1. Specialty Registrar in Restorative Dentistry, Charles Clifford Dental Hospital, Sheffield, UK
2. Consultant in Restorative Dentistry, University Dental Hospital of Manchester, Higher Cambridge Street, Manchester, M15 6FH, UK
3. Orthodontic Specialist and Clinical Teaching Fellow in Orthodontics, University Dental Hospital of Manchester, Higher Cambridge Street, Manchester, M15 6FH, UK