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https://www.readbyqxmd.com/read/29143388/in-vitro-assessment-of-retention-and-resistance-failure-loads-of-teeth-restored-with-a-complete-coverage-restoration-and-different-core-materials
#1
Vasileia Tsiagali, Yvoni Kirmanidou, Argirios Pissiotis, Konstantinos Michalakis
PURPOSE: To investigate in vitro the retention and the resistance form, as well as the failure modes of maxillary premolars restored with cast metal crowns and different core materials. MATERIALS AND METHODS: Sixty human extracted maxillary premolars were selected according to their size and were embedded in PMMA resin blocks. After removing a part of their clinical crowns, the teeth were randomly divided into 3 groups of 20 teeth and were either left unrestored, or they were restored with amalgam or composite resin...
November 16, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29128350/biomechanical-behavior-of-adhesive-cement-layer-and-periodontal-tissues-on-the-restored-teeth-with-zirconia-rbfdps-using-three-kinds-of-framework-design-3d-fea-study
#2
Ayana Uraba, Reina Nemoto, Kosuke Nozaki, Tasuku Inagaki, Satoshi Omori, Hiroyuki Miura
PURPOSE: To investigate stress and strain concentrations on resin-bonded fixed dental prostheses (RBFDPs) frameworks of different design using finite element analysis. METHODS: A human dry skull was scanned and models were produced using three-dimensional printer. After abutment preparation, three frameworks, including a three-unit RBFDP, and two-unit cantilevered RBFDPs using #21 and #23 for the abutment tooth, were fabricated. Scanned data were subtracted to define boundary of each structure...
November 8, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29128128/cad-fe-modeling-and-analysis-of-class-ii-restorations-incorporating-resin-composite-glass-ionomer-and-glass-ceramic-materials
#3
Pietro Ausiello, Stefano Ciaramella, Massimo Martorelli, Antonio Lanzotti, Antonio Gloria, David C Watts
OBJECTIVES: To investigate the influence of specific resin-composite, glass ceramic and glass ionomer cement (GIC) material combinations in a "multi-layer" technique to replace enamel and dentin in class II mesio-occlusal-distal (MOD) dental restorations using 3D-Finite Element Analysis (FEA). METHODS: Four 3D-FE models (A-D) of teeth, adhesively restored with different filling materials, were created and analyzed in comparison with a 3D model (E) of a sound lower molar...
November 8, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29109340/effect-of-three-metal-priming-agents-on-the-bond-strength-of-adhesive-resin-cement-to-ag-zn-sn-in-alloy-and-component-metals
#4
Natsuko Imamura, Tomohiro Kawaguchi, Hiroshi Shimizu, Yutaka Takahashi
The aim of this study was to investigate the effect of three metal priming agents on the bond strength of adhesive resin cement to Silver-Zinc-Tin-Indium (Ag-Zn-Sn-In) alloy and pure Ag, Zn, Sn, and In. The specimens were air-abraded with alumina and then primed with one of three metal priming agents: V-Primer, Estenia Opaque Primer, or Alloy Primer. The metal disks were bonded with adhesive resin cement (Super-Bond Bulk-mix technique). Shear bond strengths (n=10/group) were determined before and after 50,000 thermocycles for Ag-Zn-Sn-In alloy as well as after 5,000 thermocycles for pure Ag, Zn, Sn and In...
November 3, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/29106299/comparison-of-two-early-treatment-protocols-for-anterior-dental-crossbite-in-the-mixed-dentition-a-randomized-trial
#5
Cristina B Miamoto, Leandro S Marques, Lucas G Abreu, Saul M Paiva
OBJECTIVE: To evaluate and compare two treatment protocols to correct anterior dental crossbite in the mixed dentition. MATERIALS AND METHODS: Thirty children, 8-10 years of age, participated. Individuals were divided into two groups. Group 1 consisted of 15 children treated with an upper removable appliance with finger springs; group 2, 15 children treated by bonding resin-reinforced glass ionomer cement bite pads on the lower first molars. The 30 participants were evaluated before treatment (T1) and 12 months after treatment began (T2)...
November 6, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/29103104/clinical-survival-of-chair-side-generated-monolithic-lithium-disilicate-crowns-10-year-results
#6
Angelika Rauch, Sven Reich, Luise Dalchau, Oliver Schierz
OBJECTIVES: Nowadays, all-ceramic materials are routinely used within the treatment of patients in dentistry. The objective of this prospective clinical trial was the evaluation of chair-side generated monolithic lithium disilicate crowns after 10 years. MATERIALS AND METHODS: Forty-one posterior full contour crowns made of lithium disilicate ceramics were inserted with a self-adhesive resin cement in 34 patients (20 university/14 private practice) using a chair-side CAD/CAM technique...
November 4, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29102159/effect-of-ionizing-radiation-on-properties-of-restorative-materials
#7
Suzane Boa Nova Brandeburski, Alvaro Della Bona
OBJECTIVE: To evaluate the effect of ionizing radiation from high energy X-ray on properties of restorative materials. METHODS: Study materials (3M-ESPE) were: Z250-microhybrid resin-based composite (Filtek Z-250); Z350-nanofilled resin-based composite (Filtek Z-350XT); VIT-resin-modified glass ionomer cement (Vitremer); and KME-conventional glass ionomer cement (Ketac Molar Easymix). Sixty bar-shaped and cylinder-shaped specimens were fabricated from each material...
October 25, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29099373/fluorination-of-zirconia-surfaces-impairs-bonding-to-resin-cement
#8
Leandro Tolomelli Carraro Franco, Marina Amaral, Rafael Pino Vitti, Alecsandro Moura Silva, Laís Regiane Silva-Concílio, Ana Christina Claro Neves
The aim of this study was to evaluate the fluorination of a zirconia surface as an alternative treatment for bonding to resin cement; the null hypothesis was that fluorination would not improve adhesion values. Four different surface treatments were performed on the surface of yttria-stabilized tetragonal zirconia polycrystal discs (N = 80): Ctrl (control), no treatment; SB, sandblasting with 50-μm alumina particles; SBS, sandblasting with 30-μm silica-modified alumina particles and application of silane; and SF, fluorination with sulfur hexafluoride-containing plasma...
November 2017: General Dentistry
https://www.readbyqxmd.com/read/29099164/synthesis-and-characterization-of-an-injectable-and-hydrophilous-expandable-bone-cement-based-on-poly-methyl-methacrylate
#9
Zhao Yang, Lei Chen, Yuxin Hao, Yuan Zang, Xiong Zhao, Lei Shi, Yang Zhang, Yafei Feng, Chao Xu, Faqi Wang, Xinli Wang, Bowen Wang, Chenxin Liu, Yufei Tang, Zixiang Wu, Wei Lei
Poly(methyl methacrylate) (PMMA), the most common bone cement, has been used as a graft substitute in orthopedic surgeries such as vertebroplasty. However, an undesirable minor crack in the bone-cement interface provoked by shrinkage during polymerization and high elastic modulus of conventional PMMA bone cement dramatically increases the risk of vertebral body refracture postsurgery. Thus, herein, a hydrophilous expandable bone cement was synthesized based on a PMMA commercial cement (Mendec Spine Resin), acrylic acid (AA), and styrene (St)...
November 10, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29098160/micro-raman-vibrational-identification-of-10-mdp-bond-to-zirconia-and-shear-bond-strength-analysis
#10
Diego Martins De-Paula, Alessandro D Loguercio, Alessandra Reis, Natasha Marques Frota, Radamés Melo, Kumiko Yoshihara, Victor Pinheiro Feitosa
So far, there is no report regarding the micro-Raman vibrational fingerprint of the bonds between 10-methacryloyloxy-decyl dihydrogen phosphate (10-MDP) and zirconia ceramics. Thus, the aim of this study was to identify the Raman vibrational peaks related to the bonds of 10-MDP with zirconia, as well as the influence on microshear bond strength. Micro-Raman spectroscopy was employed to assess the vibrational peak of 10-MDP binding to zirconia. Microshear bond strength of the dual-cure resin cement to zirconia with the presence of 10-MDP in composition of experimental ceramic primer and self-adhesive resin cement was also surveyed...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29091110/evaluation-in-vivo-of-biocompatibility-of-differents-resin-modified-cements-for-bonding-orthodontic-bands
#11
Janaina A Mesquita, Rogério Lacerda-Santos, Gêisa A M Sampaio, Gustavo P Godoy, Cassiano F W Nonaka, Pollianna M Alves
The focus of this study was to test the hypothesis that there would be no difference between the biocompatibility of resin-modified glass ionomer cements. Sixty male Wistar rats were selected and divided into four groups: Control Group; Crosslink Group; RMO Group and Transbond Group. The materials were inserted into rat subcutaneous tissue. After time intervals of 7, 15 and 30 days morphological analyses were performed. The histological parameters assessed were: inflammatory infiltrate intensity; reaction of multinucleated giant cells; edema; necrosis; granulation reaction; young fibroblasts and collagenization...
October 26, 2017: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29090511/fracture-behavior-marginal-gap-width-and-marginal-quality-of-vented-or-pre-cemented-cad-cam-all-ceramic-crowns-luted-on-y-tzp-implants
#12
Lucia K Zaugg, Simon Meyer, Nadja Rohr, Isabella Zehnder, Nicola U Zitzmann
OBJECTIVES: To investigate the fracture behavior and marginal gap region of CAD/CAM fabricated lithium disilicate (L) and zirconium dioxide (Z) crowns using palatal venting (PV), pre-cementation with custom analogs (CA), or conventional cementation technique (SP) with adhesive cement (A) or resin-modified glass ionomer cement (B). MATERIAL AND METHODS: Twelve groups (n = 6) were set according to material (L, Z), cement (A, B), and technique (PV, CA, SP). Specimens were thermo-mechanical aged (TML), loaded until fracture (LF) and fracture patterns recorded...
October 31, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/29083086/polymerization-shrinkage-and-porosity-profile-of-dual-cure-dental-resin-cements-with-different-adhesion-to-dentin-mechanisms
#13
Adrieli Burey, Paulo José Dos Reis, Bruno Luiz Santana Vicentin, Cássia Cilene Dezan Garbelini, Márcio Grama Hoeppner, Carlos Roberto Appoloni
This research aims to probe the porosity profile and polymerization shrinkage of two different dual cure resin cements with different dentin bonding systems. The self-adhesive resin cement RelyX U200 (named RU) and the conventional Allcem Core (named AC) were analyzed by x-ray microtomography (μCT) and Scanning Electron Microscopy (SEM). Each cement was divided into two groups (n = 5): dual-cured (RUD and ACD) and self-cured (RUC and ACC). μCT demonstrated that the method of polymerization does not influence the porosity profile but the polymerization shrinkage...
October 30, 2017: Microscopy Research and Technique
https://www.readbyqxmd.com/read/29079354/effect-of-luting-agent-on-the-load-to-failure-and-accelerated-fatigue-resistance-of-lithium-disilicate-laminate-veneers
#14
Marco M M Gresnigt, Mutlu Özcan, Marco Carvalho, Priscilla Lazari, Marco S Cune, Peywand Razavi, Pascal Magne
OBJECTIVE: The aim of this study was to investigate the influence of the luting agent on the application of laminate veneers (LVs) in an accelerated fatigue and load-to-failure test after thermo-cyclic aging. METHODS: Sound maxillary central incisors (N=40) were randomly divided into four groups to receive LVs (Li2Si2O5) that were adhesively bonded: Group CEMF: Adhesive cement (Variolink Esthetic LC), fatigue test; Group CEMLF: Adhesive cement, load-to-failure test; Group COMF: Resin composite (Enamel HFO), fatigue test; Group COMLF: Resin composite, load-to-failure test...
October 24, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/29075997/effect-of-different-power-settings-of-er-cr-ysgg-laser-before-or-after-tribosilicatization-on-the-microshear-bond-strength-between-zirconia-and-two-types-of-cements
#15
Leonardo C Zeidan, Camila M Esteves, Juliana A Oliveira, Aldo Brugnera, Alessandra Cassoni, José Augusto Rodrigues
The aim of this study was to evaluate the effect of different output powers of Er,Cr:YSGG laser and the association with tribochemical silica coating on the bond strength between zirconia ceramic and two resin cements. One hundred ninety-two zirconia ceramic bars (IPS e-max ZirCAD Ivoclar Vivadent-) were sectioned (6 × 6 × 4 mm), sintered, and randomly divided into 12 groups for each cement system according to the surface treatment (n = 8): C-without treatment (control); R-tribochemical coating + resin cement (control); 2L-laser (2...
October 27, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/29075411/effect-of-antibacterial-adhesive-approaches-on-bonding-durability-of-fiber-posts-cemented-with-self-etch-resin-cement
#16
Fereshteh Shafiei, Mahtab Memarpour, Narges Vafamand, Mahsa Mohammadi
BACKGROUND: Longevity of post-retained restoration is highly depended on bonding stability of fiber post (FP) to root dentin. This study evaluated the effect of different antibacterial/adhesive approaches on bonding durability of FPs luted into root canal with a self-etch cement. MATERIAL AND METHODS: Seventy-two human maxillary central incisor roots were divided into six groups after endodontic treatment, based on the antibacterial/adhesive treatments as follows: 1)ED primer II (ED, control); 2) Clearfil Protect Bond (PB); 3) 2% chlorhexidine (CH) pretreatment + ED primer II (CH+ED); 4) CH-incorporated into ED primer II (CH in ED); 5) CH pretreatment + Clearfil SE Bond (CH+SE); and 6)CH-incorporated into SE primer (CH in SE)...
September 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29075408/evaluation-of-the-effect-of-home-bleaching-agents-on-surface-microhardness-of-different-glass-ionomer-cements-containing-hydroxyapatite
#17
Farahnaz Sharafeddin, Mahsa Kowkabi, Soodabe Shoale
BACKGROUND: Home bleaching agents may exert some negative effects on surface hardness of restorative materials such as glass-ionomer cements (GICs). Since some studies have shown that some components such as hydroxyapatite (HA), as a bioactive glass, can improve the mechanical properties of dental materials, the effect of bleaching agents on surface hardness of GICs containing hydroxyapatite is questionable. This study was designed to evaluate the effect of home bleaching agents on the surface hardness of two different commercially available GICs containing hydroxyapatite...
September 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/29071037/the-impact-of-plasma-treatment-of-cercon%C3%A2-zirconia-ceramics-on-adhesion-to-resin-composite-cements-and-surface-properties
#18
Kasra Tabari, Sepanta Hosseinpour, Hossein Mohammad-Rahimi
Introduction: In recent years, the use of ceramic base zirconia is considered in dentistry for all ceramic restorations because of its chemical stability, biocompatibility, and good compressive as well as flexural strength. However, due to its chemical stability, there is a challenge with dental bonding. Several studies have been done to improve zirconia bonding but they are not reliable. The purpose of this research is to study the effect of plasma treatment on bonding strength of zirconia. Methods: In this in vitro study, 180 zirconia discs' (thickness was 0...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/29071026/in-vitro-effect-of-bleaching-with-810-nm-and-980-nm-diode-laser-on-microhardness-of-self-cure-and-light-cure-glass-ionomer-cements
#19
Ladan Ranjbar Omrani, Sara Khoshamad, Elham Tabatabaei Ghomshe, Nasim Chiniforush, Sedighe Sadat Hashemi Kamangar
Introduction: This study sought to assess the effect of bleaching combined with irradiation of 810 nm and 980 nm diode laser on microhardness of 2 commonly used self-cure and light-cure glass ionomer cements (GICs) in comparison with conventional bleaching (without laser). Methods: In this in vitro, experimental study, 60 samples were fabricated of A2 shade of Fuji IX and Fuji II LC GICs (n=30) and each group was divided into 3 subgroups (n=10). The first subgroups were subjected to bleaching with Opalescence Xtra Boost plus 980 nm diode laser irradiation...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/29070158/partial-pulpotomy-in-immature-permanent-molars-after-carious-exposures-using-different-hemorrhage-control-and-capping-materials
#20
Beste Özgür, Serdar Uysal, H Cem Güngör
PURPOSE: This study compared the outcome of partial pulpotomies with mineral trioxide aggregate (MTA) or calcium hydroxide (CH) following hemorrhage control with 2.5 percent sodium hypochlorite (SH) or 0.9 percent sterile saline (SS) solutions in cariously exposed immature permanent molars. METHODS: Following removal of two to three mm of the pulp at the exposure site, 80 Class I cavities were randomly allocated to four groups according to the hemorrhage control agent and pulp-capping material used: (1) group one-SH plus MTA; (2) group two-SS plus MTA; (3) group three-SH plus CH; (4) group four-SS plus CH...
September 15, 2017: Pediatric Dentistry
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