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European Journal of Prosthodontics and Restorative Dentistry

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https://www.readbyqxmd.com/read/29182216/adhesion-and-early-colonization-of-s-mutans-on-lithium-disilicate-reinforced-glass-ceramics-monolithic-zirconia-and-dual-cure-resin-cement
#1
L Viitaniemi, A Abdulmajeed, T Sulaiman, E Söderling, T Närhi
OBJECTIVE: Monolithic zirconia and glass ceramics are increasingly used in implant crowns. Limited data is available on bacterial adhesion and early biofilm formation on these materials. METHODS: Four different materials were investigated: (1) Lithium disilicate glass-ceramics (LDS), (2) Fully stabilized zirconia (FSZ), (3) Partially stabilized zirconia (PSZ), and (4) Dual curing cement (DCC). The materials' surfaces were characterized with spinning disc confocal microscopy and by water contact angle and surface free energy (SFE) measurements...
December 1, 2017: European Journal of Prosthodontics and Restorative Dentistry
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...
December 1, 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28869368/3d-metal-printing-additive-manufacturing-technologies-for-frameworks-of-implant-borne-fixed-dental-prosthesis
#3
M R León, I M Klemm, J García-Arranz, M Özcan
An edentulous patient was rehabilitated with maxillary metal-ceramic and mandibular metal-resin implant-supported fixed dental prosthesis (FDP). Metal frameworks of the FDPs were fabricated using 3D additive manufacturing technologies utilizing selective laser melting (SLM) and electron beam melting (EBM) processes. Both SLM and EBM technologies were employed in combination with computer numerical control (CNC) post-machining at the implant interface. This report highlights the technical and clinical protocol for fabrication of FDPs using SLM and EBM additive technologies...
September 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28869367/survival-of-direct-posterior-composites-with-and-without-a-bulk-fill-base
#4
C McGuirk, F Hussain, B J Millar
OBJECTIVES: Direct composite restorations are increasingly popular and a flowable bulk-fill base material (SDR, Dentsply) claims to minimise stress through a more flexible polymerisation process. This retrospective audit of restorations placed in general practice compares SDR based restorations with conventional composite restorations. METHODS: Restorations were all placed by one operator using a similar clinical technique and were audited as Group G, placed with a conventional layering composite (G-aenial, GC) and Group S which had a bulk-fill base of SDR (Dentsply) and then were covered with G-aenial (GC)...
September 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28869366/effect-of-distance-on-light-transmission-through-polymerized-resin-composite
#5
M K Aromaa, L V J Lassila, P K Vallittu
OBJECTIVE: Light transmittance of dental composites varies between products and shades, but also light curing units differ to each other in their irradiance and fiber optic structure of curing tip. The aim of this study was to investigate whether there is linear relationship between the distance of the curing tip to the resin composite and irradiance at lower surface of the resin composite. MATERIALS AND METHODS: Disks of 1 mm thickness (6mm diameter) were fabricated...
September 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28869365/influence-of-different-ceramic-systems-on-marginal-misfit
#6
S P Vargas, A C C Neves, R Vitti, M Amaral, M N Henrique, L R Silva-Concílio
OBJECTIVE: the aim of this study was to evaluate the marginal misfit at the interface between a ceramic coping and its abutment. METHODS: Twenty-four specimens were made with solid abutments. The specimens were divided into 3 groups according to the ceramic system (n = 8): Lava (zirconia), IPS e.max Press (lithium disilicate), and IPS Empress Esthetic (leucite). All copings were cemented with resin luting agent (RelyX U200) and the marginal misfit were evaluated at 3 different times: initial, after cementation, and after mechanical cycling using a linear measuring microscope (Measuring Microscope STM-Olympus) at a magnification of 40x...
September 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28869364/nanocryl-coating-of-pmma-complete-denture-base-materials-to-prevent-scratching
#7
Hawa M Fathi, Hajer A Benonn, Anthony Johnson
The surface of polymethylmethacrylate (PMMA) is vulnerable to indentation by hard objects that may contribute to abrade the material surface and subject it to wear. This phenomenon promotes an increase in the surface roughness leading to microbial colonisation which can endanger the general health of wearers and damage the intra-oral prosthesis. The aim of this study is to investigate the effect of three different nanocryl coating agents (Easy Glaze, G-Coat Plus and Formulation XP) on surface roughness and thickness of PMMA material after a simulating cleaning process utilizing an electric toothbrush and three different dentifrices (pastes and immersion)...
September 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28590097/five-year-clinical-evaluation-of-restorations-placed-in-a-low-shrinkage-stress-composite-in-uk-general-dental-practices
#8
F J Trevor Burke, Russell J Crisp, Ali James, Louis Mackenzie, Owen Thompson, A Pal, Peter Sands, William M Palin
This paper evaluates the five year clinical evaluation of restorations formed in a low shrinkage stress resin composite material (3M ESPE Filtek Silorane, Seefeld, Germany) and placed in the general dental practices of five members of the PREP Panel, a group of UK practice-based researchers. Results indicated satisfactory performance of the material under evaluation, other than for marginal staining, which affected 60% of the restorations evaluated after five years, albeit with less than 10% of the circumference of the restorations being affected...
June 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28590096/efficacy-of-removable-partial-denture-treatment-a-retrospective-oral-health-related-quality-of-life-evaluation
#9
Zaid Ali, Sarah Baker, Poyan Barabari, Nicolas Martin
Successful removable partial dentures (RPDs) use may be influenced by patient and denture variables including age, denture experience and number or position of teeth being replaced. Influence of patient and denture variables on OHRQoL with RPDs was investigated using ordinal logistic regression analysis. METHODS: Participants provided with RPDs were invited to complete OHIP-20 at least 4 weeks after dentures were fitted. Clinical records were retrieved to identify a number of independent variables...
June 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28590095/the-early-erosive-and-abrasive-challenge-a-profilometric-electron-microscopic-and-microhardness-study-using-human-bovine-and-ovine-enamel
#10
James Clark Field, Paula Jane Waterhouse, Matthew John German
AIM: This study aimed to test the null hypothesis that there are no significant differences in surface characteristics of eroded and abraded human, ovine and bovine enamel. DESIGN: Twenty enamel slabs were prepared from bovine, human and ovine incisor crowns, and randomly assigned to one of 4 treatments: 30 second/4 minute immersion at 1%/6% w/v citric acid. Post-erosion, an oscillatory brush was used for 20 seconds. Roughness parameters, height change and scanning electron microscopy were measured at each stage...
June 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28590094/optical-properties-and-failure-load-of-thin-cad-cam-ceramic-veneers
#11
Henriika Maunula, Jenni Hjerppe, Lippo L V Lassila, Timo O Närhi
This study aimed to compare optical properties and failure load of leucite (IPS Empress CAD LT) and lithium disilicate glass ceramic (IPS e.max CAD LT) materials in incisor veneers. Four groups of veneers were made on 36 bovine incisors with Cerec 3D milling unit (n=9/group): 0.5 and 0.3 mm thick leucite glass and 0.5 and 0.3 mm lithium disilicate glass veneers. The optical features were measured with CM-700d spectrophotometer using white and yellow try-in pastes. Differences were determined by means of ΔE value and luminance...
June 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28590093/marginal-adaptation-and-internal-fit-of-posterior-3-unit-zirconia-fpds-fabricated-with-different-cad-cam-systems
#12
Maryam Memarian, Leyla Sadighpour, Rojman Nosratpour, Mohammad J K Fard
The purpose of this study was to compare the accuracy of zirconia FPDs fabricated by different laboratory CAD/CAM system. Thirty-six FPD zirconia frameworks were fabricated on corresponding epoxy resin models that were duplicated from a master model of mandibular second premolar and second molar mounted in an acrylic block to simulate missing first mandibular tooth. Frameworks were divided into groups (n = 12) of three laboratory CAD/CAM systems: Cercon, Amann Girrbach, and Zirkonzahn. For the two factors, system and abutment type, the absolute marginal discrepancy (AMD) was measured before cementation...
June 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28590092/additive-manufacturing-a-novel-method-for-fabricating-cobalt-chromium-removable-partial-denture-frameworks
#13
Frank Alifui-Segbaya, Robert John Williams, Roy George
Additive manufacturing (AM) often referred to as 3D printing (3DP) has shown promise of being significantly viable in the construction of cobalt-chromium removable partial denture (RPD) frameworks. The current paper seeks to discuss AM technologies (photopolymerization processes and selective laser melting) and review their scope. The review also discusses the clinical relevance of cobalt-chromium RPD frameworks. All relevant publications in English over the last 10 years, when the first 3D-printed RPD framework was reported, are examined...
June 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28590091/an-update-on-the-protocols-and-biologic-actions-of-platelet-rich-fibrin-in-dentistry
#14
Rucha Shah, Triveni M G, Raison Thomas, Dhoom Singh Mehta
Platelet rich fibrin (PRF) is a surgical biologic additive that is prepared by manipulation of autologous blood. It has now evolved to become one of the most widely used platelet concentrate in dentistry. It has almost replaced Platelet rich plasma (PRP) for usage owing to its advantages such as being 100% autogenous, easy technique, time and cost effectiveness, superior & prolonged growth factor release. It finds varied applications in dentistry including management of gingival recession, for guided bone regeneration in periodontal, peri-implant and endodontic bone defects...
June 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28569452/zirconia-reinforced-lithium-silicate-ceramic-a-2-year-follow-up-of-a-clinical-experience-with-anterior-crowns
#15
Guilherme de Siqueira Ferreira Anzaloni Saavedra, Flávia Pires Rodrigues, Marco Antonio Bottino
The aim of this manuscript is to describe 2-year follow-up of a clinical experience with a zirconia-reinforced lithium silicate ceramic for an anterior rehabilitation with single metal-free crowns. The maxillary-central incisor teeth crowns were made by zirconium-reinforced lithium silicate and covered with porcelain were obtained with a digital impression with the intra-oral scanner of the CEREC system as a basis for virtual design, as well as a laminate for the left lateral maxillary incisor, based on a "double scanning" technique...
March 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28569451/treatment-outcomes-and-assessment-of-oral-health-related-quality-of-life-in-treated-hypodontia-patients
#16
Motasum Abu-Awwad, Kenneth Hemmings, Saja Mannaa, Daljit Gill, Akil Gulamali, Aviva Petrie
OBJECTIVES: 1. Assess treatment outcomes and oral health related quality of lifeM (OHRQoL) of hypodontia patients after completing dental treatment at the Eastman Dental Hospital and compare it with British public norms. 2. Assess factors which have an association with patients' reported OHRQoL. METHODS: Hypodontia patients who finished their treatment completed a 16-item questionnaire (UK oral health related quality-of-life measure), a list of four questions about their satisfaction with treatment received and a clinical assessment using modified USPHS criteria...
March 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28569450/a-cross-sectional-survey-on-reasons-for-initial-placement-and-replacement-of-single-crowns
#17
Recep Uzgur, Zeynep Uzgur, Hakan Colak, Ertugrul Ercan, Mehmet Dalli, Mutlu Özcan
This cross-sectional survey investigated the reasons for placement and replacement of single crowns, the type of materials selected for initial placement and evaluated their longevity. Information was collected over 19 months period using a questionnaire focusing on the principal reasons for the placement and replacement of crowns, selected material type and the age of the crowns at the time of replacement. A total of 842 single crowns were evaluated in 476 patients. Of the 842 crowns, 472 (56%) were initial placements and 370 (44%) replacements...
March 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28569449/a-randomised-controlled-trial-of-a-nanofilled-composite-at-three-years-did-selective-enamel-etching-have-an-effect
#18
F J T Burke, Russell J Crisp, William M Palin, Peter Sands, O Thompson, Jonathan Jones, Ali James, Kerry Osborne-Smith
General dental practice is increasingly being recognised as the ideal situation for the conduct of clinical trials into the longevity of restorations. The aim of this study was to investigate the survival of 75 nanofilled resin composite restorations placed in an assortment of cavities using a self-etch dentine bonding agent, in five UK dental practices by members of the UK-based practice-based research group, the PREP Panel, with half of the restorations receiving a selective enamel etch and the other half being placed using a self-etching approach...
March 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28569448/outcomes-of-immediate-function-implant-prosthetic-restorations-with-mechanical-complications-a-retrospective-clinical-study-with-5-years-of-follow-up
#19
Paulo Maló, Miguel Alexandre de Araujo Nobre, Carlos Moura Guedes, Ricardo Almeida
Mechanical complications may have a significant impact on the outcome of implant-supported restorations; however, few studies address the topic. This study investigated the outcomes of implant supported restorations with mechanical complications. A total of 378 patients with 378 restorations supported by 1283 implants were included. Results demonstrated a prosthetic and implant cumulative survival rate at 5 years of 99.7% and 95.7%, respectively. Maxillary implants were a determinant for implant failure (hazard ratio= 6...
March 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28569447/marginal-accuracy-and-internal-fit-of-dental-copings-fabricated-by-modern-additive-and-subtractive-digital-technologies
#20
Neha Nelson, Jyothi K S, Kiran Sunny
The margins of copings for crowns and retainers of fixed partial dentures affect the progress of microleakage and dental caries. Failures occur due to altered fit which is also influenced by the method of fabrication. An in-vitro study was conducted to determine among the cast base metal, copy milled zirconia, computer aided designing computer aided machining/manufacturing zirconia and direct metal laser sintered copings which showed best marginal accuracy and internal fit. Forty extracted maxillary premolars were mounted on an acrylic model and reduced occlusally using a milling machine up to a final tooth height of 4 mm from the cementoenamel junction...
March 2017: European Journal of Prosthodontics and Restorative Dentistry
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