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https://www.readbyqxmd.com/read/28422367/microtensile-bond-strength-of-a-resin-cement-to-silica-based-and-y-tzp-ceramics-using-different-surface-treatments
#1
Alireza Keshvad, Seyed Mohammad Reza Hakimaneh
PURPOSE: To evaluate the effects of different surface treatments on the microtensile bond strength (μTBS) of bonding between resin cement and lithia or zirconia-based ceramics using an in vitro study. MATERIALS AND METHODS: Three zirconia ceramic blocks (IPS e.max ZirCAD) and three lithium disilicate ceramic blocks (IPS e.max CAD) were sintered and duplicated in resin composite. The zirconia specimens underwent various treatments (n = 1): (i) Sandblast + primer (ZiSa); (ii) sandblast + laser irradiation + primer (ZiSaLa); or (iii) laser irradiation + primer (ZiLa)...
April 19, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28420832/effect-of-air-particle-pressures-on-the-surface-topography-and-bond-strengths-of-resin-cement-to-the-hybrid-ceramics
#2
Jong-Eun Kim, Jee-Hwan Kim, June-Sung Shim, Byoung-Duck Roh, Yooseok Shin
This study aimed to determine the appropriate pressure for airborne-abrasion by comparing the shear bond strength values for different hybrid ceramic surfaces. Two materials were used to produce hybrid ceramic specimens: Lava Ultimate and MAZIC Duro. The group of specimens whose surfaces were not subjected to airborne-abrasion was set as the control group. In the experimental group, airborne-abrasion was performed at pressures of 0.1, 0.2, and 0.3 MPa. After the adhesive and resin cement was applied, an SBS test was performed...
April 18, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28417581/radiopacity-of-resin-cements-using-digital-radiography
#3
Sherif Hosney, Hanan K Abouelseoud, Omar El-Mowafy
STATEMENT OF PROBLEM: Monitoring performance of glass-ceramic based indirect restorations using radiographic imaging might be difficult due to their low radiopacity. Therefore, materials used for their cementation must possess adequate radiopacity. PURPOSE: This study determined radiopacity of a group of resin-cements used for adhesive-cementation of glass-ceramic-based restorations using digital radiography. METHODS: Two specimens were prepared from a group of resin cements (VariolinkII-opaque, VariolinkII-opaque (base), VariolinkII-Transparent, VariolinkII-Transparent (base), Nexus, RelyX Unicem, RelyX ultimate, Duolink, Monocem and Resinomer) and longitudinal sections of same thickness were obtained from molar and premolar...
April 18, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28413061/mechanical-behavior-of-bulk-direct-composite-versus-block-composite-and-lithium-disilicate-indirect-class-ii-restorations-by-cad-fem-modeling
#4
Pietro Ausiello, Stefano Ciaramella, Andrea Fabianelli, Antonio Gloria, Massimo Martorelli, Antonio Lanzotti, David C Watts
OBJECTIVES: To study the influence of resin based and lithium disilicate materials on the stress and strain distributions in adhesive class II mesio-occlusal-distal (MOD) restorations using numerical finite element analysis (FEA). To investigate the materials combinations in the restored teeth during mastication and their ability to relieve stresses. METHODS: One 3D model of a sound lower molar and three 3D class II MOD cavity models with 95° cavity-margin-angle shapes were modelled...
April 13, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28407306/the-influence-of-the-emergence-profile-on-the-amount-of-undetected-cement-excess-after-delivery-of-cement-retained-implant-reconstructions
#5
M Sancho-Puchades, D Crameri, M Özcan, I Sailer, R E Jung, C H F Hämmerle, D S Thoma
OBJECTIVE: To test whether or not one of two emergence profile designs (concave or convex) is superior to the other in terms of remaining cement following cementation of reconstructions on individualized abutments and careful cement removal. MATERIALS AND METHODS: A central incisor with a single implant-supported reconstruction was selected as a model. Six types of abutments (n = 10) with two different emergence profile designs (concave (CC) and convex (CV)) and three crown-abutment margin depths (epimucosal, 1...
April 13, 2017: Clinical Oral Implants Research
https://www.readbyqxmd.com/read/28403361/effect-of-different-composite-core-materials-on-fracture-resistance-of-endodontically-treated-teeth-restored-with-frc-posts
#6
Prapaporn Panitiwat, Prarom Salimee
Objective: This study evaluated the fracture resistance of endodontically treated teeth restored with fiber reinforced composite posts, using three resin composite core build-up materials, (Clearfil Photo Core (CPC), MultiCore Flow (MCF), and LuxaCore Z-Dual (LCZ)), and a nanohybrid composite, (Tetric N-Ceram (TNC)). Material and Methods: Forty endodontically treated lower first premolars were restored with quartz fiber posts (D.T. Light-Post) cemented with resin cement (Panavia F2...
March 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28403360/influence-of-resin-modified-glass-ionomer-and-topical-fluoride-on-levels-of-streptococcus-mutans-in-saliva-and-biofilm-adjacent-to-metallic-brackets
#7
Marcela Cristina Damião Andrucioli, Gisele Faria, Paulo Nelson-Filho, Fábio Lourenço Romano, Mírian Aiko Nakane Matsumoto
Decalcification of enamel during fixed orthodontic appliance treatment remains a problem. White spot lesions are observed in nearly 50% of patients undergoing orthodontic treatment. The use of fluoride-containing orthodontic materials has shown inconclusive results on their ability to reduce decalcification. The aims of this investigation were to compare the levels of Streptococcus mutans (SM) in saliva and biofilm adjacent to orthodontic brackets retained with a resin-modified glass ionomer cement (RMGIC) (Fuji ORTHO LC) and a light cured composite resin (Transbond XT), and to analyze the influence of topical application of the 1...
March 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28403332/influence-of-root-dentin-treatment-on-the-push-out-bond-strength-of-fibre-reinforced-posts
#8
Altair Soares Moura, Rodrigo Dantas Pereira, Fuad Jacob Abi Rached, Bruno Monguilhott Crozeta, Jardel Francisco Mazzi-Chaves, Luis Eduardo Souza-Flamini, Antonio Miranda Cruz
This study evaluates the influence of root dentin treatment with NaOCl alone and combined with EDTA, with and without ultrasound activation, on the push-out bond strength (BS) of fiber-reinforced posts in weakened roots, cemented with RelyX or Panavia. The root canals of 42 maxillary canines were instrumented with Reciproc and 2.5% NaOCl. In the coronal 12mm of all canals, experimental weakening of the roots was produced by reducing dentin thickness with 2.44mm diameter diamond burs. The roots were assigned to 3 groups (n = 14) according to root dentin treatment: 2...
April 10, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28403329/longevity-of-metal-ceramic-crowns-cemented-with-self-adhesive-resin-cement-a-prospective-clinical-study
#9
Lucas Pradebon Brondani, Tatiana Pereira-Cenci, Vinicius Felipe Wandsher, Gabriel Kalil Pereira, Luis Felipe Valandro, César Dalmolin Bergoli
Resin cements are often used for single crown cementation due to their physical properties. Self-adhesive resin cements gained widespread due to their simplified technique compared to regular resin cement. However, there is lacking clinical evidence about the long-term behavior of this material. The aim of this prospective clinical trial was to assess the survival rates of metal-ceramic crowns cemented with self-adhesive resin cement up to six years. One hundred and twenty-nine subjects received 152 metal-ceramic crowns...
April 10, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28386279/effect-of-rebonding-on-the-bond-strength-of-orthodontic-tubes-a-comparison-of-light-cure-adhesive-and-resin-modified-glass-ionomer-cement-in-vitro
#10
Monika Aleksiejunaite, Antanas Sidlauskas, Arunas Vasiliauskas
The purpose of this study was to determine the impact of different enamel preparation procedures and compare light cure composite (LCC) and resin-modified glass ionomer (RMGI) on the bond strength of orthodontic metal tubes rebonded to the enamel. Twenty human molars were divided into two groups (n = 10). Tubes were bonded using LCC (Transbond XT) in group 1 and RMGI (Fuji Ortho LC) in group 2. The tubes in each group were bonded following manufacturers' instructions (experiment I) and then debonded using testing machine...
2017: International Journal of Dentistry
https://www.readbyqxmd.com/read/28385443/effectiveness-of-high-power-leds-to-polymerize-resin-cements-through-ceramics-an-in%C3%A2-vitro-study
#11
André L Faria-E-Silva, Carmem S Pfeifer
STATEMENT OF PROBLEM: The cementation of ceramic veneers using light-polymerized resin cement is largely dependent on the proper light activation of the cement. Light activation using high irradiance could shorten the time required to lute multiple restorations. PURPOSE: The purpose of this in vitro study was to evaluate the light transmission of dental light-polymerizing units through ceramic cylinders and its effect on the polymerization kinetics of a resin cement...
April 3, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28385431/color-stability-of-ceramic-laminate-veneers-cemented-with-light-polymerizing-and-dual-polymerizing-luting-agent-a-split-mouth-randomized-clinical-trial
#12
Ana Maria Estivalete Marchionatti, Vinícius Felipe Wandscher, Michele Mirian May, Marco Antonio Bottino, Liliana Gressler May
STATEMENT OF PROBLEM: The color stability of luting agents influences the esthetics of ceramic laminate veneers. Clinical studies that have evaluated the color changes of veneers cemented to enamel with light- and dual-polymerizing resin cement are lacking. PURPOSE: The purpose of this split-mouth randomized clinical trial was to evaluate the color change and marginal discoloration of dual- and light-polymerizing cement used for cementation of ceramic laminate veneers...
April 3, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28384981/fracture-resistance-of-endodontically-treated-roots-restored-with-fiber-posts-using-different-resin-cements-an-in-vitro-study
#13
Swetha Gopal, Sujatha Irodi, Deepak Mehta, Shankar Subramanya, Vinay Kumar Govindaraju
INTRODUCTION: The influence of the remaining coronal tooth structure along with intra-radicular esthetic posts increases fracture resistance of fractured teeth especially in the anterior region. The advent of resin based luting cements improves the adhesion of fiber posts. AIM: To evaluate the fracture resistance of endodontically treated roots restored with fiber posts using different resin cements - Calibra (etch and rinse), PermaFlo® DC (self-etch primer) and SmartCem2 (self-adhesive)...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28383306/dislodgement-resistance-of-zirconia-copings-cemented-onto-zirconia-and-titanium-abutments
#14
Umut Güler, Yasemin Budak, José Renato Cavalcanti Queiroz, Mutlu Özcan
PURPOSE: To determine the effect of the cement type and abutment material on the tensile strength required to dislodge zirconia copings. MATERIALS AND METHODS: Two experimental groups of abutments were prepared: (1) titanium abutments (n = 30) and (2) zirconia abutments (n = 30). Sixty zirconia copings (custom designed) were fabricated using 3-dimensional computer-assisted design to have a 6-mm projection above the abutment to accommodate a hole, through which a wire was inserted to attach the zirconia coping to a universal testing machine...
April 5, 2017: Implant Dentistry
https://www.readbyqxmd.com/read/28377654/a-comparative-study-of-ion-diffusion-from-calcium-hydroxide-with-various-herbal-pastes-through-dentin
#15
Priyanka Dausage, Rajesh B Dhirawani, Jayant Marya, Vrinda Dhirawani, Vijayendra Kumar
AIM: The aim of this study was to evaluate the diffusion ability of ions through dentinal tubules of different nonalcoholic calcium hydroxide-containing herbal pastes and compare it with the calcium hydroxide paste prepared with saline. MATERIALS AND METHODS: A total of 36 single-rooted premolar teeth were used in this study. The tooth crowns were removed and the root canals were prepared. Depending on the vehicle to be used for preparing calcium hydroxide pastes, six groups were made: Group I: Ca(OH)2 saline paste (control group), group II: Ca(OH)2 papaya latex paste, group III: Ca(OH)2 coconut water paste, group IV: Ca(OH)2 Ashwagandha (Withania somnifera) paste, group V: Ca(OH)2 Tulsi (Ocimum tenuiflorum) paste, and group VI: Ca(OH)2 garlic (Allium sativum) paste...
January 2017: International Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28375561/physicochemical-properties-and-cytotoxicity-of-an-experimental-resin-based-pulp-capping-material-containing-the-quaternary-ammonium-salt-and-portland-cement
#16
Y W Yang, F Yu, H C Zhang, Y Dong, Y N Qiu, Y Jiao, X D Xing, M Tian, L Huang, J H Chen
AIM: To evaluate in vitro the physicochemical properties, cytotoxicity and calcium phosphate nucleation of an experimental light-curable pulp-capping material composed of a resin with antibacterial monomer (MAE-DB) and Portland cement (PC). METHODOLOGY: The experimental material was prepared by mixing PC with a resin containing MAE-DB at a 2:1 ratio. Cured pure resin containing MAE-DB served as control resin. ProRoot MTA and Dycal served as commercial controls. The depth of cure, degree of monomer conversion, water absorption and solubility of dry samples, calcium release, alkalinizing activity, calcium phosphate nucleation and the cytotoxicity of materials were evaluated...
April 4, 2017: International Endodontic Journal
https://www.readbyqxmd.com/read/28367909/bonding-state-of-metal-free-cad-cam-onlay-restoration-after-cyclic-loading-with-and-without-immediate-dentin-sealing
#17
Noriko Ishii, Toshio Maseki, Yoichiro Nara
To examine the bonding state of metal-free CAD/CAM onlay restorations made from two popular resin composite blocks and a typical glass-ceramic block after cyclic loading, with and without immediate dentin sealing (IDS). Standardized mesial-distal-occlusalbuccal (MODB) cavities in 24 extracted human molars were prepared. The intra-cavity dentin surfaces of half of the cavities were immediately sealed with all-in-one adhesive and flowable composite, while those of the other half were not. All cavities were scanned, from which CAD/CAM onlays were fabricated from three types of block and cemented with an adhesive resin cement system...
March 29, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28367893/effect-of-the-type-of-acidic-monomer-on-the-bond-durability-of-two-bottle-type-ceramic-primer
#18
Hideki Tanimura
Ceramic primers consisting of γ-methacryloxypropyl trimethoxysilane (γ-MPS) and either 4-methacryloyloxyethyl trimellitate (4-MET) or 10-methacryloyloxydecyl dihydrogen phosphate (MDP) are useful for facilitating bonding of resin cement to silica-based ceramic surfaces. However, bond stability at the resin-ceramic interface differs among commercial ceramic primers. To determine the ability of 4-MET or MDP to hydrolyze the methoxy group in γ-MPS, the author designed two-bottle experimental ceramic primers comprising γ-MPS solution and an activator solution of 4-MET or MDP...
2017: Journal of Oral Science
https://www.readbyqxmd.com/read/28343677/influence-of-adhesive-cementation-systems-on-the-bond-strength-of-relined-fiber-posts-to-root-dentin
#19
Raquel Viana Rodrigues, Camila Sobral Sampaio, Rafael Rocha Pacheco, Fernanda Miori Pascon, Regina Maria Puppin-Rontani, Marcelo Giannini
STATEMENT OF PROBLEM: Glass fiber post cementation procedures have undergone significant development. Relining the post with composite resin is a technique that aims to reduce resin cement thickness and consequently problems inherent to polymerization. Evidence is sparse regarding the efficacy of bonding procedures at increasing depths (from cervical to apical) using different adhesive cementation techniques. PURPOSE: The purpose of this in vitro study was to evaluate the push-out bond strength (PBS) of composite resin relined glass fiber posts cemented to bovine root dentin using different adhesive cementation protocols...
March 23, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28339597/compositional-differences-in-multi-species-biofilms-formed-on-various-orthodontic-adhesives
#20
Jung-Sub An, Kyungsun Kim, Soha Cho, Bum-Soon Lim, Sug-Joon Ahn
Objectives: To investigate the aspects of multi-species biofilm formation on various orthodontic adhesives with different surface characteristics. Methods: Multi-species biofilms using 13 bacterial species were grown on the surfaces of composite, compomer, and resin-modified glass-ionomer cement (RMGI). The changes in Streptococcus mutans (Sm), Streptococcus sobrinus (Ss), Porphyromonas gingivalis (Pg), Aggregatibacter actinomycetemcomitans (Aa), and total bacteria were determined at day 1 (T1) and day 4 (T2) using real-time polymerase chain reaction...
January 25, 2017: European Journal of Orthodontics
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