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European Journal of Prosthodontics and Restorative Dentistry

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https://www.readbyqxmd.com/read/30085483/effect-of-zirconia-pigmentation-on-translucency
#1
I Gomes, L P Lopes, M Fonseca, J Portugal
PURPOSE: the aim of this study was to investigate the effect of shading on translucency and mean grain size of three Zirconia systems (Lava Frame, Ice Zirkon Translucent and Prettau Zirkon). MATERIALS AND METHODS: specimens pigmented in A1, A4 and a non-pigmented specimen was evaluated with Scanning Electron Microscopy and spectrophotometery. RESULTS: the transmittance ranged between 0.18 and 0.52, in Ice Zirkon Translucent A4 and Prettau Zircon non-pigmented, respectively...
August 7, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/30063305/clinical-evaluation-of-sonic-activated-high-viscosity-bulk-fill-nanohybrid-resin-composite-restorations-in-class-ii-cavities-a-prospective-clinical-study-up-to-2-years
#2
T T Akalιn, F O Bozkurt, M Kusdemir, A Özsoy, M Özcan
This study evaluated the clinical performance of a bulk-fill resin composite in class II cavities for up to 2 years. Class II restorations (N=111) were made using a nanohybrid bulk-fill resin composite (SonicFill, Kerr Corp.) and evaluated following 1 week after placement, at 6 months, and thereafter annually up to 2 years using the United States Public Health Service (USPHS) criteria. The changes were analyzed using the McNemar test and the Kaplan-Meier method. No secondary caries was observed until the final recall...
July 31, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/30063306/effect-of-bioactive-composites-on-microhardness-of-enamel-exposed-to-carious-challenge
#3
M F C Pinto, Y Alania, L C Natale, A C Magalhães, R R Braga
This study verified if experimental composites containing calcium phosphate nanoparticles exert a protective effect against enamel demineralization. Three experimental resin-based composites containing 60 vol% of fillers were manipulated. Filler phase was constituted by silanized barium glass and 0%, 10% or 20% (by volume) of dicalcium phosphate dihydrate (DPCD) nanoparticles functionalized with the monomer triethylene glycol dimethacrylate (TEGDMA). Cavities (10 x 2 x 2 mm) were prepared in bovine enamel and restored using one of the experimental materials (n=10)...
July 30, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29989757/accuracy-of-intraoral-scanners-a-systematic-review-of-influencing-factors
#4
J Abduo, M Elseyoufi
Digital impressions by intraoral scanning (IOS) have become an increasingly popular alternative to conventional impressions. This systematic review aimed to evaluate the accuracy of the available IOS systems for dental impression, and identify the influencing factors on accuracy. The literature search was completed to retrieve all the studies that investigated the IOS accuracy when used to scan teeth. A total of 2305 studies were initially obtained. After applying the inclusion criteria, 32 studies were suitable for the analysis...
July 10, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29797848/prosthetic-rehabilitation-with-implant-supported-mandibular-overdenture-after-partial-glossectomy-and-radiation-therapy-a-case-report
#5
E Rissa, T Kurki, J Laine, T Närhi
Implant-supported overdenture is a well-established treatment option for many patients who have functional problems with conventional dentures. It may be primary choice for patients with altered jaw anatomy, neuromuscular disorders, pronounced gag reflex, severe residual ridge resorption and oral tissue defects. In this article we describe a case report, where tongue cancer patients occlusion was rehabilitated with an implantretained overdenture. In 2001 patient was operated for squamous cell carcinoma on the left side of the tongue...
May 30, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29797847/a-review-on-translucent-zirconia
#6
REVIEW
S Ghodsi, Z Jafarian
INTRODUCTION: Zirconia is suggested in many clinical situations due to acceptable biocompatibility, lower price compared with gold restorations, and better appearance than traditional metal ceramic restorations. New translucent monolithic zirconia has been developed to merge strength with improved tooth-colour matching. This work aims to review relevant articles on new translucent zirconia restorative materials. METHODS: The published articles on translucent zirconia were searched through PubMed, Medline, Google scholar, and indexed journals using the following keywords: translucent zirconia, transparent zirconia, and tooth colored zirconia...
May 30, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29722937/a-novel-methodology-to-validate-the-accuracy-of-extraoral-dental-scanners-and-digital-articulation-systems
#7
A Ellakwa, S Elnajar, D Littlefair, G Sara
PURPOSE: The aim of the current study is to develop a novel method to investigate the accuracy of 3D scanners and digital articulation systems. MATERIALS AND METHODS: An upper and a lower poured stone model were created by taking impression of fully dentate male (fifty years old) participant. Titanium spheres were added to the models to allow for an easily recognisable geometric shape for measurement after scanning and digital articulation. Measurements were obtained using a Coordinate Measuring Machine to record volumetric error, articulation error and clinical effect error...
May 30, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29517876/surveys-of-current-teaching-and-practice-for-impressions-for-complete-dentures
#8
N Hussain, H Jabbar, M Hayati, J Wu, T P Hyde
OBJECTIVES: The 3 objectives are to assess current preferences for impressions for complete dentures, audit practice and compare practice to current UK teaching. METHODS: Three surveys where undertaken; a survey of GDPs preferences, an audit of practice and a survey of teaching in UK dental schools. RESULTS: UK Universities advocate border moulded custom trays. In stated preferences, 99% of practitioners used custom trays for private practice; 67% for NHS work...
May 30, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29517875/survival-rates-and-complications-for-zirconia-based-fixed-dental-prostheses-in-a-period-up-to-10-years-a-systematic-review
#9
REVIEW
C Stefanescu, C Ionita, V Nechita, S Drafta, L Oancea, A Petre
AIMS: The purpose of this study was to methodically review the literature concerning the success and survival rates of zirconia fixed dental prostheses (FDPs). METHODS: A systematic search was conducted of MEDLINE, Elsevier and the Cochrane Library to identify relevant articles about zirconia FDPs. In order to obtain suitable articles, rigorous criteria were applied. The minimum follow-up period was five years. RESULTS: From a total of 986 articles identified in the first electronic search, only 10 matched the inclusion criteria...
May 30, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29469999/a-systematic-review-and-meta-analysis-of-baseline-ohip-edent-scores
#10
REVIEW
J M J Duale, Y A Patel, J Wu, T P Hyde
BACKGROUND: OHIP-EDENT is widely used in the literature to assess Oral-Health-Related-Quality-of-Life (OHRQoL) for edentulous patients. However the normal variance and mean of the baseline OHIP scores has not been reported. It would facilitate critical appraisal of studies if we had knowledge of the normal variation and mean of baseline OHIP-EDENT scores. An established figure for baseline OHIP-EDENT, obtained from a meta-analysis, would simplify comparisons of studies and quantify variations in initial OHRQoL of the trial participants...
March 1, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29469998/the-effect-of-complete-denture-occlusion-on-function-and-patient-quality-of-life-systematic-review
#11
REVIEW
J Patel, C Granger, L Morrow
Edentulism presents an ongoing challenge for prosthodontic dentistry. Many aspects of complete denture construction lack contemporary evidence. One such aspect is denture occlusion. Balanced occlusion (BO) has become the prevailing occlusal scheme. It has been suggested that canine guidance (CG) is unsuitable for complete denture occlusion due to an increased risk for tipping of the prostheses. However it may be indicated in patients with minimal alveolus resorption. There has been limited evidence suggesting the superiority of either occlusal scheme over another...
March 1, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29469997/the-influence-of-nitrile-gloves-on-the-setting-behavior-of-polyvinyl-siloxane-putty-impression-materials
#12
COMPARATIVE STUDY
A J Delgado, S P Amaya-Pajares, Y Su, L Behar-Horenstein, T E Donovan
OBJECTIVE: The purpose of this study was to assess the gelation and polymerization time of three polyvinyl siloxane (PVS) putty materials and to determine if those times were affected by nitrile gloves under different conditions. MATERIALS AND METHODS: Ten specimens (n=10) were obtained for each PVS putty material (Express STD, 3M ESPE; Extrude Xtra, Kerr and Exafast, GC) and tested under different conditions (gloves washed, gloves unwashed and hands contaminated)...
March 1, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29469996/a-survey-exploring-the-experiences-attitudes-of-dental-implant-clinicians-in-the-management-of-peri-implantitis-within-the-united-kingdom
#13
G Kane, V Fang, S Simon, J Girdler, O Adeyinka, A Alhilou
Peri-implantitis remains one of the most challenging complications that could threaten the long-term survival of implants. The aim of this survey is to explore the experiences, attitudes and challenges that face clinicians in the management of peri-implantitis. A validated online questionnaire was emailed to implant clinicians in the United Kingdom. 72 clinicians responded to the questionnaire, all of whom face many challenges during the treatment of peri-implantitis, with 79% finding difficulties due to lack of treatment consensus and 78% finding treatment outcomes unpredictable...
March 1, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29461746/marginal-and-internal-gap-of-handmade-milled-and-3d-printed-additive-manufactured-patterns-for-pressed-lithium-disilicate-onlay-restorations
#14
M Revilla-León, M Olea-Vielba, A Esteso-Saiz, I Martínez-Klemm, M Özcan
STATEMENT OF THE PROBLEM: On a pressed lithium disilicate restoration, the building up of a wax pattern of the future restoration is a necessary step on the fabrication process. Conventionally, a wax pattern can be produced by handmade or milled procedures; however, the development of additive manufacturing technologies allows a new fabrication method. PURPOSE: The present study measured the marginal and internal gap of handmade, milled and additive manufactured patterns for an onlay restoration...
March 1, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29461745/the-current-evidence-on-retaining-or-prosthodontically-replacing-retained-deciduous-teeth-in-the-adult-hypodontia-patient-a-systematic-review
#15
REVIEW
D P Laverty, K Fairbrother, O Addison
BACKGROUND: This systematic review aims to evaluate the survival of retaining or replacing deciduous teeth in hypodontia patients with a variety of prosthetic tooth replacement options, to evaluate prognostic factors associated with retaining deciduous teeth, and report on patient based outcomes with these treatment modalities. METHODS: MEDLINE, The Cochrane Central Register of Controlled Trials and Science Direct databases were searched (01/1980 - 08/2017) for studies reporting outcomes associated with retaining or replacing deciduous teeth via prosthetic means in adult hypodontia patients...
March 1, 2018: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29182217/the-effect-of-surface-preparation-of-acrylic-teeth
#16
M Pispili, A Pissiotis, K Michalakis
PURPOSE: To investigate whether the chemical bond between acrylic teeth and heat polymerized PMMA can be altered by chemical and/or mechanical treatment. MATERIALS AND METHODS: One hundred fifty acrylic teeth were divided in groups of 10. Their ridge lap surface underwent mechanical and/or chemical treatments: 1) no treatment, 2) air-abrasion with Al₂O₃ particles, 3) acid etching with phosphoric acid, 4) application of composite resin bonding agent, 5) application of MMA and ethylmethylketone bonding agent, 6) PMMA monomer application...
December 1, 2017: European Journal of Prosthodontics and Restorative Dentistry
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
#17
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
#18
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/29182214/an-investigation-into-the-trueness-and-precision-of-copy-denture-templates-produced-by-rapid-prototyping-and-conventional-means
#19
K Davda, C Osnes, S Dillon, J Wu, P Hyde, A Keeling
OBJECTIVE: To assess the trueness and precision of copy denture templates produced using traditional methods and 3D printing. MATERIAL AND METHODS: Six copies of a denture were made using: 1. Conventional technique with silicone putty in an impression tray (CT). 2. Conventional technique with no impression tray (CNT). 3. 3D scanning and printing (3D). Scan trueness and precision was investigated by scanning a denture six times and comparing five scans to the sixth...
December 1, 2017: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/29182213/the-effect-of-core-and-veneering-design-on-the-optical-properties-of-polyether-ether-ketone
#20
S Zeighami, S Mirmohammadrezaei, M Safi, S M Falahchai
This study aimed to evaluate the effect of core shade and core and veneering thickness on color parameters and translucency of polyether ether ketone (PEEK). Sixty PEEK discs (0.5 and 1 mm in thickness) with white and dentine shades were veneered with A2 shade indirect composite resin with 0.5, 1 and 1.5 mm thickness (n=5). Cores without the veneering material served as controls for translucency evaluation. Color parameters were measured by a spectroradiometer. Color difference (ΔE₀₀) and translucency parameters (TP) were computed...
December 1, 2017: European Journal of Prosthodontics and Restorative Dentistry
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