55,639 results match your criteria Cement Wapno Beton[Journal]


Comparison of Fluoride Release in Conventional Glass-Ionomer Cements with a New Mechanical Mixing Cement.

Oral Health Prev Dent 2020 Apr 1;18(2):319-323. Epub 2020 Apr 1.

Purpose: The aim of this paper was to compare three conventional hand mixing glass-ionomer cements (GICs) and a new mechanical mixing glass-ionomer cement.

Materials And Methods: Samples were measured on days 1, 2, 6, 10, 31, 90 and 180. After 32 and 181 days of monitoring, the samples were recharged by using 1 ml of 2% sodium fluoride gel. Read More

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http://dx.doi.org/10.3290/j.ohpd.a44034DOI Listing

[Periprosthetic fractures of the acetabulum: osteosynthesis].

Chirurg 2020 Jul 2. Epub 2020 Jul 2.

Centrum für Muskuloskeletale Chirurgie, Charité - Universitätsmedizin Berlin, Berlin, Deutschland.

In most cases periprosthetic fractures of the acetabulum are complex injuries and are extremely challenging for the treating medical team. Over the years the frequency of this overall rare entity has increased due to demographic changes. In recent years several treatment algorithms were published and provided the possibility of developing standardized treatment concepts. Read More

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http://dx.doi.org/10.1007/s00104-020-01228-1DOI Listing

Selection and validation of reference genes by RT-qPCR for murine cementoblasts in mechanical loading experiments simulating orthodontic forces in vitro.

Sci Rep 2020 Jul 2;10(1):10893. Epub 2020 Jul 2.

Department of Orthodontics, Dental Clinic, University of Aachen, Pauwelsstr. 30, 52074, Aachen, Germany.

Different structures and cell types of the periodontium respond to orthodontic tooth movement (OTM) individually. Cementoblasts (OC/CM) located in the immediate vicinity of the fibroblasts on the cement have found way to the centre of actual research. Here, we identify and validate possible reference genes for OC/CM cells by RT-qPCR with and without static compressive loading. Read More

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http://dx.doi.org/10.1038/s41598-020-67449-wDOI Listing

Physiochemical properties of copper doped calcium sulfate in vitro and angiogenesis in vivo.

Biotech Histochem 2020 Jul 2:1-8. Epub 2020 Jul 2.

Department of Orthopedics and Traumatology, Nanfang Hospital, Southern Medical University , Guangzhou, China.

Bone cements were prepared by mixing calcium sulfate and copper sulfate in various proportions. We examined physical and physicochemical properties of the copper doped calcium sulfates and the effects of the cements on angiogenesis in vivo. Rod shaped calcium sulfate crystals were visible by scanning electron microscopy in the cement that contained no copper sulfate, whereas plate-like crystals covered the surface of the cement with high copper content. Read More

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http://dx.doi.org/10.1080/10520295.2020.1776392DOI Listing

Modelling of multi-minerals kinetic evolution in hyper-alkaline leachate for a 15-year experiment.

Environ Sci Pollut Res Int 2020 Jun 29. Epub 2020 Jun 29.

Groundwater Protection and Restoration Group, Dept of Civil and Structural Engineering, The University of Sheffield, Sheffield, UK.

Cement has been widely used for low- to intermediate-level radioactive waste management; however, the long-term modelling of multiple mineral transfer between the cement leachate and the host rock of a geological disposal facility remains a challenge due to the strong physical-chemical interactions within the chemically disturbed zone. This paper presents a modelling study for a 15-year experiment simulating the reaction of crystalline basement rock with evolved near-field groundwater (pH = 10.8). Read More

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http://dx.doi.org/10.1007/s11356-020-09875-xDOI Listing

[Minimally invasive stabilization of thoracolumbar osteoporotic fractures].

Unfallchirurg 2020 Jul 1. Epub 2020 Jul 1.

Klinik für Traumatologie, Universitätsspital Zürich, Rämistrasse 100, 8091, Zürich, Schweiz.

Background: Minimally invasive stabilization of thoracolumbar osteoporotic fractures (OF) in neurologically intact patients is well established. Various posterior and anterior surgical techniques are available. The OF classification and OF score are helpful for defining the indications and choice of operative technique. Read More

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http://dx.doi.org/10.1007/s00113-020-00835-1DOI Listing

Process parameters optimization for eco-friendly high strength sandcrete block using Taguchi method.

Heliyon 2020 Jun 23;6(6):e04276. Epub 2020 Jun 23.

Civil Engineering Department, University of Nigeria, Nsukka, Enugu State, Nigeria.

The need for developing sustainable cement-based materials is crucial for the prevention of environmental degradation and promotion of sustainable technologies. In the present study, a sustainable cement-based material was developed for sandcrete block production using coconut shell ash (CSA). The product development was executed using the Taguchi robust design approach, in which an L18 mixed level orthogonal array was adopted. Read More

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http://dx.doi.org/10.1016/j.heliyon.2020.e04276DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7322058PMC

The Effect of Tranexamic Acid and Tourniquet Use on Tibial Cement Penetration in Primary Total Knee Arthroplasties.

Arthroplast Today 2020 Sep 22;6(3):422-426. Epub 2020 Jun 22.

Department of Orthopedics and Traumatology, Namık Kemal University, Faculty of Medicine, Tekirdağ, Turkey.

Background: In this study, our aim was to compare the effects of tourniquet and tranexamic acid (TXA) use on tibial cement penetration in primary total knee arthroplasty (TKA) using radiograph images. In addition, we also aimed at investigating the effects of age, gender, body mass index (BMI), and bone mineral density on cement penetration.

Methods: One hundred seventy patients who underwent TKA for primary osteoarthritis were retrospectively evaluated. Read More

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http://dx.doi.org/10.1016/j.artd.2020.04.010DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7316986PMC
September 2020

Basic properties of novel S-PRG filler-containing cement.

Dent Mater J 2020 Jul 2. Epub 2020 Jul 2.

Department of Gerodontology and Oral Rehabilitation, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University.

This study was aimed to evaluate the effect of a novel surface pre-reacted glass-ionomer (S-PRG) filler-containing cement for root caries. We prepared the cements using five different S-PRG filler amounts (0, 10, 20, 30, and 40 wt%). Compressive strength, ion release, acid buffering capacity, and microstructure of the as-prepared cements were evaluated. Read More

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http://dx.doi.org/10.4012/dmj.2019-317DOI Listing

evaluation of zinc oxide-propolis mixture as root canal filling material in the primary molars: A 24-month follow-up randomized controlled trial.

J Indian Soc Pedod Prev Dent 2020 Apr-Jun;38(2):171-176

Department of Pedodontics and Preventive Dentistry, Vishnu Dental College, Bhimavaram, Andhra Pradesh, India.

Background: Pulpectomy is a routine practice in children with pulpal and periapical infections, the success of which depends on the elimination of bacteria from the root canals. Propolis, a natural product with proven antibacterial and anti-inflammatory properties when mixed with zinc oxide powder as root canal filling material, it could provide good success in endodontic therapy of primary teeth.

Aim: The aim was to evaluate and compare the clinical effectiveness of zinc oxide-propolis mixture with zinc oxide eugenol (ZOE) as root canal filling material in nonvital primary molars. Read More

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http://dx.doi.org/10.4103/JISPPD.JISPPD_127_20DOI Listing

Effect of three silver diamine fluoride application protocols on the microtensile bond strength of resin-modified glass ionomer cement to carious dentin in primary teeth.

J Indian Soc Pedod Prev Dent 2020 Apr-Jun;38(2):138-144

Department of Pediatric and Preventive Dentistry, Manipal College of Dental Sciences, Mangalore, Manipal Academy of Higher Education, Manipal, India.

Background: Use of silver diamine fluoride (SDF) after selective caries excavation can arrest the further progress of the carious lesion. Application of potassium iodide (KI) can reduce the staining due to SDF.

Aim: The aim of the study was to evaluate the effect of the application of SDF, with and without acid etching and KI on the bond strength of resin-modified glass ionomer cement (RMGIC) to the carious dentin of primary teeth. Read More

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http://dx.doi.org/10.4103/JISPPD.JISPPD_159_20DOI Listing

Comparative evaluation of calcium release of the apical plugs formed by mineral trioxide aggregate, Biodentine, and EndoSequence root repair material with and without 2% triple antibiotic powder: An in vitro study.

J Indian Soc Pedod Prev Dent 2020 Apr-Jun;38(2):132-137

Department of Paedodontics and Preventive Dentistry, School of Dental Sciences, Krishna Institute of Medical Sciences Deemed University, Karad, Satara, Maharashtra, India.

Background: Apical plug formation by mineral trioxide aggregate (MTA), Biodentine, and EndoSequence root repair material (RRM) is an excellent alternative technique to the conventional apexification procedure. Several antimicrobial agents have been incorporated in MTA and Biodentine to boost their antimicrobial efficacy. Considering the polymicrobial nature of root canal infection, a combination of potent antimicrobials like triple antibiotic powder (TAP) would be needed to address the diverse flora encountered. Read More

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http://dx.doi.org/10.4103/JISPPD.JISPPD_74_20DOI Listing

Development of Self-Healing Cement Slurry through the Incorporation of Dual-Encapsulated Polyacrylamide for the Prevention of Water Ingress in Oil Well.

Materials (Basel) 2020 Jun 29;13(13). Epub 2020 Jun 29.

Department of Chemical Engineering, Indian Institute of Technology, Roorkee 247667, India.

In the present work, a novel cross-linked polymer was synthesized though the anionic polymerization of cyanoacrylate with moisture as an initiator, methylene-bis-acrylamide as a cross-linker, and linseed oil as a spacer. Two layers of the synthesized polymer was coated over polyacrylamide for its homogenous impregnation in Class-G cement slurry for the synthesis of cement core. Fourier Transformation Infrared spectroscopy and X-Ray diffraction spectrum of the synthesized polymer and cement core were obtained to investigate the presence of different functional groups and phases. Read More

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http://dx.doi.org/10.3390/ma13132921DOI Listing

Water Retention Mechanism of HPMC in Cement Mortar.

Materials (Basel) 2020 Jun 29;13(13). Epub 2020 Jun 29.

School of Materials Science and Engineering, Tongji University, Shanghai, 201804; 2. Shanghai Building Science Research Institute Co., Ltd., Shanghai 200032, China.

In this paper, the effect of HPMC (hydroxypropyl methyl cellulose ether) on the cement mortar water retention (WR) and composition was studied. The relationship between the plastic viscosity and water retention of cement mortar was revealed. The results showed that HPMC formed a colloidal film with a 3D network structure in water, which changed the ability of water to migrate. Read More

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http://dx.doi.org/10.3390/ma13132918DOI Listing

Influence of porcelain firing on changes in the marginal fit of metal-ceramic fixed partial dental prostheses fabricated with laser sintering: An in vivo study.

Dent Med Probl 2020 Jun 30. Epub 2020 Jun 30.

Department of Fixed Prosthodontics, Faculty of Dentistry, Al-Hawash Private University, Homs, Syria.

Background: Marginal fit is the most important criterion in the evaluation of the clinical acceptability of fixed restorations. Due to cement solubility and plaque retention, marginal gaps are potentially harmful to both the teeth and the periodontal tissues.

Objectives: The aim of the study was to investigate the accuracy of the fit of dental metal-ceramic bridges manufactured with the use of direct metal laser sintering (DMLS), and to explore the effects of porcelain firing on the marginal, axial and occlusal fit of metal-ceramic frameworks. Read More

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http://dx.doi.org/10.17219/dmp/114196DOI Listing

Cadmium in bone cement induces necrosis and decreases the viability of residual osteosarcoma cells: A xenograft study.

Acta Orthop Traumatol Turc 2020 Jul 1. Epub 2020 Jul 1.

Department of Orthopedics, Dokuz Eylül University, School of Medicine, İzmir, Turkey.

Objective: The aim of this study was to show whether local application of cadmium-impregnated bone cement can induce apoptosis and decrease the viability of residual osteosarcoma (OS) cells in nude mice.

Methods: K7M2 tumorigenic OS cell line was cultivated in vitro. The xenograft tumor model was formed by subcutaneously adding the tumor cells to athymic nude mice. Read More

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http://dx.doi.org/10.5152/j.aott.2020.20247DOI Listing

[The results of evaluating the degree of influence of human blood plasma on the strength of adhesion of composite material to dentin (one-component adhesive system)].

Stomatologiia (Mosk) 2020 ;99(3):7-10

Russian Medical Academy of Continuing Professional Education of the Ministry of Health of Russia, Moscow, Russia.

Objective: To study the dynamics of changes in the adhesion between the composite and dentin of the tooth when using different volumes of a single-component adhesive system in case of contamination of it with human blood plasma.

Material And Methods: To achieve this goal, the following were used: extracted human teeth, XP Bond one-component adhesive systems (DENTSPLY, Germany), Esthet X HD micrometric restoration material (DENTSPLY, Germany), and centrifuged blood plasma. The strength of the adhesive bond between the composite material and the hard tissues of the tooth was studied using a shear test machine Zwick Roell Z 010 («Zwick», Germany). Read More

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http://dx.doi.org/10.17116/stomat2020990317DOI Listing

[Performance Assessment of Permeable Interlocking Concrete Pavement Facility Structure].

Huan Jing Ke Xue 2020 Feb;41(2):750-755

College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.

Two permeable parking lots and one impervious concrete pavement were constructed in Shanghai to study the hydrological and water quality performance of permeable interlocking concrete pavements (PICP) with different base course materials. The hydrological performance and water quality of the influent and effluent under actual precipitation conditions in 2018 were monitored, and the two PICPs used cement-stabilized crushed stones (PICP1) and crushed stones (PICP2) as the base course, respectively. Results show that the annual total volume reduction rates of PICP1 and PICP2 are 37. Read More

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http://dx.doi.org/10.13227/j.hjkx.201908085DOI Listing
February 2020

Biomimetic Trace Metals Improve Bone Regenerative Properties of Calcium Phosphate Bioceramics.

J Biomed Mater Res A 2020 Jun 30. Epub 2020 Jun 30.

Faculty of dentistry, McGill University, Montreal, Canada.

The bone regenerative capacity of synthetic calcium phosphates (CaPs) can be enhanced through the enrichment with selected metal trace ions. However, defining the optimal elemental composition required for bone formation is challenging due to a large number of possible concentrations and combinations of these elements. We hypothesized that the ideal elemental composition exists in the inorganic phase of the bone extracellular matrix (ECM). Read More

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http://dx.doi.org/10.1002/jbm.a.37051DOI Listing

Construction workers' skin disorders in the Finnish Register of Occupational Diseases in 2005-2016.

Contact Dermatitis 2020 Jul 1. Epub 2020 Jul 1.

Finnish Institute of Occupational Health (FIOH), Occupational health unit, Helsinki, Finland.

Background: Construction workers are a known risk group for occupational skin disease (OSD).

Aims: To study diagnoses and causes of construction workers' OSD in the Finnish Register of Occupational Diseases (FROD) in 2005-2016.

Methods: We searched the FROD for dermatological cases (i) in construction-related occupations defined by ISCO-08 and (ii) in the industrial branch of construction defined by European industry standard classification system (NACE rev. Read More

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http://dx.doi.org/10.1111/cod.13648DOI Listing

Intracardial PMMA bone cement embolism after kyphoplasty-an unusual cause for sudden chest pain, hemothorax and hemopericardium.

Med Klin Intensivmed Notfmed 2020 Jun 30. Epub 2020 Jun 30.

Department of Pneumology and Respiratory Critical Care Medicine, Thoraxklinik, University of Heidelberg, Heidelberg, Germany.

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http://dx.doi.org/10.1007/s00063-020-00698-9DOI Listing

Dental Materials Incorporated with Nanometals and Their Effect on the Bacterial Growth of .

Int J Nanomedicine 2020 18;15:4325-4331. Epub 2020 Jun 18.

Department of Biological Sciences, Faculty of Science, Yarmouk University, Irbid, Jordan.

Purpose: The purpose of this study was to investigate the effect of different commercially used dental materials (RelyX Luting Plus and Dyract Extra) mixed with either a metallic ionic solution or a colloidal suspension of metallic nanoparticles. Both the solution and the suspension contained a mixture of silver, copper, and lithium ions.

Methods: The metal/ion-incorporated dental materials were prepared into disk-shaped samples and tested against the growth of . Read More

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http://dx.doi.org/10.2147/IJN.S251573DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7308144PMC

Co-processing of industrial trade rejects in cement plant.

Waste Manag Res 2020 Jul 1:734242X20936766. Epub 2020 Jul 1.

Department of Mechanical Engineering, Jadavpur University, Kolkata, India.

In India non-hazardous industrial waste is generated at a staggering rate of about 30 million metric tonnes/year; considering the major generators (excluding power plant and mining industry waste) as per Ministry of Housing and Urban Affairs, Government of India (GoI), thus disposing of them is a challenge. The industrial waste generated from fast-moving consumer goods (FMCG) trade rejects and expired product is also enormous (although largely remains unaccounted) and needs to be disposed of by the producer as per the guidelines of the Ministry of Environment, Forests and Climate Change, GoI. Co-processing of this industrial trade rejects in cement plant can be a prominent solution as it reduces the disposal problem of the solid waste stream and provides an alternative methodology for complete thermal and material recovery of the waste with no by-products. Read More

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http://dx.doi.org/10.1177/0734242X20936766DOI Listing

Ilmenite Mud Waste as an Additive for Frost Resistance in Sustainable Concrete.

Materials (Basel) 2020 Jun 28;13(13). Epub 2020 Jun 28.

Instytut Techniki Budowlanej, 00-611 Warsaw, Poland.

Sustainable development leads to the production of building materials that are safer for the environment. One of the ways to achieve sustainability in materials is the addition of industrial wastes and by-products, especially to concrete. However, the addition of waste to concrete often decreases its durability and the scope of aggression of the environment in which the concrete is used has to be reduced. Read More

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http://dx.doi.org/10.3390/ma13132904DOI Listing

Evaluation of Resin-Based Material Containing Copaiba Oleoresin ( Ducke): Biological Effects on the Human Dental Pulp Stem Cells.

Biomolecules 2020 Jun 28;10(7). Epub 2020 Jun 28.

Department of Restorative Dentistry, School of Dentistry, University of Sao Paulo, São Paulo, SP 05508-060, Brazil.

The purpose of this study was to analyze in vitro the biological effects on human dental pulp stem cells triggered in response to substances leached or dissolved from two experimental cements for dental pulp capping. The experimental materials, based on extracts from Ducke (COP), were compared to calcium hydroxide [Ca(OH)] and mineral trioxide aggregate (MTA), materials commonly used for direct dental pulp capping in restorative dentistry. For this, human dental pulp stem cells were exposed to COP associated or not with Ca(OH) or MTA. Read More

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http://dx.doi.org/10.3390/biom10070972DOI Listing

Effects of Water Content and Temperature on Bulk Resistivity of Hybrid Cement/Carbon Nanofiber Composites.

Materials (Basel) 2020 Jun 27;13(13). Epub 2020 Jun 27.

SINTEF Industry, P.O.Box 4760 Torgarden, 7465 Trondheim, Norway.

Cement nanocomposites with carbon nanofibers (CNFs) are electrically conductive and sensitive to mechanical loads. These features make them useful for sensing applications. The conductive and load sensing properties are well known to be dependent on carbon nanofiber content; however, much less is known about how the conductivity of hybrid cement-CNF depend on other parameters (e. Read More

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http://dx.doi.org/10.3390/ma13132884DOI Listing

Assessment of Rational Design of Self-Compacting Concrete Incorporating Fly Ash and Limestone Powder in Terms of Long-Term Durability.

Materials (Basel) 2020 Jun 26;13(12). Epub 2020 Jun 26.

Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic.

Self-compaction concrete (SCC) is ranked among the main technological innovations of the last decades. Hence, it introduces a suitable possibility for further utilization of supplementary cementitious materials (SCM) in terms of sustainable development. The aim of the work is the assessment of a new approach to binder design, which takes into consideration the activity of the used mineral additive. Read More

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http://dx.doi.org/10.3390/ma13122863DOI Listing

Risk Factors for Revision of Polished Taper-Slip Cemented Stems for Periprosthetic Femoral Fracture After Primary Total Hip Replacement: A Registry-Based Cohort Study from the National Joint Registry for England, Wales, Northern Ireland and the Isle of Man.

J Bone Joint Surg Am 2020 Jun 25. Epub 2020 Jun 25.

Leeds Institute of Rheumatic and Musculoskeletal Medicine (LIRMM), School of Medicine, University of Leeds, Chapel Allerton Hospital, Leeds, United Kingdom.

Background: Total hip replacement (THR) with a cemented polished taper-slip (PTS) femoral stem has excellent long-term results but is associated with a higher postoperative periprosthetic femoral fracture (PFF) risk compared with composite beam stems. This study aimed to identify risk factors associated with PFF revision following THR with PTS stems.

Methods: In a retrospective cohort study, 299,019 primary THRs using PTS stems from the National Joint Registry for England, Wales, Northern Ireland and the Isle of Man (NJR) were included, with a median follow-up of 5. Read More

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http://dx.doi.org/10.2106/JBJS.19.01242DOI Listing

Influence of tooth position within the field of view on the intensity of cone-beam computed tomographic imaging artifacts when assessing teeth restored with various intracanal materials.

Imaging Sci Dent 2020 Jun 18;50(2):141-151. Epub 2020 Jun 18.

Department of Oral Diagnosis, Division of Oral Radiology, State University of Paraíba, Campina Grande, Brazil.

Purpose: This study aimed to quantify the influence of tooth position within the field-of-view (FOV) on cone-beam computed tomography (CBCT) imaging artifacts' intensity when assessing teeth restored with various intracanal materials.

Materials And Methods: Seventy single-rooted teeth were divided into 7 groups (10 teeth per group): NiCr post (NC), AgPd post (AP), metal core fiberglass post (MCFG), fiberglass post (FG), anatomical fiberglass post (AFG), fiberglass post cemented with core build-up cement (FGCo), and anatomical fiberglass post cemented with core build-up cement (AFGCo). All posts were cemented using a regular dual-curing resin cement (Allcem), except FGCo and AFGCo which were cemented with a core build-up dual-curing resin cement (AllcemCore). Read More

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http://dx.doi.org/10.5624/isd.2020.50.2.141DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7314612PMC

Effect of surface finishing treatments on the color stability of CAD/CAM materials.

J Adv Prosthodont 2020 Jun 18;12(3):150-156. Epub 2020 Jun 18.

Department of Prosthodontics, Faculty of Dentistry, Gaziantep University, Gaziantep, Turkey.

Purpose: The aim of this study was to evaluate the effect of different surface finishing processes on the color stabilities of lithium disilicate glass-ceramics, zirconia-reinforced lithium silicate ceramics, and resin nanoceramics after artificial ageing.

Materials And Methods: 216 samples were prepared from 3 different CAD/CAM materials (LAVA Ultimate, IPS e.max CAD, VITA Suprinity) with A1 HT color at a size of 14 × 12 mm and a thickness of 0. Read More

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http://dx.doi.org/10.4047/jap.2020.12.3.150DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7314631PMC

The Impact of Surface Preparation for Self-Compacting, High-Performance, Fiber-Reinforced Concrete Confined with CFRP Using a Cement Matrix.

Materials (Basel) 2020 Jun 24;13(12). Epub 2020 Jun 24.

Faculty of Mining and Geoengineering, AGH University of Science and Technology, 30 Adama Mickiewicza Str., 30-059 Cracow, Poland.

With the development of concrete technology, the tendency to combine different materials with each other to achieve a greater efficiency and durability of structures can be observed. In the modern construction industry, various materials and techniques are increasingly being combined in order to achieve e.g. Read More

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http://dx.doi.org/10.3390/ma13122830DOI Listing

Are long-term auditory results following ossiculoplasty with bone cement as successful as early-middle period results?

Am J Otolaryngol 2020 Jun 19;41(6):102620. Epub 2020 Jun 19.

Istanbul Medeniyet University, School of Medicine, Department of Otorhinolaryngology, Head and Neck Surgery, Goztepe Training and Research Hospital, Istanbul, Turkey. Electronic address:

Purpose: Bone-cement (BC) ossiculoplasty is one of the options to solve ossicular chain problems. Many authors reported successful results in the early or mid-follow-up period; however, there is no long-term result in the literature. We aim to evaluate long term results of BC ossiculoplasty. Read More

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http://dx.doi.org/10.1016/j.amjoto.2020.102620DOI Listing

Preparation of ultrafine fly ash by wet grinding and its utilization for immobilizing chloride ions in cement paste.

Waste Manag 2020 Jun 26;113:456-468. Epub 2020 Jun 26.

School of Civil Engineering, Architecture and Environment, Hubei University of Technology, Wuhan 430070, PR China.

In this study, to promote the chloride binding capacity of coal fired fly ash (RFA) in cementitious materials, wet grinding was employed and ultrafine fly ash (UFA) with D50 = 2.1 μm was prepared; SEM, XRD, TG, FTIR, and XPS were used to evaluate the chemical and physical change in the process of wet grinding. Then, two kinds of binders composed of cement and FA were designed, and the chloride immobilization was comparatively studied in terms of chemical binding, physical binding, and migration resistance. Read More

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http://dx.doi.org/10.1016/j.wasman.2020.06.022DOI Listing

Effect of zirconia decontamination protocols on bond strength and surface wettability.

J Esthet Restor Dent 2020 Jun 29. Epub 2020 Jun 29.

Department of Restorative Dentistry, Piracicaba Dental School, University of Campinas, Piracicaba, SP, Brazil.

Objective: To evaluate the effects of human saliva decontamination protocols on bond strength of resin cement to zirconia (Y-PSZ), wettability, and microbial decontamination.

Materials And Methods: Zirconia plates were sandblasted and divided into (a) not contaminated, (b) contaminated with human saliva and: (c) not cleaned, (d) cleaned with air-water spray, (e) cleaned with 70% ethanol, (f) cleaned with Ivoclean, or (g) cleaned with nonthermal atmospheric plasma (NTAP). The wettability and microbial decontamination of the surfaces were determined after saliva contamination or cleaning. Read More

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http://dx.doi.org/10.1111/jerd.12615DOI Listing

A comparative study on the physicochemical characteristics of nanoparticles released in vivo from CoCrMo tapers and cement-stem interfaces of total hip replacements.

J Biomed Mater Res B Appl Biomater 2020 Jun 28. Epub 2020 Jun 28.

National Centre for Advanced Tribology at Southampton (nCATS), University of Southampton, Southampton, UK.

The good biocompatibility and corrosion resistance of the bulk CoCrMo alloy has resulted in it being used in the manufacture of implants and load bearing medical devices. These devices, however, can release wear and corrosion products which differ from the composition of the bulk CoCrMo alloy. The physicochemical characteristics of the particles and the associated in vivo reactivity are dictated by the wear mechanisms and electrochemical conditions at the sites of material loss. Read More

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http://dx.doi.org/10.1002/jbm.b.34667DOI Listing

Plugging High-Permeability Zones of Oil Reservoirs by Microbially Mediated Calcium Carbonate Precipitation.

ACS Omega 2020 Jun 9;5(24):14376-14383. Epub 2020 Jun 9.

Department of Energy and Mineral Engineering, EMS Energy Institute and G3 Center, Pennsylvania State University, University Park, Pennsylvania 16802, United States.

Simple plugging of the high-permeability "thief zones" of oil reservoirs is the most plausible and also the most straightforwardly achievable approach to enhance sweep efficiency and oil recovery. is a representative microorganism with the ability to precipitate calcium carbonate (CaCO) enzymatic hydrolysis of urea in the presence of calcium ions. Microbially induced calcium carbonate precipitation (MICP) can cement and seal the granular and fractured media and thus can be used as a potential microbial plugging agent for the high-permeability zones of oil reservoirs. Read More

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http://dx.doi.org/10.1021/acsomega.0c00902DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7315417PMC

Bioactivity and Physicochemical Properties of Three Calcium Silicate-Based Cements: An In Vitro Study.

Biomed Res Int 2020 22;2020:9576930. Epub 2020 May 22.

Department of Dental Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran.

Objective: This study evaluated the bioactivity and physicochemical properties of three commercial calcium silicate-based endodontic materials (MTA, EndoSequence Root Repair Material putty, and Biodentine™). . Horizontal sections of 3 mm thickness from 18 root canals of human teeth were subjected to biomechanical preparation with WaveOne Gold large rotary instruments. Read More

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http://dx.doi.org/10.1155/2020/9576930DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7273418PMC

The Induced Membrane Technique for the Management of Segmental Tibial Defect or Nonunion: A Systematic Review and Meta-Analysis.

Biomed Res Int 2020 22;2020:5893642. Epub 2020 May 22.

Division of Orthopedic Traumatology, Department of Orthopedic Surgery, Musculoskeletal Research Center, Chang Gung Memorial Hospital and Chang Gung University, 33302 Tao-Yuan, Taiwan.

Purpose: To identify the predicting factors for union and infection after applying the induced membrane technique (IMT) for segmental tibial defects.

Methods: A systematic review was carried out following the PRISMA guidelines. All databases were searched for articles published between January 2000 and February 2018 using the keywords "Masquelet technique" and "induced membrane technique. Read More

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http://dx.doi.org/10.1155/2020/5893642DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7273462PMC

CAD/CAM-fabricated inlay restorations: Can the resin-coating technique improve bond strength and internal adaptation?

Dent Mater J 2020 Jun 26. Epub 2020 Jun 26.

Department of Cariology and Operative Dentistry, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University (TMDU).

This study assessed the effect of the resin-coating technique on the bond strength and internal adaptation of computer-aided design/computer-aided manufacturing (CAD/CAM)-fabricated inlays. Seventy-two mesio-occlusal-distal (MOD) cavities were prepared and distributed into 3 groups according to the resin-coating technique utilized: uncoated group, G-Premio Bond (1-step) group, and Clearfil SE Bond 2+Clearfil Majesty ES Flow (2-step+Flow) group. The MOD inlays were fabricated and cemented with RelyX Ultimate (RXU), G-CEM LinkForce (LinkForce), or Panavia V5 (PV5). Read More

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http://dx.doi.org/10.4012/dmj.2019-309DOI Listing

Release Behavior, Mechanical Properties and Antibacterial Activity of Ciprofloxacin Loaded- Acrylic Bone Cement; A Mechanistic Study.

Drug Dev Ind Pharm 2020 Jun 29:1-27. Epub 2020 Jun 29.

Department of Pharmaceutics and Nanotechnology, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran.

To evaluate the effect of ciprofloxacin concentration and cement geometry on release, mechanical and antibacterial properties of PMMA bone cement. Cements are used in different geometries and drug concentrations. These can affect cement strength, drug release behavior and its antibacterial activity. Read More

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http://dx.doi.org/10.1080/03639045.2020.1788058DOI Listing

The role of external fixation in the management of infected avascular necrosis after traumatic talus fractures.

Foot (Edinb) 2019 Oct 24;44:101644. Epub 2019 Oct 24.

Trauma Unit, Amsterdam University Medical Center, Location AMC, Amsterdam, The Netherlands. Electronic address:

Purpose: Avascular necrosis (AVN) after fractures of the talus is a distinct and challenging clinical entity that is associated with poor outcomes. Although several articles are published on the management of posttraumatic AVN of the talus, very little is known about the management of infected AVN after talus fractures. Therefore, three cases of infected AVN were treated successfully by extensive debridement, external fixation and arthrodesis. Read More

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http://dx.doi.org/10.1016/j.foot.2019.09.006DOI Listing
October 2019

Forensic study of mechanical properties of dental fillings after immersion in marine environment.

Forensic Sci Int 2020 Jun 10;313:110362. Epub 2020 Jun 10.

Centro Universitário Christus: Street Adolfo Gurgel, 133, Cocó, Fortaleza-Ceará, Brazil.

Human identification and postmortem intervals can be difficult to estimate when corpses are found in drowning situations, and forensic odontologists can bring valuable input to forensic science investigations of this type. Studies that simulate real scenarios are crucial for providing parameters that can be used in real cases. The present study created the necessary circumstances, i. Read More

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http://dx.doi.org/10.1016/j.forsciint.2020.110362DOI Listing

Feasibility of using fly ash-slag-based binder for mine backfilling and its associated leaching risks.

J Hazard Mater 2020 Jun 17;400:123191. Epub 2020 Jun 17.

School of Energy and Environment Engineering, University of Science and Technology Beijing, Beijing, 100083, China. Electronic address:

As a binder to completely replace Portland cement for mine backfilling, the use of clinker-free cementitious materials combined with municipal solid waste incineration (MSWI) fly ash is proposed to achieve the targets of low-cost green backfilling, safe disposal and resource utilisation of bulk urban hazardous waste and metallurgical solid waste. This study balances the positive and negative effects of adding MSWI fly ash to the backfill by controlling its quantity in the binders, thus establishing an optimal concentration of 49 wt.% steel slag (SS), 21 wt. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123191DOI Listing

Allogeneic Fibrin Clot for Odontogenic/Cementogenic Differentiation of Human Dental Mesenchymal Stem Cells.

Tissue Eng Regen Med 2020 Jun 26. Epub 2020 Jun 26.

Department of Oral and Maxillofacial Surgery, Dental Research Institute, School of Dentistry, Seoul National University, 101 Daehak-ro, Chongno-gu, Seoul, 03080, Republic of Korea.

Background: Fetal bovine serum is widely used as a growth supplement for cell culture medium; however, animal-borne pathogens increase the risk of transmitting infectious agents. Platelet-rich fibrin is recently considered as a successful alternative but leukocytes present limits to its allogeneic feasibility. The aim of this study was to explore the effects of allogeneic fibrin clot (AFC) without leukocytes on inducing odontogenic/cementogenic differentiation of human dental pulp stem cells (hDPSCs) and human periodontal ligament stem cells (hPDLSCs) in vitro and in vivo. Read More

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http://dx.doi.org/10.1007/s13770-020-00279-zDOI Listing

Outcomes of cementless fixation in medial unicompartmental knee arthroplasty: review of recent literature.

Musculoskelet Surg 2020 Jun 26. Epub 2020 Jun 26.

U.O. Clinica Ortopedica e Traumatologia -Ospedale Policlinico San Martino - IST, Istituto Nazionale per la Ricerca sul Cancro, Largo Rosanna Benzi, 10, 16132, Genoa, GE, Italy.

Introduction: Medial unicompartmental knee arthroplasty (UKA) is considered the most effective treatment for anteromedial knee osteoarthritis. Cementless fixation of UKA was developed to reduce aseptic loosening. We performed a review of the recent literature to assess the latest outcomes of cementless UKA. Read More

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http://dx.doi.org/10.1007/s12306-020-00672-wDOI Listing

Deep surgical site infection after posterior instrumented fusion for rheumatoid upper cervical subluxation treated with antibiotic-loaded bone cement: Three case reports.

Medicine (Baltimore) 2020 Jun;99(26):e20892

Department of Orthopaedic Surgery, Saitama Medical Center, Saitama Medical University, Kawagoe, Saitama, Japan.

Introduction: Patients with rheumatoid arthritis (RA) tend to be immunosuppressed due to RA itself and the therapeutic drugs administered. The management of surgical site infection (SSI) following upper cervical spinal instrumented fusion in RA patients is challenging; however, literature on the treatment for such conditions is scarce. We report 3 consecutive patients with RA, who developed deep SSI following upper cervical posterior fusion and were treated using antibiotic-loaded bone cement (ALBC). Read More

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http://dx.doi.org/10.1097/MD.0000000000020892DOI Listing

Teeth resorption at cement - enamel junction (CEJ) - Microscopy analysis.

Micron 2020 Jun 18;137:102913. Epub 2020 Jun 18.

International Centre of Electron Microscopy for Materials Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology Al. A. Mickiewicz 30, 30-059 Kraków, Poland. Electronic address:

The cement - enamel junction (CEJ) gains a growing interest in clinical dentistry, due to an increasing number of idiopathic tooth resorption leading to the inevitable loss of permanent dentition. Therefore, in this research study, we investigated healthy and under resorption teeth to verify junctions' morphology in relation to the resorption process, its initiation, and propagation. Using light and scanning electron microscopy we examined the three types of CEJ: 1) coronal cementum, 2) abutment) and 3) the gap between cementum and enamel. Read More

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http://dx.doi.org/10.1016/j.micron.2020.102913DOI Listing

Anti-inflammatory and immunomodulatory effects of Biodentine on human periapical lesion cells in culture.

Int Endod J 2020 Jun 26. Epub 2020 Jun 26.

Institute for the Application of Nuclear Energy, Zemun, Serbia.

Aim: To evaluate the effect of Biodentine eluate on cytotoxicity and production of pro- and anti-inflammatory cytokines and osteodestructive/osteoprotective cytokines in cultures of human periapical lesion cells.

Methodology: Conditioned Biodentine medium (CBM) was prepared according to ISO 10993-12, by incubating Biodentine in RPMI medium (0.2 g/mL) for 3 days at 37°C. Read More

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http://dx.doi.org/10.1111/iej.13351DOI Listing

Pulsatile tinnitus caused by pneumocephalus after Janneta surgery.

Auris Nasus Larynx 2020 Jun 22. Epub 2020 Jun 22.

Sen-En Rifu Otological Surgery Center, Miyagi, Japan.

Pulsatile tinnitus of nonvascular origin is rare. We herein present a case of pulsatile tinnitus complicated with Jannetta surgery due to a communication created between the drilled mastoid cells and epidural space. She was successfully cured by otological surgery where the mastoid tip was packed with bone cement. Read More

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http://dx.doi.org/10.1016/j.anl.2020.05.024DOI Listing

Ca mediated mechanism of octa-brominated dioxin/furan formation via BDE-209 thermolysis: Introducing the Mayer bond order difference.

J Hazard Mater 2020 Jun 17;400:123229. Epub 2020 Jun 17.

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, PR China. Electronic address:

Polybrominated dibenzo-p-dioxins/dibenzofurans (PBDD/Fs) that form during industrial thermal processes, such as the cement kiln co-processing of BDE-209, are highly toxic contaminants. Nevertheless, the formation mechanisms of octa-brominated dioxins/furans (OBDD/Fs), most PBDD/F congeners, and one precursor of the more toxic lower PBDD/Fs from BDE-209 have received little attention. In cement kiln co-processes, the Ca-mediated regulation of OBDD/F formation is still debated. Read More

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http://dx.doi.org/10.1016/j.jhazmat.2020.123229DOI Listing