John W. Nicholson

ORCID: 0000-0002-2438-8770
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About
Contact & Profiles
Research Areas
  • Dental materials and restorations
  • Endodontics and Root Canal Treatments
  • Dental Implant Techniques and Outcomes
  • Bone Tissue Engineering Materials
  • Dental Erosion and Treatment
  • Dental Research and COVID-19
  • Dental Radiography and Imaging
  • Orthopaedic implants and arthroplasty
  • Dental Health and Care Utilization
  • Building materials and conservation
  • Concrete and Cement Materials Research
  • Fluoride Effects and Removal
  • Polymer Science and PVC
  • Chemical Synthesis and Characterization
  • Magnesium Oxide Properties and Applications
  • Innovations in Concrete and Construction Materials
  • Organometallic Compounds Synthesis and Characterization
  • Dental Trauma and Treatments
  • Advanced Polymer Synthesis and Characterization
  • Electrostatics and Colloid Interactions
  • Inorganic and Organometallic Chemistry
  • Polymer Nanocomposites and Properties
  • Engineering Technology and Methodologies
  • Dendrimers and Hyperbranched Polymers
  • Drilling and Well Engineering

Queen Mary University of London
2016-2025

Physical Sciences (United States)
2023

King's College London
1993-2021

St Mary's University Twickenham London
2013-2016

Saints Cyril and Methodius University of Skopje
2016

Austin Peay State University
2014

University of Greenwich
2003-2013

Guy's Hospital
2000-2003

King's College Hospital
1997-2001

University of London
1914-2000

10.1016/0025-5408(94)90013-2 article EN Materials Research Bulletin 1994-08-01

summary The interaction of tooth‐coloured dental restorative materials (a conventional glass–ionomer, two resin‐modified glass–ionomers and compomers) with acidic beverages has been studied the aim investigating how long‐term contact affects solution pH specimen surface hardness. For each material (ChemFil Superior, ChemFlex, Vitremer Core Build‐Up/Restorative, Fuji II LC, Dyract AP F2000) disc‐shaped specimens were prepared stored in sets six following storage media: 0·9% NaCl (control),...

10.1111/j.1365-2842.2004.01348.x article EN Journal of Oral Rehabilitation 2004-11-01

For many years, glass-ionomer cements have been described as setting by the formation of a poly(acrylate) matrix. Recent research has suggested that second reaction may be involved, namely, silica So this hypothesis could tested, non-polymer cements, based on an ionomer glass plus acetic acid, were prepared and stored for up to six months. They insoluble in water, their compressive strength was found increase rapidly over period storage. By contrast, product between ZnO acid soluble water....

10.1177/00220345930720020201 article EN Journal of Dental Research 1993-02-01

Summary The purpose of this study was to compare the effects professional tooth whitening agents containing highly concentrated hydrogen peroxide (with and without laser activation), on enamel surface; potential four different toothpastes remineralize any alterations. performed 50 human molars, divided in two groups: treated with Opalescence ® Boost Mirawhite Laser Bleaching. Furthermore, each group into five subgroups, a control one 4 subgroups remineralized with: Mirasensitive hap+,...

10.1111/jmi.12357 article EN Journal of Microscopy 2015-12-21

Abstract Bioactive glass ionomer cements (GICs) have been in widespread use for ∼40 years dentistry and medicine. However, these composites fall short of the toughness needed permanent implants. Significant impediment to improvement has requisite conventional destructive mechanical testing, which is necessarily retrospective. Here we show quantitatively, through novel calorimetry, terahertz (THz) spectroscopy neutron scattering, how GIC’s developing fracture during setting related...

10.1038/ncomms9631 article EN cc-by Nature Communications 2015-11-09

(+)-Tartaric acid is incorporated into glass-ionomer dental cements to control the setting characteristics. FTIR has been used examine as they set, and confirmed previous results that (+)-tartaric reacts more readily with glass than does poly(acrylic acid), thereby delaying of cement. Subsequently, ions released by become available for reaction polyacid, gelation occurs. not only rapidly yield calcium tartrate, but also enhances rate at which aluminum polyacrylate formed within Mesotartaric...

10.1177/00220345880670120201 article EN Journal of Dental Research 1988-12-01
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