
1968-1972 | 
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Research Assistant to Prof A E W Miles, Dept of Oral Pathology, London Hospital Medical College | | | |

1972-1984 | 
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Non-clinical Scientist, Medical Research Council (MRC) Dental Unit, Bristol | | | |

1984-1988 | 
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Non-clinical Scientist (External Scientific Staff), MRC Dental Group, Bristol | | | |

1988-1998 | 
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Non-clinical Senior Scientist (External Scientific Staff), MRC Dental Group, Bristol | | | |

1993-1998 | 
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Team Leader, MRC Dental Group, Bristol | | | |

1998-present | 
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Research Fellow, Dept of Oral and Dental Science, University of Bristol | | | |

2000-present | 
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Editor-in-Chief, Caries Research Editor, ORCA | | | |

2007-present | 
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Member of Editorial Board, The Open Anthropology Journal | | | |
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Shellis RP, Wahab FK, Heywood BR: The hydroxyapatite ion activity product in acid solutions equilibrated with human enamel at 37oC. Caries Res 1993;27:365-372
Shellis RP, Heywood BR, Wahab FK: Formation of brushite, monetite and whitlockite during equilibration of human enamel with acid solutions at 37oC. Caries Res 1997;31:71-78.
Shellis RP, Lee AR, Wilson RM: Observations on the apparent solubilities of carbonated apatites. J Coll Interf Sci 1999;218:351-358.
Shellis RP, Dibdin GH: Microporosity of enamel and its functional implications. In ‘Teeth: development, evolution and function’, Ed Teaford MF, Smith MM, Ferguson MJ. Cambridge University Press, 2000, pp.242-251.
Eisenburger M, Hughes JA, West NX, Shellis RP, Addy M: The use of ultrasonication to study remineralisation of eroded enamel. Caries Res 2001;35:61-66.
Eisenburger M, Addy M, Hughes JA, Shellis RP: Effect of time on the remineralisation of enamel after citric acid erosion. Caries Res 2001;35: 211-215.
Eisenburger M, Shellis RP, Addy M: Comparative study of wear of enamel induced by alternating and simultaneous combinations of abrasion and erosion in vitro. Caries Res 2003;37:450-456.
Eisenburger M, Shellis RP, Addy M: Scanning electron microscopy of softened enamel. Caries Res 2004;38:67-74.
Shellis RP, Wilson RM: Apparent solubility distributions of hydroxyapatite and enamel apatite. J Coll Interf Sci 2004;278:325-332.
Shellis RP, Finke M, Eisenburger M, Parker DM, Addy M: Relationship between enamel erosion and flow rate. Eur J Oral Sci 2005;113:232-238.
Barbour ME, Shellis RP, Parker DM, Allen GC, Addy M: An investigation of some food-approved polymers as agents to inhibit hydroxyapatite dissolution. Eur J Oral Sci 2005;113:457-61.
Addy M, Shellis RP: Interactions between attrition, abrasion and erosion in tooth wear. In Dental Erosion (Monographs in Oral Science 20) Ed. A Lussi. Basel: Karger, 2006, pp. 17-31.
Barbour ME, Shellis RP: An investigation using atomic force microscopy nanoindentation of dental enamel demineralisation as a function of undissociated acid concentration and differential buffer capacity. Phys Med Biol 2007;52:899–910. Hemingway CA, Shellis RP, Parker DM, Addy M, Barbour ME: Inhibition of hydroxyapatite dissolution by ovalbumin as a function of pH, calcium concentration, protein concentration and acid type. Caries Res 2008;42:348–353. Barbour ME, Shellis RP, Parker DM, Allen GC, Addy M: Inhibition of hydroxyapatite dissolution by whole casein: the effects of pH, protein concentration, calcium, and ionic strength. Eur J Oral Sci 2008;116:473-478.
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