Researchers at Hiroshima University have discovered that the number of natural teeth a person has may provide useful clues about long-term survival after surgery for pancreatic ductal adenocarcinoma (PDAC). The study, published in the Journal of Hepato-Biliary-Pancreatic Sciences, found that patients who had 21 or more natural teeth had a median overall survival of 60.7 months, while those with 20 or fewer teeth had a median survival of 39.1 months. This relationship remained statistically significant even after accounting for well-established prognostic factors such as tumor stage, lymph node metastasis, surgical margins, chemotherapy, and nutritional status.
The study suggests that tooth loss may reflect more than just oral function; it could represent lifelong chronic inflammation, frailty, nutritional condition, lifestyle factors, and overall systemic vulnerability accumulated over decades. The researchers emphasize the need for larger multicenter and international studies to validate these findings and explore the biological connections between oral bacteria, chronic inflammation, and pancreatic cancer progression. Ultimately, they aim to establish a new perspective in pancreatic cancer care where prognosis may depend not only on tumor biology but also on the patient’s long-term systemic condition and oral health environment.