Coronavirus disease 2019 (COVID-19) affects the operations in dentistry, mainly tooth drilling and suction which possibly generate airborne transmission. This article had reported the 3-year retrospective study on the dental service provided by Department of Dentistry, Surin Hospital during the pandemic of COVID-19 in fiscal year (FY) 2020 and 2021 compared with 2019 by the percentage change of dental patients, dental revenue, and services. The study revealed the overall dental patients decreased 19.0 % in FY 2020 and 38.3 % in FY 2021.The revenue from dental services also decreased 20.6 and 36.8%. The dental emergency service decreased 14.8 % in FY 2020 and 23.3 % in FY 2021 while routine treatment services on tooth filling, scaling and tooth extraction in FY 2020 decreased 23.8, 28.6 and 13.5 % respectively, as well as decreased 44.4, 50.5 and 40.0 % respectively in FY 2021. On specialty treatment services, it appeared that Endodontics, Operative Dentistry, Periodontology, Prosthodontics, and Oral-Maxillofacial Surgery services in FY 2020 decreased 48.5, 25.6, 29.0, 39.2 and 9.8% respectively, as well as decreased 63.7, 45.8, 48.8, 56.0 and 30.7% in FY 2021 compared to FY 2019. Therefore, further studies should be conducted on the factors affecting the patient’s decision to receive dental services during the pandemic of COVID-19.

Education : 1988 -Doctor of Dental Surgery ,D.D.S ,Chiang Mai University Thailand 1992 -Graduate Diploma in clinical science (Endodontics) Mahidol University Thailand 2000 -Certification in Clinical Dentistry, Kyushu University Japan -Thai Board in General Dentistry