7,223 results match your criteria properties restorative

Inhibition of SARS-CoV-2 main protease: a repurposing study that targets the dimer interface of the protein.

J Biomol Struct Dyn 2021 Apr 13:1-16. Epub 2021 Apr 13.

Regenerative and Restorative Medicine Research Center (REMER), Research Institute for Health Sciences and Technologies (SABITA), Istanbul Medipol University, Istanbul, Turkey.

Coronavirus disease-2019 (COVID-19) was firstly reported in Wuhan, China, towards the end of 2019, and emerged as a pandemic. The spread and lethality rates of the COVID-19 have ignited studies that focus on the development of therapeutics for either treatment or prophylaxis purposes. In parallel, drug repurposing studies have also come into prominence. Read More

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Development and characterization of self-etching adhesives doped with 45S5 and niobophosphate bioactive glasses: Physicochemical, mechanical, bioactivity and interface properties.

Dent Mater 2021 Apr 10. Epub 2021 Apr 10.

Discipline of Dental Materials, School of Dentistry, Federal University of Maranhão (UFMA), Av. dos Portugueses, 1966, 65080-805 São Luís, Maranhão, Brazil. Electronic address:

Objective: The aim of study was to develop and characterize experimental bioactive glasses (45S5 and niobophosphate bioactive glass (NbG)) and evaluate the effects of their addition in self-etching adhesive systems on physicochemical, mechanical, and bioactive properties, microtensile bond strength (μTBS), and nanoleakage (NL).

Methods: Two-step self-etching adhesive systems containing 5, 10, and 20 wt.% of 45S5 and NbG bioactive glasses were developed. Read More

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Effect of Diabetes on Rotary Instrumentation of Dentin.

J Endod 2021 Apr 9. Epub 2021 Apr 9.

Associate Professor and Chairman, Department of Endodontics, Rutgers School of Dental Medicine, Newark, NJ.

Introduction: Diabetes Mellitus (DM) may affect the physical and mechanical properties of dentin, which could potentially have an impact on root canal procedures. This study aimed to compare the amount of dentin removed by an endodontic rotary file, comparing dentin from diabetic patients to dentin from control patients under laboratory conditions.

Methods: The amount of dentin removed was tested using new F2 ProTaper files applied against the surface of prepared dentin disks for three different groups; diabetic type I (D1), diabetic type II (D2), and non-diabetic (Normal). Read More

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Fracture load of zirconia implant supported CAD/CAM resin crowns and mechanical properties of restorative material and cement.

J Prosthodont Res 2021 Apr 9. Epub 2021 Apr 9.

Biomaterials and Technology, Department of Reconstructive Dentistry, University Center for Dental Medicine, University of Basel, Basel.

Purpose: To test if resin CAD/CAM materials should be considered for zirconia implants and how their mechanical properties affect the fracture load.

Methods: Fracture load of molar crowns of CAD/CAM materials (VITA CAD-Temp [CT], Cerasmart [CS], Lava Ultimate [LU], Pekkton Ivory [PK]) on zirconia implants (ceramic.implant, 4. Read More

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Toughening and polymerization stress control in composites using thiourethane-treated fillers.

Sci Rep 2021 Apr 7;11(1):7638. Epub 2021 Apr 7.

Division of Biomaterials and Biomechanics, Department of Restorative Dentistry, Oregon Health & Science University, Portland, OR, USA.

Filler particle functionalization with thiourethane oligomers has been shown to increase fracture toughness and decrease polymerization stress in dental composites, though the mechanism is poorly understood. The aim of this study was to systematically characterize the effect of the type of filler surface functionalization on the physicochemical properties of experimental resin composites containing fillers of different size and volume fraction. Barium glass fillers (1, 3 and 10 µm) were functionalized with 2 wt% thiourethane-silane (TU-Sil) synthesized de novo and characterized by thermogravimetric analysis. Read More

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Long-Term Success of All-Ceramic Dental Implants Compared with Titanium Implants.

J Long Term Eff Med Implants 2021 ;31(1):73-89

Department of Preventive and Restorative Dental Sciences, School of Dentistry, University of California, San Francisco School of Dentistry, San Francisco, CA 94143-0758.

All-ceramic dental implants have been identified as a potential alternative to the traditional titanium-based implant systems used in dentistry to satisfy the demands for esthetic metal-free treatment of edentulous jaws. Among the all-ceramic implants introduced in dentistry, zirconia implants have emerged as the forerunner. The success of zirconia as an implant material has paralleled that of titanium in the short-term, however, few clinical studies assess success in the long-term. Read More

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January 2021

Surface roughness, plaque accumulation, and cytotoxicity of provisional restorative materials fabricated by different methods.

PLoS One 2021 5;16(4):e0249551. Epub 2021 Apr 5.

Department of Prosthodontics, Biomaterials Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Fars, Iran.

Fabricating method may affect the surface properties and biological characteristics of provisional restorations. This study aimed to evaluate the surface roughness, plaque accumulation, and cytotoxicity of provisional restorative materials fabricated by the conventional, digital subtractive and additive methods. Sixty-six bar-shaped specimens (2×4×10 mm) were fabricated by using provisional restorative materials through the conventional, digital subtractive and additive methods (n = 22 per group). Read More

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The Effect of Liquid Rubber Addition on the Physicochemical Properties, Cytotoxicity, and Ability to Inhibit Biofilm Formation of Dental Composites.

Materials (Basel) 2021 Mar 30;14(7). Epub 2021 Mar 30.

Chair and Department of Biochemistry and Biotechnology, Medical University of Lublin, Lublin, Chodźki 1, 20-093 Lublin, Poland.

The aim of this study was to evaluate the effect of modification with liquid rubber on the adhesion to tooth tissues (enamel, dentin), wettability and ability to inhibit bacterial biofilm formation of resin-based dental composites. Two commercial composites (Flow-Art-flow type with 60% ceramic filler and Boston-packable type with 78% ceramic filler; both from Arkona Laboratorium Farmakologii Stomatologicznej, Nasutów, Poland) were modified by addition of 5% by weight (of resin) of a liquid methacrylate-terminated polybutadiene. Results showed that modification of the flow type composite significantly ( < 0. Read More

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Characterization of an Experimental Two-Step Self-Etch Adhesive's Bonding Performance and Resin-Dentin Interfacial Properties.

Polymers (Basel) 2021 Mar 25;13(7). Epub 2021 Mar 25.

Department of Restorative Dentistry, Graduate School of Dental Medicine, Hokkaido University, Kita 13, Nishi 7, Kita-ku, Sapporo 060-8586, Japan.

This study evaluated an experimental two-step self-etch adhesive (BZF-29, BZF) by comparing it with a reference two-step self-etch adhesive (Clearfil Megabond 2, MB) and a universal adhesive (G-Premio Bond, GP) for microtensile bond strength (μTBS) and resin-dentin interfacial characteristics. Twenty-four human third molars were used for the μTBS test. Bonded peripheral dentin slices were separated to observe the resin-dentin interface and measure the adhesive layer thickness with SEM. Read More

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PICN Nanocomposite as Dental CAD/CAM Block Comparable to Human Tooth in Terms of Hardness and Flexural Modulus.

Materials (Basel) 2021 Mar 3;14(5). Epub 2021 Mar 3.

Division of Biomaterials, Department of Oral Functions, Kyushu Dental University, Fukuoka 803-8580, Japan.

Polymer infiltrated ceramic network (PICN) composites are an increasingly popular dental restorative material that offer mechanical biocompatibility with human enamel. This study aimed to develop a novel PICN composite as a computer-aided design and computer-aided manufacturing (CAD/CAM) block for dental applications. Several PICN composites were prepared under varying conditions via the sintering of a green body prepared from a silica-containing precursor solution, followed by resin infiltration. Read More

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Saliva Influence on the Mechanical Properties of Advanced CAD/CAM Composites for Indirect Dental Restorations.

Polymers (Basel) 2021 Mar 6;13(5). Epub 2021 Mar 6.

Department of Materials Science-CIME, Universidad Politécnica de Madrid, 28040 Madrid, Spain.

This study aims to evaluate the microstructural and mechanical properties of three commercial resin-based materials available for computer-aid design and manufacturing (CAD/CAM)-processed indirect dental restoration: Lava Ultimate Restorative (LU), 3M ESPE; Brilliant Crios (BC), COLTENE and Cerasmart (CS), GC Dental Product. The three types of resin-based composite CAD/CAM materials were physically and mechanically tested under two conditions: directly as received by the manufacturer (AR) and after storage under immersion in artificial saliva (AS) for 30 days. A global approximation to microstructure and mechanical behaviour was evaluated: density, hardness and nanohardness, nanoelastic modulus, flexural strength, fracture toughness, fracture surfaces, and microstructures and fractography. Read More

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Dental Restorative Materials for Elderly Populations.

Polymers (Basel) 2021 Mar 8;13(5). Epub 2021 Mar 8.

State Key Laboratory of Oral Diseases, West China School of Stomatology, National Clinical Research Center for Oral Diseases, Sichuan University, Chengdu 610064, China.

The incidence of dental caries, especially root caries, has risen in elderly populations in recent years. Specialized restorative materials are needed due to the specific site of root caries and the age-related changes in general and oral health in the elderly. Unfortunately, the restorative materials commonly used clinically cannot fully meet the requirements in this population. Read More

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Dentine disorders and adhesive treatments: A systematic review.

J Dent 2021 Mar 30:103654. Epub 2021 Mar 30.

Univ. de Bordeaux, UFR des Sciences Odontologiques, Bordeaux, France; Univ. de Bordeaux, PACEA, UMR 5199, Pessac, France; Centre de Compétence des Maladies Rares Orales et Dentaires, CCMR O-Rares, C.H.U. de Bordeaux, France. Electronic address:

Objectives: A better understanding of the microstructure and mechanical properties of enamel and dentine may enable practitioners to apply the current adhesive dentistry protocols to clinical cases involving dentine disorders (dentinogenesis imperfecta or dentine dysplasia).

Data/sources: Publications (up to June 2020) investigating the microstructure of dentine disorders were browsed in a systematic search using the PubMed/Medline, Embase and Cochrane Library electronic databases. Two authors independently selected the studies, extracted the data in accordance with the PRISMA statement, and assessed the risk of bias with the Critical Appraisal Checklist. Read More

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Hybrid mesoporous nanostructured scaffolds as dielectric biosimilar restorative materials.

Biomed Mater Eng 2021 Mar 23. Epub 2021 Mar 23.

Department of Applied Physics, Nanotechnology and Magnetism Laboratory (NANOMAG), Universidade de Santiago de Compostela, Santiago de Compostela, Spain.

Background: The intricate structure of natural materials is in correspondence with its highly complex functional behaviour. The health of teeth depends, in a complex way, on a heterogeneous arrangement of soft and hard porous tissues that allow for an adequate flow of minerals and oxygen to provide continuous restoration. Although restorative materials, used in clinics, have been evolving from the silver amalgams to actual inorganic fillers, their structural and textural properties are scarcely biomimetic, hindering the functional recovery of the tissue. Read More

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Multispectral SWIR images of the pulp-chamber of posterior teeth .

Proc SPIE Int Soc Opt Eng 2021 Mar 5;11627. Epub 2021 Mar 5.

University of California, San Francisco, San Francisco, Ca 94143-0758.

Intraoral imaging of teeth with SWIR light provides increased contrast of dental caries and restorative materials compared to visible inspection and digital radiography. The objective of this study was to investigate the SWIR optical properties of the dental pulp-chamber floor, walls and canal orifices. We imaged extracted human posterior teeth at 1300-nm and 1500-1700-nm in reflectance and transillumination and compared the tissues properties with visible light images and quantitative light fluorescence. Read More

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Zirconia crowns for children: A systematic review.

Int J Paediatr Dent 2021 Mar 27. Epub 2021 Mar 27.

Department of Developmental Dentistry in the School of Dentistry, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA.

Background: Preformed metal crowns (PMCs) have been the restoration of choice for paediatric dentistry. However, PMCs have a non-aesthetic appearance, which has become a point of concern. Recently, prefabricated zirconia crowns (PZCs) have been increasingly used as an aesthetic restorative material for primary teeth, as they have pleasing properties. Read More

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Comparative analysis of flexural strength of abraded and polished porcelain surfaces - an in vitro study.

J Med Life 2021 Jan-Mar;14(1):61-67

Department of Restorative and Prosthetics Dental Sciences, College of Dentistry, Dar Al Uloom University, Riyadh, Saudi Arabia.

Typically, prosthodontists adjust ceramic restorations glazed surface by grinding prior to insertion. Such alterations of surfaces are necessary for the correction of occlusal interferences. We aimed to evaluate and compare the change in flexural strength of ceramic surfaces after re-glazing and polishing. Read More

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The presence of smear layer affects the antimicrobial action of root canal sealers.

Int Endod J 2021 Mar 24. Epub 2021 Mar 24.

School of Dentistry, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK.

Aim: To assess the chemical and microstructural characteristics of dentine after the use of two irrigation protocols and correlate this with the antimicrobial properties of hydraulic calcium silicate cement (HCSC) sealers and changes to the dentine structure/chemistry after sealer placement.

Methodology: Two irrigation protocols - Protocol A using 2% NaOCl used 5 mL/5 min and Protocol B with 2% NaOCl (5 mL/5 min) followed by 17% EDTA (5 mL/3 min) - were used to prepare dentine. The chemical and microstructural changes following irrigation were assessed by scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and Fourier transform infrared (FT-IR) spectroscopy (n = 5) on dentine obtained from the mid-root and coronal parts of extracted human teeth. Read More

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How well can today's tooth-colored dental restorative materials reproduce the autofluorescence of human teeth? - Ambition and reality!

J Esthet Restor Dent 2021 Mar 24. Epub 2021 Mar 24.

Department of Conservative Dentistry, Periodontology and Endodontology, University Centre of Dentistry, Oral Medicine and Maxillofacial Surgery, University Hospital Tübingen, Tübingen, Germany.

Objectives: The autofluorescence of dental hard tissues has been known for over 100 years. Thus, manufacturers add fluorophores to dental restorative materials to improve the esthetic properties of these materials. So far, there has been no study evaluating the ability of these fluorophores to reproduce the autofluorescence of dental hard tissues. Read More

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Development of new diacrylate monomers as substitutes for Bis-GMA and UDMA.

Dent Mater 2021 Mar 20. Epub 2021 Mar 20.

Hokkaido University, Faculty of Dental Medicine, Department of Biomaterials and Bioengineering, Kita 13, Nishi 7, Sapporo, Hokkaido, Japan.

Objective: Bisphenol A-glycidyl methacrylate (Bis-GMA) and urethane dimethacrylate (UDMA) are widely used as the primary components of (meth)acrylic monomers. However, the use of Bis-GMA, which is a bisphenol A derivative, in dentistry is being questioned after bisphenol A was found to exhibit estrogenic activity. Although UDMA is being considered as a substitute for bis-GMA, the mechanical properties of cured resin composites containing UDMA are less than desirable. Read More

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Impact of hydroxytyrosol on stroke: tracking therapy response on neuroinflammation and cerebrovascular parameters using PET-MR imaging and on functional outcomes.

Theranostics 2021 15;11(9):4030-4049. Epub 2021 Feb 15.

European Institute for Molecular Imaging (EIMI), University of Münster, Münster, Germany.

Immune cells have been implicated in influencing stroke outcomes depending on their temporal dynamics, number, and spatial distribution after ischemia. Depending on their activation status, immune cells can have detrimental and beneficial properties on tissue outcome after stroke, highlighting the need to modulate inflammation towards beneficial and restorative immune responses. Novel dietary therapies may promote modulation of pro- and anti-inflammatory immune cell functions. Read More

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February 2021

Effect of different home-bleaching techniques for a regular or an extended time on enamel properties.

Indian J Dent Res 2020 Nov-Dec;31(6):924-929

Prosthesis Department, School of Dentistry of State University of Rio de Janeiro (UERJ), Rio de Janeiro, RJ, Brazil.

Context: The side effects of bleaching products are still incompletely known.

Aims: This work aims to evaluate the effects of bleaching regimens on colour variation, microstructure, roughness, composition and nanohardness of human dental enamel until 8 weeks.

Settings And Design: : Twenty teeth were cross-sectioned to obtain eighty enamel fragments (50 × 50 mm) divided into four groups: CN (control Negative-artificial saliva), CP10 (10% carbamide peroxide), HP10 (10% hydrogen peroxide), and WS (whitening strips-10% hydrogen peroxide). Read More

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Antimicrobial and physical properties of experimental endodontic sealers containing vegetable extracts.

Sci Rep 2021 Mar 19;11(1):6450. Epub 2021 Mar 19.

Post-Graduate Program in Biochemistry and Bioprospecting, Federal University of Pelotas, Eliseu Maciel Avenue, Building 31, Pelotas, RS, 96010-900, Brazil.

To assess the antimicrobial activity and the physical properties of resin-based experimental endodontic sealers with the incorporation of vegetable extracts obtained from Bixa orellana, Mentha piperita, and Tagetes minuta species. The extracts were obtained and characterized by gas chromatography-mass spectrometry (GC-MS), and minimum inhibitory concentration (MIC) against Streptococcus mutans, Enterococcus faecalis, and Candida albicans. The extracts were individually incorporated into a dual-cure experimental sealer at a mass concentration of 0. Read More

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The Potential Translational Applications of Nanoparticles in Endodontics.

Int J Nanomedicine 2021 9;16:2087-2106. Epub 2021 Mar 9.

Restorative Dental Sciences (Endodontics), Faculty of Dentistry, The University of Hong Kong, Hong Kong Special Administrative Region.

Nanotechnology has substantially progressed in the past decades, giving rise to numerous possible applications in different biomedical fields. In particular, the use of nanoparticles in endodontics has generated significant interest due to their unique characteristics. As a result of their nanoscale dimensions, nanoparticles possess several properties that may enhance the treatment of endodontic infections, such as heightened antibacterial activity, increased reactivity and the capacity to be functionalized with other reactive compounds. Read More

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Exploring the anti-caries properties of baicalin against : an study.

Biofouling 2021 Mar 9:1-9. Epub 2021 Mar 9.

Division of Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong, SAR.

Plant-derived molecules are excellent alternatives to antibiotics as anti-infective agents owing to their minimal cytotoxicity. Herein, the anti-infective property of the hydroxyflavone baicalin, was investigated against biofilms of the key dental caries pathogen . Baicalin inhibited sucrose-dependent biofilm formation at a concentration of 500 µg ml without affecting bacterial growth. Read More

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Digital image correlation in dental materials and related research: A review.

Dent Mater 2021 Mar 11. Epub 2021 Mar 11.

Department of Biomaterials Science, College of Dentistry, Dankook University, 119 Dandaero, Cheonan, Chungnam 31116, Republic of Korea; Institute of Tissue Regeneration Engineering, Dankook University, 119 Dandaero, Cheonan, Chungnam 31116, Republic of Korea. Electronic address:

Objective: Digital image correlation (DIC) is a non-contact image processing technique for full-field strain measurement. Although DIC has been widely used in engineering and biomechanical fields, it is in the spotlight only recently in dental materials. Therefore, the purpose of this review paper is introducing the working principle of the DIC technique with some modifications and providing further potential applications in various dental materials and related fields. Read More

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Novel speed sintered zirconia by microwave technology.

Dent Mater 2021 Mar 11. Epub 2021 Mar 11.

Department of Preventive and Restorative Sciences, University of Pennsylvanian, School of Dental Medicine, 240 S. 40th St., Philadelphia, PA 19104, United States. Electronic address:

Objective: Continuous efforts have been made to hasten the zirconia densification process without compromising properties. This study evaluated the long-term structural durability of microwave speed-sintered zirconia (MWZ) relative to a conventionally sintered zirconia (CZ).

Methods: As-machined dental 3Y-TZP discs (Ø12 × 1. Read More

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Evaluation of radiopacities of CAD/CAM restorative materials and resin cements by digital radiography.

Clin Oral Investig 2021 Mar 11. Epub 2021 Mar 11.

Department of Computer Programming, Vocational School of Technical Sciences, Ordu University, Ordu, Turkey.

Objective: This study aims to compare the radiopacities of computer-aided design/computer-aided manufacture (CAD/CAM) blocks and the adhesive cements used for their bonding.

Materials And Methods: 1 ± 0.2 mm thick specimens were obtained from six different CAD/CAM blocks (Incoris TZI, IPS e. Read More

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Energy-dispersive X-ray Spectroscopy Analysis of Erbium, Chromium:Yttrium-scandium-gallium-garnet-treated Enamel Surfaces: An Study.

J Contemp Dent Pract 2020 Oct 1;21(10):1150-1154. Epub 2020 Oct 1.

Department of Conservative Dentistry and Endodontics, Patna Dental College and Hospital, Patna, Bihar, India.

Aim And Objective: The present study evaluated the effects of erbium, chromium:yttrium-scandium-gallium-garnet (Er,Cr:YSGG) laser on the weight percentage of mineral content of enamel when etched at three different power settings.

Materials And Methods: Total 20 extracted molar teeth were taken as samples. Enamel slabs were prepared by sectioning the crown from the buccal and lingual aspect with a double-sided diamond disk at slow speed. Read More

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October 2020

3D printing parameters, supporting structures, slicing, and post-processing procedures of vat-polymerization additive manufacturing technologies: A narrative review.

J Dent 2021 Mar 5:103630. Epub 2021 Mar 5.

Comprehensive Dentistry Department, College of Dentistry, Texas A&M University, Dallas, TX, United States; Department of Restorative Dentistry, School of Dentistry, University of Washington, Seattle, WA, United States; Researcher at Revilla Research Center, Madrid, Spain. Electronic address:

Objective: To review the elements of the vat-polymerization workflow, including the 3D printing parameters, support structures, slicing, and post-processing procedures, as well as how these elements affect the characteristics of the manufactured dental devices.

Data: Collection of published articles related to vat-polymerization technologies including manufacturing workflow description, and printing parameters definition and evaluation of its influence on the mechanical properties of vat-polymerized dental devices was performed.

Sources: Three search engines were selected namely Medline/PubMed, EBSCO, and Cochrane. Read More

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