Introduction

I am clinical academic with a focus on translational research. Clinically I provide specialist care in the disciplines of Periodontics and Restorative Dentistry as a honorary consultant. I am involved in both undergraduate and postgraduate teaching.

My publications are detailed on the publications tab. 

Follow me on twitter @DrRichHolliday

Roles and Responsibilities (current)

• Director, Newcastle Dental Clinical Research Facility
• Dental Directorate Research Lead
• Degree Programme Director - MClinDent Periodontics
• Dental Implant Lead (joint)
• Webmaster, British Society for Oral and Dental Research (BSODR) 
• Director, Northern Dental Practice Based Research Network

 Qualifications

• Bachelor of Dental Surgery, University of Sheffield. Honours, distinction in Oral Anatomy, Human Diseases, Practice/Clinical section. 
• Membership of Faculty of Dental Surgery, Royal College of Surgeons (RCS) of Edinburgh. MFDS RCS(Ed) 
• MFDS an eundem, RCS of England. MFDS an eundem RCS(Eng)
• Masters in Clinical Research, Newcastle University, MClinRes
• Membership in Periodontics, RCS Edinburgh. M Perio RCSEd
• Doctorate of Philosophy, Newcastle of University. PhD
• FDS (Rest Dent) RCSEd

Memberships

• British Dental Association (BDA)
• The British Society of Periodontology (BSP)
• British Society of Prosthodontics (BSSPD)
• Fellow of the Royal College of Surgeons of Edinburgh (RCSEd)
• Fellow of the Royal College of Surgeons of England (RCSEng)
• British Society for Oral and Dental Research (BSODR)
• International Association for Dental Research (IADR)
• Society for Research on Nicotine and Tobacco (SRNT)

Google scholar: Click here.

SCOPUS: Click here.

My research interests are translational in nature, spanning fundamental research to pragmatic clinical trials and public health research. My current research interests fall into four broad areas:

• Tobacco and novel nicotine products: oral health effects, cessation interventions, harm reduction roles and regulation
• Dental biofilms and periodontal clinical research
• Dental aerosols and cross infection
• Primary care-based research 

Novel nicotine products, particularly e-cigarettes, are my main research focus, having been the topic of my PhD. More recently I have been successful in substantial research funding (£2.8 million) for a multi-centre randomised controlled trial, the ENHANCE-D study. I led this application and am co-chief investigator on this ambitious project, one the largest interventional dental studies every completed in the UK. The study involves 51 funded research staff (excluding primary care practitioners), across seven UK universities, aiming to recruiting over 1000 participants from around 50 dental practices. 

Funding

Total funding (including support costs): £3.2 million

Total funding as PI (excluding support costs): £2.6 million

• Royal College of Surgeons of Edinburgh. 2020, £9562
• British Endodontic Society. 2020, £9000
• National Institute for Heath Research Health Technology Assessment. 2020, £2,286,666 (with NHS support and treatment costs of £537,146)
• Royal College of Surgeons of Edinburgh, Small Pump Priming Grant. 2018, £9900. 
• Centre for Oral Health Research, Newcastle University, Research Grant. 2018, £5000.
• British Society of Periodontology Research Grant. 2013, £3,700.
• Centre for Oral Health Research, Newcastle University, Research Grant. 2013, £3,700. 
• Innovative engagement grant, Newcastle University. 2013, £500.
• National Institute for Health Research, Doctoral Research Fellowship, 2015-2018, 'Electronic cigarettes as a smoking cessation and harm reduction tool in patients with periodontitis: A mixed methods feasibility study.' 2015, £323,713. 
• British Society of Periodontology Clinical Travel Fellowship. 2016, £4000. 
• Society for Research on Nicotine and Tobacco (SRNT) Travel Award. 2017, $500. 

Postgraduate Supervision

Current:

•  PhD – A comparative in vitro study to investigate the effects of novel nicotine products on cells and tissue models; 2019 – present. (Zella Sayeed)
• PhD – Comparative Analysis of electronic cigarette policies in the UK and US: the road map for policy development in Nigeria; 2020 - present. (Anthony Weke)
• PhD - Effect of e-cigarette aerosols on oral keratinocytes and gingival fibroblasts; 2022 - present. (Mahwash Malik)
• PhD - Investigating socioeconomic inequalities in participation and outcomes in the ENHANCE-D Randomised Controlled Trial; 2022 - present. (Frances Warner, University of Glasgow)
• MClinDent - Evaluating the erosive potential of electronic cigarette.2021-present. (Tasneem Alosaimi)
• MRes - Exploring The Evidence Base For The Use Of Azithromycin As An Antimicrobial Adjunct For The Management Of Periodontitis: A Systematic Review And Meta-Analysis. 2021-present. (Marius Marcello Utomo Koerniadi) 

Completed:

•  PhD - Behaviour Change Intervention for Smokeless Tobacco (ST) Cessation Delivered by Dentists in a Dental Setting: A Feasibility Study; 2020-2023 (Shaista Rasool, The University of Edinburgh)
• MClinDent – Identification of clinical care pathways for adult patients with periodontitis: application to novel diagnostic strategies; 2019 – 2021 (Alaa Elhassan)
• MClinDent - A systematic review of the effect of tobacco and nicotine in causing dental staining; 2018-2020. (Rijula Karanjkar)
• Masters in Public Health – University students’ understanding of the potential benefits and risks of electronic cigarettes; 2018 - 2019. (Anthony Weke)
• MClinDent – Staining effects of tobacco smoke and e-cigarette aerosol exposure on resin composite; 2017 - 2019. (Sobia Khan)
• MClinDent - Staining effects of inhaled traditional and novel nicotine products on resin composites; 2017 - 2019. (Nabiya Shahroz)
• Masters in Public Health – E-cigarette use in young adults in the UK: the views, opinions and motivations of 18-25 year old users; 2017 - 2018. (Rosa Evans)
• MClinDent – A questionnaire-based survey of UK dentists', dental therapists/hygienists' and dental nurses current opinions and knowledge towards smoking cessation and electronic cigarettes; 2015 - 2017. (Zohaib Ahmed)

I lead the postgraduate teaching in periodontics and implant dentistry. I am the Degree Programme Director for our MClinDent in Periodontics course.

Find our more about our courses here.

• Articles

  • Tattar R, Jackson J, Holliday R. The impact of e-cigarette use on periodontal health: a systematic review and meta-analysis. Evidence-Based Dentistry 2025, Epub ahead of print.
  • Davies-Barrett AM, Holliday R, Jakubovics NS, Inskip SA. An ‘Index of Oro-dental Disease’: A holistic method for understanding the impacts of different risk factors on oral health in archaeological populations. International Journal of Paleopathology 2025, 48, 43-56.
  • Rasool S, Dobbie F, Ahmad F, Khan Z, Holliday R, Bauld L. Smokeless Tobacco Cessation Support in Dental Hospitals in Pakistan: Dentists and Dental Patients’ Perspectives on Current Practices, Support Needed, and Opportunities Available. Nicotine & Tobacco Research 2024, 26(1), 63-71.
  • Weke A, Holmes RD, McColl E, Finch R, Butcher C, Holliday R. Delivering smoking cessation interventions in NHS primary dental care - lessons from the ENHANCE-D trial. British Dental Journal 2024, epub ahead of print.
  • Allison JR, Tiede S, Holliday R, Durham J, Jakubovics NS. Bioaerosols and Airborne Transmission in the Dental Clinic. International Dental Journal 2024, 74(2), S418-S428.
  • Bell J, Jackson J, McGuckin B, Holliday R. An update on e-cigarettes and orthodontics. Orthodontic Update 2024, 17(3), 114-118.
  • Jackson J, Weke A, Holliday R. Nicotine pouches: a review for the dental team. British Dental Journal 2023, 235, 643-464.
  • Karanjkar RR, Prehsaw PM, Ellis JS, Holliday R. Effect of tobacco and nicotine in causing staining of dental hard tissues and dental materials: A systematic review and meta‐analysis. Clinical and Experimental Dental Research 2023, 9(1), 150-164.
  • Rasool S, Holliday R, Khan Z, Dobbie F, Bauld L. Behaviour Change Intervention for Smokeless Tobacco (ST) Cessation Delivered through Dentists in Dental Settings: A pragmatic pilot trial. Nicotine & Tobacco Research 2023. In Preparation.
  • Allison JR, Dowson C, Jakubovics NS, Nile C, Durham J, Holliday R. Waterline Disinfectants Reduce Dental Bioaerosols: A Multitracer Validation. Journal of Dental Research 2022, 101(10), 1198-1204.
  • Zemouri C, Beltrán EO, Holliday R, Jakubovics NS, Allison JR. Monkeypox: what do dental professionals need to know?. British Dental Journal 2022, 233, 569-574.
  • Allison JR, Dowson C, Pickering K, Cervinskyte G, Durham J, Jakubovics N, Holliday R. Local Exhaust Ventilation to Control Dental Aerosols and Droplets. Journal of Dental Research 2022, 101(4), 384-391.
  • O'Connor C, Bridges-Smith F, Docherty C, Northern Dental Practice Based Research Network, Holliday R. General dental practitioner views on the current and future provision of advanced NHS restorative dentistry services: a cross-sectional survey in England. British Dental Journal 2022, Epub ahead of print.
  • Weke A, Holliday R. Electronic cigarettes: an update on products, regulation, public health approaches and oral health. Community Dental Health 2022, 39(1), 68-73.
  • Rasool S, Holliday R, Dobbie F, Bauld L. Behaviour change intervention for smokeless tobacco (ST) cessation delivered through dentists within a dental setting: a feasibility study protocol. BDJ Open 2022, 8, 12.
  • Allison JR, Edwards DC, Bowes C, Pickering K, Dowson C, Stone SJ, Lumb J, Durham J, Jakubovics N, Holliday R. The effect of high-speed dental handpiece coolant delivery and design on aerosol and droplet production. Journal of Dentistry 2021, 112, 103746.
  • Chaffee B, Couch E, Vora M, Holliday R. Oral and periodontal implications of tobacco and nicotine products. Periodontology 2000 2021, 87(1), 241-253.
  • Preshaw PM, Ide M, Bissett SM, Holliday R, Lansdowne N, Pickering K, Taylor JA, Levonian AM, Pleasance C, Guarnelli ME, Simonelli A, Fabbri C, Farina R, Panagakos FS, Trombelli L. No benefit of an adjunctive phototherapy protocol in treatment of periodontitis: A split-mouth randomized controlled trial. Journal of Clinical Periodontology 2021, 48(8), 1093-1102.
  • Holliday R, Hong B, McColl E, Livingstone-Banks J, Preshaw PM. Interventions for tobacco cessation delivered by dental professionals. Cochrane Database of Systematic Reviews 2021, CD005084.
  • Holliday R, Allison JR, Currie CC, Edwards DC, Bowes C, Pickering K, Reay S, Durham J, Lumb J, Rostami N, Coulter J, Nile CJ, Jakubovics N. Evaluating contaminated dental aerosol and splatter in an open plan clinic environment: Implications for the COVID-19 pandemic. Journal of Dentistry 2021, 105, 103565.
  • Allison JR, Currie CC, Edwards DC, Bowes C, Coulter J, Pickering K, Kozhevnikova E, Durham J, Nile CJ, Jakubovics N, Rostami N, Holliday R. Evaluating aerosol and splatter following dental procedures: Addressing new challenges for oral health care and rehabilitation. Journal of Oral Rehabilitation 2021, 48(1), 61-72.
  • Llandro H, Allison JR, Currie CC, Edwards DC, Bowes C, Durham J, Jakubovics N, Rostami N, Holliday R. Evaluating aerosol and splatter during orthodontic debonding: implications for the COVID-19 pandemic. British Dental Journal 2021, (ePub ahead of Print).
  • Holliday R, Chaffee BW, Jakubovics NS, Kist R, Preshaw PM. Electronic Cigarettes and Oral Health. Journal of Dental Research 2021, 100(9), 906-913.
  • Carter E, Currie C, Asuni A, Goldsmith R, Toon G, Horridge C, Simpson S, Donnell C, Greenwood M, Walton G, Cole B, Durham J, Holliday R. The first six weeks - setting up a UK urgent dental care centre during the COVID-19 pandemic. British Dental Journal 2020, 228, 842–848.
  • Holliday R, McColl E, Bauld L, Preshaw P, Sniehotta F, McDonald S. Perceived influences on smoking behaviour and perceptions of dentist-delivered smoking cessation advice: A qualitative interview study. Community Dentistry and Oral Epidemiology 2020, 48(5), 433-439.
  • Pickering K, Bissett SM, Holliday R, Vernazza C, Preshaw PM. Exploring the use of mouth guards in Muay Thai: a questionnaire survey. BDJ Open 2020, 6, 20.
  • Holliday R, Campbell J, Preshaw PM. Effect of nicotine on human gingival, periodontal ligament and oral epithelial cells. A systematic review of the literature. Journal of Dentistry 2019, 86, 81-88.
  • Holliday R, Preshaw PM, Ryan V, Sniehotta FF, McDonald S, Bauld L, McColl E. A feasibility study with embedded pilot randomised controlled trial and process evaluation of electronic cigarettes for smoking cessation in patients with periodontitis. Pilot and Feasibility Studies 2019, 5, 74.
  • Holliday R, Amin K, Lawrence V, Preshaw PM. Tobacco education in UK dental schools: A survey of current practice. European Journal of Dental Education 2018, 22(2), e248-e252.
  • Ahmed Z, Preshaw PM, Bauld L, Holliday R. Dental professionals’ opinions and knowledge of smoking cessation and electronic cigarettes: a cross-sectional survey in the north of England. British Dental Journal 2018, 225, 947-952.
  • Holliday R, Kist R, Bauld L, Preshaw PM. E-cigarettes and oral health: a balanced viewpoint. Oral Diseases 2017, 23(8), 1180-1181.
  • Rostami N, Shields RC, Yassin SA, Hawkins AR, Bowen L, Luo TL, Rickard AH, Holliday R, Preshaw PM, Jakubovics NS. A Critical Role for Extracellular DNA in Dental Plaque Formation. Journal of Dental Research 2017, 96(2), 208-216.
  • Holliday R, Kist R, Bauld L. E-cigarette vapour is not inert and exposure can lead to cell damage. Evidence-Based Dentistry 2016, 17, 2-3.
  • Holliday R, Preshaw P, Bowen L, Jakubovics N. The ultrastructure of subgingival dental plaque, revealed by high-resolution field emission scanning electron microscopy. BDJ Open 2015, 1, 15003.
  • Holliday R, Stubbs C. The Dental Perspective on Electronic Cigarettes: the good, the bad and the ugly. Oral Health Journal 2015, 16-26.
  • Holliday R, Venugopal S, Howell A, Key W. Operator's ability at assessing a high-speed (air turbine) handpiece before use: an audit. British Dental Journal 2015, 218(2), E3.
  • Holliday R, Venugopal S, Howell A, Keys W. Operator's ability at assessing a high speed (air turbine) handpiece prior to use: an audit. British Dental Journal 2015, 218, E3.
  • Heasman PA, Holliday R, Bryant A, Preshaw PM. Evidence for the occurrence of gingival recession and non-carious cervical lesions as a consequence of traumatic toothbrushing. Journal of Clinical Periodontology 2015, 42(S16), S237-S255.
  • Holliday R, Alani A. Traditional and Contemporary Techniques for Optimizing Root Canal Irrigation. Dental Update 2014, 41, 51-61.
  • Lush N, Holliday R, Chapple J, Nohl F, Cole B. Hypodontia: Aesthetics and Functions Part 1: Aetiology and the Problems. Dental Update 2014, 41(9), 811-815.
  • Holliday R, Lush N, Chapple J, Nohl F, Cole B. Hypodontia: Aesthetics and Function. Part 2: Management. Dental Update 2014, 41(10), 891-898.
  • Holliday R, Corson M, Horridge C. Electronic cigarettes: harm reduction or another addiction?; the dental perspective. Dental Update 2014, 41(8), 667-676.
  • Preshaw P, Holliday R, Law H, Heasman P. Outcomes of non-surgical periodontal treatment by dental hygienists in training: impact of site- and patient-level factors. International Journal of Dental Hygiene 2013, 11(4), 273-279.
  • Holliday R, Beecroft E. Bilateral mandibular premolar dens invaginations: a case report. Case Reports in Dentistry 2012, 474013.
  • Holliday R, Devlin M, Downie J. The Golden Proportion. Scottish Dental Magazine 2011, 50-51.
  • Holliday R, Jackson I. Superior position of the mandibular foramen and the necessary alterations in the local anaesthetic technique: a case report. British Dental Journal 2011, 210(5), 207-211.
  • Johnson S, Holliday R. A clinical audit into record keeping in oral surgery. Oral Surgery 2010, 3(4), 157-158.

• Book Chapter

  • Field C, Bateman H, Holliday R, Wassell R. Clinical Performance. In: Wassell R, Nohl F, Steele J, Walls A, ed. Extra-Coronal Restorations. Cham: Springer, 2018, pp.11-34.

• Conference Proceedings (inc. Abstract)

  • Turani D, Santini A, Holliday R. Resin-Composite Restorations, Can They Be Repaired Using Any Composite System?. In: 2010 IADR/PER General Session. 2010, Barcelona, Spain: International Association for Dental Research.

• Letters

  • Holliday R, Weke A, McColl E. Misleading and worrying. British Dental Journal 2023, 235, 231.
  • Patel N, Docherty C, Allison JR, Walton G, Cole B, Durham J, Jakubovics N, Holliday R. Ventilation is key, open a window. OSF Preprints 2020.
  • Holliday R, Chaffee B, Ryan V, McColl E, Preshaw PM. Letter to the editor regarding “Impact of cigarette smoking and vaping on the outcome of full-mouth ultrasonic scaling among patients with gingival inflammation: a prospective study”. Clinical Oral Investigations 2020, 24, 517-518.
  • Holliday R, Arnott D, Preshaw PM, Bauld L. Smoking: Developing the evidence base. British Dental Journal 2018, 224, 3-4.
  • Holliday R, Ryan V, McColl E, Preshaw PM. Letter to the editor: RE: Comparison of periodontal parameters and self‐perceived oral symptoms among cigarette smokers, individuals vaping electronic cigarettes and never‐smokers: A pilot study. Journal of Periodontology 2018, 89(5), 515-516.
  • Holliday R, Preshaw PM, Bauld L. Smoking cessation: The role of e-cigarettes. British Dental Journal 2017, 222, 3-3.
  • Holliday R, Barclay S, Garnett M, Stacey F. Acidic Saliva Substitutes. British Dental Journal 2015, 218(8), 438-438.

• Online Publication

  • Holmes RD, Holliday R. Smoking cessation interventions in NHS primary dental care: the ENHANCE-D trial. Springer Nature Research Communities, 2024. Available at: https://communities.springernature.com/posts/smoking-cessation-interventions-in-nhs-primary-dental-care-the-enhance-d-trial.