cost-effectiveness and inherent minimally invasive approach of resin-based materials means that they are also gaining popularity for use in computer-aided design/computer-aided manufacture (CAD/CAM) procedures. Several cases from the student clinics at the Herman Ostrow School of Dentistry of USC are presented that could have been resolved either with direct composite resin restorations or with indirect porcelain veneers...
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28645670/fracture-resistance-of-cad-cam-monolithic-ceramic-and-veneered-zirconia-molar-crowns-after-aging-in-a-mastication-simulator
#20
Merve Bankoğlu Güngör, Secil Karakoca Nemli
STATEMENT OF PROBLEM: The demand for ceramic restorations has increased over the past years, and now various machinable materials can be used for chairside computer-aided design and computer aided manufacturing (CAD-CAM) systems. Limited studies of these new materials make it difficult to evaluate their mechanical performance, advantages, and limitations. PURPOSE: The purpose of this in vitro study was to investigate the fracture resistance of CAD-CAM monolithic ceramic and veneered zirconia molar crowns after thermomechanical aging...
June 20, 2017: Journal of Prosthetic Dentistry
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