Dr Anthony (Tony) Johnson (MMedSci, PhD (Sheffield), LCGI, MCGI, FETC, FHEA)
Senior Lecturer
Academic Unit of Restorative Dentistry
School of Clinical Dentistry
Claremont Crescent
Sheffield S10 2TA
Tel: +44 (0)114 27 17940 (office)
Tel: +44 (0)114 27 17935 (Lab)
Fax: +44 (0)114 26 65326
email : a.johnson@sheffield.ac.uk
Biography
Qualified as a Dental Technician in 1972 and obtained advanced dental technology qualifications in ceramics and crown and bridge work (1974) and general dental work (1975). I was also awarded the City and Guilds of London Further Education Teaching Certificate (1976), LCGI (1988) and MCGI (1992). After qualification as a dental technician I worked in the NHS (Charles Clifford Dental Hospital, Sheffield) from 1972 until 1976 when I then joined the staff of the University of Sheffield Dental School as a dental instructor. In 2007 I was appointed Senior Lecturer. I completed my MMedSci in 1991 and my PhD in 1995.
Research Interests
I am a member of the School of Clinical Dentistry´s Oral Biomaterials and Tissue Engineering Research Group. My research interests are wide-ranging and varied. They fall into five main areas:
Biocompatibility of Dental Materials: Different novel ceramic materials are being developed and investigated for dental and medical applications. Particular areas of concern regarding these materials are strength and solubility and ways of improving these areas are being investigated.
Metal-ceramic systems: Metal-ceramic systems are still widely used in dentistry. The effect of individual elements, within various alloy types, on ceramic bonding, biocompatibility and optical properties, are being investigated. Novel titanium powder sintering techniques are also being developed to use in the metal-ceramic field using CAD-CAM technology.
Prosthodontic Materials: PMMA denture base resin has been used in dentistry to make dentures since the 2nd world war. The annual cost to the NHS in repairing broken appliances constructed in these materials is very high. Work is being carried out to try and improve the strength of these materials. Novel coating systems to prevent scratching of these materials in use is also being investigated.
Clinical/Educational Research: Investigations into the effectiveness of teaching and the clinical relevance of various clinical/technical techniques are regularly carried out. A current areas being investigated is partial denture design using computer-aided programmes.
Consultancy: Consultancy work for industrial partners is regularly carried out in a wide range of dental areas.
Teaching Role
The teaching of dental technology and dental materials related subjects to the undergraduate BDS students includes the 1st year introductory course, the 2nd year prosthetics course and the 3rd year advanced restorative course. Partial denture design is also taught to 3rd, 4th and 5th year students. MMedSci students are also taught partial denture design during their core course. Numerous CPD type courses are taught throughout the year on a range of dental technology related subjects.
External Role
External examiner - MSc Dental Technology Barts and The London, Queen Mary's School of Medicine and Dentistry, Queen Mary University, London.
Recent Publications
Books:
Self-Assessment Picture Tests - Dental Technology. White GE & Johnson A. Mosby-Wolfe (1997) ISBN 0-7234-2334-2
Basics of Dental Technology - A Step By Step Approach. Johnson T, Patrick DG, Stokes CW, Wildgoose DG & Wood DJ. Wiley-Blackwell (2011) ISBN 978-1-4051-7875-4
Techniques in Complete Denture Technology. Johnson T & Wood DJ. Wiley-Blackwell (2012) ISBN 978-1-4051-7909-6
Papers:
Johnson A, Shiraishi T, Hurrell-Gillingham K. In vitro biocompatibility of novel Au-Pt-based metal-ceramic alloys. J Oral Sci. 2011, 53; 387-391.
Johnson A, Wildgoose DG. Partial denture design comparisons between inexperienced and experienced undergraduate students and the teaching staff of a UK dental school. BDJ. 2010, 209; 287-292.
Bandyophyay-Ghosh S, Faria P.E.P, Johnson A, Felipucci D.N.B., Reaney I.M, Salata L.A, Brook I.M, Hatton P.V. Osteoconductivity of modified fluorcanasite glass-ceramic for bone tissue augmentation and repair. J. Biomed Mater. Res. Part A, 2010, 760-768.
Johnson, A. Shiraishi, T. Al-Salehi, SK. Ion release from experimental Au-Pt based metal-ceramic alloys. Dent. Mater. 2010, 26; 682-687.
Pourabbas, R. Farajnia, S Kimyai, S. Mohammadnejad, L. Johnson, A. Nejatian, T. In vitro assessment of cutotoxicity of giomer on human gingival fibroblasts. African J. Biotechnology. 2009, 8; 5522-5526.
Liporaci, J.L. Rosa, A.L. Beloti, M.M. Johnson, A. van Noort, R. Barros, V.M. In vitro osteogenesis on fluorcanasite glass-ceramic with three different chemical compositions. J. mater, Sci, Mater, Med. 2008, 19; 833-838.
Bandyopadhyay-Ghosh, S. Reaney, I.M. Johnson, A. Hurrell-Gillingham, K. Brook, I.M. Hatton, P.V. The effect of investment materials on the surface of cast fluorcanasite glasses and glass-ceramics. J. Mater Sci Mater Med. 2008, 19; 839-846.
Al-Salehi, S.K. Hatton, P.V. Johnson, A. Cox, A.G. Mcleod, C. The effect of hydrogen peroxide concentration on metal ion release from dental casting alloys. J. Oral Rehabilitation 2008, 35; 276-282.
Bandyopadhyay-Gosh, S Reaney, I.M. Brook, I.M. Hurrell-gillingham, K. Johnson, A. Hatton, P.V. In Vitro Biocompatibility of Fluorcanasite glass-ceramics for bone tissue repair. J. Biomed. Mater. Res. A. 2007, 80 (1); 175-183.
Mallet da Rocha Barros, V. Liporaci Jr, J.L.J. Rosa, A.L. Junqueira, M.C. Tambasco de Oliveira, P. Johnson, A. van Noort, R. Bone response to three different chemical compositions of fluorcanasite glass-ceramic. J. Biomedical Materials Research Part A. 2007, 83, (2); 480-483.
Fathi, H. M. Johnson, A. Ward, J.M. van Noort, R. Characterization evaluation and processing ability of the novel apatite-mullite glass-ceramic material. El-Taknyia. 2006, 1, (2); 36-59.
Gothic arch tracing devices. Johnson, A. Quintessence J. Dental Technology2006, 4; 130-143.
Bandyopadhyay-Gosh, S. Reanet, I.M. Johnson, A. Brook, I.M. Hurrell-Gillingham, K. Hatton, P.V. Castability and Biocompatability of novel fluorcanasite glass-ceramics. Key Eng. Mater. 2006, Vols 309-311; 293-296.
Nejatian, T. Johnson, A. Van Noort, R. Reinforcement of Denture base resin. Advances in Science and Technology. 2006, 49; 124-129.
Johnson, A. Van Noort, R. Stokes, C.W. Surface analysis of porcelain fused to metal systems. Dental materials. 2006, 22; 330-337.
Fathi, H. Johnson, A. van Noort, R. Ward, J.M. Brook I.M. The effect of calcium fluoride (CaF2) on the solubility of an apatite-mullite glass-ceramic material. Dental Materials. 2005, 21; 551-556. .
Current MPhil/PhD students
Neda M. Al-Kaisy "The design and production of an in-vitro model for testing denture retention (PhD)
Hawa Fathi "The development of novel apatite-mullite glass-ceramic materials for medical and dental applications" (PhD)
Haitham Almansour "Compaction and sintering of titanium powder for dental and medical applications" (PhD)
Omar Al Sadan "Stress distribution in laminate crowns" (MPhil)