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https://www.readbyqxmd.com/read/29343187/mechanical-and-antibacterial-properties-of-benzothiazole-based-dental-resin-materials
#1
Wenbin Zhu, Chonghui Lao, Shuzhen Luo, Fang Liu, Qiting Huang, Jingwei He, Zhengmei Lin
A synthesized benzothiazole containing mono-methacrylate monomer BTTMA was incorporated into Bis-GMA/TEGDMA dental resin system with a series of mass concentration from 5 wt.% to 30 wt.% as an antibacterial agent. The influence of BTTMA on physicochemical properties of dental resin system, such as double bond conversion (DC), volumetric shrinkage (VS), flexural strength (FS) and modulus (FM), water sorption (WS) and solubility (SL) were investigated. Direct contact testing and agar diffusion testing were used to evaluate the antibacterial activity of BTTMA containing dental resin...
January 17, 2018: Journal of Biomaterials Science. Polymer Edition
https://www.readbyqxmd.com/read/29324684/comparative-effect-of-self-or-dual-curing-on-polymerization-kinetics-and-mechanical-properties-in-a-novel-dental-resin-based-composite-with-alkaline-filler-running-title-resin-composites-with-alkaline-fillers
#2
Nicoleta Ilie
Dental bulk-fill restorations with resin-composites (RBC) are increasing in popularity, but doubts concerning insufficient curing in depth still disconcert clinicians. An alternative might be offered by modern dual-cured RBCs, which additionally provide bioactive properties. This study assessed the impact of additional light-curing on polymerization kinetics, the degree of conversion (DC) and mechanical properties of a novel, dual-cured RBC with alkaline fillers. Since the bioactivity of a material often implies a release of compounds, the mechanical stability in simulated clinical environments was also evaluated...
January 11, 2018: Materials
https://www.readbyqxmd.com/read/29305689/effect-of-nanostructured-zirconium-dioxide-incorporation-in-an-experimental-adhesive-resin
#3
Camila Provenzi, Fabrício Mezzomo Collares, Marla Cuppini, Susana Maria Werner Samuel, Annelise Kopp Alves, Carlos Pérez Bergmann, Vicente Castelo Branco Leitune
OBJECTIVES: The aim of this study was to evaluate the influence of nanostructured zirconium dioxide incorporation in an experimental adhesive resin. METHODS: ZrO2 particles were characterized by X-ray diffraction (XRD), micro-Raman spectroscopy and Brunauer-Emmett-Teller (B.E.T). Experimental adhesive resins were formulated with 0, 0.5, 1, 4.8, and 9.1% ZrO2 in weight. The adhesives were evaluated based on degree of conversion (DC), radiopacity, softening in solvent and microtensile bond strength (μTBS) 24 h and after 1 year of aging...
January 5, 2018: Clinical Oral Investigations
https://www.readbyqxmd.com/read/29303416/application-of-plasma-sprayed-zirconia-coating-in-dental-implant-study-in-implant
#4
Zhengfei Huang, Zhifeng Wang, Chuanhua Li, Kaifeng Yin, Dan Hao, Jing Lan
The aim was to investigate the osseointegration of a novel coating-plasma-sprayed nanostructured zirconia (NSZ) in dental implant. Nanostructured zirconia coating on non-thread titanium implant was prepared by plasma spraying, the implant surface morphology, surface roughness and wettability were measured. In vivo, nanostructured zirconia-coated implants were inserted in rabbit tibia and animals were respectively sacrificed at 2, 4, 8 and 12 weeks after implantation. The bond strength between implant and bone was measured by removal torque (RTQ) test...
January 5, 2018: Journal of Oral Implantology
https://www.readbyqxmd.com/read/29301269/enhancing-of-osseointegration-with-propolis-loaded-tio%C3%A2-nanotubes-in-rat-mandible-for-dental-implants
#5
Nithideth Somsanith, Yu-Kyoung Kim, Young-Seok Jang, Young-Hee Lee, Ho-Keun Yi, Jong-Hwa Jang, Kyoung-A Kim, Tae-Sung Bae, Min-Ho Lee
TiO₂ nanotubes (TNT) formation is beneficial for improving bone cell-material interaction and drug delivery for Ti dental implants. Among the natural drugs to be installed in TNT, selected propolis has antibacterial and anti-inflammatory properties. It is a resinous natural product which is collected by the honeybees from the various types of plants with their salivary enzymes. This study concludes that TNT loaded with a propolis (PL-TNT-Ti) dental implant has the ability to improve osseointegration. The propolis particles were embedded within the TNT or adhered to the top...
January 1, 2018: Materials
https://www.readbyqxmd.com/read/29299191/comparison-of-two-different-debonding-techniques-in-orthodontic-treatment
#6
Luca Piccoli, Guido Migliau, Laith Konstantinos Besharat, Stefano Di Carlo, Giorgio Pompa, Roberto Di Giorgio
Aim: The purpose of this research is to investigate whether and how the adhesive bond failure site varied in relation to the material used for the orthodontic bonding and debonding technique applied. Materials and methods: Two different methods of orthodontic debonding were included in our survey; cutters for orthodontics and debonding plier. Three different materials for the adhesion of the bracket: composite light curing, self-curing composite and glass ionomer cement...
April 2017: Annali di Stomatologia
https://www.readbyqxmd.com/read/29298403/intrapulpal-temperature-increases-caused-by-445-nm-diode-laser-assisted-debonding-of-self-ligating-ceramic-brackets-during-simulated-pulpal-fluid-circulation
#7
Steffen Stein, Johannes Wenzler, Andreas Hellak, Michael Schauseil, Heike Korbmacher-Steiner, Andreas Braun
OBJECTIVE: This study investigated temperature increases in dental pulp resulting from laser-assisted debonding of ceramic brackets using a 445-nm diode laser. MATERIALS AND METHODS: Eighteen ceramic brackets were bonded in standardized manner to 18 caries-free human third molars. Pulpal fluid circulation was simulated by pumping distilled water at 37°C through the pulp chamber. The brackets were irradiated with a 445-nm diode laser. Temperatures were measured using a thermal camera at points P1 (center of the pulp) and P2 (in the hard dental tissue) at the baseline (T0), at the start and end of laser application (T1 and T2), and the maximum during the sequence (Tmax)...
January 3, 2018: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/29286181/accuracy-of-different-implant-impression-techniques-evaluation-of-new-tray-design-concept
#8
David Yu Liu, Fathima Nashmie Cader, Jaafar Abduo, Joseph Palamara
PURPOSE: To evaluate implant impression accuracy with a new tray design concept in comparison to nonsplinted and splinted impression techniques for a 2-implant situation. MATERIALS AND METHODS: A reference bar titanium framework was fabricated to fit on 2 parallel implants. The framework was used to generate a resin master model with 2 implants that fit precisely against the framework. Three impression techniques were evaluated: (1) nonsplinted, (2) splinted, and (3) nonsplinted with modified tray impressions...
December 29, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/29285469/bonding-system-choice-and-practices-among-senior-dental-students
#9
Hani Nassar, Hassan El-Shamy
Aim and Objective: This survey investigated bonding system type and composite application rationale by senior dental students at a dental school in Saudi Arabia. Materials and Methods: Eighty-three questionnaires with 15 open and closed questions were randomly distributed to final year dental students about the use of etch and rinse versus self-etch adhesives and application techniques for posterior resin composite. Data were collected, and statistical analysis was done using Chi-square test (0...
November 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/29284956/effect-of-surface-modifications-on-the-retention-of-cement-retained-implant-crowns-under-fatigue-loads-an-in-vitro-study
#10
R Ajay, K Suma, Seyed Asharaf Ali, Jambai Sampath Kumar Sivakumar, V Rakshagan, V Devaki, K Divya
Background: Masticatory forces cause fatigue to the dental luting agents, adversely affecting the retention of these cement-retained crowns. Sandblasting (SB) and diamond abrading the abutment surface improves the bond strength of luting agents. However, the effect of acid etching (AE) on the implant abutment surface and the effect of other surface modifications under masticatory load are yet to be documented. Purpose: The aim of the study was to evaluate the effect of abutment surface modifications on the retention of cement-retained restorations subjected to cyclic fatigue loads...
November 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/29284950/effect-of-biomineralization-ability-on-push-out-strength-of-proroot-mineral-trioxide-aggregate-mineral-trioxide-aggregate-branco-and-calcium-phosphate-cement-on-dentin-an-in-vitro-evaluation
#11
Vanita D Revankar, M S Prathap, K Harish Kumar Shetty, Azmin Shahul, K Sahana
Context: Biomineralization is a process which leads to the formation of an interfacial layer with tag-like structures at the cement-dentin interface. It is due to interaction of mineral trioxide aggregate (MTA) and Portland cement with dentin in phosphate-buffered solution (PBS). This study is aimed to evaluate the effect of influence of biomineralization process on push-out bond strength of ProRoot MTA (Dentsply Tulsa Dental, Tulsa, OK, USA), MTA Branco (Angelus Soluc¸o˜es Odontolo´gicas, Londrina, PR, Brazil) and calcium phosphate cement (BioGraft CPC)...
November 2017: Journal of Pharmacy & Bioallied Sciences
https://www.readbyqxmd.com/read/29284105/a-novel-enamel-and-dentin-etching-protocol-using-%C3%AE-hydroxy-glycolic-acid-surface-property-etching-pattern-and-bond-strength-studies
#12
D Cecchin, A P Farina, Cmp Vidal, A K Bedran-Russo
OBJECTIVES: To determine the use of α-hydroxy glycolic acid (GA) as a surface pretreatment for dental restorative applications. The etching pattern of GA pretreatment of dental hard tissues was assessed by surface microhardness and scanning electron microscopy (SEM). The effectiveness of GA surface etching on the enamel and dentin resin bond strengths was assessed using two etchant application modes (rubbing and no rubbing) and three adhesive systems (Single Bond [SB], One Step Plus [OSP], and Scotchbond Universal [SBU])...
January 2018: Operative Dentistry
https://www.readbyqxmd.com/read/29282852/tooth-injuries-knowledge-of-parents-of-public-school-students-from-the-city-of-alfenas-minas-gerais-brazil
#13
Leopoldo Cosme-Silva, Leandro Araújo Fernandes, Eliana Rodrigues Rosselli, Wilson Roberto Poi, Natália da Silva Martins, Daniela Coelho de Lima
BACKGROUND/AIMS: The prognosis of traumatized teeth can be optimized if appropriate procedures are following at the time of the accident. The aim of this study was to evaluate the level of knowledge of students' parents from a group of Brazilian schools regarding fracture and tooth avulsion in permanent teeth METHODS: Parents of 802 students were interviewed using a pre-tested questionnaire designed to explore how they would manage their child's dental avulsion or fracture. RESULTS: Among the parents, 8...
December 28, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/29282849/laser-assisted-removal-of-all-ceramic-fixed-dental-prostheses-a-comprehensive-review
#14
REVIEW
Sergio Varela Kellesarian, Vanessa Ros Malignaggi, Khaled M Aldosary, Fawad Javed
OBJECTIVE: The aim of this comprehensive review was to assess the effectiveness of erbium lasers in the removal of all ceramic fixed dental prostheses (FDPs). OVERVIEW: Indexed databases were searched without language or time restriction up to and including December 2017 using different combinations of the following keywords: "lasers"; "phototherapy"; "crowns"; "prostheses and implants"; "inlays"; "ceramics"; "dental porcelain"; "zirconium"; "removal"; "debonding"; "fixed dental prostheses"; "veneers"; "laminates"; and "fixed bridge...
December 28, 2017: Journal of Esthetic and Restorative Dentistry
https://www.readbyqxmd.com/read/29276777/patient-centered-dentinal-hypersensitivity-treatment-outcomes-results-from-the-national-dental-pbrn
#15
M W Heft, M S Litaker, D T Kopycka-Kedzierawski, C Meyerowitz, S Chonowski, R L Yardic, V V Gordan, R Mungia, G H Gilbert
Dentinal hypersensitivity (DH) can have a significant impact on oral health and functioning, and it is a clinical symptom commonly managed by dentists during routine clinical practice. DH symptoms are typically elicited by otherwise innocuous, nonpainful stimuli applied to exposed dentin (e.g., tactile stimuli, warming or cooling temperatures or air puffs). Treatment approaches have sought to directly target the dentinal pulp tissues or close dentinal tubules via dental office care and treatment services (fluoride varnishes, glutaraldehydes, bonding agents, sealants, oxalates, or lasers) or home care services (toothpastes or dentifrices containing fluoride or potassium nitrate compounds)...
January 2018: JDR Clinical and Translational Research
https://www.readbyqxmd.com/read/29275438/effect-of-hydrophobic-surface-treated-fumed-silica-fillers-on-a-one-bottle-etch-and-rinse-model-dental-adhesive
#16
Jing Wang, Qingsong Yu, Zhiyuan Yang
The objective of this study was to investigate the effect of hydrophobic surface treatment to fumed silica fillers on the bonding performance of a one-bottle etch and rinse model dental adhesive. In this study, 0.5-5 wt.% of Filler 1 and Filler 2 were loaded into BisGMA/HEMA model dental adhesive. Filler 1 was not treated, while Filler 2 was surface treated with a dimethyl silicone fluid making the silica extremely hydrophobic. The prepared adhesives were characterized through measurements of viscosity, degree of conversion, and water contact angle...
December 23, 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/29275170/complete-rehabilitation-of-compromised-full-dentitions-with-adhesively-bonded-all-ceramic-single-tooth-restorations-long-term-outcome-in-patients-with-and-without-amelogenesis-imperfecta
#17
Andrea Klink, Martin Groten, Fabian Huettig
OBJECTIVES: This clinical follow-up evaluated the long-term outcome of full-mouth rehabilitations with adhesively bonded all-ceramic restorations in patients suffering from amelogenesis imperfecta (AI) or affected by extensive tooth wear including a loss of the vertical dimension of occlusion. MATERIALS AND METHODS: Included for evaluation were all patients treated with adhesively bonded monolithic single-tooth restorations made of silicate or lithium disilicate ceramics; allowing a maximum four missing teeth and a facial feldspathic veneering of LDS anterior crowns...
December 21, 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/29249574/ultimate-force-and-stiffness-of-2-piece-zirconium-dioxide-implants-with-screw-retained-monolithic-lithium-disilicate-reconstructions
#18
Tim Joda, Benjamin Voumard, Philippe K Zysset, Urs Brägger, Marco Ferrari
PURPOSE: The aims were to analyze stiffness, ultimate force, and failure modes of a 2-piece zirconium dioxide (ZrO2) implant system. METHODS: Eleven 2-piece ZrO2 implants, each mounted with ZrO2 abutments plus bonded monolithic lithium disilicate (LS2) restorations, were grouped for 3.3mm (A) and 4.1mm (B) diameter samples. Quasi-static load was monotonically applied under a standardized test set-up (loading configuration according to DIN ISO 14801). The ultimate force was defined as the maximum force that implants are able to carry out until fracture; stiffness was measured as the maximum slope during loading...
December 14, 2017: Journal of Prosthodontic Research
https://www.readbyqxmd.com/read/29246413/low-certainty-evidence-suggests-high-5-year-survival-rate-of-all-ceramic-resin-bonded-fixed-dental-prostheses-and-framework-design-and-ceramic-material-may-be-associated-with-survival-and-complication-rates
#19
https://www.readbyqxmd.com/read/29244887/carbon-fiber-framework-for-full-arch-implant-supported-fixed-dental-prostheses-supporting-resin-based-composite-and-lithium-disilicate-ceramic-crowns-case-report-and-description-of-features
#20
Giuseppe Castorina
This case report presents a new approach for shock-absorbing carbon-fiber composite frameworks for full-arch implant-supported fixed dental prostheses supporting resin-based and lithium disilicate ceramic crowns. It describes the characteristics of the materials used, the procedures for implementing the framework, and the requirements to achieve the best mechanical and clinical properties. The result is a full-arch prosthesis with masticatory load shock-absorption capacities, chemical bonding between materials, good esthetics, and wear similar to natural enamel...
December 15, 2017: International Journal of Periodontics & Restorative Dentistry
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