A5086763872- Dental materials and restorations
- Dental Erosion and Treatment
- Dental Health and Care Utilization
- dental development and anomalies
- Dental Research and COVID-19
- Endodontics and Root Canal Treatments
- Dental Trauma and Treatments
- Oral microbiology and periodontitis research
- Cleft Lip and Palate Research
- Oral and Maxillofacial Pathology
- Dental Implant Techniques and Outcomes
- Bone and Dental Protein Studies
- Dental Education, Practice, Research
- Pediatric health and respiratory diseases
- Emergency and Acute Care Studies
- Orthodontics and Dentofacial Orthopedics
- Global Health Workforce Issues
- Autism Spectrum Disorder Research
- Fluoride Effects and Removal
- Dental Radiography and Imaging
- Diamond and Carbon-based Materials Research
- Nursing Roles and Practices
- Metal and Thin Film Mechanics
- Family and Disability Support Research
- Urological Disorders and Treatments
University of Portsmouth
2024
St Helier Hospital
2024
The University of Western Australia
2012-2020
University of Hong Kong
2003-2012
Prince Philip Dental Hospital
1994-2011
Queen Mary Hospital
2009
Augusta University
2002-2006
Shofu (Japan)
2005-2006
Nihon University
2005-2006
American Association of Orthodontists
2006
<i>Objectives:</i> To assess the impact of early childhood caries (ECC) on quality life in a population preschool children and their families Hong Kong. <i>Methods:</i> A random sample 1,296 Chinese participated survey were subjected to an oral examination for ECC status by 2 trained examiners. The parents asked respond Early Childhood Oral Health Impact Scale (ECOHIS) extra set questions concerning sociodemographic background. <i>Results:</i>The final...
Conservative techniques for improving the appearance of discolored teeth have become popular in past decade. These include: in-office bleaching with 30% hydrogen peroxide, which is applied on etched enamel a gauze pad and then exposed to light; home mild form such as 10% carbamide tooth surface custom-made mouthguards; micro-abrasion 18% hydrochloric acid, pumice slurry. In this study, were performed extracted investigation their microscopic effects enamel. Specimens treated only 37%...
This study was designed to gather data on infant feeding habits and oral hygiene practices of Hong Kong preschool children, the dental knowledge attitudes their caregivers health status same group children.Cross-sectional study.Data gathered for a total 369 boys 297 girls (207 1-year-olds, 269 2-year-olds 190 3-year-olds) with mean age 20.19 (+/- 0.38) months. Information related children attending six randomly selected Maternity Child Health Centres. It obtained by examining interviewing...
Water is required to ionize acid resin monomers for demineralization of tooth substrates. We tested the null hypothesis that altering water concentration in two-step self-etching primers has no effect on their aggressiveness and bonding efficacy dentin. Five experimental were prepared with resin-water-ethanol volume ratios 9-0-1, 8-1-1, 7-2-1, 5-4-1, 3-6-1. They applied smear-layer-covered dentin, followed by a composite build-ups microtensile bond testing TEM examination tracer penetration....
The mechanism responsible for sodium-hypochlorite-induced reduction in dentin bond strength and its reversal with reducing agents is unknown. This study examined the relationship between nanoleakage of compromised bonding to oxidized dentin. Acid-etched was completely depleted demineralized collagen matrix when sodium hypochlorite used. Specimens were bonded two single-bottle adhesives. They immersed ammoniacal silver nitrate 24 hrs before being processed transmission electron microscopy....
Glass-ionomer cements (GICs) are regarded as aqueous gels made up of polyalkenoic acid salts containing ion-leachable glass fillers. The consequence water permeation across the GIC-dentin interface is unknown. This study used SEM, field-emission/environmental SEM (FE-ESEM), and TEM to examine ultrastructure GIC-bonded moist dentin. Dentin surfaces bonded with 6 auto-cured GICs were examined along fractured interfaces. Additional specimens 3 mm away from interfaces controls. revealed...
Water entrapment occurs at resin-dentin interfaces of one-step self-etch adhesives. We hypothesized that by preventing water fluxes from dentin, any would be attributed to incomplete removal adhesive solvents. tested this hypothesis bonding transparent carious dentin containing occluded dentinal tubules. An experimental single-bottle, was applied flat surfaces caries-affected surrounded sound with or without pulpal pressure. Resin-dentin were examined TEM after silver-impregnation. Although...
One-step self-etch adhesives behave as permeable membranes after polymerization, permitting water to move through the cured adhesives. We hypothesize that osmotic blistering occurs in bonded enamel when these are used without composite coupling. Tooth surfaces from extracted human premolars were with 5 one-step They immersed distilled or 4.8 M CaCl 2 , and examined by stereomicroscopy, field-emission/environmental SEM, TEM. Water blisters observed but not dentin specimens water. collapsed...
Self-etching primers/adhesives that combine acidic methacrylate monomers with water in a single bottle are hydrolytically unstable and require refrigeration to extend their shelf-lives. This study tested the null hypothesis one year of intermittent 4-MET-containing simplified self-etching primer does not result hydrolytic changes identifiable by transmission electron microscopy 13 C NMR spectroscopy. Human dentin was bonded UniFil Bond immediately after being unpacked, or at 4°C. Fresh aged...