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Judith Schwenter, Fredy Schmidli, Roland Weiger, Jens Fischer
Aim of this study was to investigate the mechanism of adhesive bonding to the polymer-infiltrated ceramic VITA Enamic [VE]. Shear bond strength was measured with three resin composite cements: RelyX Unicem 2 Automix, Clearfil SA and Variolink II on polished surfaces of VE and its components silicate ceramic [SC] and polymer [PM] (n=12). Further, the effect of etching VE with 5% HF for 15-240 s and the application of silane coupling agents was analyzed in a screening test (n=6). Shear bond strength measurements were performed after 24 h of water storage at 37°C...
2016: Dental Materials Journal
B Stawarczyk, D Awad, N Ilie
Determining the amount of blue light (360-540nm) passing through nine monolithic computer-aided design/computer-aided manufacturing (CAD/CAM) materials depends on material thickness, initial irradiance, and the distance between the curing unit and the specimen's surface. A total of 180 specimens of two thicknesses (1 mm and 2 mm, n=10/subgroup) were fabricated from TelioCAD, VITA CAD-Temp (VCT), experimental nanocomposite, LAVA Ultimate (LU), VITA ENAMIC (VE), VITA MarkII (VM), IPS EmpressCAD (IEC), IPS e.maxCAD (IEM), and CELTRA DUO (CD)...
September 2016: Operative Dentistry
D P Lise, A Van Ende, J De Munck, Lcc Vieira, L N Baratieri, B Van Meerbeek
OBJECTIVES: To evaluate the effect of different surface treatments on the bond strength to a composite and a polymer-infiltrated ceramic CAD/CAM block after six-month artificial aging. METHODS AND MATERIALS: Two types of CAD/CAM blocks (Cerasmart, GC; Enamic, Vita Zahnfabrik) were cut in slabs of 4-mm thickness, divided into six groups, and subjected to the following surface treatments: group 1: no treatment; group 2: sandblasting (SB); group 3: SB + silane (Si); group 4: SB + Si + flowable composite (see below); group 5: 5% hydrofluoric acid etching (HF) + Si; and group 6: 37% phosphoric acid etching (H3PO4) + Si...
September 30, 2016: Operative Dentistry
Andreas Kurbad
The use of materials with elastic properties for the fabrication of dental implant superstructures seems to be a promising way to reduce the functional occlusal forces on implants. Vita Enamic (Vita Zahnfabrik, Bad Säckingen), a hybrid ceramic material for CAD/CAM technology, is available in a special form that can be relatively easily combined with titanium (Ti) base connectors for the fabrication of abutment crowns and mesostructures. Thus, an easily manageable method is available for reducing peak loads on dental implant fixtures...
2016: International Journal of Computerized Dentistry
Nathaniel C Lawson, Ritika Bansal, John O Burgess
OBJECTIVE: To measure the mechanical properties of several CAD/CAM materials, including lithium disilicate (e.max CAD), lithium silicate/zirconia (Celtra Duo), 3 resin composites (Cerasmart, Lava Ultimate, Paradigm MZ100), and a polymer infiltrated ceramic (Enamic). METHODS: CAD/CAM blocks were sectioned into 2.5mm×2.5mm×16mm bars for flexural strength and elastic modulus testing and 4mm thick blocks for hardness and wear testing. E.max CAD and half the Celtra Duo specimens were treated in a furnace...
September 14, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
Haifa El Zhawi, Marina R Kaizer, Asima Chughtai, Rafael R Moraes, Yu Zhang
OBJECTIVE: To investigate fatigue fracture resistance and wear behavior of a polymer infiltrated ceramic network (PICN) material (ENAMIC, Vita Zahnfabrik). METHODS: Anatomically shaped ENAMIC monolithic crowns were milled using a CAD/CAM system. The crowns were cemented on aged dentin-like composite abutments (Z100, 3M ESPE) with resin-based cement (Vita DUO Cement, Vita). The specimens were subjected to 2 types of fatigue and wear tests: (1) accelerated sliding-contact mouth-motion step-stress fatigue test (n=24) in water; and (2) long-term sliding-contact mouth-motion fatigue/wear test using a clinically relevant load (P=200N, n=8) in water...
August 29, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
Simon Flury, Stefanie Zita Schmidt, Anne Peutzfeldt, Adrian Lussi
The aim was to investigate dentin bond strength of two resin-ceramic materials and five cements after 24 h and six months storage. Cylinders (n=15/group) of Lava Ultimate (3M ESPE) and VITA ENAMIC (VITA Zahnfabrik) were cemented to mid-coronal dentin of 300 extracted human molars with RelyX Ultimate (3M ESPE), PANAVIA F2.0 (Kuraray), Variolink II (Ivoclar Vivadent), els cem (Saremco Dental), or Ketac Cem Plus (3M ESPE). Shear bond strength (SBS) was measured after 24 h or six months storage (37°C, 100% humidity) and statistically analyzed (significance level: α=0...
October 1, 2016: Dental Materials Journal
Enam Alhagh Charkhat Gorgich, Azizollah Arbabisarjou, Fatheme Taji, Sanam Barfroshan
INTRODUCTION & AIM: Identification of effective factors on job satisfaction can impact the efficiency and quality of health services and personal life. The Aim of this study was to investigate, Job Satisfaction and External Effective Factors in Operating Room Nurses Educational Hospitals of Zahedan in 2015. MATERIALS & METHODS: This descriptive-analytical study was conducted on 137 operating room Nurses of Ali-Ebne-Abitaleb, Khatam-Al-Anbia and Alzahra hospital in Zahedan, Iran, enrolled through the convenience sampling in 2015...
2016: Global Journal of Health Science
Amal Alharbi, Stefano Ardu, Tissiana Bortolotto, Ivo Krejci
To evaluate the stain susceptibility of CAD/CAM blocks and direct composite after long term exposure to various staining agents. 40 disk-shaped samples were fabricated from each of nine materials; six CAD/CAM (Vitablocs Mark II, Paradigm MZ100, Experimental Vita Hybrid Ceramic, Vita Enamic, Experimental Kerr and Lava Ultimate) and three direct composites (Filtek Supreme, Venus Diamond and Filtek Silorane). Samples were randomly divided into five groups (n = 8) according to different staining solutions (distilled water, tea, red wine, coffee and artificial saliva)...
July 25, 2016: Odontology
Jan-Frederik Güth, Pascal Magne
OBJECTIVE: The optical integration (OI) of monolithic CAD/CAM materials under 4 illuminations was evaluated using a standardized and clinically relevant method. MATERIALS AND METHODS: Eighteen inlays were manufactured and placed (glycerin gel). Standardized photos were taken under 4 illuminations (neutral white light direct and indirect illumination, cross-polarized light, fluorescent light). Six evaluators defined the optical integration score (OIS) as the "visibility" of the restoration (0 = worst OI, 4 = optimal OI)...
2016: International Journal of Esthetic Dentistry
M D Gaintantzopoulou, H M El-Damanhoury
The aim of the study was to evaluate the effect of preparation depth and intraradicular extension on the marginal and internal adaptation of computer-aided design/computer-assisted manufacture (CAD/CAM) endocrown restorations. Standardized preparations were made in resin endodontic tooth models (Nissin Dental), with an intracoronal preparation depth of 2 mm (group H2), with extra 1- (group H3) or 2-mm (group H4) intraradicular extensions in the root canals (n=12). Vita Enamic polymer-infiltrated ceramic-network material endocrowns were fabricated using the CEREC AC CAD/CAM system and were seated on the prepared teeth...
July 5, 2016: Operative Dentistry
Martin Rosentritt, Sebastian Hahnel, Frank Engelhardt, Michael Behr, Verena Preis
OBJECTIVES: The aim of this study is to investigate the performance and fracture resistance of different CAD/CAM ceramic and composite materials as implant- or tooth-supported single crowns with respect to the clinical procedure (screwed/bonded restoration). MATERIALS AND METHODS: One hundred twenty crowns were fabricated on implants or human molar teeth simulating (a) chairside procedure ([CHAIR] implant crown bonded to abutment), (b) labside procedure ([LAB] abutment and implant crown bonded in laboratory, screwed chairside), and (c) reference ([TOOTH] crowns luted on human teeth)...
July 1, 2016: Clinical Oral Investigations
Enam Alhagh Charkhat Gorgich, Sanam Barfroshan, Gholamreza Ghoreishi, Abbas Balouchi, Naser Nastizaie, Azizollah Arbabisarjou
INTRODUCTION & AIM: Emotional intelligence is one of the most important leading factors influencing different aspects of human life. It leads individuals to percept their feelings for appropriate decision making and fields for future accomplishments. The aim of this study was to Investigation of the associations of self-assessed EI with academic achievement and general health among medical students. MATERIALS & METHODS: This cross-sectional study was conducted on 426 students of Zahedan University of Medical Sciences from October 2014 to May 2015...
2016: Global Journal of Health Science
Diane M Daubert, Joanna L Kelley, Yuriy G Udod, Carolina Habor, Chris G Kleist, Ilona K Furman, Igor N Tikonov, Willie J Swanson, Frank A Roberts
The tooth enamel development gene, enamelin (ENAM), showed evidence of positive selection during a genome-wide scan of human and primate DNA for signs of adaptive evolution. The current study examined the hypothesis that a single-nucleotide polymorphism (SNP) C14625T (rs7671281) in the ENAM gene identified in the genome-wide scan is associated with a change in enamel phenotype. African Americans were selected as the target population, as they have been reported to have a target SNP frequency of approximately 50%, whereas non-Africans are predicted to have a 96% SNP frequency...
2016: International Journal of Oral Science
Sara Al-Marabeh, Enam Khalil, Mohammad Khanfar, Amal G Al-Bakri, Muhammed Alzweiri
Azelaic acid is a dicarboxylic acid compound used in treatment of acne vulgaris. However, high concentration (ca 20%) is needed to guarantee the drug availability in the skin. The latter increases the incidence of side effects such as local irritation. The prodrug strategy to enhance azelaic acid diffusion through skin was not reported before. Thus, a lipophilic prodrug of azelaic acid (diethyl azelate [DEA]) was synthesized and investigated to improve percutaneous availability of azelaic acid, with a subsequent full physical, chemical, and biological characterization...
June 27, 2016: Pharmaceutical Development and Technology
M H Khan, M N Islam, M U Ahmed, A M Shafique, M S Bari, M Z Islam, N U Ahamed, M R Masud, K Bhowmick, M Begum, S M Akhter, S R Siddique
Coronary Angiogram (CAG) has been used to detect coronary artery disease in myocardial infarction (both STEMI and NSTEMI) patients. The purpose of this study was to compare the degree of coronary artery disease among STEMI and NSTEMI patients. Among acute coronary syndrome in NSTEMI we found more widespread coronary artery disease other than STEMI. Lack of documentations encouraged us to perform this study in our center. In this retrospective observational study we summarized all myocardial infarction (MI) patients who underwent coronary angiography (CAG) from August 2013 to August 2014 at Enam Medical College Hospital, Dhaka, Bangladesh and data of degree of coronary artery disease were recorded...
April 2016: Mymensingh Medical Journal: MMJ
Katia Jedeon, Sophia Houari, Sophia Loiodice, Thuy Tran Thu, Manon Le Normand, Ariane Berdal, Sylvie Babajko
Enamel defects resulting from environmental conditions and the way of life are public health concerns because of their high prevalence. As their etiology is unclear, the aim of this study was to analyze the various forms of enamel hypomineralization, and to characterize the genes involved in this process to determine the mechanisms involved in disruptions of amelogenesis. We used bisphenol A (BPA) and fluoride as models, both of which are commonly encountered in human populations and used in dentistry. Wistar rats were chronically exposed to 5 µg/kg/day BPA from day 1 of gestation to day 65 after birth (P65) and 5 mM fluoride from P21 to P65...
June 3, 2016: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
Benjamin M Perry, Anne Nguyen, Bryce L Desmond, Collin M Blattner, R Scott Thomas, R John Young
Eruptive melanocytic nevi have been reported in association with severe blistering diseases, renal transplantation, malignancy, AIDS, and medications. Eruptive nevi associated with medications have been reported with increasing frequency. Of particular interest are eruptive nevi associated with medications developing in association with biologic therapies, which we anticipate will continue to become more common as use of these medications continues to increase. We searched the databases PubMed/MEDLINE, Cochrane, and Cumulative Index to Nursing and Allied Health Literature for associated medications using the terms "eruptive nevi," "melanocytic + medications," and "nevi + medications" for relevant articles...
May 27, 2016: Journal of the American Academy of Dermatology
Marleen Peumans, Emilija Bajraktarova Valjakova, Jan De Munck, Cece Bajraktarova Mishevska, Bart Van Meerbeek
PURPOSE: To evaluate the influence of different surface treatments of six novel CAD/CAM materials on the bonding effectiveness of two luting composites. MATERIALS AND METHODS: Six different CAD/CAM materials were tested: four ceramics - Vita Mark II; IPS Empress CAD and IPS e.max CAD; Celtra Duo - one hybrid ceramic, Vita Enamic, and one composite CAD/CAM block, Lava Ultimate. A total of 60 blocks (10 per material) received various mechanical surface treatments: 1...
2016: Journal of Adhesive Dentistry
Geetika Chirumamilla, Cary E Goldstein, Nathaniel C Lawson
OBJECTIVES: To evaluate the clinical performance and survival of Enamic crowns placed in a prosthodontic dental practice. METHODS: Thirty-five patients and 45 crowns were included in the study. At 1-year recall appointments, the restorations were examined for survival. At the 2-year recall appointment, all restorations were clinically evaluated by an independent evaluator for CDA clinical criteria. Kaplan-Meier method and a log-rank test were used to compare the survival of the restorations placed with resin and resin-modified glass ionomer (RMGI) cements...
July 2016: Journal of Esthetic and Restorative Dentistry
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