Dr Kalhan Ashish Chetan

Dr Ashish is a dentist by training and completed his BDS and MDS (Endodontics) from Gujarat University (India) in 2009 and 2012, respectively. After moving to Singapore in 2014 to pursue his PhD at Faculty of Dentistry (NUS), he has been actively working in Population Oral Health and is involved in various cohort studies involving children as well as ageing populations. In 2017, he was awarded the NUS President Graduate Fellowship to support his PhD training. After completing his PhD, he joined the same faculty as a Research Fellow till June 2022 before moving to National Dental Centre Singapore, where he independently coordinated the first nation-wide oral health study in Singaporean children (SINCOHS, 2024-2025), led by Prof Marco Peres.

He is also a core member of the Global Consortium of Oral Health Birth Cohort Studies (GLOBICS), established in 2023 and led by Prof Karen Peres, which aims to answer pressing research questions pertaining to childhood oral health by conducting pooled data analysis from various oral health birth cohort studies worldwide.

• Doctor of Philosophy (PhD), National University of Singapore, Singapore, 2019
• Master of Dental Surgery (MDS), Gujarat University, India, 2012
• Bachelor of Dental Surgery (BDS), Gujarat University, India, 2009 

• NUS President Graduate Fellowship, 2017

1. Kalhan AC, Kalhan TA, Peres MA, Leite FR, Nascimento GG. Diet Quality as a Mediator Linking Tooth Loss and Cardiovascular Diseases in Older Adults. J Periodontal Res. 2026 Feb 26. doi: 10.1111/jre.70080. Epub ahead of print. PMID: 41755532. JIF: 3.4.

2. Tay JRH, Kalhan AC, Cooray U, Nascimento GG. Impact of Tooth Preservation or Replacement on Diet Quality: Modified Treatment Policies Approach. J Periodontal Res. 2025 Nov 27. doi: 10.1111/jre.70053. Epub ahead of print. PMID: 41307339. JIF: 3.4.

3. Peres KG, Nascimento GG, Sarawagi S, Gambetta-Tessini K, Kalhan AC, Li H, Feldens CA, Chaffee BW, Barros AJD, Rugg-Gunn A, Peres MA; GLOBICS Group. The Global Consortium of Oral Health Birth Cohort Studies-GLOBICS. J Dent Res. 2025 Jul;104(7):697-703. JIF: 5.9.

4. Peres KG, Kalhan AC, Sarawagi S, Peres MA, Feldens CA, Chaffee BW, Barros AJD, Rugg-Gunn A, Nascimento GG. An International Research Agenda for Oral Health Birth Cohort Studies. J Dent Res. 2025 Feb;104(2):147-154. JIF: 5.9.

5. Kalhan AC, Kalhan TA, Romandini M, Bitencourt FV, Cooray UMP, Leite FRM, Nascimento GG. Insulin resistance and periodontitis: Mediation by blood pressure. J Periodontal Res. 2025 Mar;60(3):226-235. JIF: 3.4.

6. Nascimento GG, Balan P, Alves-Costa S, Bitencourt FV, Kalhan AC, Leite FRM. Oral and systemic health in Singapore: Revisiting the past to define the future. Community Dent Oral Epidemiol. 2024 Jun;52(3):353-363. JIF: 2.1.

7. Gao X, Wong ML, Kalhan AC, Xie JJ, Siti Hajar H, Yeo ABK, Allen PF. Theory-derived intervention to improve oral health of older adults: study protocol for a randomized controlled trial. BMJ Open. 2022 Dec 12;12(12):e064791. JIF: 2.3.

8. Kalhan AC, Wong ML, Allen F, Gao X. Periodontal disease and systemic health: An update for medical practitioners. Ann Acad Med Singap. 2022 Sep;51(9):567-574. doi: 10.47102/annals-acadmedsg.2021503. PMID: 36189701.

9. Kalhan TA, Lin YT, Kalhan AC, Lin YJ, Chou CC, Hsu CS. Dental plaque pH in predicting caries relapse after general anaesthesia - an exploratory study. Int Dent J. 2019 Dec;69(6):419-427. JIF: 3.7.

10. Lin YT, Kalhan AC, Lin YJ, Kalhan TA, Chou CC, Gao XL, Hsu CS. Risk assessment models to predict caries recurrence after oral rehabilitation under general anaesthesia: a pilot study. Int Dent J. 2018 Dec;68(6):378-385. JIF: 3.7.

11. Un Lam C, Khin LW, Kalhan AC, Yee R, Lee YS, Chong MF, Kwek K, Saw SM, Godfrey K, Chong YS, Hsu CY. Identification of Caries Risk Determinants in Toddlers: Results of the GUSTO Birth Cohort Study. Caries Res. 2017;51(4):271-282. JIF: 2.7.

12. Kalhan TA, Loo EXL, Kalhan AC, Kramer MS, Karunakaran B, Un Lam C, Van Bever H, Shek LP, Goh A, Chong YS, Lee BW, Gluckman P, Kwek K, Saw SM, Godfrey K, Hsu CY. Atopic dermatitis and early childhood caries: Results of the GUSTO study. J Allergy Clin Immunol. 2017 Jun;139(6):2000-2003. JIF: 11.2.