On October 5, 2023, Clin. Prof. Dr. Sirichai Kiattavorncharoen, Dean of Mahidol University Faculty of Dentistry, along with the Dean’s advisors and members of the Faculty Committee, expressed warm congratulations and gave flower bouquets to Clin. Prof. Emeritus Passiri Nisalak, a dean’s advisor who received a Doctor of Philosophy, Honoris Causa (Dentistry), academic year 2022. The congratulatory event took place on the 4ᵗʰ floor of the 50ᵗʰ Anniversary of H.R.H. Princess Maha Chakri Sirindhorn Building.

In this regard, H.R.H. Princess Maha Chakri Sirindhorn conferred the degree certificate upon Clin. Prof. Emeritus Passiri Nisalak at Prince Mahidol Hall, Mahidol University (Salaya campus) on October 9, 2023.