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How old is the oldest dentist in the world?

As of July 2025, Guinness World Records confirmed Dr. Etsuro Watanabe of Japan as the world's oldest practicing dentist, at 100 years and 8 months old. Born in 1924, Watanabe continues his work in his hometown clinic, demonstrating remarkable longevity and dedication in the field. His story highlights an enduring passion for the profession and a commitment to serving his community into his centenarian years.