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https://www.readbyqxmd.com/read/28822581/favorable-residual-stress-induction-by-resin-cementation-on-dental-porcelain
#1
Garry J P Fleming, Xu Cao, Dan L Romanyk, Owen Addison
OBJECTIVES: Despite developments in polycrystalline ceramics, glassy dental-ceramic materials provide the optimum cosmetic option in most clinical situations to mimic the natural dentition. The clinical success of glassy dental-ceramic materials is often attributed to resin-adhesive bonding techniques. In this study we explore whether shrinkage stresses generated on photo-polymerisation of the resin-cement are sufficient to induce ceramic surface defect stabilization, and we quantify the transient nature of the induced stresses...
August 16, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28822139/confocal-raman-mapping-of-collagen-cross-link-and-crystallinity-of-human-dentin-enamel-junction
#2
Amel Slimani, Fares Nouioua, Alban Desoutter, Bernard Levallois, Frédéric J G Cuisinier, Hervé Tassery, Elodie Terrer, Hamideh Salehi
The separation zone between enamel and dentin [dentin-enamel junction (DEJ)] with different properties in biomechanical composition has an important role in preventing crack propagation from enamel to dentin. The understanding of the chemical structure (inorganic and organic components), physical properties, and chemical composition of the human DEJ could benefit biomimetic materials in dentistry. Spatial distribution of calcium phosphate crystallinity and the collagen crosslinks near DEJ were studied using confocal Raman microscopy and calculated by different methods...
August 2017: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/28815240/-research-on-physical-and-mechanical-properties-crown-accuracy-by-using-self-made-fus-invest-dental-investment
#3
Jin-Shuang Wu, He-Lin Xing, Chao-Fang Dong, Tian-Wen Guo, Se-Fei Yang
PURPOSE: To evaluate the physical and mechanical properties of pure titanium castings cast by self- made FUS-invest dental investment, and evaluate casting accuracy. METHODS: Seven pure titanium castings were cast by self-made FUS-invest zirconium investment and analyzed using servo hydraulic dynamic experiment system (JJG139-83 standard), scanning electron microscope and energy spectrum analysis. Thirty-eight crowns of pure titanium were cast by two different methods...
April 2017: Shanghai Kou Qiang Yi Xue, Shanghai Journal of Stomatology
https://www.readbyqxmd.com/read/28814864/controlled-release-of-lovastatin-from-poly-lactic-co-glycolic-acid-nanoparticles-for-direct-pulp-capping-in-rat-teeth
#4
Hung-Pin Lin, Han-Ping Tu, Yu-Ping Hsieh, Bor-Shiunn Lee
Statin at appropriate concentrations has been shown to induce odontoblastic differentiation, dentinogenesis, and angiogenesis. However, using a carrier to control statin release might reduce toxicity and enhance its therapeutic effects. The aim of this study was to prepare poly(d,l-lactide-co-glycolide acid) (PLGA) nanoparticles that contain lovastatin for application in direct pulp capping. The PLGA-lovastatin particle size was determined using dynamic light scattering measurements and transmission electron microscopy...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28808633/comparing-the-effect-of-a-desensitizing-material-and-a-self-etch-adhesive-on-dentin-sensitivity-after-periodontal-surgery-a-randomized-clinical-trial
#5
Hila Hajizadeh, Atefeh Nemati-Karimooy, Sara Majidinia, Amir Moeintaghavi, Marjaneh Ghavamnasiri
OBJECTIVES: This double-blind randomized placebo-controlled clinical trial evaluated the ability of a desensitizing agent and a self-etch adhesive on cervical dentin sensitivity (CDS) after periodontal surgery. MATERIALS AND METHODS: Ninety hypersensitive teeth of 13 subjects were included in the study. After periodontal surgery, the teeth of each posterior sextant treated with one of the following materials: G1: Clearfil S(3) Bond (Kuraray Dental), G2: Gluma Desensitizer (Heraeus Kulzer), and G3: placebo (water)...
August 2017: Restorative Dentistry & Endodontics
https://www.readbyqxmd.com/read/28808457/physicochemical-properties-of-mta-and-portland-cement-after-addition-of-aloe-vera
#6
Alvaro Henrique Borges, Orlando Aguirre Guedes, Luiz Evaristo Ricci Volpato, Gilberto Siebert Filho, Alexandre Meireles Borba, Omar Zina, Evandro Piva, Carlos Estrela
INTRODUCTION: The aim of this in vitro study was to determine the liquid-powder ratio, setting time, solubility, dimensional change, pH, and radiopacity of white structural and non-structural Portland cement, ProRoot MTA and MTA Bio, associated with a 2% glycolic solution containing Aloe Vera, as vehicle. METHODS AND MATERIALS: Five samples of each material were used for each test, according to the American National Standards Institute/American Dental Association (ANSI/ADA) specification No...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28807329/impact-of-thio-urethane-additive-and-filler-type-on-light-transmission-and-depth-of-polymerization-of-dental-composites
#7
André Luis Faria-E-Silva, Carmem Silvia Pfeifer
OBJECTIVE: This study evaluated the effects of filler type and the addition of thio-urethane oligomers on light-transmission, polymerization kinetics and depth of cure of resin composites. METHODS: BisGMA:UDMA:TEGMA (5:3:2wt%) were mixed with 0 (control) or 20wt% thio-urethane. Fillers with various sizes and refractive indices were included and refractive index (RI) measured. Unfilled resins were used as controls. The RIs of materials were measured before and after polymerization...
August 11, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28806430/a-randomized-controlled-trial-of-mastication-with-complete-dentures-made-by-a-conventional-or-an-abbreviated-technique
#8
Cristiane Machado Mengatto, Gustavo Hauber Gameiro, Mario Brondani, C Peter Owen, Michael I MacEntee
PURPOSE: The aim of this randomized clinical trial was to test the hypothesis that there are no statistically significant differences after 3 and 6 months in masticatory performance or chewing ability of people with new complete dentures made by an abbreviated or a conventional technique. MATERIALS AND METHODS: The trial included 20 edentulous participants at a dental school in Brazil assigned randomly to receive dentures made by either a conventional technique involving six clinical sessions or by an abbreviated technique involving three clinical sessions...
August 14, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28806427/fixed-dental-prostheses-and-single-tooth-crowns-based-on-ceria-stabilized-tetragonal-zirconia-alumina-nanocomposite-frameworks-outcome-after-2-years-in-a-clinical-trial
#9
Fabian Hüttig, Jan P Keitel, Andreas Prutscher, Sebastian Spintzyk, Andrea Klink
PURPOSE: This clinical trial tested bilayered restorations based on ceria-stabilized tetragonal zirconia/alumina frameworks veneered with feldspathic ceramic. MATERIALS AND METHODS: A total of 67 crowns and 40 fixed dental prostheses (FDPs) were luted in 57 patients with self-etching/self-adhesive composite resin cement. Dental status and integrity of restorations were evaluated at 2 weeks, 6 months, and then annually. RESULTS: A total of 66 crowns and 36 FDPs (88% posterior) survived for success rates of 93...
August 14, 2017: International Journal of Prosthodontics
https://www.readbyqxmd.com/read/28802762/clinical-application-of-autogenous-partially-demineralized-dentin-matrix-prepared-immediately-after-extraction-for-alveolar-bone-regeneration-in-implant-dentistry-a-pilot-study
#10
T Minamizato, T Koga, Takashi I, Y Nakatani, M Umebayashi, Y Sumita, T Ikeda, I Asahina
The aim of this study was to examine the efficacy and safety of autogenous partially demineralized dentin matrix (APDDM) prepared onsite, for clinical application in bone regeneration procedures related to implant dentistry, including socket preservation, alveolar ridge augmentation, and maxillary sinus floor augmentation. In this study, 16 patients underwent dental implant placement using APDDM transplantation. There were no systemic or local complications (including surgical site infection) in any of the cases, and oral rehabilitation using dental implants was successful in all cases for at least 2 years after attachment of the suprastructure...
August 9, 2017: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28798441/minimal-intervention-management-of-the-older-patient
#11
L J Walsh
With an aging population, dentists need to be aware of the risks which come to their elderly patients from retained teeth and exposed root surfaces. Oral health problems in the later years of life are multifactorial, with lifestyle, plaque and salivary factors remaining paramount. Root surface caries is likely to present a challenge in patients with a strong history of past coronal caries (and who have the attendant lifestyle risk factors) as well as in elderly patients who suddenly develop salivary hypofunction...
August 11, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28798421/remineralisation-the-buzzword-for-early-mi-caries-management
#12
B T Amaechi
Minimal intervention (MI) dentistry aims to preserve dental tissues first and restore only when indicated, thus remineralisation of initial (non-cavitated) caries lesions, an integral part of caries management, is an essential treatment strategy in MI. With this understanding, dental practitioners are increasingly embracing the principle of non-operative treatment of initial caries lesions. The purpose of this review was to summarise the most recent literature published in non-operative management of dental caries...
August 11, 2017: British Dental Journal
https://www.readbyqxmd.com/read/28791830/zirconium-the-material-of-the-future-in-modern-implantology
#13
REVIEW
Paweł Kubasiewicz-Ross, Marzena Dominiak, Tomasz Gedrange, Ute U Botzenhart
The authors present the contemporary state of knowledge concerning alternative materials for dental implantology. First of all, factors influencing osseointegration are stated. The most important factors seem to be the type of implant surface. Among the numerous parameters describing them, the most important are: average roughness and porous density. Some studies proved that materials with comparable surface roughness provide similar osseointegration. In modern implantology titanium is the material still considered as a "gold standard"...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28791813/an-evaluation-of-selected-oral-health-indicators-and-cariogenic-bacteria-titer-in-patients-with-helicobacter-pylori
#14
Jakub Urban, Rafał Koszowski, Anna Płachetka, Andrzej Wiczkowski
BACKGROUND: Studies based on polymerase chain reaction (PCR) techniques indicate that Helicobacter pylori can be constantly or temporarily present in the oral cavity in virulent or non-virulent form. Streptococcus mutans exerts a strong inhibitory effect on H. pylori. OBJECTIVES: The aim of the present study was to investigate the prevalence and virulence of H. pylori in the oral cavity and the correlation of these factors with oral health and cariogenic bacteria titer...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28791302/in-vitro-laser-treatment-platform-construction-with-dental-implant-thread-surface-on-bacterial-adhesion-for-peri-implantitis
#15
Hsien-Nan Kuo, Hsiang-I Mei, Tung-Kuan Liu, Tse-Ying Liu, Lun-Jou Lo, Chun-Li Lin
This study constructs a standard in vitro laser treatment platform with dental implant thread surface on bacterial adhesion for peri-implantitis at different tooth positions. The standard clinical adult tooth jaw model was scanned to construct the digital model with 6 mm bone loss depth on behalf of serious peri-implantitis at the incisor, first premolar, and first molar. A cylindrical suite connected to the implant and each tooth root in the jaw model was designed as one experimental unit set to allow the suite to be replaced for individual bacterial adhesion...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28791277/the-rate-and-stability-of-mandibular-block-bone-graft-in-recent-5%C3%A2-years
#16
Jong-Cheol Park, Yun-Ho Kim, Hong-Seok Choi, Jong-Shik Oh, Sang-Hun Shin, Yong-Deok Kim
BACKGROUND: The purposes of the present study were to compare implant stabilities of mandibular block bone graft and bovine bone graft and to evaluate influencing factors for implant stability in mandibular block bone (MBB) graft. METHODS: This retrospective study investigated 1224 cases and 389 patients treated by one surgeon in the Department of Oral and Maxillofacial Surgery of Pusan National University Dental Hospital (Yangsan, Korea) between January 2010 and December 2014...
December 2017: Maxillofacial Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28783506/nanoscale-silver-depositions-inhibit-microbial-colonization-and-improve-biocompatibility-of-titanium-abutments
#17
Supriya Kheur, Nimisha Singh, Dhananjay Bodas, Jean-Yves Rauch, Shantanu Jambhekar, Mohit Kheur, Jyutika Rajwade
Although titanium dental implants are biocompatible, exhibit excellent corrosion resistance and high mechanical resistance, the material fails in providing resistance to infection because it exhibits poor antimicrobial activity. To address these issues, we deposited silver onto titanium abutments (Grade 5 titanium discs) using direct current (DC) sputtering and assessed the antimicrobial activity and biocompatibility of the modified implant material. Atomic absorption spectrometry and X-ray photoelectron spectroscopy were employed to investigate the concentration and elemental composition of the deposited silver...
July 29, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28782290/risk-of-subsequent-attention-deficit-hyperactivity-disorder-among-children-and-adolescents-with-amalgam-restorations-a-nationwide-longitudinal-study
#18
Po-Yen Lin, Jui Wang, Yu-Chih Chiang, Chen-Yin Lai, Hong-Ji Chang, Lin-Yang Chi
OBJECTIVES: Dental amalgam has been used as a common restorative material since the 1800s, but concerns have been raised regarding its purported neuropsychological effects due to the neurotoxicity of mercury. In this study, a nationwide population-based database was employed to investigate the association of dental amalgam restoration with the risk of attention-deficit/hyperactivity disorder (ADHD). METHODS: After matching, 88 068 young people with at least one tooth restoration during 2002-2010 and no ADHD history before 2001 were selected and then collected the further information until the end of 2011...
August 7, 2017: Community Dentistry and Oral Epidemiology
https://www.readbyqxmd.com/read/28779891/silver-nanoparticles-in-dentistry
#19
REVIEW
Victor T Noronha, Amauri J Paula, Gabriela Durán, Andre Galembeck, Karina Cogo-Müller, Michelle Franz-Montan, Nelson Durán
OBJECTIVE: Silver nanoparticles (AgNPs) have been extensively studied for their antimicrobial properties, which provide an extensive applicability in dentistry. Because of this increasing interest in AgNPs, the objective of this paper was to review their use in nanocomposites; implant coatings; pre-formulation with antimicrobial activity against cariogenic pathogens, periodontal biofilm, fungal pathogens and endodontic bacteria; and other applications such as treatment of oral cancer and local anesthesia...
August 2, 2017: Dental Materials: Official Publication of the Academy of Dental Materials
https://www.readbyqxmd.com/read/28777510/the-historical-evolution-of-dental-impression-materials
#20
Ioannis Papadiochos, Sofia Papadiochou, Ioannis Emmanouil
The concept of impression making process in dentistry began in the mid 1800s. Dentists realized that the construction of a prosthetic restoration required both a detailed capture of the oral tissues along with stone cast fabrications. To accomplish these goals, impression materials were essential. Beeswax represents the first impression material, while important bechmarks during the historical evolution of dental impression materials are considered to be the introduction of dental trays in the early 1800s and the invention of the gutta-percha, thermoplastic resins and plaster of Paris...
July 2017: Journal of the History of Dentistry
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