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https://www.readbyqxmd.com/read/28102922/effect-of-the-unfilled-space-size-of-the-abutment-screw-access-hole-on-the-extruded-excess-cement-and-retention-of-single-implant-zirconia-crowns
#1
Sulieman S Al-Johany, Mohammad D Al Amri, Ahmed S Al-Bakri, Mohammed N Al-Qarni
PURPOSE: To evaluate in vitro the effect of the size of the unfilled space of the abutment screw access hole on the amount of extruded excess cement and the retention of zirconia copings. MATERIALS AND METHODS: Twelve dental implant replicas were attached to the corresponding abutments and embedded in acrylic resin blocks. A total of 36 CAD/CAM zirconia copings were fabricated by one technician using the standard technique. Abutments were divided into group I: the entire screw access channel was completely filled (nonspaced); group II: 1-mm-spaced; and group III: 2-mm-spaced...
January 19, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28076496/evaluation-of-dentin-hypersensitivity-treatment-with-glass-ionomer-cements-a-randomized-clinical-trial
#2
Marina de Matos Madruga, Adriana Fernandes da Silva, Wellington Luiz de Oliveira da Rosa, Evandro Piva, Rafael Guerra Lund
A randomized, double-blind, split-mouth clinical trial was performed compared the desensitizing efficacy of the resin-modified glass ionomer cement (GIC) ClinproTM XT (3M ESPE, Minnesota, USA) and the conventional GIC Vidrion R (SS White, Gloucester, UK) in a 6-month follow-up. Subjects were required to have at least two teeth with dentin hypersensitivity. Teeth were divided at random into 2 groups, one group received Clinpro XT and the other conventional GIC Vidrion R. Treatments were assessed by tactile and air blast tests using Visual Analogue Scale (VAS) at baseline, after 20 minutes, and at 7, 15, 21, 30, 90 and 180 days post-treatment...
January 5, 2017: Brazilian Oral Research
https://www.readbyqxmd.com/read/28074386/the-effect-of-ceramic-thickness-and-resin-cement-shades-on-the-color-matching-of-ceramic-veneers-in-discolored-teeth
#3
Wenzhong Xing, Xiaodong Chen, Dafei Ren, Kangru Zhan, Yining Wang
The objective of this study was to analyze the effects of ceramic material thickness and resin cement shade on the color matching of ceramic veneers at the gray tooth structures. Seventy-two artificial maxillary right central incisor teeth (C2 shade) were prepared according to veneer tooth preparation in practice. Ceramic materials (LT, A2 shade, IPS e.max Press) were selected to fabricate the 0.50- and 0.75-mm thick veneers at the body region. The ceramic veneer specimens were bonded to the artificial teeth by the 6 shades of resin cements (Variolink Veneer: shades of HV+3, LV-2, LV-3; and RelyX(TM) Veneer: shades of WO, TR, A3)...
January 10, 2017: Odontology
https://www.readbyqxmd.com/read/28068271/significant-shear-bond-strength-improvements-of-a-resin-modified-glass-ionomer-cement-with-a-resin-coating
#4
Michael T Stallings, Daniel C Stoeckel, Kenneth G Rawson, Dan B Welch
Previous evidence has suggested that resin-modified glass ionomer cements (RMGICs) may be sensitive to temperature and moisture changes for the first 24 hours after photopolymerization. To test the hypothesis that a resin coating placed over the surface of an RMGIC restoration would decrease the susceptibility to moisture and temperature conditions, 44 RMGIC samples were prepared in inverted-cone recesses drilled in epoxy resin plates. After abrasion of all samples with 800-grit silicon carbide paper to simulate a diamond bur finish on the surface, a coat of highly filled resin was applied to the experimental group (n = 22) and cured according to the manufacturer's instructions...
January 2017: General Dentistry
https://www.readbyqxmd.com/read/28054040/systematic-review-on-highly-viscous-glass-ionomer-cement-resin-coating-restorations-part-ii-%C3%A2-do-they-merge-minamata-convention-and-minimum-intervention-dentistry
#5
Andrej M Kielbassa, Georg Glockner, Michael Wolgin, Karl Glockner
BACKGROUND: With the Minamata Convention the use of mercury will be phased down, and this undoubtedly will have an effect on dental treatment regimens and economic resources. Composite resin restorations are considered viable alternatives to amalgam fillings; however, these will not be covered completely by health insurance systems in many countries. Recently, a high-viscosity glass-ionomer cement (hvGIC) processed with a resinous coating (RC) has been introduced, and has been marketed as a restorative material in load-bearing Class I cavities (and in Class II cavities with limited size), thus serving as a possible alternative to amalgam fillings...
2017: Quintessence International
https://www.readbyqxmd.com/read/28052206/does-addition-of-propolis-to-glass-ionomer-cement-alter-its-physicomechanical-properties-an-in-vitro-study
#6
P Subramaniam, K L Girish Babu, G Neeraja, S Pillai
: Propolis is a natural resinous substance produced by honey bees. The antimicrobial effects of glass ionomer cement have been shown to improve with the addition of propolis; however its effect on the physicomechanical properties of the cement is not known. AIM: The purpose of this study was to evaluate the compressive strength and solubility of conventional restorative glass ionomer cement following the addition of propolis. STUDY DESIGN: Twenty half cylindrical samples were prepared with conventional restorative glass ionomer cement formed the control group...
2017: Journal of Clinical Pediatric Dentistry
https://www.readbyqxmd.com/read/28048947/effect-of-implant-position-and-span-length-on-stresses-around-implants-assisting-claspless-distal-extension-partial-overdentures-an-invitro-study
#7
Moustafa Abdou Elsyad, Ahmed Kabeel, Nesreen Elmekawy
The aim of this invitro study was to evaluate the effect of implant position and edentulous span length on stresses around implants assisting claspless distal extension partial overdentures.Four bilateral mandibular distal extension acrylic models were constructed. Two implants were inserted in the distal extension ridges parallel to each other and perpendicular to the ridges. Based on the implant position, models were categorized into two groups: Group I, mesial implants position and Group II, distal implant position...
January 3, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28044248/the-opinion-of-children-and-their-parents-about-four-different-types-of-dental-restorations-in-a-public-health-service-in-brazil
#8
R Maciel, D Salvador, K Azoubel, R Redivivo, C Maciel, C da Franca, E Amerongen, V Colares
AIM: To investigate the opinion of children and their parents of four different types of restoration placed in primary molars. METHODS: A mixed method study in which both children and their parents were involved. In the quantitative study, children and parents gave their opinion using a face scale about four different types of restoration immediately after placement, evaluating how satisfied they were. In the qualitative part, children and their parents were interviewed to report their preference among the four types of restoration using dental models and photos...
January 2, 2017: European Archives of Paediatric Dentistry: Official Journal of the European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28029189/morphological-and-immunohistochemical-analysis-of-the-biocompatibility-of-resin-modified-cements
#9
Janaina Almeida Mesquita, Rogério Lacerda-Santos, Gustavo Pina Godoy, Cassiano Franscisco Weege Nonaka, Pollianna Muniz Alves
The aim of this double-blind randomized study was to evaluate the biocompatibility of resin-modified glass ionomer cements (RMGIC) by means of morphological and immunohistochemical analyses. RMGICs were selected and divided into four groups: Group CK (Crosslink Orthodontic Band Cement); Group RS (Resilience Light Cure Band Cement) Group RMO (RMO Band Cement), Group TP (Transbond Plus Light Cure Band), and Group C (Control-polyethylene). The materials were implanted in rat subcutaneous tissues, randomly selected for this study...
December 28, 2016: Microscopy Research and Technique
https://www.readbyqxmd.com/read/28028417/a-twofold-comparison-between-dual-cure-resin-modified-cement-and-glass-ionomer-cement-for-orthodontic-band-cementation
#10
Hanaa El Attar, Omnia Elhiny, Ghada Salem, Ahmed Abdelrahman, Mazen Attia
AIM: To test the solubility of dual cure resin modified resin cement in a food simulating solution and the shear bond strength compared to conventional Glass ionomer cement. MATERIALS AND METHOD: The materials tested were self-adhesive dual cure resin modified cement and Glass Ionomer (GIC). Twenty Teflon moulds were divided into two groups of tens. The first group was injected and packed with the modified resin cement, the second group was packed with GIC. To test the solubility, each mould was weighed before and after being placed in an analytical reagent for 30 days...
December 15, 2016: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28024818/effect-of-production-method-on-surface-roughness-marginal-and-internal-fit-and-retention-of-cobalt-chromium-single%C3%A2-crowns
#11
Nils Lövgren, Rikard Roxner, Susanne Klemendz, Christel Larsson
STATEMENT OF PROBLEM: New production methods have been developed for metal ceramic restorations. Different production methods may show different surface roughness and fit, which may affect retention and long-term success. PURPOSE: The purpose of this in vitro study was to examine 3 different production methods with regard to surface roughness, marginal and internal fit, and retention of cobalt-chromium alloy single-crown copings. MATERIAL AND METHODS: A master abutment of a premolar mandibular tooth preparation with 4-mm height and a 0...
December 23, 2016: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28024588/surface-analysis-and-shear-bond-strength-of-zirconia-on-resin-cements-after-non-thermal-plasma-treatment-and-or-primer-application-for-metallic-alloys
#12
Aljomar José Vechiato-Filho, Adaias Oliveira Matos, Richard Landers, Marcelo Coelho Goiato, Elidiane Cipriano Rangel, Grace Mendonça De Souza, Valentim Adelino Ricardo Barão, Daniela Micheline Dos Santos
There is no established protocol for bonding zirconia (Y-TZP) with resin cements. Non-thermal plasma (NTP) may be an alternative for the clinical problems related to adhesion. The purpose of the present study was to characterize the surface of Y-TZP exposed to methane (CH4) NTP or coated with a layer of primer for metal alloys and the association between the two methods and to evaluate the effect of NTP treatment on bond strength between Y-TZP and two resin cements. A total of 235 Y-TZP discs (8×2mm) were distributed into five groups: Co (no surface treatment), Pr (primer), NTP (methane plasma), Pr+NTP and NTP+Pr...
March 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28018561/comparison-of-the-fit-accuracy-of-zirconia-based-prostheses-generated-by-two-cad-cam-systems
#13
Seok-Joon Ha, Jin-Hyun Cho
PURPOSE: The purposes of this study are to evaluate the internal and marginal adaptation of two widely used CAD/CAM systems and to study the effect of porcelain press veneering process on the prosthesis adaptation. MATERIALS AND METHODS: Molar of a lower jaw typodont resin model was prepared by adjusting a 1.0 mm circumferential chamfer, an occlusal reduction of 2.0 mm, and a 5° convergence angle and was duplicated as an abrasion-resistant master die. The monolithic crowns and copings were fabricated with two different CAD/CAM system-Ceramil and Zirkonzahn systems...
December 2016: Journal of Advanced Prosthodontics
https://www.readbyqxmd.com/read/28007396/academy-of-dental-materials-guidance-on-in-vitro-testing-of-dental-composite-bonding-effectiveness-to-dentin-enamel-using-micro-tensile-bond-strength-%C3%AE-tbs-approach
#14
Steve Armstrong, Lorenzo Breschi, Mutlu Özcan, Frank Pfefferkorn, Marco Ferrari, Bart Van Meerbeek
OBJECTIVE: An ideal dental adhesive should provide retentive strength, marginal seal, be relatively simple to achieve and demonstrate clinical durability. Future improvements in adhesive bonding to tooth structure require in vitro test methods that provide reliable data for materials development and/or evaluation of experimental variables. The objective of this project was to identify a test method that is relatively easy to perform, repeatable and ultimately useful for predicting clinical outcomes...
December 19, 2016: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28001244/survival-analysis-of-banding-and-bonding-molar-tubes-in-adult-patients-over-a-12-month-period-a-split-mouth-randomized-clinical-trial
#15
Valéria Jacques Oeiras, Valéria Assis Almeida E Silva, Leidiana Aguiar Azevedo, Vanessa Soares Lobato, David Normando
This split-mouth randomized clinical trial aimed to compare the survival rate of bonding and banding molar tubes in adult orthodontic patients. Eligibility criteria included adults (aged >18 years), no active caries, restorations, or fractures in the upper and lower molars. The main outcome was any type of first-time failure in molar tubes. A computer-generated randomization scheme was used in a 1:1 ratio. The survival rate was estimated for 32 adult patients, in whom a tube was bonded to a molar tooth using composite resin on one side and a band was cemented with glass ionomer onto the same tooth in the contralateral arch...
December 22, 2016: Brazilian Oral Research
https://www.readbyqxmd.com/read/27996182/intrafibrillar-mineralization-of-polyacrylic-acid-bound-collagen-fibrils-using-a-two-dimensional-collagen-model-and-portland-cement-based-resins
#16
Shiyu Wu, Lisha Gu, Zihua Huang, Qiurong Sun, Huimin Chen, Junqi Ling, Sui Mai
The biomimetic remineralization of apatite-depleted dentin is a potential method for enhancing the durability of resin-dentin bonding. To advance this strategy from its initial proof-of-concept design, we sought to investigate the characteristics of polyacrylic acid (PAA) adsorption to desorption from type I collagen and to test the mineralization ability of PAA-bound collagen. Portland cement and β-tricalcium phosphate (β-TCP) were homogenized with a hydrophilic resin blend to produce experimental resins...
December 20, 2016: European Journal of Oral Sciences
https://www.readbyqxmd.com/read/27994324/push-out-bond-strength-of-different-translucent-fiber-posts-cemented-with-self-adhesive-resin-cement
#17
João Fernando Bazzo, Maria Beatriz Bergonse Pereira Pedriali, Ricardo Danil Guiraldo, Sandrine Bittencourt Berger, Sandra Kiss Moura, Rodrigo Varella de de Carvalho
PURPOSE: Evaluate the bond strength of different translucent fiber posts in the cervical, middle, and apical root thirds cemented with self-adhesive resin cement. MATERIALS AND METHODS: Sixty single-rooted teeth were randomly divided into five groups according to the fiber post used: Reforpost (opaque [control]), exacto, white post, radix, and Macro-Lock Illusion X-RO. The roots were subjected to chemomechanical preparation and cemented with self-adhesive resin cement...
November 2016: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/27994315/histological-evaluation-of-mineral-trioxide-aggregate-and-enamel-matrix-derivative-combination-in-direct-pulp-capping-an-in-vivo-study
#18
Indira Priyadarshini Bollu, L Deepa Velagula, Nagesh Bolla, K Kiran Kumar, Archana Hari, Jayaprakash Thumu
AIM: The aim of this study is to evaluate the response of human pulp tissue to mineral trioxide aggregate (MTA), Emdogain (EMD), and combination of MTA/EMD. MATERIALS AND METHODS: This study was performed on sixty intact first and second premolars of human maxillary and mandibular teeth. A standard pulpal exposure was done on all the teeth and was divided into three groups of twenty teeth each and was capped with MTA, EMD, and MTA/EMD combination. The final restoration was done with resin-modified glass ionomer cement...
November 2016: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/27994311/the-influence-of-the-lining-material-on-the-repair-of-the-infected-dentin-in-young-permanent-molars-after-restoration-a-randomized-clinical-trial
#19
Eunice Kuhn, Alessandra Reis, Ana Claudia Rodrigues Chibinski, Denise Stadler Wambier
AIM: This study evaluated the impact of liner material on the fluorescence, morphological and mineral characteristics of permanent carious dentin after cavity sealing. METHODS: Thirty children (11.0 ± 2.7 years old) presenting at least one active deep carious lesion in permanent molars were selected. Fragments of carious dentin were removed from teeth before lining the cavity (baseline samples) with high-viscosity glass ionomer cement (G1) or an inert material (wax - G2)...
November 2016: Journal of Conservative Dentistry: JCD
https://www.readbyqxmd.com/read/27994310/clinical-performance-of-class-i-nanohybrid-composite-restorations-with-resin-modified-glass-ionomer-liner-and-flowable-composite-liner-a-randomized-clinical-trial
#20
Krishtipati Suhasini, Koppolu Madhusudhana, Chinni Suneelkumar, Anumula Lavanya, K S Chandrababu, Perisetty Dinesh Kumar
BACKGROUND: Liners play a vital role in minimizing polymerization shrinkage stress by elastic bonding concept and increase the longevity and favorable outcome for composite restorations. AIMS: The aim of this study was to evaluate the clinical performance of nanohybrid composite restorations using resin-modified glass-ionomer and flowable composite liners. SETTINGS AND DESIGN: A single-centered, double-blinded randomized clinical trial, with split-mouth design and equal allocation ratio that was conducted in the Department of Conservative Dentistry and Endodontics...
November 2016: Journal of Conservative Dentistry: JCD
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