Dr Tay Rong Hao, John

Dr John Tay is an Associate Consultant in the Department of Restorative Dentistry at the National Dental Centre Singapore (NDCS), and a specialist with the Periodontic Unit. His clinical practice covers the management of severe gum disease (Stage III–IV periodontitis), patients with metabolic or genetic disorders affecting the periodontium, multi-disciplinary oral rehabilitation, and periodontal plastic surgery. He also performs comprehensive periodontal and implant surgeries for patients with inflammatory gum conditions, unrestorable dentition, anatomical deformities, and masticatory dysfunction.

Dr Tay completed his dental training at the Faculty of Dentistry, National University of Singapore in 2015, and obtained his Master of Dental Surgery in Periodontology from NUS in 2021, where he was awarded the IADR Medal for distinction in the final MDS examinations. He completed his specialist training in Periodontology at NDCS in 2024 and is a Singapore board-certified periodontist.

Dr Tay also serves as Co-Chair of the NDCS Oral Disease Registry (NDCS-ODR) and Clinical Assistant Professor at Duke-NUS Medical School, and is a Fellow of the Academy of Medicine, Singapore. His research applies causal inference methods to oral epidemiology, healthy ageing, and health services research, with a focus on masticatory function as a modifiable pathway in population health. To date, he has secured ~S$5.78M in competitive research funding as PI or Co-PI, and serves on the editorial boards of the British Dental Journal, Journal of Periodontal Research, and Proceedings of Singapore Healthcare.

Masters of Dental Surgery - National University of Singapore (2021)

Bachelor of Dental Surgery - National University of Singapore (2015)

Global Affiliate, Health Equity Across Lifespan (HEAL) – Oral Health (2026-)

Associate Consultant, National Dental Centre Singapore (2024-present)

Fellow, Academy of Medicine, Singapore (2024-present)

Member, Population Health Research & Implementation Science Committee, National Dental Centre Singapore (2024-present) 

*Corresponding Author †Co-First Author

1. Leite, F. R. M., Tay, J. R. H.†, Chow, D. Y., Ng, E., Nascimento, G. G., & Peres, M. A. (2026). Tooth loss and edentulism are associated with poorer quality of life: A systematic review and meta-analyses. Journal of Periodontal Research.
2. Nascimento, G. G., Tay, J. R. H.†, Ng, E., Chow, D. Y., Peres, M. A., & Leite, F. R. M. (2026). Periodontitis and quality of life: A systematic review and meta-analyses. Journal of Periodontal Research.
3. Li, H., Tay, J. R. H.*†, Malhotra, R., Ma, S., & Peres, M. A. (2026). Subjective masticatory function and healthy life expectancy among older adults in Singapore: A multistate life table analysis. Journal of Dentistry.
4. Tay, J. R. H.*, Ng, E., Siow, D. S. F., Zhan, S. J., Saffari, S. E., López, R., & Preshaw, P. M. (2026). Residual pockets as an endpoint on periodontal disease progression in supportive periodontal care. Journal of Clinical Periodontology.
5. Chow, D. Y., Blythe, R. D., Tay, J. R. H., Nascimento, G. G., & Romandini, M. (2026). Economic impact of periodontitis: Global, regional and national estimates of periodontal expenditure, with forecasts to 2050. Journal of Periodontal Research, 1–42. https://doi.org/10.1111/jre.70104
6. Tay, J. R. H.*, Nascimento, G. G., & Romandini, M. (2026). Dental implant rehabilitation mitigates the increased mortality risk associated with tooth loss: A population-based study. Journal of Periodontal Research.
7. Chen, S. M. S., Ong, Y. J., Soh, L. Y., Tay, A. H. C., Chow, D. Y., & Tay, J. R. H.* (2026). Understanding fluoride hesitancy: A qualitative scoping review. Journal of Dental Research. https://doi.org/10.1177/00220345261428043
8. Ng, E., Tay, J. R. H., Rahmat, M., Mezzomo, L., Alcoforado, G., & Donos, N. (2026). Prosthetic outcomes of implant-assisted maxillary restorations in the edentulous maxilla: A systematic review and meta-analysis. Clinical Oral Implants Research. https://doi.org/10.1111/clr.70116
9. Liu, P., Tay, J. R. H.†, Nascimento, G. G., & Peres, M. A. (2026). Recovering incomplete clustered binary data in longitudinal electronic health records using multiple imputation [Preprint]. SSRN. https://doi.org/10.2139/ssrn.6387459
10. Tay, J. R. H., Bosworth, H. B., Fox, C. H., Gallagher, J. E., Jakubovics, N. S., Schwendicke, F., & Nascimento, G. G. (2026). Implementation research is underdeveloped in oral health: Bridging the gap. Journal of Dental Research. Advance online publication. https://doi.org/10.1177/00220345251410462
11. Tay, J. R. H.*, Nascimento, G. G., Ho, J. S. H., Ragavendran, N., Yeo, B. W. R., Lim, S. S. W., Kallam, H. R., & Peres, M. A. (2026). Establishment of a large-scale oral disease registry (NDCS-ODR) in a national specialty center [Preprint]. medRxiv.
12. Tay, J. R. H.*, Li, H., Leite, F. R. M., Malhotra, R., Nascimento, G. G., Peres, K. G., Tonetti, M. S., & Peres, M. A. (2025). Tooth loss and masticatory function in older adults: A 15-year population-based time trend study in Singapore. Journal of Dentistry, 106297.
13. Ng, E., Donos, N., Jaafar, M. A., Tay, J. R. H., & Mardas, N. (2025). Clinical outcomes of titanium mesh for alveolar bone augmentation: An umbrella review. Clinical and Experimental Dental Research, 11(6), e70250. https://doi.org/10.1002/cre2.70250
14. Tay, J. R. H.*, Kalhan, A. C., Cooray, U., & Nascimento, G. G. (2025). Impact of tooth preservation or replacement on diet quality: Modified treatment policies approach. Journal of Periodontal Research. Advance online publication. https://doi.org/10.1111/jre.70053
15. Balan, P., Leite, F. R. M., Tay, J. R. H., Hartanto, J., Nascimento, G. G., & Romandini, M. (2025). Oral microbiome signatures in periodontitis and edentulism—A population-based study. Journal of Periodontal Research. Advance online publication. https://doi.org/10.1111/jre.70046
16. Chen, S. M. S., Chng, Y. H., Tan, G. H. S., Koh, A. S. E., Lui, J. N., & Tay, J. R. H.* (2025). Single-visit vital root resection and retrograde pulpotomy for periodontally diseased molars: Case series with up to three years of follow-up. British Dental Journal, 239(8), 541–546. https://doi.org/10.1038/s41415-025-8873-2
17. Tay, J. R. H.* (2025). Caries management in young children: Successful multicentre implementation of a minimally invasive, risk-based approach. British Dental Journal, 239(7), 472. https://doi.org/10.1038/s41415-025-9260-8
18. Tay, J. R. H.*, Nascimento, G. G., Chan, A., Malhotra, R., Tonetti, M. S., & Peres, M. A. (2025). Estimating the causal impact of chewing disability on depressive symptoms mediated by loneliness: A longitudinal marginal structural model study of older adults in Singapore. Innovation in Aging. https://doi.org/10.1093/geroni/igaf100
19. Tay, J. R. H.*, Cooray, U., Chan, A., Tonetti, M. S., Nascimento, G. G., & Peres, M. A. (2025). Perceived masticatory function and mortality: A causal study. Journal of Dental Research. https://doi.org/10.1177/00220345251363851
20. Tay, J. R. H.*, Balan, P., & Seneviratne, C. J. (2025). Periodontitis treatment and microbiome in a patient with FAM20A mutation: Case study of 1.5 years. Clinical Advances in Periodontics.
21. Tay, J. R. H.*, Li, H., Romandini, M., & Nascimento, G. G. (2025). Cardiovascular disease detection in dental settings—Development and external validation of a nomogram (PerioCARD). Journal of Periodontal Research. https://doi.org/10.1111/jre.13401
22. Tay, J. R. H.*, Okada, Y., Nadarajan, G. D., Siddiqui, F. J., Barry, T., & Ong, M. E. H. (2025). Pragmatic risk stratification method to identify emergency department presentations for alternative care service pathways: Registry-based retrospective study over 5 years. Journal of Medical Internet Research. https://doi.org/10.2196/73758
23. Tay, J. R. H.*, & Cooray, U. (2025). Letter to editor for "Potential predisposing features of external cervical resorption: An observational study (Patel et al., 2025)". International Endodontic Journal. https://doi.org/10.1111/iej.14215
24. Tay, J. R. H.*, Chow, D. Y., Lim, Y. R. I., & Ng, E. (2025). Enhancing patient-centered information on implant dentistry through prompt engineering: A comparison of four large language models. Frontiers in Oral Health, 6, 1566221. https://doi.org/10.3389/froh.2025.1566221
25. Tay, J. R. H.*, Lim, Y. R. I., Lee, W. Z., Nascimento, G. G., & Ng, E. (2025). Necessity of collaborative health care for patients with stage III and IV periodontitis: Qualitative study. JDR Clinical & Translational Research. https://doi.org/10.1177/23800844251325552
26. Tay, J. R. H.* (2025). Do headgear and mouthguards protect kickboxers? British Dental Journal, 238(5), 331.
27. Tay, J. R. H.*, Holtfreter, B., Baumeister, S. E., Peres, M. A., & Nascimento, G. G. (2025). Application of the 2018 Periodontal Status Classification to Epidemiological Survey Data (ACES) framework to estimate the periodontitis prevalence in the United States. Journal of Clinical Periodontology. https://doi.org/10.1111/jcpe.14132
28. Tay, J. R. H.* (2024). Dental therapists as collaborators in the management of maxillofacial trauma. British Dental Journal, 237(5), 411.
29. Ng, E., Tay, J. R. H. (2024). Periodontal regeneration of vital poor prognosis teeth with attachment loss involving the root apex: two cases with up to 5 years follow-up. Dentistry Journal, 12(6), 170. (IF: 2.6)
    
30. Chow, D. Y., Tay, J. R. H.*, Nascimento, G. G. Systematic Review of Prognosis Models in Predicting Tooth Loss in Periodontitis. Journal of Dental Research (Article in Press). (IF: 8.9)
    
31. Tan, J. Y., Teo, G. N., Ng, E., Tay, A. B. G., Tay, J. R. H.* (2024). Gingival Necrosis Related to Sepsis-Induced Agranulocytosis Due to Pseudomonas aeruginosa Bacteraemia: A Case Report. Journal of Clinical Medicine, 13(5),1285. (IF: 3.9)
    
32. Ng, E., Tay, J. R. H., Mattheos, N., Bostanci, N., Belibasakis, G. N., & Seneviratne, C. J. (2024). A Mapping Review of the Pathogenesis of Peri-Implantitis: The Biofilm-Mediated Inflammation and Bone Dysregulation (BIND) Hypothesis. Cells, 13(4), 315. (IF: 7.7)
    
33. Tay, J. R. H.*, Ng, E., Chow, D.Y., & Sim, C.P.C. (2023). The Use of Artificial Intelligence to Aid in Oral Hygiene Education: A Scoping Review. Journal of Dentistry, 104564. (IF: 4.4)
    
34. Ng, E., Tay, J. R. H., Boey, S. K., Laine, M. L., Ivanovski, S., & Seneviratne, C. J. (2023). Antibiotic resistance in the microbiota of periodontitis patients: an update of current findings. Critical Reviews in Microbiology, 1-12. (IF: 6.5)
    
35. Tay, J. R. H.*, Ng, E., Lim, L. P., & Ong, M. M. A. (2022). The efficacy of probiotics in the management of intra-oral halitosis: A systematic review. Clinical Oral Investigations, 1–14.
36. Tay, J. R. H.*, Ng, E., Lu, X. J., & Lai, W. M. C. (2022). Healing complications and their detrimental effects on bone gain in vertical-guided bone regeneration: A systematic review and meta-analysis. Clinical Implant Dentistry and Related Research, 24(1), 43–71.
37. Ng, E., Tay, J. R. H., Lai, C. W. M., Yeo, A., Lim, L. P., & Ong, M. M. A. (2023). Comparative efficacy of different flapless ridge preservation techniques: A systematic review and meta-analysis. Journal of Oral Implantology, 49(2), 206-217.. (IF: 1.5)
    
38. Ng, E., Tay, J. R. H., Ong, M. M. A., Bostanci, N., Belibasakis, G. N., & Seneviratne, C. J. (2021). Probiotic therapy for periodontal and peri-implant health—Silver bullet or sham? Beneficial Microbes, 1–16.2.  
39.  Ng, E., Tay, J. R. H., & Ong, M. M. A. (2021). Minimally invasive periodontology: A treatment philosophy and suggested approach. International Journal of Dentistry.
40. Ng, E., Tay, J. R. H., Saffari, S. E., Lim, L. P., Chung, K. M., & Ong, M. M. A. (2021). Adjunctive probiotics after periodontal debridement versus placebo: A systematic review and meta-analysis. Acta Odontologica Scandinavica, 1–10.4.     
41. Ng, E., Tay, J. R. H., Leung, N. H. L., & Seneviratne, C. J. (2021). Letter to the editor, "Sources of SARS-CoV-2 and other microorganisms in dental aerosols". Journal of Dental Research, 00220345211037224.5.     
42. Tay, J. R. H.*, Ng, E., Nair, R., Tan, Z. S., & Tan, S. H. X. (2020). Economic evaluations in the treatment and evaluation of patients with periodontal disease: A critical review. Journal of Clinical Periodontology, 48(5), 679–694.6.     
43. Tay, J. R. H., Ng, E., Ong, M. M. A., Sim, C., Tan, K., & Seneviratne, C. J. (2020). A risk-based approach to the COVID-19 pandemic: The experience in National Dental Centre Singapore. Frontiers in Medicine, 7.7.     
44. Tay, J. R. H.*, Lu, X. J., Lai, W. M. C., & Fu, J. H. (2020). Clinical and histological sequelae of surgical complications in horizontal guided bone regeneration: A systematic review and proposal for management. International Journal of Implant Dentistry, 6(1), 1–20.
45. Ng, E., Tay, J. R. H., Balan, P., Ong, M. M. A., Bostanci, N., Belibasakis, G. N., & Seneviratne, C. J. (2020). Metagenomic sequencing provides new insights into the subgingival bacteriome and aetiopathology of periodontitis. Journal of Periodontal Research, 56(2), 205–218.

Book Chapters

1. Seneviratne, J., & Tay, J. R. H. (2026). Poor oral hygiene: A risk factor for periodontal disease. In Lifestyle in oral health and disease: A comprehensive guide for oral healthcare providers (pp. 329–342). Springer Nature Switzerland.