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https://www.readbyqxmd.com/read/28642930/a-novel-etching-technique-for-surface-treatment-of-zirconia-ceramics-to-improve-adhesion-of-resin-based-luting-cements
#1
Eystein Ivar Ruyter, Nalini Vajeeston, Torbjørn Knarvang, Ketil Kvam
Objectives: Bonding of zirconia crowns and bridges to abutments is important, not only bonding of the thin resin layer to the abutment, but also bonding to the zirconia ceramic is crucial. Both mechanical and chemical adhesion are desired. Mechanical retention of dental porcelain achieved by etching with moderately concentrated hydrofluoric acid is not possible with zirconia ceramics. The purpose of this study was to show that etching is possible with relative low melting fluoride compounds such as ammonium hydrogen difluoride and potassium hydrogen difluoride...
January 2017: Acta Biomaterialia Odontologica Scandinavica
https://www.readbyqxmd.com/read/28642057/novel-multifunctional-dental-cement-to-prevent-enamel-demineralization-near-orthodontic-brackets
#2
Yansong Ma, Ning Zhang, Michael D Weir, Yuxing Bai, Hockin H K Xu
OBJECTIVES: White spot lesions due to biofilm acid-induced enamel demineralization are prevalent in orthodontic treatments. The aim of this study was to develop a novel bioactive multifunctional cement with protein-repellent, antibacterial and remineralizing capabilities, and investigate the effects on enamel hardness and lesion depth in vitro for the first time. MATERIALS AND METHODS: 2-Methacryloyloxyethyl phosphorylcholine (MPC), dimethylaminohexadecyl methacrylate (DMAHDM), and nanoparticles of amorphous calcium phosphate (NACP) were incorporated into a resin-modified glass ionomer (RMGI)...
June 19, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28633093/fracture-resistance-of-ceramic-and-polymer-based-occlusal-veneer-restorations
#3
Majed Al-Akhali, Mohamed Sad Chaar, Adham Elsayed, Abdulaziz Samran, Matthias Kern
OBJECTIVES: The purpose of this in vitro study was to evaluate the influence of thermodynamic loading on the durability and fracture resistance behavior of occlusal veneers fabricated from different biomedical dental CAD/CAM materials. METHODS: The occlusal surfaces of 64 extracted premolars were prepared in the enamel layer and restored with occlusal veneers with a fissure/cusp thickness of 0.5/0.8mm made from four different dental CAD/CAM materials: group LD lithium disilicate (e...
June 13, 2017: Journal of the Mechanical Behavior of Biomedical Materials
https://www.readbyqxmd.com/read/28629032/effects-of-silane-modified-fillers-on-properties-of-dental-composite-resin
#4
Aysu Aydınoğlu, Afife Binnaz Hazar Yoruç
The effect of silanization on the mechanical, chemical, and physical properties of dental composites was investigated. Silica fillers were obtained from colloidal silica solution, Ludox® HS-40 and they were silanized by using 3-methacryloxypropyl trimethoxysilane (MPTMS) in an acidic media. Mineralogical and chemical structures of unsilanized and silanized fillers were determined by using XRD and FT-IR analyses. The modification of unsilanized/silanized fillers were investigated by performing XPS and TGA analyses...
October 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28626207/influence-of-polymerization-properties-of-4-meta-mma-based-resin-on-the-activity-of-fibroblast-growth-factor-2
#5
Haruaki Kitagawa, Kahoru Takeda, Ririko Tsuboi, Mikako Hayashi, Jun-Ichi Sasaki, Satoshi Imazato
Dental adhesive resins based on 4-methacryloxyethyl trimellitate anhydride (4-META)/methyl methacrylate (MMA) have been utilized for root-end filling and the bonding of fractured roots. To increase the success rate of these treatments, it would be beneficial to promote the healing of surrounding tissue by applying growth factors. In this study, the influences of the polymerization properties of 4-META/MMA-based resins on the activity of fibroblast growth factor-2 (FGF-2) were evaluated in vitro. The temperature increase caused by the heat generation during polymerization of the 4-META/MMA-based resin was insufficient to change the structure and function of FGF-2...
June 15, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28621273/choice-of-endodontic-fiber-posts-and-its-influence-on-dental-malpractice-an-in-vitro-evaluation
#6
Fouad Ayoub, Houssam Jassar, Hassan El Husseini, Ziad Salameh
AIMS AND OBJECTIVES: The fiber post type used in restoring endodontically treated teeth may affect the dental expert decision in the case of dental malpractice. The aim of this study was to evaluate the low-cost commercial fiber post in comparison with a higher cost or well-known documented fiber post system. MATERIALS AND METHODS: A total of 20 premolars were selected for the study; following endodontic treatment, specimens were randomly divided into two groups of 10 specimens each according to the type of fiber post used: (1) Low-cost commercial fiber post (OYAPost, Taper Lucent, OYARICOM) and (2) higher cost well-known fiber post (Rely X Fiber post, 3M ESPE)...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28616826/deposition-of-crystalline-hydroxyapatite-nano-particle-on-zirconia-ceramic-a-potential-solution-for-the-poor-bonding-characteristic-of-zirconia-ceramics-to-resin-cement
#7
Abbas Azari, Sakineh Nikzad, Arash Yazdani, Faezeh Atri, Abbas Fazel Anvari-Yazdi
The poor bonding strength of zirconia to different dental substrates is one of the challenging issues in restorative dentistry. Hydroxyapatite is an excellent biocompatible material with fine bonding properties. In this study, it was hypothesized that hydroxyapatite coating on zirconia would improve its bond strength. Forty-five zirconia blocks were prepared and randomly divided into three groups: hydroxyapatite coating, sandblasting, and no preparation (control). The blocks were bonded to cement and the micro-shear bond strength was measured following load application...
July 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28598181/a-new-method-for-deep-caries-treatment-in-primary-teeth-using-ozone-a-retrospective-study
#8
M Beretta, F Federici Canova
AIM: The aim of this study was to assess the effectiveness of a new protocol for deep caries treatment in deciduous teeth based on: 1) the incomplete removal of carious dentin tissue; 2) the use of new technology (ozone) for the disinfection of carious dentine; 3) the creation of a peripheral seal in healthy tissue for bonding procedures with rubber dam isolation. MATERIALS AND METHODS: From a personal database, authors selected 50 consecutive patients (28 males, 22 females; mean age 5...
June 2017: European Journal of Paediatric Dentistry: Official Journal of European Academy of Paediatric Dentistry
https://www.readbyqxmd.com/read/28590838/comparative-evaluation-of-effects-of-laser-modalities-on-shear-bond-strengths-of-veneering-porcelains-to-laser-sintered-substructures-an-in-vitro-study
#9
Oguzhan Gorler, Aysegul Goze Saygin
OBJECTIVE: Laser modalities and direct metal laser sintering (DMLS) have a potential to enhance micromechanical bonding between dental super- and infrastructures. However, the effect of different manufacturing methods on the metal-ceramic bond strength needs further evaluation. We investigated the effect of surface treatment with Er:YAG, Nd:YAG, and Ho:YAG lasers on the shear bond strength (SBS) of high-fusion dental porcelains (Vita and G-Ceram) to infrastructures prepared with DMLS in vitro settings...
June 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28587978/a-new-arginine-based-dental-adhesive-system-formulation-mechanical-and-anti-caries-properties
#10
Saulo Geraldeli, Eveline F Soares, Andres J Alvarez, Tanaz Farivar, Robert C Shields, Mario A C Sinhoreti, Marcelle M Nascimento
Secondary caries at the margins of composite restorations has been attributed to adhesive failure and consequent accumulation of cariogenic biofilms. OBJECTIVES: To develop and evaluate an etch-and-rinse adhesive system containing arginine for sustainable release and recharge without affecting its mechanical properties. Arginine metabolism by oral bacteria generates ammonia, which neutralizes glycolytic acids and creates a neutral environmental pH that is less favorable to the growth of caries pathogens, thus reducing the caries risk at the tooth-composite interface...
June 3, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28580464/addition-of-na2co3-improves-the-shelf-life-of-experimental-4-meta-self-etch-primer
#11
Hiro Matsumoto, Takatsugu Yamamoto, Masao Hanabusa, Yasuko Momoi, Tohru Hayakawa
PURPOSE: The objective of this study was to assess the influence of the addition of Na2CO3 on the shelf life and bond strength of 4-META self-etch primer. MATERIALS AND METHODS: Two 4-META self-etch primers were experimentally formulated with and without the addition of Na2CO3 (primer A and primer B, respectively). The primers were stored at 37°C for several periods of time after formulation. Clearfil SE Bond Primer (Kuraray Noritake Dental) was used as a control...
June 2, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28571484/sclerostin-deficiency-promotes-reparative-dentinogenesis
#12
A-M Collignon, N Amri, J Lesieur, J Sadoine, S Ribes, S Menashi, S Simon, A Berdal, G Y Rochefort, C Chaussain, C Gaucher
In humans, the SOST gene encodes sclerostin, an inhibitor of bone growth and remodeling, which also negatively regulates the bone repair process. Sclerostin has also been implicated in tooth formation, but its potential role in pulp healing remains unknown. The aim of this study was to explore the role of sclerostin in reparative dentinogenesis using Sost knockout mice ( Sost(-/-)). The pulps of the first maxillary molars were mechanically exposed in 3-mo-old Sost(-/-) and wild-type (WT) mice ( n = 14 mice per group), capped with mineral trioxide aggregate cement, and the cavities were filled with a bonded composite resin...
March 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28571262/evaluation-of-microleakage-with-total-etch-self-etch-and-universal-adhesive-systems-in-class-v-restorations-an-in-vitro-study
#13
Anjali Gupta, Pradeep Tavane, Pankaj Kumar Gupta, Bellam Tejolatha, Ashik Ali Lakhani, Ram Tiwari, Shruti Kashyap, Gaurav Garg
INTRODUCTION: Adhesive dentistry is overwhelmingly evolving with respect to the dental surgeon's and patient's perspective. Embracing the concept of minimally invasive dentistry which follows minimum intervention performed to produce good adhesion and tooth coloured restoration, in turn makes the newer generation bonding agents more acceptable and appropriate withstanding the demand for stable restoration. AIM: To study and compare the extent of microleakage between tooth and restoration interface in class V composite resin restorations applying one Total Etch (Adper(TM) single bond), two Self Etch (Adper(TM) SE Plus, Adper(TM) Easy One) and Universal bonding agents using dye penetration method...
April 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28569449/a-randomised-controlled-trial-of-a-nanofilled-composite-at-three-years-did-selective-enamel-etching-have-an-effect
#14
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/28566854/assessment-of-the-dental-and-skeletal-effects-of-fan-type-rapid-maxillary-expansion-screw-and-hyrax-screw-on-craniofacial-structures
#15
Umarevathi Gopalakrishnan, Premkumar Sridhar
AIMS AND OBJECTIVES: The purpose of the study was to assess the skeletal and dental effects of fan-type rapid maxillary expansion (RME) appliance and Hyrax RME appliance on the craniofacial structures. MATERIALS AND METHODS: The sample of the study included 12 patients with constricted maxillary arches. Acrylic bonded type of attachment was used for both groups. Changes in sagittal, vertical, and transverse relationship were assessed with lateral and frontal cephalograms, respectively...
January 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/28566845/prevention-and-treatment-of-white-spot-lesions-in-orthodontic-patients
#16
REVIEW
Maryam Khoroushi, Marzie Kachuie
Decalcification of enamel, appearing as white spot lesions (WSLs), around fixed orthodontic appliances is a major challenge during and after fixed orthodontic treatment by considering the fact that the goal of orthodontic treatment is to enhance facial and dental esthetic appearance. Banded or bonded teeth exhibit a significantly higher rate of WSLs compared to the controls with no braces as fixed appliances and the bonding materials promote retention of biofilms. These lesions are managed in the first step by establishing good oral hygiene habits and prophylaxis with topical fluorides, including high-fluoride toothpastes, fluoride mouthwashes, gels, varnishes, fluoride-containing bonding materials, and elastic ligatures...
January 2017: Contemporary Clinical Dentistry
https://www.readbyqxmd.com/read/28566673/resin-adhesion-strengths-to-zirconia-ceramics-after-primer-treatment-with-silane-coupling-monomer-or-oligomer
#17
Masahiro Okada, Kazusa Inoue, Masao Irie, Hiroaki Taketa, Yasuhiro Torii, Takuya Matsumoto
Resin bonding to zirconia ceramics is difficult to achieve using the standard methods for conventional silica-based dental ceramics, which employ silane coupling monomers as primers. The hypothesis in this study was that a silane coupling oligomer -a condensed product of silane coupling monomers- would be a more suitable primer for zirconia. To prove this hypothesis, the shear bond strengths between a composite resin and zirconia were compared after applying either a silane coupling monomer or oligomer. The shear bond strength increased after applying a non-activated ethanol solution of the silane coupling oligomer compared with that achieved when applying the monomer...
May 30, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28560816/scan-layered-reconstructions-a-pilot-study-of-a-nondestructive-dental-histoanatomical-analysis-method-and-digital-workflow-to-create-restorations-driven-by-natural-dentin-and-enamel-morphology
#18
João Malta Barbosa, Nick Tovar, Pablo A Tuesta, Ronaldo Hirata, Nuno Guimarães, José C Romanini, Marjan Moghadam, Paulo G Coelho, Leila Jahangiri
OBJECTIVE: This work aims to present a pilot study of a non-destructive dental histo-anatomical analysis technique as well as to push the boundaries of the presently available restorative workflows for the fabrication of highly customized ceramic restorations. MATERIALS AND METHODS: An extracted human maxillary central incisor was subject to a micro computed tomography scan and the acquired data was transferred into a workstation, reconstructed, segmented, evaluated and later imported into a Computer-Aided Design/Computer-Aided Manufacturing software for the fabrication of a ceramic resin-bonded prosthesis...
May 31, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/28554344/overview-of-nanoparticle-coating-of-dental-implants-for-enhanced-osseointegration-and-antimicrobial-purposes
#19
Feridoun Parnia, Javad Yazdani, Vahid Javaherzadeh, Solmaz Maleki Dizaj
PURPOSE: Nanomaterials are suitable candidates for coating of titanium based (Ti-based) dental implants due to their unique properties. The objective of this article is to summarize the application of nanoparticles as Ti-based implant coating materials in order to control and improve the implant success rate with focus on enhanced osseointegration and antimicrobial purposes. METHOD: This review was conducted using electronic databases and MeSH keywords to detect associated scientific literature published in English...
2017: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28545818/boron-nitride-nanotubes-as-novel-fillers-for-improving-the-properties-of-dental-adhesives
#20
Felipe Weidenbach Degrazia, Vicente Castelo Branco Leitune, Susana Maria Werner Samuel, Fabrício Mezzomo Collares
OBJECTIVE: This study aimed to evaluate the physical-chemical properties of experimental dental adhesives containing boron nitride nanotubes (BNNTs) as inorganic fillers. METHODS: An experimental adhesive resin was prepared using HEMA-BisGMA, 66/33wt% (control). Inorganic BNNT fillers were first analyzed using scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and then incorporated into the adhesive at different concentration (0.05, 0...
May 22, 2017: Journal of Dentistry
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